{"id":50839,"date":"2026-05-26T11:26:45","date_gmt":"2026-05-26T11:26:45","guid":{"rendered":"https:\/\/www.kdmsteel.com\/?p=50839"},"modified":"2026-08-14T09:39:10","modified_gmt":"2026-08-14T09:39:10","slug":"tamanhos-padrao-de-disjuntores","status":"publish","type":"post","link":"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/","title":{"rendered":"Um guia completo para tamanhos padr\u00e3o de disjuntores"},"content":{"rendered":"<p>As dimens\u00f5es padr\u00e3o dos disjuntores impactam diretamente o layout dos pain\u00e9is el\u00e9tricos e a conformidade do projeto. Considerando as diferentes correntes nominais, tamanhos de carca\u00e7a e normas regionais, como saber qual o tamanho correto? Este artigo ajudar\u00e1 voc\u00ea a entender as principais especifica\u00e7\u00f5es e diferen\u00e7as dimensionais entre os diversos disjuntores, facilitando o processo de sele\u00e7\u00e3o e projeto.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 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\">\u00cdndice<\/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=\"Alternar \u00edndice\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/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.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#What_Are_Standard_Circuit_Breaker_Sizes\" >Quais s\u00e3o os tamanhos padr\u00e3o de disjuntores?<\/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.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Standard_Circuit_Breaker_Sizes_by_Type\" >Dimens\u00f5es padr\u00e3o de disjuntores por tipo<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#MCB_Sizes\" >Tamanhos de MCB<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#MCCB_Frame_Sizes\" >Dimens\u00f5es dos quadros MCCB<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#ACB_Industrial_Breaker_Sizes\" >Dimens\u00f5es dos disjuntores industriais ACB<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Circuit_Breaker_Sizes_by_Amperage_and_Frame_Rating\" >Dimensionamento de disjuntores por amperagem e classifica\u00e7\u00e3o de quadro<\/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.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Standard_Breaker_Sizes_by_Voltage_and_Region\" >Dimensionamento padr\u00e3o de disjuntores por tens\u00e3o e regi\u00e3o.<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Breaker_Sizes_for_Common_Industrial_Voltage_Systems\" >Dimensionamento de disjuntores para sistemas de tens\u00e3o industrial comuns<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Size_Specifications_of_Different_Regional_Standards\" >Especifica\u00e7\u00f5es de tamanho de diferentes padr\u00f5es regionais<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Circuit_Breaker_Dimensions_and_Installation_Space_Requirements\" >Dimens\u00f5es do disjuntor e requisitos de espa\u00e7o para instala\u00e7\u00e3o<\/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.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#FAQ\" >Perguntas frequentes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Are_Circuit_Breakers_Compliant_with_IEC_and_UL_Standards_Exchangeable_in_Terms_of_Size_and_Specifications\" >Os disjuntores s\u00e3o compat\u00edveis com as normas IEC e UL, e intercambi\u00e1veis em termos de tamanho e especifica\u00e7\u00f5es?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Can_the_Cabinet_Design_Be_Used_with_Circuit_Breakers_of_Different_AF_Frame_Sizes\" >O design do gabinete pode ser usado com disjuntores de diferentes tamanhos de quadro AF?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Is_the_Impact_of_a_Circuit_Breakers_Frame_Size_on_the_Cabinet_Width_Fixed\" >O impacto das dimens\u00f5es da estrutura do disjuntor na largura do painel \u00e9 fixo?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#What_Procedure_Should_Be_Followed_to_Identify_the_Proper_Circuit_Breaker_Frame_Size_for_a_Project\" >Qual o procedimento a seguir para identificar o tamanho adequado da estrutura do disjuntor para um projeto?