--- title: Creating a Class H xDSL Line Driver Protection Solution with the Biased SIDACtor® Protection Thyristor Application Note --- [![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) ![Littelfuse Electronics Circuit Protection Resources](http://www.littelfuse.com/~/media/electronics/website_contents/landing_page_images/banners/Littelfuse_S2D_CTA_Landing_Banner.jpg.jpg "Littelfuse Electronics Circuit Protection Resources") # Download! Creating a Class H xDSL Line Driver Protection Solution with the Biased SIDACtor® Protection Thyristor Application Note ![Class H xDSL Line Driver Protection](https://info.littelfuse.com/hs-fs/hubfs/Electronics/Landing_Page_Images/SIDACtor_ClassH_xDSL_LineDriver_App_Note_image.jpg?width=170&name=SIDACtor_ClassH_xDSL_LineDriver_App_Note_image.jpg "Class H xDSL Line Driver Protection") Today, most telephone lines are located in outdoor environments. 这种脆弱性使得xDSL芯片组或集成电路易遭受雷击感应浪涌和其他电气瞬态现象的危害。因此，用于保护其安全的电路保护设备必须足够强大，同时具有极低电容以维持信号完整性。作为全球领先的电路保护方案供应商，Littelfuse设计了偏压SIDACtor第三级保护晶闸管（SDP0240T023G6），它是完美均衡的宽带保护解决方案。该器件可提供极低电容和高浪涌耐受性，能够保护现代xDSL芯片组免受损害或过早失效。SDP0240T023G6能对浪涌作出更快响应，从而改善ESD、雷击和电源故障浪涌保护。想了解这款强大固态元件的更多信息？ Download your free application note today to explore: Download your free copy to learn about: - The key benefits of silicon crowbar technology, including lower overshoot voltages and improved power fault surge protection - The device's outstanding surge capability delivered in a compact, surface-mount package - The component's compatibility with DSL bandplans up to and including 30 MHz - How the component's off-state voltage and leakage current make it ideal for Class H DSL line drivers - A non-biased capacitance variance vs. line voltage chart - A diagram showing an optimized overvoltage protection configuration for xDSL line drivers [![Share on Facebook](https://static.hubspot.com/final/img/common/icons/social/facebook-24x24.png)](http://www.facebook.com/share.php?u=https%3A%2F%2Finfo.littelfuse.com%2Fcreating-a-class-h-xdsl-line-driver-protection-solution%3Futm_medium%3Dsocial%26utm_source%3Dfacebook) [![Share on LinkedIn](https://static.hubspot.com/final/img/common/icons/social/linkedin-24x24.png)](http://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Finfo.littelfuse.com%2Fcreating-a-class-h-xdsl-line-driver-protection-solution%3Futm_medium%3Dsocial%26utm_source%3Dlinkedin) [![Share on Twitter](https://static.hubspot.com/final/img/common/icons/social/twitter-24x24.png)](https://twitter.com/intent/tweet?original_referer=https%3A%2F%2Finfo.littelfuse.com%2Fcreating-a-class-h-xdsl-line-driver-protection-solution%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&url=https%3A%2F%2Finfo.littelfuse.com%2Fcreating-a-class-h-xdsl-line-driver-protection-solution%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&source=tweetbutton&text=Creating%20a%20Class%20H%20xDSL%20Line%20Driver%20Protection%20Solution%20with%20the%20Biased%20SIDACtor%C2%AE%20Protection%20Thyristor%20Application%20Note) [![Share on Email](https://static.hubspot.com/final/img/common/icons/social/email-24x24.png)](mailto:?subject=Check%20out%20https%3A%2F%2Finfo.littelfuse.com%2Fcreating-a-class-h-xdsl-line-driver-protection-solution%3Futm_medium%3Dsocial%26utm_source%3Demail%20&body=Check%20out%20https%3A%2F%2Finfo.littelfuse.com%2Fcreating-a-class-h-xdsl-line-driver-protection-solution%3Futm_medium%3Dsocial%26utm_source%3Demail) [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.