{"id":20343,"date":"2026-04-30T19:54:43","date_gmt":"2026-04-30T11:54:43","guid":{"rendered":"https:\/\/lorentzzi.com\/?p=20343"},"modified":"2026-04-30T20:20:07","modified_gmt":"2026-04-30T12:20:07","slug":"how-to-select-the-right-fast-acting-fuses-for-your-solid-state-relays","status":"publish","type":"post","link":"https:\/\/lorentzzi.com\/fr\/how-to-select-the-right-fast-acting-fuses-for-your-solid-state-relays\/","title":{"rendered":"Comment s\u00e9lectionner les fusibles \u00e0 action rapide appropri\u00e9s pour vos relais statiques ?"},"content":{"rendered":"
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Lors de l'utilisation de <\/span>relais \u00e0 semi-conducteurs<\/span><\/a><\/span>, bon <\/span>dissipation de la chaleur<\/span><\/a><\/span> est cruciale, et l'utilisation de fusibles \u00e0 action rapide est tout aussi importante.<\/span><\/p>

Un fusible appropri\u00e9 \u00e0 action rapide peut prot\u00e9ger les relais statiques monophas\u00e9s ou triphas\u00e9s contre les dommages caus\u00e9s par une surintensit\u00e9 ou un court-circuit dans le circuit contr\u00f4l\u00e9.<\/span><\/p>

Dans cet article de blog, vous apprendrez :<\/span><\/p>

  1. Qu'est-ce qu'un fusible \u00e0 action rapide ?<\/span><\/li>
  2. Pourquoi votre relais statique a-t-il besoin d'un fusible \u00e0 action rapide ?<\/span><\/li>
  3. Diff\u00e9rents types de fusibles \u00e0 action rapide.<\/span><\/li>
  4. Comment choisir le fusible \u00e0 action rapide le mieux adapt\u00e9 \u00e0 votre relais statique ?<\/span><\/li><\/ol>

    Maintenant, passons \u00e0 l'action !<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Qu'est-ce qu'un fusible \u00e0 action rapide ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Fusibles\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Un fusible \u00e0 action rapide est un dispositif de protection de circuit \u00e0 action unique, compos\u00e9 principalement d'un \u00e9l\u00e9ment fusible et d'un bo\u00eetier isolant.<\/span><\/p>

    Parmi ces composants, l'\u00e9l\u00e9ment fusible est g\u00e9n\u00e9ralement constitu\u00e9 d'argent de haute puret\u00e9, d'un alliage d'argent ou d'une fine feuille de cuivre avec un col \u00e9troit. Le bo\u00eetier isolant est principalement constitu\u00e9 de c\u00e9ramique \u00e0 haute r\u00e9sistance, offrant une r\u00e9sistance \u00e9lev\u00e9e \u00e0 la tension et des performances fiables en mati\u00e8re de suppression d'arc.<\/span><\/p>

    Lorsqu'un courant de surcharge ou de court-circuit d\u00e9passe sa valeur nominale, l'\u00e9l\u00e9ment fusible fond instantan\u00e9ment en raison de la surchauffe, d\u00e9connectant rapidement le circuit et prot\u00e9geant les semi-conducteurs et les \u00e9quipements \u00e9lectriques industriels.<\/span><\/p>

    Il se caract\u00e9rise par un temps de r\u00e9ponse ultra-rapide, avec un temps de fusion de quelques millisecondes seulement.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Pourquoi avez-vous besoin d'un fusible \u00e0 action rapide pour votre relais statique ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Les relais \u00e0 semi-conducteurs peuvent \u00eatre divis\u00e9s en deux cat\u00e9gories principales : <\/span>Relais \u00e0 semi-conducteurs DC (SSR DC) et relais \u00e0 semi-conducteurs AC (SSR AC)<\/span><\/a><\/span>. Ils utilisent tous deux des semi-conducteurs (le relais statique \u00e0 courant alternatif utilise un thyristor, le relais statique \u00e0 courant continu utilise un Mosfet) comme \u00e9l\u00e9ments de commande pour connecter ou d\u00e9connecter les charges.<\/span><\/p>

