--- title: Littelfuse SSAC - Relay Output Time Delay Relays description: Find more about Littelfuse SSAC electronic timers, relays and controls for original equipment manufacturers, for process control and automation. --- [![Littelfuse - Expertise Applied - Answers Delivered](https://info.littelfuse.com/hs-fs/hubfs/Littelfuse%20Logo.png?width=201&height=47&name=Littelfuse%20Logo.png "Littelfuse - Expertise Applied - Answers Delivered")](https://www.littelfuse.com) **Relay-Output Time Delay Relays** Our electromechanical relay-output time delay relays are available with a number of different features, including: delay-on-make, delay-on-break, single shot, interval, and recycle. All of our relay-output time delay relays assure isolation between input and output, as well as no voltage drop across output contact. **[» Back to Main Page](https://info.littelfuse.com/time-delay-relays?hsLang=en-us)** ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/relay-header2.jpg?width=472&height=361&name=relay-header2.jpg) ## [![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/delay-on-make.jpg?width=111&height=51&name=delay-on-make.jpg)](https://info.littelfuse.com/relay-output-time-delay-relays#delaymake) ## [![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/delay-on-break.jpg?width=111&height=51&name=delay-on-break.jpg)](https://info.littelfuse.com/relay-output-time-delay-relays#delaybreak) ## [![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/single-shot.jpg?width=111&height=51&name=single-shot.jpg)](https://info.littelfuse.com/relay-output-time-delay-relays#singleshot) ## [![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/interval-button.jpg?width=111&height=29&name=interval-button.jpg)](https://info.littelfuse.com/relay-output-time-delay-relays#interval) ## [![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/recycling-button.jpg?width=111&height=29&name=recycling-button.jpg)](https://info.littelfuse.com/relay-output-time-delay-relays#recycling) ## [![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/more-button.jpg?width=90&height=29&name=more-button.jpg)](https://info.littelfuse.com/relay-output-time-delay-relays#more) --- ## Delay-On-Make ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/ERDM-thumb.jpg?width=202&height=124&name=ERDM-thumb.jpg) ## ERDM Econo-Timers are a combination of digital electronics and a reliable electromechanical relay. 这些器件为继电器逻辑电路提供DPDT继电器输出，以及输入与输出电压的隔离。 Cost effective for OEM applications, such as random starting, sequencing ON, switch debouncing, anti-short cycling, and other common delay-on-make applications. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erdm_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erdm_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-10.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-10.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/HRDM-thumb.jpg?width=202&height=124&name=HRDM-thumb.jpg) ## HRDM The HRDM Series combines an electromechanical relay output with microcontroller timing circuitry. 它可在五个范围内提供 12 至 230V 的工作电压，并提供工厂固定、板载或外部可调延时，重复精度为 ±0.5%。 The output contact rating allows for direct operation of heavy loads, such as compressors, pumps, blower motors, heaters, etc. This series is ideal for OEM applications where cost is a factor. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdm_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdm_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRDM-thumb.jpg?width=202&height=124&name=KRDM-thumb.jpg) ## KRDM The KRDM Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its solidstate timing circuit provides excellent repeat accuracy and stability. 封装可防止冲击、振动和潮湿。 The KRDM Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdm_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdm_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/ORM-thumb1.jpg?width=202&height=124&name=ORM-thumb1.jpg) ## ORM The ORM Series features open PC board construction for reduced cost. 它具有隔离的 10A DPDT 继电器触点，所有连接均为 0.25 英寸（6.35 毫米）公快速连接端子。时间延迟可以订购为出厂固定、板载旋钮或外部调整。 Time delays from 0.05 - 300 seconds. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_orm_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_orm_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-11.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-11.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/PRLM-thumb.jpg?width=202&height=124&name=PRLM-thumb.jpg) ## PRLM The PRLM Series is designed for use in non-critical timing applications. 它提供低成本、旋钮可调定时控制、完整的 10A 继电器输出和板载 LED 指示。旋钮调节可在 6 个范围内提供长达 10 分钟的保证时间范围。 The onboard LED indicates whether or not the unit is timing (flashing LED) as well as the status of the output. