{"id":38770,"date":"2026-11-10T19:33:01","date_gmt":"2026-11-10T11:33:01","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/"},"modified":"2026-11-10T19:34:40","modified_gmt":"2026-11-10T11:34:40","slug":"usb-2-0-esd-diode-placement","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/","title":{"rendered":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#usb_20_esd_protection\" >usb 2.0 esd protection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#usb_esd_protection_circuit\" >usb esd protection circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#usb_20_esd_protection_diode\" >usb 2.0 esd protection diode<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#esd_diode_placement\" >esd diode placement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#usb_esd_protection_layout\" >usb esd protection layout<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#usb_differential_pair_routing\" >usb differential pair routing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#usb_20_differential_impedance\" >usb 2.0 differential impedance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#usb_20_eye_diagram\" >usb 2.0 eye diagram<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#FAQ\" >FAQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#Sources\" >Sources<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#Project_Review\" >Project Review<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div><p>For a USB 2.0 High-Speed port, start with a low-capacitance ESD diode close to the connector. Route D+ and D\u2212 past the protection pads without long branches, and give the diode a short return into the intended reference. Verify both USB signal quality and system ESD behavior: a board can enumerate and still reset during a discharge, or survive a strike and still fail the High-Speed eye test.<\/p>\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/usb-2-0-esd-protection.jpg\" alt=\"USB-C receptacle with small protection components at the edge of an assembled PCB\" width=\"1200\" height=\"675\" style=\"max-width:100%;height:auto;\"><figcaption>Illustrative rendering of a connector area, not a reference layout or a test result.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"usb_20_esd_protection\"><\/span>usb 2.0 esd protection<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Protect the path from the exposed connector to the USB transceiver. When a transient exceeds the diode&#8217;s operating region, the diode conducts current into its return path instead of allowing all of the pulse to continue toward the transceiver. During normal signaling the device should remain off, but its capacitance still loads the pair. The goal is to minimize both the discharge loop and the disturbance seen by the data signals.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"usb_esd_protection_circuit\"><\/span>usb esd protection circuit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Draw two paths before choosing the footprint: the D+\/D\u2212 signal path from the connector to the PHY, and the transient current path from each exposed data line through its protector into the designated return. The reference circuit for the selected part determines which pin is the return and whether the device uses a rail reference. A D+\/D\u2212 protector does not establish protection for VBUS, CC or SuperSpeed pairs. For the rest of the interface, see the <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/08\/usb-c-pcb-design\/\">USB-C PCB design guide<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"usb_20_esd_protection_diode\"><\/span>usb 2.0 esd protection diode<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Choose a device against the PHY and connector requirements, not the largest advertised discharge rating. For example, TI&#8217;s USB application note lists ESD122 as a dual-channel D+\/D\u2212 option with a 3.6 V reverse working voltage and 0.2 pF listed capacitance. Those figures belong to that device; use its current datasheet for test conditions and limits, then check actual layout and system behavior.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td><strong>Parameter<\/strong><\/td>\n<td><strong>Decision check<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Working voltage, V<\/td>\n<td>Check against normal line voltage<\/td>\n<\/tr>\n<tr>\n<td>Line capacitance, pF<\/td>\n<td>Use stated test conditions and PHY budget<\/td>\n<\/tr>\n<tr>\n<td>Clamping voltage, V<\/td>\n<td>Compare only at matching pulse conditions<\/td>\n<\/tr>\n<tr>\n<td>Channel and package<\/td>\n<td>Confirm pin map and a routable return<\/td>\n<\/tr>\n<tr>\n<td>Discharge rating, kV<\/td>\n<td>Check method; verify on the complete product<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2><span class=\"ez-toc-section\" id=\"esd_diode_placement\"><\/span>esd diode placement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Put the protector at the first practical point after the connector and keep both the connection to the data pads and the discharge return short. A component can look close in the placement view while its ground trace makes a long trip around a cutout. Check the copper layers and return vias, not just the component outline. Do not route the unprotected connector segment alongside sensitive circuitry if it can be avoided.