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#What_Are_the_Main_Variations_in_General_Layout_Design_for_MCBS_MCCBS_and_ACBS\" >Quais s\u00e3o as principais varia\u00e7\u00f5es no projeto de layout geral para MCBS, MCCBS e ACBS?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.kdmsteel.com\/pt\/standard-circuit-breaker-sizes\/#Final_Thought\" >Considera\u00e7\u00f5es finais<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Are_Standard_Circuit_Breaker_Sizes\"><\/span>Quais s\u00e3o os tamanhos padr\u00e3o de disjuntores?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50844\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/What-Are-Standard-Circuit-Breaker-Sizes.jpg\" alt=\"Quais s\u00e3o os tamanhos padr\u00e3o de disjuntores?\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/What-Are-Standard-Circuit-Breaker-Sizes.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/What-Are-Standard-Circuit-Breaker-Sizes-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/What-Are-Standard-Circuit-Breaker-Sizes-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/What-Are-Standard-Circuit-Breaker-Sizes-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>As dimens\u00f5es padr\u00e3o dos disjuntores n\u00e3o se baseiam apenas na apar\u00eancia f\u00edsica. Elas tamb\u00e9m envolvem diversos par\u00e2metros de compatibilidade. Ao selecionar um modelo, n\u00e3o se atenha apenas \u00e0 amperagem. O tamanho da estrutura, o n\u00famero de polos e as dimens\u00f5es de montagem influenciar\u00e3o o layout do seu painel el\u00e9trico.<\/p>\n<p>Os principais par\u00e2metros de refer\u00eancia s\u00e3o os seguintes:<\/p>\n<table width=\"601\">\n<tbody>\n<tr>\n<td width=\"167\"><strong>Par\u00e2metro<\/strong><\/td>\n<td width=\"434\"><strong>Papel estrutural do gabinete<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"167\"><strong>Classifica\u00e7\u00e3o de amperagem<\/strong><\/td>\n<td width=\"434\"><a href=\"https:\/\/wiring-harness.com\/a-practical-guide-to-choosing-the-right-wire-gauge-standards-and-mistakes-to-avoid\/\">Bitola do fio<\/a>, blocos de terminais e espa\u00e7o de ventila\u00e7\u00e3o.<\/td>\n<\/tr>\n<tr>\n<td width=\"167\"><strong>Tamanho da moldura<\/strong><\/td>\n<td width=\"434\">Dimens\u00f5es f\u00edsicas do chassi, \u00e1rea da placa de montagem principal e limites da abertura da porta.<\/td>\n<\/tr>\n<tr>\n<td width=\"167\"><strong>Configura\u00e7\u00e3o dos postes<\/strong><\/td>\n<td width=\"434\">Espa\u00e7amento horizontal, comprimento do trilho DIN e layout do painel traseiro.<\/td>\n<\/tr>\n<tr>\n<td width=\"167\"><strong>Classifica\u00e7\u00e3o de tens\u00e3o<\/strong><\/td>\n<td width=\"434\">Dist\u00e2ncia de seguran\u00e7a do entreferro, limite de isolamento e dist\u00e2ncia entre fases.<\/td>\n<\/tr>\n<tr>\n<td width=\"167\"><strong>Dimens\u00f5es de montagem<\/strong><\/td>\n<td width=\"434\">Perfil de profundidade da caixa, localiza\u00e7\u00e3o dos suportes estruturais e padr\u00f5es de fura\u00e7\u00e3o da chapa met\u00e1lica.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ao comparar todos os par\u00e2metros relevantes, voc\u00ea pode aprimorar a precis\u00e3o do seu projeto. Isso tamb\u00e9m indicar\u00e1 outras considera\u00e7\u00f5es de tamanho e ajudar\u00e1 a comprovar que o projeto atende \u00e0s necessidades pr\u00e1ticas do empreendimento.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Standard_Circuit_Breaker_Sizes_by_Type\"><\/span>Dimens\u00f5es padr\u00e3o de disjuntores por tipo<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50845\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Circuit-Breaker-Sizes-by-Type.jpg\" alt=\"Dimens\u00f5es padr\u00e3o de disjuntores por tipo\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Circuit-Breaker-Sizes-by-Type.