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_prlm_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_prlm_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-9.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-11.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TDM-thumb.jpg?width=202&height=124&name=TDM-thumb.jpg) ## TDM / TDMH / TDML The TDM Series is a delay-on-make timer that combines accurate digital circuitry with isolated, DPDT relay contacts in an industry standard 8-pin plug-in package. 拨码开关调整允许在整个时间延迟范围内精确选择时间延迟。 The TDM Series is the product of choice for custom control panel and OEM designers. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdm_tdmh_tdml_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdm_tdmh_tdml_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) | | --- | --- | | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-m.jpg?hsLang=en-us) [Function](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-m.jpg?hsLang=en-us) | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TRM-thumb.jpg?width=202&height=124&name=TRM-thumb.jpg) ## TRM The TRM Series is a combination of analog electronic circuitry and electromechanical relay output. 它提供具有各种输入电压和时间范围的输入到输出隔离。 Standard plug-in base wiring, fast reset, rugged enclosure, and good repeat accuracy make the TRM a select choice in any OEM application. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_trm_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_trm_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-9.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-9.jpg?hsLang=en-us) | | --- | --- | | | | ## Delay-on-Break ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/HRDB-thumb.jpg?width=202&height=124&name=HRDB-thumb.jpg) ## HRDB The HRDB Series combines an electromechanical, relay output with microcontroller timing circuitry. HRDB提供12至230V的工作电压，有5种选择，工厂固定、外部或板载可调延时，重复精度为±0.5%。 The isolated output contact rating allows for direct operation of heavy loads, such as compressors, pumps, blower motors, heaters, etc. The HRDB is ideal for OEM applications where cost is a factor. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdb_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdb_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRDB-thumb.jpg?width=202&height=124&name=KRDB-thumb.jpg) ## KRDB The KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. 其微控制器定时电路可提供出色的重复精度和稳定性。封装可防止冲击、振动和潮湿。 The KRDB Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdb_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdb_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/ORB-thumb.jpg?width=202&height=124&name=ORB-thumb.jpg) ## ORB The ORB Series' open PCB construction offers the user good economy without sacrificing performance and reliability. 输出继电器有隔离式、 10A 、 DPDT 或 SPDT 三种型号。时间延迟可以订购为出厂固定、板载旋钮或外部调整。 All connections are 0.25 in. (6.35 mm) male quick connect terminals. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_orb_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_orb_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-11.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-11.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TDB-thumb.jpg?width=202&height=124&name=TDB-thumb.jpg) ## TDB / TDBH / TDBL The TDB Series combines accurate digital circuitry with isolated, 10A, DPDT or SPDT contacts in an 8 or 11-pin plug-in package. TDB 系列具有拨码开关可选时间延迟，范围为0.1-10,230秒，有三个范围。 The TDB Series is the product of choice for custom control panel and OEM designers. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdb_tdbh_tdbl_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdb_tdbh_tdbl_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TRB-thumb.jpg?width=202&height=124&name=TRB-thumb.jpg) ## TRB The TRB Series combines an isolated, 10A electromechanical relay output with analog timing circuitry. 由于电路在启动前已与线路完全隔离，因此瞬变触发 TRB 的可能性不大。起始触点位于线路的一侧，可用于作其他负载。 Installation is easy due to the TRB's industry standard 8 or 11-pin plug-in base wiring. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_trb_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_trb_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-9.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-9.jpg?hsLang=en-us) | | --- | --- | | | | ## Single Shot ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/ERDI-thumb.jpg?width=202&height=124&name=ERDI-thumb.jpg) ## ERDI Econo-Timers are a combination of digital electronics and an electromechanical relay. DPDT继电器输出用于继电器逻辑电路，以及输入与输出电压的隔离。 For applications, such as interval on, pulse shaping, minimum run time, etc. The ERD Series is encapsulated to protect the circuitry from shock, vibration and humidity. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erdi_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erdi_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-10.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-10.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/HRDS-thumb.jpg?width=202&height=124&name=HRDS-thumb.jpg) ## HRDS The HRDS Series combines an electromechanical relay output with microcontroller timing circuitry. 它提供 12 至 230V 的运行电压，提供 5 种选项和工厂固定、板载或外部可调延时，重复精度为 ±0.5%。 The output contact rating allows for direct operation of heavy loads, such as compressors, pumps, blower motors, heaters, etc. This series is ideal for OEM applications where cost is a factor. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrds_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrds_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRDS-thumb.jpg?width=202&height=124&name=KRDS-thumb.jpg) ## KRDS The KRDS Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. 其微控制器定时电路可提供出色的重复精度和稳定性。封装可防止冲击、振动和潮湿。 The KRDS Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krds_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krds_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/ORS-thumb.jpg?width=202&height=124&name=ORS-thumb.jpg) ## ORS The ORS Series' open PCB construction offers the user good economy without sacrificing performance and reliability. 输出继电器有隔离式、 10A 、 DPDT 或 SPDT 三种型号。时间延迟可以订购为出厂固定、板载旋钮或外部调整。 All connections are 0.25 in. (6.35 mm) male quick connect terminals. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_ors_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_ors_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-11.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-11.jpg?hsLang=en-us) | | --- | --- | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TDS-thumb.jpg?width=202&height=124&name=TDS-thumb.jpg) ## TDS The TDS Series combines accurate digital circuitry with isolated, 10A rated, DPDT or SPDT relay contacts in an 8 or 11-pin plug-in package. TDS 系列具有拨码开关可选时间延迟，范围从0.1秒到10,230秒，有三个范围。 The TDS Series is the product of choice for custom control panel and OEM designers. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tds_tdsh_tdsl_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tds_tdsh_tdsl_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) | | --- | --- | | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-s.jpg?hsLang=en-us) [Function](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-s.jpg?hsLang=en-us) | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TRS-thumb.jpg?width=202&height=124&name=TRS-thumb.jpg) ## TRS The TRS Series combines an isolated, 10A electromechanical, relay output with analog timing circuitry. 由于电路在启动前已与线路完全隔离，因此瞬变触发 TRS 的可能性不大。起始触点位于线路的一侧，可用于作其他负载。 Installation is easy due to the TRS's industry standard 8 or 11-pin plug-in base wiring. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_trs_datasheet.pdf)[ Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_trs_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-9.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-9.jpg?hsLang=en-us) | | --- | --- | | | | ## Interval ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/ERDI-thumb.jpg?width=202&height=124&name=ERDI-thumb.jpg) ## ERDI Econo-Timers are a combination of digital electronics and an electromechanical relay. DPDT继电器输出用于继电器逻辑电路，以及输入与输出电压的隔离。 For applications, such as interval on, pulse shaping, minimum run time, etc. The ERD Series is encapsulated to protect the circuitry from shock, vibration and humidity. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erdi_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erdi_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-10.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-10.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/HRDI-thumb.jpg?width=202&height=124&name=HRDI-thumb.jpg) ## HRDI The HRDI Series combines an electromechanical relay output with microcontroller timing circuitry. 它可在五个范围内提供 12 至 230V 的工作电压，以及工厂固定、外部或板载可调延时，重复精度为 ±0.5%。 The output contact rating allows for direct operation of heavy loads, such as compressors, pumps, blower motors, heaters, etc. This series is ideal for OEM applications where cost is a factor. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdi_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdi_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRDI-thumb.jpg?width=202&height=124&name=KRDI-thumb.jpg) ## KRDI The KRDI Series is a compact time-delay relay measuring only 2 in. (50.8 mm) square. Its solidstate timing circuit provides excellent repeat accuracy and stability. 封装可防止冲击、振动和潮湿。 