{"id":2250,"date":"2026-07-30T11:27:19","date_gmt":"2026-07-30T03:27:19","guid":{"rendered":"https:\/\/eqsvq3fzct.wpdns.site\/product\/jcrd4-125-4-pole-rcd-residual-current-circuit-breaker-type-ac-or-type-a-rccb\/"},"modified":"2026-10-20T09:43:14","modified_gmt":"2026-10-20T01:43:14","slug":"jcrd4-125-4%ea%b7%b9-rcd-%ec%9e%94%eb%a5%98-%ec%a0%84%eb%a5%98-%ed%9a%8c%eb%a1%9c-%ec%b0%a8%eb%8b%a8%ea%b8%b0-%ed%83%80%ec%9e%85-ac-%eb%98%90%eb%8a%94-%ed%83%80%ec%9e%85-a-rccb","status":"publish","type":"product","link":"https:\/\/w9-group.com\/ko\/product\/jcrd4-125-4-pole-rcd-residual-current-circuit-breaker-type-ac-or-type-a-rccb\/","title":{"rendered":"JCRD4-125 RCCB"},"content":{"rendered":"<div class=\"ksion-pdp--w9-jcrd4-125-2250\">\n<nav class=\"ksion-pdp__jump\" aria-label=\"Product page sections\">\n    <a href=\"#specifications\">Specifications<\/a><a href=\"#selection\">Selection<\/a><a href=\"#evidence\">W9 Group<\/a><a href=\"#resources\">Resources<\/a><a href=\"#faq\">FAQ<\/a><a class=\"ksion-pdp__jump-cta\" href=\"#product-enquiry\">Request a quote<\/a><br \/>\n  <\/nav>\n<section class=\"ksion-pdp__section\" id=\"specifications\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">TECHNICAL DATA<\/p>\n<h2>JCRD4-125 4 Pole RCCB Specifications<\/h2>\n<p>The JCRD4-125 RCCB is a residual current circuit breaker for earth-leakage protection. W9 Group lists 4P, Type A or Type AC and 30 \/ 100 \/ 300 mA sensitivity choices. Specify a coordinated MCB or fuse for overload and short-circuit protection.<\/p>\n<\/div>\n<div class=\"ksion-pdp__table-wrap ksion-pdp__original-tables\">\n<table>\n<tbody>\n<tr>\n<td>RCD<\/td>\n<td>Types of Load<\/td>\n<\/tr>\n<tr>\n<td>Type AC<\/td>\n<td>Resistive, capacitive, inductive loadsImmersion heater, oven \/ hob with resistive heating elements, electric shower, tungsten \/ halogen lighting<\/td>\n<\/tr>\n<tr>\n<td>Type A<\/td>\n<td>Single phase with electronic componentsSingle phase inverters, class 1 IT &amp; multimedia equipment, power supplies for class 2 equipment, appliances such as washing machines, lighting controls, induction hobs &amp; EV charging<\/td>\n<\/tr>\n<tr>\n<td>Type F<\/td>\n<td>Frequency controlled equipmentAppliances containing synchronous motors, some class 1 power tools, some air conditioning controllers using variable frequency speed drives<\/td>\n<\/tr>\n<tr>\n<td>Type B<\/td>\n<td>Three phase electronic equipmentInverters for speed control, ups, EV charging where DC fault current is &gt;6mA, PV<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td><\/td>\n<td>Standard<\/td>\n<td>IEC61008-1 ,\u00a0 EN61008-1<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"12\">Electrical<br \/>\nfeatures<\/td>\n<td>Rated current In (A)<\/td>\n<td>\u00a025, 40, 50, 63, 80, 100, 125<\/td>\n<\/tr>\n<tr>\n<td>Type<\/td>\n<td>Electromagnetic<\/td>\n<\/tr>\n<tr>\n<td>Type (wave form of the earth leakage sensed)<\/td>\n<td>AC, A, AC-G, A-G, AC-S and A-S are available<\/td>\n<\/tr>\n<tr>\n<td>Poles<\/td>\n<td>4 Pole<\/td>\n<\/tr>\n<tr>\n<td>Rated voltage Ue(V)<\/td>\n<td>400\/415<\/td>\n<\/tr>\n<tr>\n<td>Rated sensitivity I\u25b3n<\/td>\n<td>30mA,100mA,300mA are available<\/td>\n<\/tr>\n<tr>\n<td>Insulation voltage Ui (V)<\/td>\n<td>500<\/td>\n<\/tr>\n<tr>\n<td>Rated frequency<\/td>\n<td>50\/60Hz<\/td>\n<\/tr>\n<tr>\n<td>Rated breaking capacity<\/td>\n<td>6kA<\/td>\n<\/tr>\n<tr>\n<td>Rated impulse withstand voltage(1.2\/50) Uimp (V)<\/td>\n<td>6000<\/td>\n<\/tr>\n<tr>\n<td>Dielectric test voltage at ind. Freq. for 1 min<\/td>\n<td>2.5kV<\/td>\n<\/tr>\n<tr>\n<td>Pollution degree<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"7\">Mechanical<br \/>\nfeatures<\/td>\n<td>Electrical life<\/td>\n<td>2, 000<\/td>\n<\/tr>\n<tr>\n<td>Mechanical life<\/td>\n<td>2, 000<\/td>\n<\/tr>\n<tr>\n<td>Contact position indicator<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td>Protection degree<\/td>\n<td>IP20<\/td>\n<\/tr>\n<tr>\n<td>Reference temperature for setting of thermal element(\u2103)<\/td>\n<td>30<\/td>\n<\/tr>\n<tr>\n<td>Ambient temperature (with daily average \u226435\u2103)<\/td>\n<td>-5&#8230;+40<\/td>\n<\/tr>\n<tr>\n<td>Storage temperation (\u2103)<\/td>\n<td>-25&#8230;+70<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"6\">Installation<\/td>\n<td>Terminal connection type<\/td>\n<td>Cable\/U-type busbar\/Pin-type busbar<\/td>\n<\/tr>\n<tr>\n<td>Terminal size top\/bottom for cable<\/td>\n<td>25mm2\u00a0 , 18-3\/18-2 AWG<\/td>\n<\/tr>\n<tr>\n<td>Terminal size top\/bottom for Busbar<\/td>\n<td>10\/16mm2\u00a0\u00a0,18-8 \/18-5AWG<\/td>\n<\/tr>\n<tr>\n<td>Tightening torque<\/td>\n<td>2.5 N*m\u00a0 \/\u00a0 22 In-Ibs.