{"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\/pt\/how-to-select-the-right-fast-acting-fuses-for-your-solid-state-relays\/","title":{"rendered":"Como selecionar os fus\u00edveis de a\u00e7\u00e3o r\u00e1pida certos para seus rel\u00e9s de estado s\u00f3lido?"},"content":{"rendered":"
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Ao usar <\/span>rel\u00e9s de estado s\u00f3lido<\/span><\/a><\/span>, bom <\/span>dissipa\u00e7\u00e3o de calor<\/span><\/a><\/span> \u00e9 fundamental, e o uso de fus\u00edveis de a\u00e7\u00e3o r\u00e1pida \u00e9 igualmente importante.<\/span><\/p>

Um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida adequado pode proteger os rel\u00e9s de estado s\u00f3lido monof\u00e1sicos ou trif\u00e1sicos contra danos causados por sobrecorrente ou curto-circuito no circuito controlado.<\/span><\/p>

Nesta postagem do blog, voc\u00ea aprender\u00e1:<\/span><\/p>

  1. O que \u00e9 um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida?<\/span><\/li>
  2. Por que seu rel\u00e9 de estado s\u00f3lido precisa de um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida?<\/span><\/li>
  3. Diferentes tipos de fus\u00edveis de a\u00e7\u00e3o r\u00e1pida.<\/span><\/li>
  4. Como escolher o fus\u00edvel de a\u00e7\u00e3o r\u00e1pida mais adequado para seu rel\u00e9 de estado s\u00f3lido?<\/span><\/li><\/ol>

    Agora vamos fazer isso acontecer!<\/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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    O que \u00e9 um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida?<\/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\"Fus\u00edveis\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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    Um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida \u00e9 um dispositivo de prote\u00e7\u00e3o de circuito \u00fanico que consiste principalmente em um elemento fus\u00edvel, um inv\u00f3lucro isolante.<\/span><\/p>

    Entre esses componentes, o elemento fus\u00edvel \u00e9 normalmente feito de prata de alta pureza, liga de prata ou uma fina folha de cobre com um design de pesco\u00e7o estreito. O inv\u00f3lucro isolante \u00e9 constru\u00eddo principalmente de cer\u00e2mica de alta resist\u00eancia, oferecendo resist\u00eancia \u00e0 alta tens\u00e3o e desempenho confi\u00e1vel de supress\u00e3o de arco.<\/span><\/p>

    Quando uma corrente de sobrecarga ou curto-circuito excede seu valor nominal, o elemento fus\u00edvel derrete instantaneamente devido ao superaquecimento, desconectando rapidamente o circuito e protegendo os equipamentos el\u00e9tricos industriais e semicondutores.<\/span><\/p>

    Ele apresenta um tempo de resposta ultrarr\u00e1pido, com um tempo de fus\u00e3o de apenas milissegundos.<\/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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    Por que voc\u00ea precisa de um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida para seu rel\u00e9 de estado s\u00f3lido?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Os rel\u00e9s de estado s\u00f3lido podem ser divididos em duas categorias principais: <\/span>Rel\u00e9s de estado s\u00f3lido CC (SSRs CC) e rel\u00e9s de estado s\u00f3lido CA (SSRs CA)<\/span><\/a><\/span>. Ambos usam semicondutores (o SSR CA usa tiristores e o SSR CC usa Mosfet) como elementos de controle para conectar ou desconectar cargas.<\/span><\/p>

