{"id":3622,"date":"2025-07-14T16:09:52","date_gmt":"2025-07-14T08:09:52","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3622"},"modified":"2025-07-14T16:13:43","modified_gmt":"2025-07-14T08:13:43","slug":"why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/","title":{"rendered":"\u00bfPor qu\u00e9 las placas de circuito impreso se conectan a tierra con chasis met\u00e1licos mediante conexiones capacitivas resistivas?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Tabla de contenidos<\/p>\n<span class=\"ez-toc-title-toggle\"><\/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.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#1_Core_Objectives_of_RC_Connection\" >1. Objetivos principales de RC Connection<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#11_Electromagnetic_Compatibility_EMC_Requirements\" >1.1 Requisitos de compatibilidad electromagn\u00e9tica (CEM)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#12_Safety_Protection_Requirements\" >1.2 Requisitos de protecci\u00f3n de seguridad<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#2_Key_Functions_and_Selection_of_Capacitors\" >2. Funciones clave y selecci\u00f3n de condensadores<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#21_High-Frequency_Noise_Management\" >2.1 Gesti\u00f3n del ruido de alta frecuencia<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#22_Hazardous_Voltage_Isolation\" >2.2 Aislamiento de tensiones peligrosas<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#3_Resistor_Design_for_Protection_Mechanisms\" >3. Dise\u00f1o de resistencias para mecanismos de protecci\u00f3n<\/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.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#31_ESD_Protection\" >3.1 Protecci\u00f3n ESD<\/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.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#32_Current_Limiting_Protection\" >3.2 Protecci\u00f3n limitadora de corriente<\/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.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#4_Engineering_Practices_and_Test_Verification\" >4. Pr\u00e1cticas de ingenier\u00eda y verificaci\u00f3n de pruebas<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#41_Typical_Connection_Scheme\" >4.1 Esquema de conexi\u00f3n t\u00edpico<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#42_Key_Test_Items\" >4.2 Elementos clave de la prueba<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#5_Industry_Applications_and_Optimization\" >5. Aplicaciones industriales y optimizaci\u00f3n<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#51_Parameter_Selection_by_Application\" >5.1 Selecci\u00f3n de par\u00e1metros por aplicaci\u00f3n<\/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.topfastpcb.com\/es\/blog\/why-are-pcbs-grounded-to-metal-chassis-using-resistive-capacitive-connections\/#52_Reliability_Enhancement\" >5.2 Mejora de la fiabilidad<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Core_Objectives_of_RC_Connection\"><\/span>1. Objetivos principales de RC Connection<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_Electromagnetic_Compatibility_EMC_Requirements\"><\/span>1.1 Requisitos de compatibilidad electromagn\u00e9tica (CEM)<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Supresi\u00f3n del ruido de alta frecuencia<\/strong>: Proporciona una v\u00eda de baja impedancia para el ruido por encima de 30MHz (funci\u00f3n de condensador)<\/li>\n\n<li><strong>Aislamiento de baja frecuencia<\/strong>: Bloquea las interferencias de potencia de 50 Hz (caracter\u00edstica de alta resistencia)<\/li>\n\n<li><strong>Par\u00e1metros t\u00edpicos<\/strong>: Condensador 1-100nF\/Y + resistencia 1-2M\u03a9<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_Safety_Protection_Requirements\"><\/span>1.2 Requisitos de protecci\u00f3n de seguridad<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Descarga ESD<\/strong>: La resistencia de 1M\u03a9 cumple la norma IEC61000-4-2 (descarga 2kV est\u00e1ticos en \u226410 segundos).<\/li>\n\n<li><strong>Control de la corriente de fuga<\/strong>: Limita la corriente a \u22640,1mA (conforme a UL1950)<\/li><\/ul><p>\u00bfNecesita ayuda profesional para el dise\u00f1o de EMC? <a href=\"https:\/\/www.topfastpcb.com\/es\/contact\/\">Haga clic para consultar a nuestro equipo de expertos en EMC<\/a> y obtenga soluciones personalizadas.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection.jpg\" alt=\"conexi\u00f3n resistencia-condensador\" class=\"wp-image-3624\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Key_Functions_and_Selection_of_Capacitors\"><\/span>2. Funciones clave y selecci\u00f3n de condensadores<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"21_High-Frequency_Noise_Management\"><\/span>2.1 Gesti\u00f3n del ruido de alta frecuencia<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Selecci\u00f3n del condensador Y<\/strong>:<\/li>\n\n<li>Dispositivos m\u00e9dicos: Prioridad a la clase Y1 (tensi\u00f3n soportada de 8 kV)<\/li>\n\n<li>Electr\u00f3nica de consumo: Clase Y2 (5kV) para una mejor relaci\u00f3n coste-rendimiento<\/li>\n\n<li><strong>Impacto de la capacitancia<\/strong>:<\/li>\n\n<li>Condensador de 1nF: impedancia de ~3,2M\u03a9 a 50Hz (aislamiento efectivo).<\/li>\n\n<li>Condensador de 100nF: ~0,016\u03a9 de impedancia a 100MHz (ruta de baja impedancia).