{"id":4885,"date":"2025-09-26T11:12:00","date_gmt":"2025-09-26T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/difference-between-lan-transformer-and-lan-filter\/"},"modified":"2026-06-22T06:42:28","modified_gmt":"2026-06-22T06:42:28","slug":"difference-between-lan-transformer-and-lan-filter","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/fr\/knowledge-center\/difference-between-lan-transformer-and-lan-filter","title":{"rendered":"Transformateur LAN contre filtre LAN : diff\u00e9rences cl\u00e9s et applications"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/de83035fb7994c1495d5012cef3f0c79.jpg\" alt=\"LAN Transformer vs. LAN Filter\" class=\"wp-image-4881\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/de83035fb7994c1495d5012cef3f0c79.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/de83035fb7994c1495d5012cef3f0c79-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/de83035fb7994c1495d5012cef3f0c79-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/de83035fb7994c1495d5012cef3f0c79-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/de83035fb7994c1495d5012cef3f0c79-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Introduction<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dans la conception Ethernet, les ing\u00e9nieurs rencontrent souvent deux termes&nbsp;: <strong>Transformateur LAN<\/strong> and <strong>Filtre LAN<\/strong>. Ils sont parfois utilis\u00e9s de fa\u00e7on interchangeable, mais en r\u00e9alit\u00e9, ils remplissent des fonctions distinctes. Tous deux constituent des composants essentiels de <strong>Ethernet magnetics<\/strong>, notamment dans <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>Connecteurs magn\u00e9tiques RJ45<\/strong><\/a>, o\u00f9 ils sont fr\u00e9quemment int\u00e9gr\u00e9s dans un seul module. Comprendre leurs diff\u00e9rences aide les ing\u00e9nieurs \u00e0 concevoir des syst\u00e8mes Ethernet plus fiables et conformes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Qu\u2019est-ce qu\u2019un transformateur LAN&nbsp;?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>Transformateur LAN<\/strong>, parfois appel\u00e9 <strong>transformateur Ethernet<\/strong>, est un dispositif d\u2019isolation magn\u00e9tique plac\u00e9 entre le PHY Ethernet (circuit int\u00e9gr\u00e9 de la couche physique) et le c\u00e2ble \u00e0 paires torsad\u00e9es.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Fonctions principales des transformateurs LAN&nbsp;:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Isolation galvanique<\/strong>: Assure une isolation haute tension (couramment 1500 Veff ou plus) afin de prot\u00e9ger les \u00e9quipements et les utilisateurs.<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/glossary\/what-is-signal-coupling-in-electronics\/\"><strong>Le couplage de signaux<\/strong><\/a>: Transf\u00e8re les signaux Ethernet diff\u00e9rentiels \u00e0 travers la barri\u00e8re d\u2019isolation.<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/common-mode-noise-in-ethernet-systems\/\"><strong>Bruit en mode commun<\/strong><\/a><strong> suppression<\/strong>: R\u00e9duit les interf\u00e9rences en rejetant le bruit pr\u00e9sent de fa\u00e7on identique sur les deux lignes de signal.<\/p><\/li><li><p><strong>Conformit\u00e9 aux normes<\/strong>: Indispensable pour satisfaire aux <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\">sp\u00e9cifications Ethernet IEEE 802.3<\/a>.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">En r\u00e9sum\u00e9, les transformateurs LAN sont charg\u00e9s de l\u2019 <strong>isolation, de la s\u00e9curit\u00e9 et du transfert de signal<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Qu\u2019est-ce qu\u2019un filtre LAN&nbsp;?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>Filtre LAN<\/strong> est un circuit filtrant passif \u2014 g\u00e9n\u00e9ralement compos\u00e9 d\u2019inductances et de condensateurs \u2014 int\u00e9gr\u00e9 aux magn\u00e9tiques Ethernet afin d\u2019am\u00e9liorer la qualit\u00e9 du signal.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Fonctions principales du <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/knowledge-center\/network-filter-lan-filter-guide\/\">filtre LAN<\/a>:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Filtrage du bruit<\/strong>: Supprime le bruit haute fr\u00e9quence (EMI\/<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/glossary\/rfi-radio-frequency-interference-causes-effects-solutions\/\">RFI<\/a>).