    Consultando suas folhas de dados ITSM ou IDM, voc\u00ea ver\u00e1 que a maioria dos tiristores \u00e9 classificada para menos de 400A@20 ms (veja o valor ITSM para o triac BTA41 na imagem abaixo), enquanto os MOSFETs s\u00e3o classificados para aproximadamente 1000A. Se o circuito sofrer um curto-circuito, a corrente pode facilmente atingir milhares de amperes, o que pode facilmente queimar a unidade de controle.<\/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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    Portanto, para evitar danos por sobrecorrente, a solu\u00e7\u00e3o \u00e9 usar um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida, que pode cortar o circuito em menos de 10 milissegundos, muito mais r\u00e1pido do que o tempo de fus\u00edvel de 20 milissegundos da unidade de controle. Isso significa que o fus\u00edvel de a\u00e7\u00e3o r\u00e1pida j\u00e1 cortou a energia da unidade de controle antes que ela fosse danificada.<\/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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    Diferentes tipos de fus\u00edveis de a\u00e7\u00e3o r\u00e1pida<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Para selecionar o fus\u00edvel de a\u00e7\u00e3o r\u00e1pida mais adequado para um rel\u00e9 de estado s\u00f3lido, \u00e9 necess\u00e1rio entender suas classifica\u00e7\u00f5es comuns.<\/span><\/p>

    De acordo com as caracter\u00edsticas de ruptura, os fus\u00edveis de a\u00e7\u00e3o r\u00e1pida s\u00e3o divididos principalmente em tr\u00eas tipos: aR, gR e gG\/gM.<\/span><\/p>

    A diferen\u00e7a \u00e9 que o fus\u00edvel aR foi projetado exclusivamente para a prote\u00e7\u00e3o contra curto-circuito de dispositivos semicondutores, enquanto o fus\u00edvel gR oferece prote\u00e7\u00e3o contra sobrecarga e curto-circuito.<\/span><\/p>

    Quanto aos fus\u00edveis de sopro r\u00e1pido dos tipos gG e gM, sua velocidade de fus\u00e3o \u00e9 geralmente mais lenta do que a dos fus\u00edveis de sopro r\u00e1pido dos tipos aR e gR discutidos anteriormente. Normalmente, o tempo de fus\u00e3o \u00e9 de aproximadamente 0,1 a 5 segundos.<\/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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    Como selecionar os fus\u00edveis de a\u00e7\u00e3o r\u00e1pida certos para seus rel\u00e9s de estado s\u00f3lido?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Como mencionado acima, os rel\u00e9s de estado s\u00f3lido s\u00f3 podem suportar correntes de surto de menos de 20 milissegundos. Se o circuito for interrompido dentro desse intervalo de tempo, o tiristor interno ou o MOSFET estar\u00e1 efetivamente protegido contra a queima.<\/span><\/p>

    Por outro lado, o tempo de fus\u00e3o dos fus\u00edveis de a\u00e7\u00e3o r\u00e1pida tipo aR e tipo gR \u00e9 inferior a 10 milissegundos, muito menor do que o limite de resist\u00eancia de 20 milissegundos dos rel\u00e9s de estado s\u00f3lido. Portanto, esses dois tipos de fus\u00edveis podem fornecer prote\u00e7\u00e3o confi\u00e1vel para rel\u00e9s de estado s\u00f3lido.<\/span><\/p>