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/esd-diode-placement.jpg\" alt=\"Close-up of a board-edge USB-C receptacle and a nearby black leadless component\" width=\"1200\" height=\"675\" style=\"max-width:100%;height:auto;\" loading=\"lazy\"><figcaption>Illustrative rendering. Verify the chosen footprint and discharge return on the actual PCB.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"usb_esd_protection_layout\"><\/span>usb esd protection layout<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Prefer flow-through routing when the part and footprint allow the data traces to pass directly through the protection-pad area. The diode remains a shunt element; the name describes the routing, not a series electrical connection. A short branch can be an alternative if the pinout forces it and the implemented design passes both signal and system ESD tests.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<tbody>\n<tr>\n<td><strong>Routing option<\/strong><\/td>\n<td><strong>Use and trade-off<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Flow-through<\/td>\n<td>First choice when pad map and return align<\/td>\n<\/tr>\n<tr>\n<td>Very short branch<\/td>\n<td>Possible when constrained; measure the result<\/td>\n<\/tr>\n<tr>\n<td>Long branch or remote clamp<\/td>\n<td>Revise: extra stub and transient loop<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2><span class=\"ez-toc-section\" id=\"usb_differential_pair_routing\"><\/span>usb differential pair routing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Keep the two data paths physically similar through the connector, protector and first layer transition. Review reference continuity and avoid adding a long test stub to only one member of the pair. In a hypothetical compact service-port board that resets during cable-side testing, first inspect the discharge route and nearby reset or power circuits. If the same board also shows poor High-Speed signaling, check the diode capacitance, pad discontinuities and pair asymmetry before choosing a different clamp rating.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"usb_20_differential_impedance\"><\/span>usb 2.0 differential impedance<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The usual High-Speed differential routing target is 90 \u03a9 nominal; confirm the tolerance and stackup requirements for the design. A calculated trace width covers the uniform section, not the pad and via transitions. Review those transitions separately, and include the protection device&#8217;s capacitance. The relevant data rate is 480 Mbit\/s in High-Speed mode, but edge behavior is not determined by the bit rate alone.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"usb_20_eye_diagram\"><\/span>usb 2.0 eye diagram<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>After a layout revision, verify the applicable High-Speed electrical test separately from the system ESD test. Use the specified USB test mode and fixture for the electrical test; for ESD, record the strike point, polarity, operating mode and allowed recovery behavior under the product test plan. Monitor real data traffic, resets and re-enumeration. Release only when the electrical result meets its applicable limits and the product meets its own ESD performance criterion. Successful charging or idle enumeration is not a substitute for either check.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3>Can one array cover VBUS and the two data lines?<\/h3>\n<p>Some products can, but check the channel specifications and routing. VBUS operating voltage and exposure may differ from the data lines.<\/p>\n<h3>Is a larger TVS diode always a safer upgrade?<\/h3>\n<p>No. A larger part may add capacitance or create a worse return path. Check clamp behavior under comparable pulse conditions as well as link quality.<\/p>\n<h3>Can I place the protector on the bottom side?<\/h3>\n<p>Sometimes. Compare the complete path including signal vias, return vias and loop geometry. Verify the actual implementation rather than judging it by distance in a top view.<\/p>\n<h3>Should the common-mode choke go before the diode?<\/h3>\n<p>In TI&#8217;s TUSB121x example it follows the ESD protection. Confirm the sequence in the PHY and protector references and qualify it on the actual board.<\/p>\n<h3>Does a connector shield replace the data-line protector?