<\/p><\/li><li><p><strong>Am\u00e9lioration de l\u2019int\u00e9grit\u00e9 du signal<\/strong>: R\u00e9duit le jitter et <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/glossary\/crosstalk-definition-causes-types-effects\/\">interf\u00e9rence crois\u00e9e<\/a> les distorsions dans les signaux Ethernet haute vitesse.<\/p><\/li><li><p><strong>Conformit\u00e9 CEM<\/strong>: Aide les appareils \u00e0 respecter les normes r\u00e9glementaires telles que celles de la FCC, du CE et de la CEI.<\/p><\/li><li><p><strong>Stabilit\u00e9 de la distribution d\u2019\u00e9nergie<\/strong>: Dans les applications PoE\/PoE+, les filtres r\u00e9duisent le bruit conduit sur les lignes d\u2019alimentation.<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Alors qu\u2019un transformateur LAN g\u00e8re l\u2019 <strong>isolation et le couplage<\/strong>, le filtre LAN garantit une <strong>transmission de signal propre et fiable<\/strong>.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Transformateur LAN contre filtre LAN&nbsp;: comparaison<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9bc0ea0b406b4061a8e4e7cd14cf4f1c.png\" alt=\"LAN Transformer vs LAN Filter\" class=\"wp-image-4882\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9bc0ea0b406b4061a8e4e7cd14cf4f1c.png 1536w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9bc0ea0b406b4061a8e4e7cd14cf4f1c-300x200.png 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9bc0ea0b406b4061a8e4e7cd14cf4f1c-1024x683.png 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9bc0ea0b406b4061a8e4e7cd14cf4f1c-768x512.png 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9bc0ea0b406b4061a8e4e7cd14cf4f1c-18x12.png 18w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 175px;\"\/><col style=\"width: 251px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"175\"><p>Fonctionnalit\u00e9<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"251\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/443541.htm\">Transformateur LAN<\/a><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Filtre LAN<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"175\"><p><strong>Objectif principal<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"251\"><p>Assure l\u2019isolement galvanique et couple les signaux Ethernet<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Filtre les bruits EMI\/RFI et am\u00e9liore la qualit\u00e9 du signal<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"175\"><p><strong>Structure principale<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"251\"><p>Bobinages magn\u00e9tiques (transformateur)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>R\u00e9seau de filtrage inductance-condensateur<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"175\"><p><strong>R\u00f4le dans les normes<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"251\"><p>Garantit les exigences d\u2019isolement \u00e9lectrique de la norme IEEE 802.3<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Contribue \u00e0 la conformit\u00e9 CEM\/EMI<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"175\"><p><strong>Emplacement dans le circuit<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"251\"><p>Entre le circuit int\u00e9gr\u00e9 PHY et le c\u00e2ble Ethernet<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Souvent int\u00e9gr\u00e9s aux c\u00f4t\u00e9s du transformateur dans les modules RJ45<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"175\"><p><strong>D\u00e9pendance<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"251\"><p>Toujours requis pour Ethernet<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Compl\u00e9mentaires, am\u00e9liorent les performances mais ne sont pas autonomes<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 Ensemble, ils garantissent <strong>une transmission Ethernet s\u00fbre, conforme et stable<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Pourquoi sont-ils int\u00e9gr\u00e9s ensemble ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Moderne <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>Connecteurs magn\u00e9tiques RJ45<\/strong><\/a> combinent les transformateurs LAN et les filtres LAN en un module compact. Cette int\u00e9gration :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u00c9conomise de l\u2019espace sur la carte de circuit imprim\u00e9 (PCB)<\/p><\/li><li><p>Simplifie la conception Ethernet<\/p><\/li><li><p>Am\u00e9liore <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/knowledge-center\/emc-ems-emi-electromagnetic-compatibility-susceptibility-interference\/\">la compatibilit\u00e9 \u00e9lectromagn\u00e9tique (CEM) et la compatibilit\u00e9 aux interf\u00e9rences \u00e9lectromagn\u00e9tiques (EMI)<\/a> performances<\/p><\/li><li><p>Fournit