{"id":5729,"date":"2025-07-18T00:00:00","date_gmt":"2025-07-18T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/shielded-vs-unshielded-rj45-connectors\/"},"modified":"2026-06-22T08:57:31","modified_gmt":"2026-06-22T08:57:31","slug":"shielded-vs-unshielded-rj45-connectors","status":"publish","type":"post","link":"https:\/\/resources.l-p.com\/ja\/knowledge-center\/shielded-vs-unshielded-rj45-connectors","title":{"rendered":"Shielded vs. Unshielded RJ45 Connectors: What\u2019s the Difference?"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/31a6b4d7bcd74ef5bb88d89abc61f310.webp\" alt=\"Shielded vs. Unshielded RJ45 Connectors\" class=\"wp-image-5727\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/31a6b4d7bcd74ef5bb88d89abc61f310.webp 1200w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/31a6b4d7bcd74ef5bb88d89abc61f310-300x178.webp 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/31a6b4d7bcd74ef5bb88d89abc61f310-1024x608.webp 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/31a6b4d7bcd74ef5bb88d89abc61f310-768x456.webp 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/31a6b4d7bcd74ef5bb88d89abc61f310-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">RJ45 connectors are a critical component in Ethernet networking, widely used to connect computers, routers, switches, and other devices. When choosing the right RJ45 connector (this article focuses on PCB-mount RJ45 connectors ) one key decision is whether to use <strong>shielded<\/strong> \u307e\u305f\u306f\u3001 <strong>unshielded<\/strong> versions. This choice affects electromagnetic performance, mechanical design, and the connector&#8217;s suitability for various application environments..<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Are Shielded RJ45 Connectors?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm?ca=199&amp;cv=1172\">Shielded RJ45 connectors<\/a> incorporate a <strong>metal shield<\/strong> \u307e\u305f\u306f\u3001 <strong>grounding shell<\/strong> around the plastic housing of the connector. This shield serves two primary purposes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Reduce Electromagnetic Interference (EMI)<\/strong> from external sources<\/p><\/li>\n\n\n\n<li><p><strong>Contain Radiated Emissions<\/strong> from within the device<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Shielded connectors are typically used with <strong>STP\/FTP Ethernet cables<\/strong> and must be properly grounded through the PCB or chassis to be effective.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Examples of Shielded RJ45 Jacks:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/486085.htm\" target=\"_blank\" rel=\"\"><strong>LPJG47047A4NL<\/strong><\/a> \u2013 2&#215;4 Shielded RJ45 Magnetic Jacks Support PoE+ <\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/474436.htm\" target=\"_blank\" rel=\"\"><strong>LPJ16264A28NL<\/strong><\/a> \u2013 8P8C RJ45 PCB Jack With Shield EMI Tabs<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/474344.htm\" target=\"_blank\" rel=\"\"><strong>LPJ16258AENL<\/strong><\/a> \u2013 10\/100 Base-T PoE RJ45 Connector with Integrated Magnetics<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What Are Unshielded RJ45 Connectors?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/buy-unshielded.htm\">Unshielded RJ45 connectors<\/a> do <strong>not include any metal shield<\/strong> on the outer shell. They are fully enclosed in plastic, making them lighter, easier to install, and more cost-effective. These connectors are typically used with <strong>UTP cables<\/strong> in low-interference environments such as home routers, consumer electronics, or office equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Despite lacking shielding, <strong>unshielded RJ45 connectors can still include integrated magnetics and LED indicators<\/strong>, enabling them to meet the electrical requirements of Ethernet standards like 10\/100\/1000Base-T.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Examples of Unshielded RJ45 Jacks:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/471100.htm\" target=\"_blank\" rel=\"\"><strong>LPJ0012NNL<\/strong><\/a> \u2013 1&#215;1 Port Unshielded RJ45 Jack Tab Down<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/460427.htm\" target=\"_blank\" rel=\"\"><strong>LPJE180NNL<\/strong><\/a> \u2013 RJ45 Modular Jack without Magnetics and LED<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/469435.htm\" target=\"_blank\" rel=\"\"><strong>LPJE101NNL<\/strong><\/a> \u2013 Compact unshielded 8P8C Jack Tab UP<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Key Differences Between Shielded and Unshielded RJ45 Connectors<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"608\" src=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/36a0bfca67e749f7ac27f63ca73cca65-1024x608.webp\" alt=\"Key Differences Between Shielded and Unshielded RJ45 Connectors\" class=\"wp-image-5728\" srcset=\"https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/36a0bfca67e749f7ac27f63ca73cca65-1024x608.webp 1024w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/36a0bfca67e749f7ac27f63ca73cca65-300x178.webp 300w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/36a0bfca67e749f7ac27f63ca73cca65-768x456.webp 768w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/36a0bfca67e749f7ac27f63ca73cca65-18x12.webp 18w, https:\/\/resources.l-p.com\/wp-content\/uploads\/2026\/05\/36a0bfca67e749f7ac27f63ca73cca65.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>\u6a5f\u80fd<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Shielded RJ45 Connectors<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Unshielded RJ45 Connectors<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>EMI\/RFI Protection<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>&#x2705; High<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>&#x274c; Low<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>External Housing<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Metal shielded<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Full plastic<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Signal Integrity in Harsh Environments<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u5341\u5206\u826f\u597d<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u57fa\u672c\u7684<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u3001WDM\u3001\u901a\u4fe1\u7db2<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u9ad8\u3044<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u4f4e\u3044<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Typical Cable Type<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>STP \/ FTP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>UTP<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Grounding Required<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u306f\u3044<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u3044\u3044\u3048<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u7528\u9014\u4f8b<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Industrial, PoE switches, medical, telecom<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Home gateways, printers, consumer electronics<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Choose Between Shielded and Unshielded RJ45<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When selecting an RJ45 connector for your PCB, consider the following:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 Choose <strong>\u30b7\u30fc\u30eb\u30c9\u4ed8\u304dRJ45<\/strong> \u6b21\u306e\u5834\u5408\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Device is used in <a href=\"https:\/\/resources.l-p.com\/ja\/glossary\/what-is-electromagnetic-interference\/\" target=\"_blank\" rel=\"\"><strong>EMI<\/strong><\/a><strong>-sensitive environments<\/strong> (factories, data centers, power systems)<\/p><\/li>\n\n\n\n<li><p>You are designing for <a href=\"https:\/\/resources.l-p.com\/ja\/knowledge-center\/faqs-link-pp-poe-rj45-connector\/\" target=\"_blank\" rel=\"\"><strong>\u30d1\u30ef\u30fc\u30aa\u30fc\u30d0\u30fc\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\uff08PoE\uff09<\/strong><\/a><strong> (PoE\/PoE+)<\/strong><\/p><\/li>\n\n\n\n<li><p>The product will be installed near <strong>high-frequency equipment<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 Choose <strong>Unshielded RJ45<\/strong> Modular Jack when:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u30b3\u30b9\u30c8\u6700\u9069\u5316\u304c\u512a\u5148\u4e8b\u9805\u3067\u3042\u308b\u5834\u5408<\/p><\/li>\n\n\n\n<li><p>The environment is <strong>low in EMI\/RFI<\/strong><\/p><\/li>\n\n\n\n<li><p>Ease of assembly and <strong>simplified PCB layout<\/strong> is desired<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Application Scenarios<\/h2>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 237px;\"\/><col style=\"width: 212px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"237\"><p>\u696d\u754c<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"212\"><p>Recommended Type<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u7406\u7531<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"237\"><p>\u7523\u696d\u30aa\u30fc\u30c8\u30e1\u30fc\u30b7\u30e7\u30f3<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"212\"><p>Shielded<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Strong EMI resistance needed<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"237\"><p>\u6d88\u8cbb\u8005\u5411\u3051\u96fb\u5b50\u6a5f\u5668<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"212\"><p>Unshielded<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lightweight, cost-effective<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"237\"><p>Telecom \/ PoE Switches<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"212\"><p>Shielded<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Power and signal stability<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"237\"><p>Office Networking<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"212\"><p>Unshielded<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Quiet EMI environment<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"237\"><p>\u533b\u7642\u6a5f\u5668<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"212\"><p>Shielded<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Signal integrity is critical<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u7d50\u8ad6<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u3061\u3089\u3082\u3001 <strong>shielded<\/strong> \u304a\u3088\u3073 <strong>unshielded RJ45 connectors<\/strong> have their roles in modern Ethernet networking. The decision depends on EMI environment, device application, cost constraints, and assembly design. When building reliable, standards-compliant Ethernet ports into your hardware, be sure to match the connector\u2019s shielding level with your real-world application requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you&#8217;re designing a compact consumer device or an industrial-grade switch, the right <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">RJ45\u30b3\u30cd\u30af\u30bf<\/a> is a critical choice for long-term performance and compliance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd0e Frequently Asked Questions (FAQ)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q1: Can an unshielded RJ45 connector include magnetics and LEDs?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A\uff1a<\/strong> Yes. Unshielded RJ45 connectors can fully integrate magnetics (such as isolation transformers and common-mode chokes) and LED indicators. The absence of shielding only affects EMI performance, not functionality.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q2: Is shielding required for Ethernet compliance?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A\uff1a<\/strong> No. Ethernet standards like IEEE 802.3 do not mandate shielding. However, shielding is recommended in high-EMI environments to maintain signal integrity and reduce emissions.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q3: Will using a shielded RJ45 with unshielded cable cause problems?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A\uff1a<\/strong> It may reduce the effectiveness of the shield. For optimal EMI performance, the connector and cable should both be shielded and properly grounded.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q4: Do shielded RJ45 connectors require a PCB ground connection?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A\uff1a<\/strong> Yes. The metal shell of a shielded RJ45 must be electrically connected to the PCB ground plane or chassis to provide EMI protection. Without grounding, the shield is ineffective.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q5: What are the signs that I need a shielded RJ45 instead of unshielded?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A\uff1a<\/strong> Consider a shielded RJ45 if:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Your product operates in environments with motors, RF transmitters, or power supplies<\/p><\/li>\n\n\n\n<li><p>You\u2019ve experienced EMI-related performance issues<\/p><\/li>\n\n\n\n<li><p>Your device needs to meet stringent EMC (Electromagnetic Compatibility) regulations<\/p><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q6: How do I identify if a connector is shielded or unshielded?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A\uff1a<\/strong> Visual inspection can help:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Shielded RJ45s<\/strong> have a metal shell around the port, often silver in color, and may include grounding tabs.<\/p><\/li>\n\n\n\n<li><p><strong>Unshielded RJ45s<\/strong> are typically all-plastic and do not have any metal shell.<\/p><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Shielded vs. unshielded RJ45 connectors: Compare protection, cost, and best uses to choose the right RJ45 connectors for your network environment.<\/p>","protected":false},"author":1,"featured_media":5727,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22,25],"class_list":["post-5729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors","tag-modular-jack"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/posts\/5729","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/comments?post=5729"}],"version-history":[{"count":4,"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/posts\/5729\/revisions"}],"predecessor-version":[{"id":11327,"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/posts\/5729\/revisions\/11327"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/media\/5727"}],"wp:attachment":[{"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/media?parent=5729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/categories?post=5729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resources.l-p.com\/ja\/wp-json\/wp\/v2\/tags?post=5729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}