<\/h3>\n<p>No. Shield bonding and signal-line protection address different paths. Follow the intended chassis and board grounding architecture rather than assuming they are interchangeable.<\/p>\n<h3>Why might the port restart even though no diode failed?<\/h3>\n<p>A transient can disturb the supply, reset path or reference. Capture the symptom and investigate the current route and nearby sensitive circuits before replacing the diode. The <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/pcb-ground-bounce-guide\/\">PCB ground bounce guide<\/a> explains how a changing local reference can show up in a measurement.<\/p>\n<h3>Is a device-level rating proof of system compliance?<\/h3>\n<p>No. The assembled product adds connector, enclosure, layout and grounding variables. Verify it with the applicable system test and performance criteria.<\/p>\n<h3>Does this placement apply unchanged to USB SuperSpeed?<\/h3>\n<p>No. Check the separate transmit and receive paths, channel budget and AC coupling architecture. This guide addresses USB 2.0 D+ and D\u2212.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Sources\"><\/span>Sources<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/www.ti.com\/lit\/an\/slvaf82b\/slvaf82b.pdf\">Texas Instruments: ESD and Surge Protection for USB Interfaces<\/a>; <a href=\"https:\/\/www.ti.com\/lit\/an\/swca124\/swca124.pdf\">Texas Instruments: TUSB121x board guidelines<\/a>; <a href=\"https:\/\/assets.nexperia.com\/documents\/application-note\/AN10753.pdf\">Nexperia: ESD protection for USB 2.0 interfaces<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Project_Review\"><\/span>Project Review<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For a PCB fabrication discussion, send Best Technology the proposed stackup, pair geometry and connector-to-protector region at <a href=\"mailto:sales@bestpcbs.com\">sales@bestpcbs.com<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.<\/p>\n","protected":false},"author":32827,"featured_media":38768,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[174],"tags":[9294,8412,8099,9293],"class_list":["post-38770","post","type-post","status-publish","format-standard","hentry","category-bestpcb","tag-differential-routing","tag-esd-protection","tag-signal-integrity","tag-usb-2-0"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"mingling, gong\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"PCB &amp; MCPCB - EBest PCB - More Technical Details &amp; News on PCB, MCPCB &amp; Ceramic PCB from EBest PCB\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"USB 2.0 ESD Protection: Where to Put the Diode on a PCB\" \/>\n\t\t<meta property=\"og:description\" content=\"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/logo.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/logo.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-11-10T11:33:01+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-11-10T11:34:40+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Bestpcbs1\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:site\" content=\"@bestpcbs\" \/>\n\t\t<meta name=\"twitter:title\" content=\"USB 2.0 ESD Protection: Where to Put the Diode on a PCB\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.\" \/>\n\t\t<meta name=\"twitter:creator\" content=\"@bestpcbs\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2016\/02\/logo.gif\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#blogposting\",\"name\":\"USB 2.0 ESD Protection: Where to Put the Diode on a PCB\",\"headline\":\"USB 2.0 ESD Protection: Where to Put the Diode on a PCB\",\"author\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/author\\\/gong588\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/11\\\/usb-2-0-esd-protection.jpg\",\"width\":1200,\"height\":675},\"datePublished\":\"2026-11-10T19:33:01+08:00\",\"dateModified\":\"2026-11-10T19:34:40+08:00\",\"inLanguage\":\"en-US\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#webpage\"},\"articleSection\":\"bestpcb, Differential Routing, esd protection, Signal Integrity, USB 2.0\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/category\\\/bestpcb\\\/#listItem\",\"name\":\"bestpcb\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/category\\\/bestpcb\\\/#listItem\",\"position\":2,\"name\":\"bestpcb\",\"item\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/category\\\/bestpcb\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#listItem\",\"name\":\"USB 2.0 ESD Protection: Where to Put the Diode on a PCB\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#listItem\",\"position\":3,\"name\":\"USB 2.0 ESD Protection: Where to Put the Diode on a PCB\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/category\\\/bestpcb\\\/#listItem\",\"name\":\"bestpcb\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/#organization\",\"name\":\"PCB & MCPCB - Best Technology\",\"description\":\"More Technical Details & News on PCB, MCPCB & Ceramic PCB from EBest PCB\",\"url\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/\",\"telephone\":\"+8675529091601\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/logo.png\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#organizationLogo\"},\"image\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#organizationLogo\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/Bestpcbs1\",\"https:\\\/\\\/twitter.com\\\/bestpcbs\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCJsTR02i6mtLFnBBNC_i4bQ\\\/featured\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/best-pcb-technology\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/author\\\/gong588\\\/#author\",\"url\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/author\\\/gong588\\\/\",\"name\":\"mingling, gong\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#authorImage\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/37717913504b7ea1df97ec73d58a7bcc?s=96&d=mm&r=g\",\"width\":96,\"height\":96,\"caption\":\"mingling, gong\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#webpage\",\"url\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/\",\"name\":\"USB 2.0 ESD Protection: Where to Put the Diode on a PCB\",\"description\":\"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#breadcrumblist\"},\"author\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/author\\\/gong588\\\/#author\"},\"creator\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/author\\\/gong588\\\/#author\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/11\\\/usb-2-0-esd-protection.jpg\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#mainImage\",\"width\":1200,\"height\":675},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/2026\\\/11\\\/usb-2-0-esd-diode-placement\\\/#mainImage\"},\"datePublished\":\"2026-11-10T19:33:01+08:00\",\"dateModified\":\"2026-11-10T19:34:40+08:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/\",\"name\":\"PCB & MCPCB - Best Technology\",\"description\":\"More Technical Details & News on PCB, MCPCB & Ceramic PCB from EBest PCB\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.bestpcbs.com\\\/blog\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","description":"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.","canonical_url":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BlogPosting","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#blogposting","name":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","headline":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","author":{"@id":"https:\/\/www.bestpcbs.com\/blog\/author\/gong588\/#author"},"publisher":{"@id":"https:\/\/www.bestpcbs.com\/blog\/#organization"},"image":{"@type":"ImageObject","url":"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/usb-2-0-esd-protection.jpg","width":1200,"height":675},"datePublished":"2026-11-10T19:33:01+08:00","dateModified":"2026-11-10T19:34:40+08:00","inLanguage":"en-US","mainEntityOfPage":{"@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#webpage"},"isPartOf":{"@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#webpage"},"articleSection":"bestpcb, Differential Routing, esd protection, Signal Integrity, USB 2.0"},{"@type":"BreadcrumbList","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/www.bestpcbs.com\/blog\/#listItem","position":1,"name":"Home","item":"https:\/\/www.bestpcbs.com\/blog\/","nextItem":{"@type":"ListItem","@id":"https:\/\/www.bestpcbs.com\/blog\/category\/bestpcb\/#listItem","name":"bestpcb"}},{"@type":"ListItem","@id":"https:\/\/www.bestpcbs.com\/blog\/category\/bestpcb\/#listItem","position":2,"name":"bestpcb","item":"https:\/\/www.bestpcbs.com\/blog\/category\/bestpcb\/","nextItem":{"@type":"ListItem","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#listItem","name":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB"},"previousItem":{"@type":"ListItem","@id":"https:\/\/www.bestpcbs.com\/blog\/#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#listItem","position":3,"name":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","previousItem":{"@type":"ListItem","@id":"https:\/\/www.bestpcbs.com\/blog\/category\/bestpcb\/#listItem","name":"bestpcb"}}]},{"@type":"Organization","@id":"https:\/\/www.bestpcbs.com\/blog\/#organization","name":"PCB & MCPCB - Best Technology","description":"More Technical Details & News on PCB, MCPCB & Ceramic PCB from EBest