TheKRDI Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdi_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdi_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TDI-thumb.jpg?width=202&height=124&name=TDI-thumb.jpg) ## TDI / TDIH / TDIL The TDI Series is an interval timer that combines accurate digital circuitry with isolated, 10A rated, DPDT relay contacts in an 8-pin plug-in package. TDI 系列具有拨码开关可选时间延迟，范围从0.1到10,230秒，有三个范围。 The TDI Series is the product of choice for custom control panel and OEM designers. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdi_tdih_tdil_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdi_tdih_tdil_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) | | --- | --- | | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-i.jpg?hsLang=en-us) [Function](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-i.jpg?hsLang=en-us) | | ## Recycling ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/ERD3-thumb.jpg?width=202&height=124&name=ERD3-thumb.jpg) ## ERD3 Econo-Timers are a combination of digital electronics and a reliable electromechanical relay. DPDT继电器输出用于继电器逻辑电路，以及输入与输出电压的隔离。 Cost effective for OEM applications, such as duty cycling, drying, washing, signaling and flashing. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erd3425a_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_erd3425a_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/ERD3-ERDI-ERDM-function.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/ERD3-ERDI-ERDM-function.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/HRDR-thumb.jpg) ## HRDR The HRDR Series combines an electromechanical relay and microcontroller timing circuitry. 它在五个范围内提供 12 至 230V 的工作电压，以及工厂固定、板载或外部可调的延时，重复精度为 ±0.5%。输出触点的高开关能力允许直接控制压缩机、泵、电机、加热器和照明等重负载。旁路/复位开关选项允许作员中断正常的循环顺序并接通输出继电器。 An excellent choice for OEM applications. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdr_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrdr_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/HRDR-dimensional.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/HRDR-dimensional.jpg?hsLang=en-us) | | --- | --- | | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/HRDR-function.jpg?hsLang=en-us) [Functions](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/HRDR-function.jpg?hsLang=en-us) | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRD3-thumb.jpg?width=202&height=124&name=KRD3-thumb.jpg) ## KRD3 The KRD3 Series measures only 2 in. (50.8mm) square. 其固态定时电路可提供出色的重复精度和稳定性。封装可防止冲击、振动和潮湿。 The KRD3 Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krd3_datasheet.pdf)[ Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krd3_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRDR-thumb.jpg?width=202&height=124&name=KRDR-thumb.jpg) ## KRDR The KRDR Series is a compact time-delay relay measuring only 2 in. (50.8 mm) square. Its solidstate timing circuit provides excellent repeat accuracy and stability. 封装可防止冲击、振动和潮湿。 The KRDR Series is a cost effective recycling timer for OEM applications that require small size, isolation, reliability, and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdr_datasheet.pdf)<http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krdr_datasheet.pdf>[Datasheet](http://ssac.com/files/downloads/30/KRDR.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | | | ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TDR-thumb.jpg?width=202&height=124&name=TDR-thumb.jpg) ## TDR The TDR Series of time-delay relays are comprised of digital circuitry and an isolated, 10A relay output. The on and off delays are selected by means of two, ten position binary switches, which allow the setting of the desired delay to be precise every time. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdr_datasheet.pdf)<http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdr_datasheet.pdf>[Datasheet](http://ssac.com/files/downloads/30/TDR.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) | | --- | --- | ## More ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/HRIS-thumb.jpg?width=202&height=124&name=HRIS-thumb.jpg) ## HRIS / HRDS The HRPS/HRIS Series combines an electromechanical relay output with microcontroller timing circuitry. 它是工厂编程的模块，可用于 13 种标准功能中的任何 1 种。它在两个通用范围内提供 12 至 240V 的工作电压，以及工厂固定、板载或外部可调延时，重复精度为 ±0.5%。输出接触额定值允许直接作重负载，例如压缩机、泵、鼓风机电机、加热器等。该系列非常适合注重成本的OEM应用。HRPS具有非隔离的SPDT继电器触点，而HRIS具有隔离的SPDT继电器触点。 Both offer the most popular timer functions in the industry. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrps_hris_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrps_hris_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) | | --- | --- | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/HRV-thumb.jpg?width=202&height=124&name=HRV-thumb.jpg) ## HRV The HRV combines the accuracy of microcontroller based circuitry with an electromechanical relay output. HRV的开关能力允许直接控制压缩机、泵、电机、加热器和照明等负载。HRV“S”型在达到要启动的启动开关闭合次数后提供售卖时间。HRV“A”型包括所有“S”功能，每增加一次启动开关关闭，总售卖时间可延长。HRV 是成本敏感型单币或代币自动售货机的理想选择。 The electronic circuitry is encapsulated to protect against humidity and vibration. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrv_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_hrv_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-2.jpg?hsLang=en-us) | | --- | --- | | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-CI.jpg?hsLang=en-us) [Function](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-CI.jpg?hsLang=en-us) | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRD9-thumb.jpg?width=202&height=124&name=KRD9-thumb.jpg) ## KRD9 The KRD9 Series microcontroller timing circuit provides excellent repeat accuracy and stability. Cost effective approach for OEM applications that require small size, isolation, reliability, and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krd9_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krd9_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-pse.jpg?hsLang=en-us)[ Functions](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/programacube-function-pse.jpg?hsLang=en-us) | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRPD-thumb.jpg?width=202&height=124&name=KRPD-thumb.jpg) ## KRPD The KRPD Series is a factory programmed time delay relay available with 1 of 12 standard dual functions. 时间延迟可以是工厂固定的、板载的或外部可调的，也可以是固定和可调的组合。SPDT输出继电器触点提供10A的完整额定电流，完全隔离。其微控制器定时电路可提供出色的重复精度和稳定性。封装可防止冲击、振动和潮湿。 The KRPD Series is a cost effective approach for OEM applications that require small size, isolation, accuracy and long life. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krpd_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krpd_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/KRPD-functions.pdf?hsLang=en-us)<https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/HRPS-functions.pdf?hsLang=en-us>[Functions](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/KRPD-functions.pdf?hsLang=en-us) | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/KRPS-thumb.jpg?width=202&height=124&name=KRPS-thumb.jpg) ## KRPS The KRPS Series is a factory programmed time delay relay available with 1 of 15 functions and measures only 2 inches square. KRPS提供各种固定、板载或外部可调的时间延迟。输出继电器触点提供完整的10A额定电流，并具有完全隔离性。其微控制器定时电路可提供出色的重复精度和稳定性。封装可防止冲击、振动和潮湿。对于需要小尺寸、隔离、精确和长寿命的OEM应用来说，KRPS系列是一种经济有效的方法。 Special time ranges and functions are available. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krps_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_krps_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-1.jpg?hsLang=en-us) | | --- | --- | | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/KRPS-functions.pdf?hsLang=en-us)<https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/HRPS-functions.pdf?hsLang=en-us>[Function](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/KRPS-functions.pdf?hsLang=en-us) | | ## ![](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Thumbnails/TDMB-thumb.jpg?width=202&height=124&name=TDMB-thumb.jpg) ## TDMB The TDMB combines both delay-on-make and delay-on-break functions into one plug-in package. 通过两个开关完成时间段的选择，一个用于开启延迟，另一个用于关闭延迟。 SPDT or DPDT output options provide isolated, 10A switching capability. | [![52ff0e80b07d28b590bbc4b30befde52](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/52ff0e80b07d28b590bbc4b30befde52.png?width=19&name=52ff0e80b07d28b590bbc4b30befde52.png)](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdmb_datasheet.pdf) [Datasheet](http://www.littelfuse.com/~/media/protection-relays/datasheets/time-delay-relays/littelfuse_timedelayrelays_tdmb_datasheet.pdf) | [![open_in_new_window](https://info.littelfuse.com/hs-fs/hubfs/Electrical/Protection-Relays/landing-pages/open_in_new_window.png?width=21&name=open_in_new_window.png)](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) [Dimensional Drawing](https://info.littelfuse.com/hubfs/Electrical/Protection-Relays/landing-pages/Timer-Functions/figure-8.jpg?hsLang=en-us) | | --- | --- | | | | **To be contacted with more information,** **please fill out the form below.** [Data Privacy & Communications](https://www.littelfuse.com/data-privacy-and-communications) | [Website Terms of Use](https://www.littelfuse.com/legal/website-terms-of-use) | [Product Disclaimer](https://www.littelfuse.com/legal/product-disclaimer) Littelfuse, Inc. 6133 North River Road, Suite 500, Rosemont, IL 60018 USA, 773-628-1000 Copyright © 2026 Littelfuse, Inc.