    En consultant leurs fiches techniques ITSM ou IDM, vous constaterez que la plupart des thyristors sont pr\u00e9vus pour moins de 400 A@20 ms (voir la valeur ITSM pour le triac BTA41 dans l'image ci-dessous), tandis que les MOSFET sont pr\u00e9vus pour environ 1 000 A. Si le circuit est court-circuit\u00e9, le courant peut facilement atteindre des milliers d'amp\u00e8res, ce qui peut facilement griller l'unit\u00e9 de contr\u00f4le.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"BTA41\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Par cons\u00e9quent, pour \u00e9viter les dommages dus \u00e0 une surintensit\u00e9, la solution consiste \u00e0 utiliser un fusible \u00e0 action rapide, qui peut couper le circuit en moins de 10 millisecondes, soit beaucoup plus rapidement que le temps de fusible de 20 millisecondes de l'unit\u00e9 de contr\u00f4le. Cela signifie que le fusible \u00e0 action rapide a d\u00e9j\u00e0 coup\u00e9 l'alimentation de l'unit\u00e9 de contr\u00f4le avant qu'elle ne soit endommag\u00e9e.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Diff\u00e9rents types de fusibles \u00e0 action rapide<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Pour s\u00e9lectionner le fusible \u00e0 action rapide le mieux adapt\u00e9 \u00e0 un relais statique, il est n\u00e9cessaire de comprendre ses classifications courantes.<\/span><\/p>

    En fonction des caract\u00e9ristiques de rupture, les fusibles \u00e0 action rapide sont principalement divis\u00e9s en trois types : aR, gR et gG\/gM.<\/span><\/p>

    Les deux types aR et gR se caract\u00e9risent par une vitesse de rupture ultra-rapide, avec un temps de rupture inf\u00e9rieur \u00e0 10 millisecondes. La diff\u00e9rence est que le fusible aR est con\u00e7u uniquement pour la protection contre les courts-circuits des dispositifs \u00e0 semi-conducteurs, tandis que le fusible gR assure \u00e0 la fois la protection contre les surcharges et les courts-circuits.<\/span><\/p>

    Quant aux fusibles \u00e0 action rapide de type gG et gM, leur vitesse de fusion est g\u00e9n\u00e9ralement plus lente que celle des fusibles \u00e0 action rapide de type aR et gR dont il a \u00e9t\u00e9 question plus haut. En g\u00e9n\u00e9ral, le temps de fusion est d'environ 0,1 \u00e0 5 secondes.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Comment s\u00e9lectionner les fusibles \u00e0 action rapide appropri\u00e9s pour vos relais statiques ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Comme indiqu\u00e9 ci-dessus, les relais \u00e0 semi-conducteurs ne peuvent r\u00e9sister qu'\u00e0 des surintensit\u00e9s inf\u00e9rieures \u00e0 20 millisecondes. Si le circuit est interrompu dans ce laps de temps, le thyristor ou le MOSFET interne est effectivement prot\u00e9g\u00e9 contre la surchauffe.<\/span><\/p>

    En revanche, le temps de fusion des fusibles \u00e0 action rapide de type aR et de type gR est inf\u00e9rieur \u00e0 10 millisecondes, soit bien moins que la limite de r\u00e9sistance de 20 millisecondes des relais statiques. Par cons\u00e9quent, ces deux types de fusibles peuvent fournir une protection fiable aux relais statiques.<\/span><\/p>

