--- 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. その脆弱な状態により、xDSL チップセットや集積回路は、雷やその他の電気的過渡現象に起因するサージに曝される場合があります。このため、それらを守る回路保護デバイスは、非常に堅牢であり、かつシグナルインテグリティを維持できるようキャパシタンスのきわめて低いものでなければなりません。回路保護のグローバルリーダーであるリテルヒューズは、完璧なバランスのブロードバンド保護ソリューションとして、バイアス交流用シリコンダイオード第 3 保護サイリスタ (SDP0240T023G6) を設計しました。このデバイスは、現代の xDSL チップセットをダメージや早期故障から守るため、非常に低いキャパシタンスと高度なサージ耐性を同時に提供します。SDP0240T023G6 はサージに素早く対応し、ESD、雷、および電源障害サージに対して優れた保護機能を提供します。堅固なソリッドステートコンポーネントについての詳細はこちら 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.