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Circuit-Breaker-Sizes-by-Type-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Circuit-Breaker-Sizes-by-Type-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Circuit-Breaker-Sizes-by-Type-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"MCB_Sizes\"><\/span>Tamanhos de MCB<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Se o seu projeto envolver principalmente circuitos derivados e controle de equipamentos, voc\u00ea usar\u00e1 com frequ\u00eancia as especifica\u00e7\u00f5es e dimens\u00f5es dos disjuntores miniatura (MCB). Esses disjuntores t\u00eam um design compacto. Na ind\u00fastria, eles s\u00e3o normalmente montados em conjuntos densos em trilhos DIN, com um layout horizontal comumente adotado em ambientes internos. <a href=\"https:\/\/www.kdmsteel.com\/pt\/fabricante-de-gabinete-eletrico-personalizado\/\">gabinetes<\/a>.<\/p>\n<p>Durante o projeto de pain\u00e9is el\u00e9tricos, esses componentes praticamente n\u00e3o imp\u00f5em restri\u00e7\u00f5es quanto \u00e0 profundidade do painel. A \u00eanfase do projeto \u00e9 na horizontal. Ao projetar pain\u00e9is de controle multicircuito, \u00e9 preciso levar em considera\u00e7\u00e3o a largura total ocupada por uma fileira completa de disjuntores. Isso afeta diretamente o layout dos recortes do painel e a aloca\u00e7\u00e3o do espa\u00e7o interno.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"MCCB_Frame_Sizes\"><\/span>Dimens\u00f5es dos quadros MCCB<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ao se trabalhar com distribui\u00e7\u00e3o de energia ou aplica\u00e7\u00f5es de carga m\u00e9dia a alta, o layout interno do gabinete naturalmente se desloca em dire\u00e7\u00e3o ao n\u00edvel do MCCB (disjuntor de caixa moldada).<\/p>\n<p>Em compara\u00e7\u00e3o com os disjuntores miniatura (MCBs), este tipo de equipamento ocupa uma \u00e1rea de instala\u00e7\u00e3o mais claramente definida. O espa\u00e7o necess\u00e1rio para a passagem de cabos e barramentos tamb\u00e9m \u00e9 proporcionalmente maior, e a divis\u00e3o funcional dentro do painel torna-se cada vez mais distinta.<\/p>\n<p>Nesta fase, o layout do arm\u00e1rio \u00e9 normalmente organizado em torno de <a href=\"https:\/\/sincede.com\/a-simple-guide-to-understanding-mccb-frame-sizes\/\">tamanho da estrutura do MCCB<\/a>, A divis\u00e3o dos pain\u00e9is de montagem, bem como a aloca\u00e7\u00e3o da largura do gabinete, s\u00e3o realizadas em paralelo. Para gabinetes el\u00e9tricos industriais e equipamentos de energia OEM, esse n\u00edvel reflete uma transi\u00e7\u00e3o de uma estrutura densamente compactada para um layout de gabinete mais funcionalmente dividido.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"ACB_Industrial_Breaker_Sizes\"><\/span>Dimens\u00f5es dos disjuntores industriais ACB<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Em sistemas de alimenta\u00e7\u00e3o prim\u00e1ria ou em sistemas de distribui\u00e7\u00e3o el\u00e9trica industrial de grande escala, os disjuntores de caixa moldada (ACBs) s\u00e3o normalmente o principal ponto de refer\u00eancia para o projeto de pain\u00e9is el\u00e9tricos.<\/p>\n<p>Esses disjuntores s\u00e3o maiores e t\u00eam uma estrutura mais complexa. O espa\u00e7o dispon\u00edvel para sua instala\u00e7\u00e3o afeta diretamente o layout geral. Ao selecionar um disjuntor de caixa moldada (ACB), voc\u00ea deve adequar a estrutura do painel para acomodar seu tamanho. A profundidade do painel, o acesso para manuten\u00e7\u00e3o e o layout da barra de distribui\u00e7\u00e3o devem ser planejados de acordo com as dimens\u00f5es do disjuntor. Componentes remov\u00edveis e folgas operacionais tamb\u00e9m devem ser levados em considera\u00e7\u00e3o.<\/p>\n<p>Em muitos projetos de distribui\u00e7\u00e3o el\u00e9trica de grande escala, o layout interno do painel \u00e9 frequentemente projetado a partir das especifica\u00e7\u00f5es do disjuntor principal, expandindo-se a partir da\u00ed.