    D'un autre point de vue, celui du courant, comment choisir le bon fusible \u00e0 action rapide pour un relais statique (SSR) ? Dans la section suivante, nous vous expliquons comment proc\u00e9der, \u00e9tape par \u00e9tape.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    1. V\u00e9rifier le courant maximum support\u00e9 par le relais statique<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Il existe trois types de relais \u00e0 semi-conducteurs : relais monophas\u00e9s \u00e0 semi-conducteurs<\/a><\/span>, relais triphas\u00e9s \u00e0 semi-conducteurs<\/a><\/span>et r\u00e9gulateurs de tension \u00e0 semi-conducteurs<\/a><\/span>. Le fournisseur indique g\u00e9n\u00e9ralement le courant de sortie maximal qu'il peut supporter dans la section de charge ; veuillez y pr\u00eater une attention particuli\u00e8re.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    2. Confirmer que la tension de la charge est alternative ou continue<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    En outre, v\u00e9rifiez si votre relais statique est utilis\u00e9 pour contr\u00f4ler une charge en courant continu ou en courant alternatif. Les relais statiques \u00e0 courant continu n\u00e9cessitent des fusibles \u00e0 action rapide en courant continu pour la protection, tandis que les relais statiques \u00e0 courant alternatif n\u00e9cessitent des fusibles \u00e0 action rapide en courant alternatif.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    3. S\u00e9lectionner le bon type de fusible<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Les relais \u00e0 semi-conducteurs \u00e9tant des interrupteurs \u00e0 semi-conducteurs, leur temps de r\u00e9ponse est plus rapide que celui des interrupteurs m\u00e9caniques ordinaires. Par cons\u00e9quent, le temps de fusion du fusible \u00e0 action rapide doit \u00eatre plus rapide que son temps de r\u00e9ponse et son temps de d\u00e9faillance. Vous devez donc utiliser les fusibles \u00e0 action rapide de type aR et gR mentionn\u00e9s plus haut.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    4. Choisissez un fusible \u00e0 action rapide avec un courant nominal appropri\u00e9 : <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Si la charge est une charge r\u00e9sistive (comme un \u00e9l\u00e9ment chauffant), le courant nominal du fusible \u00e0 action rapide doit \u00eatre 1,5 fois le courant nominal du relais statique ; si la charge contr\u00f4l\u00e9e est un moteur, un fusible \u00e0 action rapide avec un courant nominal de 2 \u00e0 2,5 fois le courant nominal du relais statique doit \u00eatre s\u00e9lectionn\u00e9 pour r\u00e9sister au courant de choc important lorsque le moteur d\u00e9marre.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Comment raccorder un fusible \u00e0 action rapide \u00e0 un relais statique ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Apr\u00e8s avoir s\u00e9lectionn\u00e9 un fusible \u00e0 action rapide appropri\u00e9 conform\u00e9ment aux directives ci-dessus, l'\u00e9tape suivante consiste \u00e0 c\u00e2bler correctement le relais statique.<\/span><\/p>

    Le fusible \u00e0 action rapide est principalement utilis\u00e9 pour prot\u00e9ger les dispositifs de puissance internes du relais statique, tels que les thyristors ou les MOSFET. Il doit \u00eatre connect\u00e9 en s\u00e9rie avec le relais statique et la charge. En cas de court-circuit de la charge ou de d\u00e9faut de surcharge, le fusible \u00e0 action rapide peut imm\u00e9diatement couper l'alimentation pour prot\u00e9ger le relais statique.<\/span><\/p>

    Dans les images suivantes, nous vous montrons comment raccorder les fusibles \u00e0 action rapide \u00e0 diff\u00e9rents types de relais \u00e0 semi-conducteurs :<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Sch\u00e9ma\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    En r\u00e9sum\u00e9, les fusibles \u00e0 action rapide sont des composants auxiliaires indispensables dans les applications de relais statiques. Ils prot\u00e8gent non seulement la charge contre les dommages caus\u00e9s par les courts-circuits, mais aussi les dispositifs semi-conducteurs internes du relais statique contre l'\u00e9puisement en cas de d\u00e9faillance.<\/span><\/p>

    Si vous souhaitez en savoir plus sur les relais \u00e0 semi-conducteurs ou obtenir nos recommandations sur les fusibles \u00e0 action rapide les plus appropri\u00e9s, veuillez envoyer vos questions \u00e0 l'adresse suivante <\/span>shonxu@lorentzzi.com<\/span><\/span><\/a><\/span>et <\/span>Lorentzzi Electric<\/span><\/a><\/span>\u2018vous apporteront une solution dans les plus brefs d\u00e9lais.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

    When using solid-state relays, good heat dissipation is crucial, and the use of fast-acting fuses is equally important. A suitable fast-acting fuse can protect single-phase or three-phase solid-state relays from damage caused by overcurrent or short circuits in the controlled circuit. In this blog post, you will learn: What is a fast-acting fuse? Why does […]<\/p>\n","protected":false},"author":1,"featured_media":20346,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[109],"tags":[],"class_list":["post-20343","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solid-state-relay"],"yoast_head":"\nHow to Select the Right Fast-Acting Fuses for Your Solid-State Relays?<\/title>\n<meta name=\"description\" content=\"In this blog post, we will teach you how to select the right fast-acting fuses for your solid state relays, click to see more now!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lorentzzi.com\/fr\/how-to-select-the-right-fast-acting-fuses-for-your-solid-state-relays\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" 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