une solution \u00ab pr\u00eate \u00e0 l\u2019emploi \u00bb pour les fabricants d\u2019\u00e9quipements d\u2019origine (OEM)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Une telle int\u00e9gration est particuli\u00e8rement importante dans les domaines de <strong>l\u2019Ethernet Gigabit, de l\u2019alimentation par Ethernet (PoE), des r\u00e9seaux industriels et de l\u2019Ethernet automobile<\/strong>, o\u00f9 l\u2019int\u00e9grit\u00e9 du signal et la fiabilit\u00e9 sont critiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Magn\u00e9tiques LAN LINK-PP : solutions combinant transformateur et filtre<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/47bdefef08e44fb5bcd8eae97467e444.webp\" alt=\"RJ45 magnetic connectors\" class=\"wp-image-4883\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/47bdefef08e44fb5bcd8eae97467e444.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/47bdefef08e44fb5bcd8eae97467e444-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/47bdefef08e44fb5bcd8eae97467e444-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/47bdefef08e44fb5bcd8eae97467e444-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/47bdefef08e44fb5bcd8eae97467e444-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">At <strong>LIEN-PP<\/strong>, nous concevons et fabriquons <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473980.htm\"><strong>Connecteurs magn\u00e9tiques RJ45<\/strong><\/a> and <strong>Ethernet magnetics<\/strong> qui int\u00e8grent les deux fonctions <strong>de transformateurs LAN et de filtres LAN<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nos solutions sont :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Enti\u00e8rement conformes \u00e0 la norme IEEE 802.3<\/strong> normes<\/p><\/li><li><p>Disponibles pour <strong>les d\u00e9bits 10\/100 Mbps, Gigabit et 10 G Ethernet<\/strong><\/p><\/li><li><p>Optimis\u00e9 pour <strong>les applications PoE\/PoE+<\/strong><\/p><\/li><li><p>Con\u00e7ues pour r\u00e9duire les interf\u00e9rences \u00e9lectromagn\u00e9tiques (EMI) et assurer la fiabilit\u00e9 r\u00e9seau \u00e0 long terme<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Faites confiance par des OEM mondiaux, les produits LINK-PP offrent l\u2019 <strong>isolation, le filtrage et l\u2019int\u00e9grit\u00e9 du signal<\/strong> exig\u00e9s par les syst\u00e8mes Ethernet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bien que la <strong>Transformateur LAN<\/strong> and <strong>Filtre LAN<\/strong> remplissent des fonctions diff\u00e9rentes, mais se compl\u00e8tent dans la conception Ethernet. Le transformateur assure <strong>l\u2019isolation et le transfert du signal<\/strong>, tandis que le filtre am\u00e9liore <strong>l\u2019int\u00e9grit\u00e9 du signal et la conformit\u00e9 CEM<\/strong>. En pratique, ils sont souvent int\u00e9gr\u00e9s dans un seul <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/486085.htm\"><strong>RJ45 magjack<\/strong><\/a> module afin de simplifier la conception et garantir les performances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour des magn\u00e9tiques Ethernet de haute qualit\u00e9, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\"><strong>LIEN-PP<\/strong><\/a><strong> propose des solutions combinant transformateur et filtre<\/strong> permettant aux ing\u00e9nieurs de concevoir des r\u00e9seaux fiables et conformes aux normes.<\/p>","protected":false},"excerpt":{"rendered":"<p>Comprenez la diff\u00e9rence entre un transformateur LAN et un filtre LAN. D\u00e9couvrez comment les deux fonctionnent conjointement dans les connecteurs magn\u00e9tiques RJ45 pour assurer l\u2019int\u00e9grit\u00e9 du signal Ethernet et la conformit\u00e9 CEM.<\/p>","protected":false},"author":1,"featured_media":4884,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22,23],"class_list":["post-4885","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors","tag-link-pp-lan-transformers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts\/4885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/comments?post=4885"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts\/4885\/revisions"}],"predecessor-version":[{"id":11066,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts\/4885\/revisions\/11066"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/media\/4884"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/media?parent=4885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/categories?post=4885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/tags?post=4885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}