PCB","url":"https:\/\/www.bestpcbs.com\/blog\/","telephone":"+8675529091601","logo":{"@type":"ImageObject","url":"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/logo.png","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#organizationLogo"},"image":{"@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#organizationLogo"},"sameAs":["https:\/\/www.facebook.com\/Bestpcbs1","https:\/\/twitter.com\/bestpcbs","https:\/\/www.youtube.com\/channel\/UCJsTR02i6mtLFnBBNC_i4bQ\/featured","https:\/\/www.linkedin.com\/company\/best-pcb-technology"]},{"@type":"Person","@id":"https:\/\/www.bestpcbs.com\/blog\/author\/gong588\/#author","url":"https:\/\/www.bestpcbs.com\/blog\/author\/gong588\/","name":"mingling, gong","image":{"@type":"ImageObject","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#authorImage","url":"https:\/\/secure.gravatar.com\/avatar\/37717913504b7ea1df97ec73d58a7bcc?s=96&d=mm&r=g","width":96,"height":96,"caption":"mingling, gong"}},{"@type":"WebPage","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#webpage","url":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/","name":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","description":"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/www.bestpcbs.com\/blog\/#website"},"breadcrumb":{"@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#breadcrumblist"},"author":{"@id":"https:\/\/www.bestpcbs.com\/blog\/author\/gong588\/#author"},"creator":{"@id":"https:\/\/www.bestpcbs.com\/blog\/author\/gong588\/#author"},"image":{"@type":"ImageObject","url":"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/usb-2-0-esd-protection.jpg","@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#mainImage","width":1200,"height":675},"primaryImageOfPage":{"@id":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/#mainImage"},"datePublished":"2026-11-10T19:33:01+08:00","dateModified":"2026-11-10T19:34:40+08:00"},{"@type":"WebSite","@id":"https:\/\/www.bestpcbs.com\/blog\/#website","url":"https:\/\/www.bestpcbs.com\/blog\/","name":"PCB & MCPCB - Best Technology","description":"More Technical Details & News on PCB, MCPCB & Ceramic PCB from EBest PCB","inLanguage":"en-US","publisher":{"@id":"https:\/\/www.bestpcbs.com\/blog\/#organization"}}]},"og:locale":"en_US","og:site_name":"PCB &amp; MCPCB - EBest PCB - More Technical Details &amp; News on PCB, MCPCB &amp; Ceramic PCB from EBest PCB","og:type":"article","og:title":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","og:description":"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.","og:url":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/","og:image":"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/logo.png","og:image:secure_url":"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/logo.png","article:published_time":"2026-11-10T11:33:01+00:00","article:modified_time":"2026-11-10T11:34:40+00:00","article:publisher":"https:\/\/www.facebook.com\/Bestpcbs1","twitter:card":"summary_large_image","twitter:site":"@bestpcbs","twitter:title":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","twitter:description":"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.","twitter:creator":"@bestpcbs","twitter:image":"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2016\/02\/logo.gif"},"aioseo_meta_data":{"post_id":"38770","title":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","description":"Place a USB 2.0 ESD diode without creating a long stub. Compare layouts, check the discharge return and verify the link after a board revision.","keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":"","og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":0,"frequency":"default","local_seo":null,"breadcrumb_settings":null,"limit_modified_date":false,"ai":null,"created":"2026-11-10 11:33:02","updated":"2026-11-10 11:48:31","seo_analyzer_scan_date":null,"focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.bestpcbs.com\/blog\/\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">\u00bb<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.bestpcbs.com\/blog\/category\/bestpcb\/\" title=\"bestpcb\">bestpcb<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">\u00bb<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tUSB 2.0 ESD Protection: Where to Put the Diode on a PCB\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/www.bestpcbs.com\/blog\/"},{"label":"bestpcb","link":"https:\/\/www.bestpcbs.com\/blog\/category\/bestpcb\/"},{"label":"USB 2.0 ESD Protection: Where to Put the Diode on a PCB","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/usb-2-0-esd-diode-placement\/"}],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/38770","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/users\/32827"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/comments?post=38770"}],"version-history":[{"count":1,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/38770\/revisions"}],"predecessor-version":[{"id":38771,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/38770\/revisions\/38771"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media\/38768"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=38770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=38770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=38770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}