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Circuit_Breaker_Sizes_by_Amperage_and_Frame_Rating\"><\/span>Dimensionamento de disjuntores por amperagem e classifica\u00e7\u00e3o de quadro<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50846\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Sizes-by-Amperage-and-Frame-Rating.jpg\" alt=\"Dimensionamento de disjuntores por amperagem e classifica\u00e7\u00e3o de quadro\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Sizes-by-Amperage-and-Frame-Rating.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Sizes-by-Amperage-and-Frame-Rating-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Sizes-by-Amperage-and-Frame-Rating-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Sizes-by-Amperage-and-Frame-Rating-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>Ao projetar uma caixa de disjuntor, a amperagem nominal e o tamanho da estrutura s\u00e3o os dois maiores fatores determinantes para sua escolha. A amperagem nominal define a capacidade de carga, enquanto o tamanho da estrutura afeta diretamente o tamanho da instala\u00e7\u00e3o do equipamento.<\/p>\n<p>Um \u00fanico tamanho de estrutura pode acomodar diversas classifica\u00e7\u00f5es de amperagem, com pouca altera\u00e7\u00e3o no tamanho da caixa. Durante a fase de projeto do gabinete, voc\u00ea deve primeiro determinar o tamanho da estrutura e, em seguida, selecionar a classifica\u00e7\u00e3o de amperagem espec\u00edfica. Consulte a tabela abaixo para obter detalhes:<\/p>\n<table width=\"601\">\n<tbody>\n<tr>\n<td width=\"103\"><strong>Classifica\u00e7\u00e3o de quadros<\/strong><\/td>\n<td width=\"103\"><strong>Faixa de amperagem t\u00edpica<\/strong><\/td>\n<td width=\"171\"><strong>Dimens\u00f5es de montagem<\/strong><\/td>\n<td width=\"224\"><strong>Considera\u00e7\u00f5es de projeto e notas pr\u00e1ticas<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"103\">125AF<\/td>\n<td width=\"103\">15\u2013125A<\/td>\n<td width=\"171\">Design compacto, compat\u00edvel com trilhos DIN padr\u00e3o.<\/td>\n<td width=\"224\">Ideal para layouts de alta densidade; configurar primeiro a estrutura e depois a fonte de alimenta\u00e7\u00e3o ajuda a evitar a maioria dos problemas de instala\u00e7\u00e3o.<\/td>\n<\/tr>\n<tr>\n<td width=\"103\">250AF<\/td>\n<td width=\"103\">100\u2013250A<\/td>\n<td width=\"171\">\u00c1rea de montagem padr\u00e3o<\/td>\n<td width=\"224\">\u00c9 compat\u00edvel com circuitos de energia convencionais e pode ser implementado usando um layout padr\u00e3o.<\/td>\n<\/tr>\n<tr>\n<td width=\"103\">400AF<\/td>\n<td width=\"103\">250\u2013400A<\/td>\n<td width=\"171\">Requer espa\u00e7o de montagem dedicado<\/td>\n<td width=\"224\">Deixe espa\u00e7o suficiente para a dissipa\u00e7\u00e3o de calor; escolher a estrutura errada afetar\u00e1 diretamente a montagem do equipamento.<\/td>\n<\/tr>\n<tr>\n<td width=\"103\">630AF<\/td>\n<td width=\"103\">400\u2013630A<\/td>\n<td width=\"171\">Instalados em compartimentos independentes<\/td>\n<td width=\"224\">Otimiza\u00e7\u00e3o do projeto de layout da barra de distribui\u00e7\u00e3o; erros dimensionais podem aumentar o custo das modifica\u00e7\u00f5es no painel el\u00e9trico.<\/td>\n<\/tr>\n<tr>\n<td width=\"103\">800AF e acima<\/td>\n<td width=\"103\">700+A<\/td>\n<td width=\"171\">Equipado com compartimentos separados<\/td>\n<td width=\"224\">Mais comumente usado em alimentadores e circuitos principais; a sele\u00e7\u00e3o incorreta geralmente exige a refabrica\u00e7\u00e3o da chapa met\u00e1lica.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Standard_Breaker_Sizes_by_Voltage_and_Region\"><\/span>Dimensionamento padr\u00e3o de disjuntores por tens\u00e3o e regi\u00e3o.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50847\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Breaker-Sizes-by-Voltage-and-Region.jpg\" alt=\"Dimensionamento padr\u00e3o de disjuntores por tens\u00e3o e regi\u00e3o.\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Breaker-Sizes-by-Voltage-and-Region.