<\/td>\n<\/tr>\n<tr>\n<td>Mounting<\/td>\n<td>On DIN rail EN 60715 (35mm) by means of fast clip device<\/td>\n<\/tr>\n<tr>\n<td>Connection<\/td>\n<td>From top or bottom<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"ksion-pdp__section ksion-pdp__section--tint\" id=\"selection\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">SELECTION GUIDE<\/p>\n<h2>Selecting a Type A or Type AC Residual Current Circuit Breaker<\/h2>\n<p>Specify the pole count, current, residual-current type, sensitivity, supply voltage and upstream protection when requesting a JCRD4-125 quotation from W9 Group.<\/p>\n<\/div>\n<div class=\"ksion-pdp__selection-grid\">\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">01<\/span><\/p>\n<h3>Match supply and poles<\/h3>\n<p>The listed pole options are 4P. Confirm supply voltage, neutral arrangement and the manufacturer\u2019s terminal diagram.<\/p>\n<\/article>\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">02<\/span><\/p>\n<h3>Choose type and sensitivity<\/h3>\n<p>Specify Type A or Type AC and the required residual-current sensitivity. Confirm the waveform and protection requirements of the circuit.<\/p>\n<\/article>\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">03<\/span><\/p>\n<h3>Coordinate overcurrent protection<\/h3>\n<p>Select a compatible MCB or fuse and request the manufacturer\u2019s short-circuit coordination data. The RCCB does not replace overcurrent protection.<\/p>\n<\/article>\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">04<\/span><\/p>\n<h3>Confirm the offered current<\/h3>\n<p>The reviewed current choices include 25, 40, 50, 63, 80, 100 A. Confirm the complete model code and rating for the quoted unit.<\/p>\n<\/article>\n<\/div>\n<div class=\"ksion-pdp__application-note\"><strong>Before specifying JCRD4-125:<\/strong> Confirm the exact order code, current, residual-current type and sensitivity, plus upstream short-circuit coordination. The table includes 125 A but the feature text says up to 100 A; confirm any 125 A offer with a matching datasheet.<\/div>\n<\/section>\n<section class=\"ksion-pdp__section\" id=\"evidence\">\n<div class=\"ksion-pdp__evidence-grid\">\n<div class=\"ksion-pdp__evidence-copy\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">ABOUT W9 GROUP<\/p>\n<h2>W9 Group RCCB Supply and Support<\/h2>\n<\/p><\/div>\n<p>Zhejiang W9 Group Technology Co., Ltd. supplies low-voltage electrical products. For a JCRD4-125 enquiry, contact W9 Group about configuration and matching product documents.<\/p>\n<div class=\"ksion-pdp__evidence-links\">\n          <a href=\"https:\/\/w9-group.com\/about-us\/\"><span>01<\/span><strong>About W9 Group<\/strong><em>Company profile and low-voltage product range<\/em><\/a><br \/>\n          <a href=\"https:\/\/w9-group.com\/oem-odm\/\"><span>02<\/span><strong>W9 Group OEM \/ ODM<\/strong><em>Ask about branding and configuration for your JCRD4-125 order<\/em><\/a><br \/>\n          <a href=\"https:\/\/w9-group.com\/technical-support\/\"><span>03<\/span><strong>Technical support<\/strong><em>Request model-specific selection and installation documents<\/em><\/a>\n        <\/div>\n<\/p><\/div>\n<figure class=\"ksion-pdp__evidence-media\">\n        <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/w9-group.com\/wp-content\/uploads\/2026\/07\/oem-circuit-protection-devices.webp\" alt=\"W9 Group OEM and ODM circuit protection product scope\" width=\"1000\" height=\"669\"><figcaption>W9 Group circuit-protection range \u2014 category illustration.