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"22_Hazardous_Voltage_Isolation\"><\/span>2.2 Aislamiento de tensiones peligrosas<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Normas de seguridad<\/strong>:<\/li>\n\n<li>Aislamiento reforzado: \u22652,5kV de tensi\u00f3n soportada (IEC62368-1)<\/li>\n\n<li>Distancia de fuga: \u22656mm (sistemas 220VAC)<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Resistor_Design_for_Protection_Mechanisms\"><\/span>3. <a href=\"https:\/\/www.topfastpcb.com\/es\/products\/resistors\/\">Resistencia<\/a> Dise\u00f1o de mecanismos de protecci\u00f3n<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"31_ESD_Protection\"><\/span>3.1 Protecci\u00f3n ESD<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Par\u00e1metro<\/th><th>Valor est\u00e1ndar<\/th><th>Norma de ensayo<\/th><\/tr><\/thead><tbody><tr><td>Resistencia<\/td><td>1M\u03a9\u00b15%<\/td><td>IEC61000-4-2<\/td><\/tr><tr><td>Tiempo de descarga<\/td><td>\u226410 segundos<\/td><td>Descarga de contacto de 2 kV<\/td><\/tr><tr><td>Coeficiente de temperatura<\/td><td>\u226450ppm\/\u2103<\/td><td>JEDEC JESD22<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"32_Current_Limiting_Protection\"><\/span>3.2 Protecci\u00f3n limitadora de corriente<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Cuando el chasis tiene 1kV de est\u00e1tica:<\/li>\n\n<li>Corriente de conexi\u00f3n directa: Te\u00f3rica \u221e (peligrosa)<\/li>\n\n<li>Corriente de resistencia de 1M\u03a9: 1mA (rango seguro).<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-1.jpg\" alt=\"conexi\u00f3n resistencia-condensador\" class=\"wp-image-3625\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Engineering_Practices_and_Test_Verification\"><\/span>4. Pr\u00e1cticas de ingenier\u00eda y verificaci\u00f3n de pruebas<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41_Typical_Connection_Scheme\"><\/span>4.1 Esquema de conexi\u00f3n t\u00edpico<span class=\"ez-toc-section-end\"><\/span><\/h3><pre class=\"wp-block-code\"><code>PCB_GND \u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500 1M\u03a9 \u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500 EGND\n             \u2502 \u2502\n             \u2514\u2500\u2500 100nF\/Y2 \u2500\u2500\u2500\u2518  <\/code><\/pre><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42_Key_Test_Items\"><\/span>4.2 Elementos clave de la prueba<span class=\"ez-toc-section-end\"><\/span><\/h3><ol class=\"wp-block-list\"><li><strong>Prueba de tensi\u00f3n soportada<\/strong>: 3kVAC\/60s (entre GND y EGND)<\/li>\n\n<li><strong>Emisi\u00f3n radiada<\/strong>: Banda 30MHz-1GHz (debe ser &lt;30dB\u03bcV\/m)<\/li>\n\n<li><strong>Prueba ESD<\/strong>: \u00b18kV descarga de contacto (criterios Clase A)<\/li><\/ol><p><strong>Oferta limitada<\/strong>:\u00a0\u00a0<a href=\"https:\/\/www.topfastpcb.com\/es\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">Contacto Ingenieros<\/a><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Industry_Applications_and_Optimization\"><\/span>5. Aplicaciones industriales y optimizaci\u00f3n<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"51_Parameter_Selection_by_Application\"><\/span>5.1 Selecci\u00f3n de par\u00e1metros por aplicaci\u00f3n<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Aplicaci\u00f3n<\/th><th>Tipo de condensador<\/th><th>Valor de la resistencia<\/th><th>Las las exigencias especiales<\/th><\/tr><\/thead><tbody><tr><td>M\u00e9dico<\/td><td>Y1\/10nF<\/td><td>2M\u03a9<\/td><td>Conformidad con IEC60601-1<\/td><\/tr><tr><td>Industrial<\/td><td>Y2\/47nF<\/td><td>1M\u03a9<\/td><td>Protecci\u00f3n contra sobretensiones mejorada<\/td><\/tr><tr><td>Consumidores<\/td><td>X7R\/1nF<\/td><td>1,2M\u03a9<\/td><td>Optimizaci\u00f3n de costes<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"52_Reliability_Enhancement\"><\/span>5.2 Mejora de la fiabilidad<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Soluci\u00f3n avanzada<\/strong>: Diodo TVS paralelo (por ejemplo, SMBJ15CA)<\/li>\n\n<li><strong>Optimizaci\u00f3n del dise\u00f1o<\/strong>: Utilice el paquete 0201 para ahorrar espacio en la placa de circuito impreso 30%<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-2.jpg\" alt=\"conexi\u00f3n resistencia-condensador\" class=\"wp-image-3626\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/resistor-capacitor-connection-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><p>La conexi\u00f3n resistencia-condensador logra un equilibrio entre el aislamiento de seguridad y el rendimiento CEM mediante un dise\u00f1o preciso de los par\u00e1metros (1M\u03a9+100nF es la combinaci\u00f3n \u00f3ptima). En el dise\u00f1o real, es necesario optimizar exhaustivamente en funci\u00f3n de las normas de seguridad (como IEC62368), los datos de las pruebas y los factores de coste. Esta soluci\u00f3n se ha convertido en una pr\u00e1ctica habitual en campos como la electr\u00f3nica de consumo y los equipos m\u00e9dicos.<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>La masa de la placa de circuito impreso (GND) y el chasis met\u00e1lico (EGND) se conectan mediante una combinaci\u00f3n de resistencia y condensador (normalmente una resistencia de 1M\u03a9 en paralelo con un condensador de 1-100nF) para suprimir el ruido de alta frecuencia, proporcionar protecci\u00f3n electrost\u00e1tica, aislar las frecuencias de potencia y optimizar la compatibilidad electromagn\u00e9tica.<\/p>","protected":false},"author":1,"featured_media":3623,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[196],"class_list":["post-3622","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-resistor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why are PCBs grounded to metal chassis using resistive capacitive connections? 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