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Breaker-Sizes-by-Voltage-and-Region-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Breaker-Sizes-by-Voltage-and-Region-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Standard-Breaker-Sizes-by-Voltage-and-Region-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>As normas el\u00e9tricas vigentes em diferentes pa\u00edses e regi\u00f5es afetam diretamente a tens\u00e3o nominal, a capacidade de interrup\u00e7\u00e3o e os requisitos de instala\u00e7\u00e3o dos disjuntores. Em seu trabalho em projetos internacionais, a tens\u00e3o n\u00e3o \u00e9 apenas um par\u00e2metro el\u00e9trico, mas tamb\u00e9m uma dimens\u00e3o importante e independente para a conformidade do projeto.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Breaker_Sizes_for_Common_Industrial_Voltage_Systems\"><\/span>Dimensionamento de disjuntores para sistemas de tens\u00e3o industrial comuns<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>O dimensionamento, as dimens\u00f5es e os requisitos de projeto dos disjuntores variam dependendo das condi\u00e7\u00f5es de tens\u00e3o. Os principais cen\u00e1rios de aplica\u00e7\u00e3o s\u00e3o os seguintes:<\/p>\n<ul>\n<li>230V \/ 400V (norma IEC)<\/li>\n<\/ul>\n<p>Amplamente utilizado em ambientes residenciais, comerciais e industriais de pequena escala. Os principais disjuntores s\u00e3o microdisjuntores e disjuntores de caixa moldada, e o layout do painel tende a ser modular.<\/p>\n<ul>\n<li>480 V (padr\u00e3o industrial norte-americano)<\/li>\n<\/ul>\n<p>Utilizados principalmente em sistemas de alimenta\u00e7\u00e3o de energia e equipamentos industriais. Esses sistemas exigem maior capacidade de interrup\u00e7\u00e3o de curto-circuito. Os disjuntores de caixa moldada s\u00e3o a principal op\u00e7\u00e3o.<\/p>\n<ul>\n<li>600 V (Padr\u00e3o Norte-Americano \/ Ind\u00fastria Pesada)<\/li>\n<\/ul>\n<p>Adequado para m\u00e1quinas pesadas, minera\u00e7\u00e3o, energia e outras aplica\u00e7\u00f5es. Os produtos exigem classifica\u00e7\u00f5es de isolamento e capacidade de interrup\u00e7\u00e3o mais elevadas, com dimens\u00f5es gerais maiores e espa\u00e7amento de montagem mais amplo.<\/p>\n<ul>\n<li>690 V (Norma de Extens\u00e3o Industrial IEC)<\/li>\n<\/ul>\n<p>Comumente utilizados em sistemas de distribui\u00e7\u00e3o de energia industrial de grande escala e em sistemas de controle de motores. Disjuntores de caixa moldada de alta qualidade e disjuntores tipo moldura s\u00e3o as aplica\u00e7\u00f5es mais comuns. Os requisitos de zoneamento do inv\u00f3lucro s\u00e3o mais rigorosos.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Size_Specifications_of_Different_Regional_Standards\"><\/span>Especifica\u00e7\u00f5es de tamanho de diferentes padr\u00f5es regionais<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ao selecionar uma solu\u00e7\u00e3o para projetos inter-regionais, voc\u00ea deve estar ciente das prioridades de design dos diferentes sistemas:<\/p>\n<ul>\n<li>Sistema IEC (Europa, Oriente M\u00e9dio e \u00c1sia)<\/li>\n<\/ul>\n<p>A \u00eanfase est\u00e1 em um conceito modular e uma estrutura de montagem universal em trilho DIN, com dimens\u00f5es de componentes altamente padronizadas que facilitam a compacta\u00e7\u00e3o do espa\u00e7o.<\/p>\n<ul>\n<li>Sistema UL (Am\u00e9rica do Norte)<\/li>\n<\/ul>\n<p>O sistema concentra-se na avalia\u00e7\u00e3o da capacidade de interrup\u00e7\u00e3o e nos n\u00edveis de certifica\u00e7\u00e3o do produto. Para a mesma amperagem nominal, as dimens\u00f5es e as especifica\u00e7\u00f5es de montagem do equipamento est\u00e3o sujeitas a normas espec\u00edficas.<\/p>\n<ul>\n<li>NEC (C\u00f3digo El\u00e9trico Americano)<\/li>\n<\/ul>\n<p>Esta norma estabelece requisitos rigorosos para as folgas de instala\u00e7\u00e3o e detalhes de constru\u00e7\u00e3o no local. Ao planejar o espa\u00e7o para arm\u00e1rios, voc\u00ea deve seguir rigorosamente as normas de folga aplic\u00e1veis.