    De outra perspectiva, como a da corrente, como escolher o fus\u00edvel de a\u00e7\u00e3o r\u00e1pida certo para um rel\u00e9 de estado s\u00f3lido (SSR)? Na se\u00e7\u00e3o a seguir, ensinaremos como fazer isso passo a passo.<\/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. Verifique a corrente m\u00e1xima de resist\u00eancia do rel\u00e9 de estado s\u00f3lido<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    H\u00e1 tr\u00eas tipos de rel\u00e9s de estado s\u00f3lido: rel\u00e9s monof\u00e1sicos de estado s\u00f3lido<\/a><\/span>, rel\u00e9s trif\u00e1sicos de estado s\u00f3lido<\/a><\/span>e reguladores de tens\u00e3o de estado s\u00f3lido<\/a><\/span>. O fornecedor geralmente especifica a corrente de sa\u00edda m\u00e1xima que ele pode suportar na se\u00e7\u00e3o de carga; preste muita aten\u00e7\u00e3o a isso.<\/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. Confirme se a tens\u00e3o de carga \u00e9 CA ou CC<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Al\u00e9m disso, verifique se o rel\u00e9 de estado s\u00f3lido \u00e9 usado para controlar uma carga CC ou CA. Os rel\u00e9s de estado s\u00f3lido CC requerem fus\u00edveis de a\u00e7\u00e3o r\u00e1pida CC para prote\u00e7\u00e3o, enquanto os rel\u00e9s de estado s\u00f3lido CA requerem fus\u00edveis de a\u00e7\u00e3o r\u00e1pida CA.<\/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. Selecione o tipo correto de fus\u00edvel<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Como os rel\u00e9s de estado s\u00f3lido s\u00e3o chaves semicondutoras, seu tempo de resposta \u00e9 mais r\u00e1pido do que o das chaves mec\u00e2nicas comuns. Portanto, o tempo de fus\u00e3o do fus\u00edvel de a\u00e7\u00e3o r\u00e1pida deve ser mais r\u00e1pido do que o tempo de resposta e o tempo de falha. Portanto, voc\u00ea precisa usar os fus\u00edveis de a\u00e7\u00e3o r\u00e1pida dos tipos aR e gR mencionados anteriormente.<\/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. Escolha um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida com uma corrente nominal adequada: <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Se a carga for uma carga resistiva (como um elemento de aquecimento), a corrente nominal do fus\u00edvel de a\u00e7\u00e3o r\u00e1pida deve ser 1,5 vez a corrente nominal do rel\u00e9 de estado s\u00f3lido; se a carga controlada for um motor, um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida com corrente nominal de 2 a 2,5 vezes a corrente nominal do rel\u00e9 de estado s\u00f3lido deve ser selecionado para suportar a grande corrente de surto quando o motor der partida.<\/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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    Como conectar um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida a um rel\u00e9 de estado s\u00f3lido?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Depois de selecionar um fus\u00edvel de a\u00e7\u00e3o r\u00e1pida adequado seguindo as diretrizes acima, a pr\u00f3xima etapa \u00e9 a fia\u00e7\u00e3o correta com o rel\u00e9 de estado s\u00f3lido.<\/span><\/p>

    O fus\u00edvel de a\u00e7\u00e3o r\u00e1pida \u00e9 usado principalmente para proteger os dispositivos internos de energia do SSR, como tiristores ou MOSFETs. Ele deve ser conectado em s\u00e9rie com o rel\u00e9 de estado s\u00f3lido e a carga. No caso de curto-circuito na carga ou falha de sobrecarga, o fus\u00edvel de a\u00e7\u00e3o r\u00e1pida pode cortar imediatamente a fonte de alimenta\u00e7\u00e3o para proteger o SSR.<\/span><\/p>

    Nas figuras a seguir, mostraremos como conectar os fus\u00edveis de a\u00e7\u00e3o r\u00e1pida a diferentes tipos de rel\u00e9s de estado s\u00f3lido:<\/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\"Diagrama\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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    \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Diagrama\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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    Conclus\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Em resumo, os fus\u00edveis de a\u00e7\u00e3o r\u00e1pida s\u00e3o componentes auxiliares indispens\u00e1veis em aplica\u00e7\u00f5es de rel\u00e9s de estado s\u00f3lido. Eles n\u00e3o apenas protegem a carga contra danos causados por curto-circuito, mas tamb\u00e9m protegem de forma confi\u00e1vel os dispositivos semicondutores internos do rel\u00e9 de estado s\u00f3lido contra a queima em caso de falha.<\/span><\/p>

    Se quiser saber mais sobre rel\u00e9s de estado s\u00f3lido ou obter nossas recomenda\u00e7\u00f5es sobre os fus\u00edveis de a\u00e7\u00e3o r\u00e1pida mais adequados, envie suas perguntas para <\/span>shonxu@lorentzzi.com<\/span><\/span><\/a><\/span>e <\/span>Lorentzzi Electric<\/span><\/a><\/span>\u2018fornecer\u00e3o a voc\u00ea uma solu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel.<\/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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","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":"var(--ast-global-color-5)","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":""}},"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\/pt\/how-to-select-the-right-fast-acting-fuses-for-your-solid-state-relays\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" 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