<\/figcaption><\/figure>\n<\/p><\/div>\n<\/section>\n<section class=\"ksion-pdp__section ksion-pdp__section--tint\" id=\"resources\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">RELATED RESOURCES<\/p>\n<h2>JCRD4-125 RCCB Datasheet and Upstream Protection Information<\/h2>\n<p>Use W9 Group technical support and the product directory to specify JCRD4-125. Request a datasheet and wiring diagram matching the selected JCRD4-125 configuration.<\/p>\n<\/div>\n<div class=\"ksion-pdp__resource-list\">\n      <a href=\"https:\/\/w9-group.com\/technical-support\/\"><span>TECHNICAL SUPPORT<\/span><strong>Selection and product documentation<\/strong><em>Request the datasheet and connection drawing for the offered configuration<\/em><\/a><br \/>\n      <a href=\"https:\/\/w9-group.com\/products\/\"><span>PRODUCT DIRECTORY<\/span><strong>Explore W9 Group products<\/strong><em>Browse W9 Group models and request the specifications of the selected product<\/em><\/a><br \/>\n      <a href=\"https:\/\/w9-group.com\/download\/\"><span>DOCUMENTS<\/span><strong>W9 Group download centre<\/strong><em>Request the current document for your quoted JCRD4-125 variant<\/em><\/a>\n    <\/div>\n<\/section>\n<section class=\"ksion-pdp__section\" id=\"faq\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">BUYER FAQ<\/p>\n<h2>JCRD4-125 RCCB FAQs: 30mA Options and Overcurrent Coordination<\/h2>\n<p>Find answers about JCRD4-125 selection, configuration and ordering.<\/p>\n<\/div>\n<div class=\"ksion-pdp__faq-list\">\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Is JCRD4-125 an RCCB or an RCBO?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">It is listed as an RCCB: residual-current protection without integral overload and short-circuit protection. Use a coordinated MCB or fuse for those functions.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Which pole and supply arrangement is listed?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">This model is listed as 4P. The voltage choices appear in the specifications; confirm the selected voltage and neutral connection diagram in the offered datasheet.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Which residual-current sensitivities are available?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">W9 Group lists 30 mA, 100 mA and 300 mA options. Select the sensitivity for the required protection purpose and coordination.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">How do I specify Type A or Type AC?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">The source lists both options. State the connected equipment and required residual-current waveform response, and confirm the selected type in the quotation.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Does a 6kA figure mean the RCCB protects against overload?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">No. A short-circuit figure does not establish integral overcurrent protection. Confirm the conditional short-circuit rating and required upstream protective device.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">What installation details should be checked?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">The source lists 35 mm DIN-rail mounting and IP20 protection. Confirm terminal sizes, busbar compatibility, connection instructions and enclosure requirements.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">What is needed for a JCRD4-125 quotation?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">Send the required configuration, quantity, destination market and document requirements. Ask W9 Group to confirm price, minimum order quantity, samples and lead time for the selected configuration.<\/p>\n<\/details>\n<\/div>\n<\/section>\n<section class=\"ksion-pdp__section\" id=\"product-enquiry\">\n<div class=\"ksion-pdp__enquiry\">\n<div class=\"ksion-pdp__enquiry-copy\">\n<p class=\"ksion-pdp__eyebrow\">PRODUCT ENQUIRY<\/p>\n<h2>Request a JCRD4-125 RCCB Quotation<\/h2>\n<p>Tell W9 Group your pole count, current, residual-current type, sensitivity, supply voltage and upstream protection, quantity and destination market so the selected configuration can be identified.<\/p>\n<\/div>\n<p><a class=\"ksion-pdp__button ksion-pdp__button--primary\" href=\"https:\/\/w9-group.com\/contact-us\/\">Contact W9 Group<\/a><\/div>\n<\/section>\n<\/div>\n<style 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