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Circuit_Breaker_Dimensions_and_Installation_Space_Requirements\"><\/span>Dimens\u00f5es do disjuntor e requisitos de espa\u00e7o para instala\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50848\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Dimensions-and-Installation-Space-Requirements.jpg\" alt=\"Dimens\u00f5es do disjuntor e requisitos de espa\u00e7o para instala\u00e7\u00e3o\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Dimensions-and-Installation-Space-Requirements.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Dimensions-and-Installation-Space-Requirements-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Dimensions-and-Installation-Space-Requirements-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Circuit-Breaker-Dimensions-and-Installation-Space-Requirements-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<ul>\n<li>Espa\u00e7o livre para instala\u00e7\u00e3o<\/li>\n<\/ul>\n<p>Disjuntores de tamanho maior impedem a compacta\u00e7\u00e3o dos pain\u00e9is que pode ser obtida com disjuntores menores. \u00c9 necess\u00e1rio prever espa\u00e7o lateral adequado para facilitar a dissipa\u00e7\u00e3o de calor, a instala\u00e7\u00e3o e ajustes futuros.<\/p>\n<ul>\n<li>Espa\u00e7o para layout de barramento<\/li>\n<\/ul>\n<p>\u00c0 medida que o tamanho dos disjuntores aumenta, a \u00e1rea da barra de distribui\u00e7\u00e3o normalmente tamb\u00e9m aumenta. Ao dimensionar a largura do painel, voc\u00ea deve considerar simultaneamente a dist\u00e2ncia entre fases e o espa\u00e7o para as conex\u00f5es da barra de distribui\u00e7\u00e3o, a fim de evitar sobrecarga no layout interno posteriormente.<\/p>\n<ul>\n<li>\u00c1rea de Roteamento de Cabos<\/li>\n<\/ul>\n<p>Disjuntores de alta capacidade s\u00e3o normalmente usados com cabos de bitola grossa. Durante a fase de projeto, \u00e9 importante considerar o raio de curvatura do cabo e prever profundidade suficiente no painel para garantir uma passagem de cabos adequada.<\/p>\n<ul>\n<li>Espa\u00e7o para Opera\u00e7\u00e3o e Manuten\u00e7\u00e3o<\/li>\n<\/ul>\n<p>Uma \u00e1rea b\u00e1sica para opera\u00e7\u00e3o e manuten\u00e7\u00e3o deve ser reservada em frente ao disjuntor principal. Isso facilita a abertura e o fechamento do disjuntor, a realiza\u00e7\u00e3o de manuten\u00e7\u00e3o e a substitui\u00e7\u00e3o de componentes no futuro.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>Perguntas frequentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Are_Circuit_Breakers_Compliant_with_IEC_and_UL_Standards_Exchangeable_in_Terms_of_Size_and_Specifications\"><\/span>Os disjuntores s\u00e3o compat\u00edveis com as normas IEC e UL, e intercambi\u00e1veis em termos de tamanho e especifica\u00e7\u00f5es?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Eles n\u00e3o s\u00e3o compat\u00edveis. Os dispositivos IEC encaixam em trilhos DIN padr\u00e3o e t\u00eam dimens\u00f5es uniformes. Os produtos UL est\u00e3o sujeitos a requisitos de certifica\u00e7\u00e3o. Mesmo para a mesma amperagem, suas dimens\u00f5es f\u00edsicas e locais de montagem diferem.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_the_Cabinet_Design_Be_Used_with_Circuit_Breakers_of_Different_AF_Frame_Sizes\"><\/span>O design do gabinete pode ser usado com disjuntores de diferentes tamanhos de quadro AF?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u00e3o recomendamos a aplica\u00e7\u00e3o direta. Disjuntores de 125 AF em caixas pequenas permitem instala\u00e7\u00e3o densa. Acima de 400 AF, \u00e9 necess\u00e1rio um espa\u00e7o dedicado para dissipa\u00e7\u00e3o de calor e para a instala\u00e7\u00e3o. Para disjuntores de 800 AF e superiores, um compartimento separado deve ser providenciado. Cada tamanho possui requisitos de layout diferentes.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_the_Impact_of_a_Circuit_Breakers_Frame_Size_on_the_Cabinet_Width_Fixed\"><\/span>O impacto das dimens\u00f5es da estrutura do disjuntor na largura do painel \u00e9 fixo?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u00e3o, n\u00e3o \u00e9 fixo. O tamanho da estrutura determina a dist\u00e2ncia m\u00ednima entre as fases, mas a largura final do painel tamb\u00e9m depende da disposi\u00e7\u00e3o da barra de distribui\u00e7\u00e3o e da fia\u00e7\u00e3o, bem como das normas regionais.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Procedure_Should_Be_Followed_to_Identify_the_Proper_Circuit_Breaker_Frame_Size_for_a_Project\"><\/span>Qual o procedimento a seguir para identificar o tamanho adequado da estrutura do disjuntor para um projeto?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Recomendamos que primeiro me\u00e7a a largura e a profundidade dispon\u00edveis do painel de montagem e, em seguida, selecione o tamanho de moldura correspondente. Este m\u00e9todo ajuda a evitar problemas durante a instala\u00e7\u00e3o e futuras altera\u00e7\u00f5es da caixa.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Are_the_Main_Variations_in_General_Layout_Design_for_MCBS_MCCBS_and_ACBS\"><\/span>Quais s\u00e3o as principais varia\u00e7\u00f5es no projeto de layout geral para MCBS, MCCBS e ACBS?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Os disjuntores miniatura (MCBs) s\u00e3o projetados principalmente levando em considera\u00e7\u00e3o a largura; os disjuntores de caixa moldada (MCCBs) devem equilibrar a largura do gabinete, o espa\u00e7o da barra de distribui\u00e7\u00e3o e o roteamento dos cabos; os disjuntores de caixa plana (ACBs) exigem uma an\u00e1lise minuciosa da profundidade do gabinete, do acesso para manuten\u00e7\u00e3o e das \u00e1reas funcionais.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Final_Thought\"><\/span>Considera\u00e7\u00f5es finais<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50850\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Final-Thought-2.jpg\" alt=\"Considera\u00e7\u00f5es finais\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Final-Thought-2.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Final-Thought-2-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Final-Thought-2-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/05\/Final-Thought-2-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>Escolher o disjuntor certo vai muito al\u00e9m das especifica\u00e7\u00f5es el\u00e9tricas. Tamb\u00e9m envolve garantir que o equipamento seja adequado \u00e0 estrutura do painel e ao espa\u00e7o de instala\u00e7\u00e3o. A KDM ter\u00e1 prazer em fabricar pain\u00e9is personalizados para todos os disjuntores. Isso garantir\u00e1 o bom andamento do seu projeto.<a href=\"https:\/\/www.kdmsteel.com\/pt\/contato\/\">Contate-nos<\/a> hoje.<\/p>","protected":false},"excerpt":{"rendered":"<p>Standard circuit breaker sizes directly impact the layout of electrical cabinets and project compliance. Given these different current ratings, frame sizes, and different regional codes, how do you know which size is right? This article will help you understand the key specifications and dimensional differences among various circuit breakers, making the selection and design process [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":50842,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"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":"disabled","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","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":[1],"tags":[],"class_list":["post-50839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A Complete Guide to Standard Circuit Breaker Sizes - KDM Steel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kdmsteel.com\/pt\/tamanhos-padrao-de-disjuntores\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A Complete Guide to Standard Circuit Breaker Sizes - KDM Steel\" \/>\n<meta property=\"og:description\" content=\"Standard circuit breaker sizes directly impact the layout of electrical cabinets and project compliance. Given these different current ratings, frame sizes, and different regional codes, how do you know which size is right? 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