{"id":3408,"date":"2026-03-22T09:00:00","date_gmt":"2026-03-22T01:00:00","guid":{"rendered":"https:\/\/eqsvq3fzct.wpdns.site\/blog\/enhance-electrical-safety-with-the-mcb-jcb3-80h\/"},"modified":"2026-10-24T14:20:53","modified_gmt":"2026-10-24T06:20:53","slug":"mcb-jcb3-80h%e3%81%a7%e9%9b%bb%e6%b0%97%e5%ae%89%e5%85%a8%e6%80%a7%e3%82%92%e5%90%91%e4%b8%8a","status":"publish","type":"post","link":"https:\/\/w9-group.com\/ja\/blog\/enhance-electrical-safety-with-the-mcb-jcb3-80h\/","title":{"rendered":"MCB JCB3-80H\u3067\u96fb\u6c17\u5b89\u5168\u6027\u3092\u5411\u4e0a"},"content":{"rendered":"

JCB3-80H specification matrix<\/h2>\n
\n\n\n\n\n\n\n\n\n\n
\u30d5\u30a3\u30fc\u30eb\u30c9<\/th>\nReviewed listing<\/th>\nConfirm for the order<\/th>\n<\/tr>\n<\/thead>\n
Current<\/td>\n1\u201380 A<\/td>\nExact step and code<\/td>\n<\/tr>\n
Breaking rating<\/td>\n10 kA version<\/td>\nVoltage and applicable declaration<\/td>\n<\/tr>\n
\u30ab\u30fc\u30d6<\/td>\nB\/C\/D<\/td>\nCorresponding time-current curve<\/td>\n<\/tr>\n
\u30dd\u30fc\u30e9\u30f3\u30c9\u4eba<\/td>\nSingle through four-pole options<\/td>\nActual neutral and phase arrangement<\/td>\n<\/tr>\n
\u4fdd\u8b77<\/td>\n\u904e\u8ca0\u8377\u304a\u3088\u3073\u77ed\u7d61<\/td>\nSeparate residual-current requirements<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n\n\n\n\n\n
Proposed use<\/th>\nMain check<\/th>\n<\/tr>\n<\/thead>\n
\u30e2\u30fc\u30bf\u30fc\u90e8\u9580<\/td>\nStarting envelope and curve<\/td>\n<\/tr>\n
Distribution board<\/td>\nTerminals and assembly acceptance<\/td>\n<\/tr>\n
\u6545\u969c\u30ec\u30d9\u30eb\u304c\u9ad8\u3044<\/td>\nApplicable interruption rating<\/td>\n<\/tr>\n
Electronic equipment<\/td>\nAny required RCD arrangement<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u30ec\u30d3\u30e5\u30fc\u3092 \u5c0f\u578b\u906e\u65ad\u5668\u306e\u30e9\u30a4\u30f3\u30ca\u30c3\u30d7<\/a> \u8ca0\u8377\u8ca0\u8377\u91cf\u3001\u30dd\u30fc\u30eb\u914d\u7f6e\u3001\u304a\u3088\u3073\u969c\u5bb3\u30ec\u30d9\u30eb\u8abf\u67fb\u306b\u57fa\u3065\u3044\u3066\u3002.<\/p>\n

\"jcb3-80h-3.webp\"<\/p>\n

Check the JCB3-80H rating against the board<\/h2>\n

W9’s current listing identifies 1\u201380 A options, B\/C\/D curves and a 10 kA version. Compare the applicable rating at the actual voltage with the prospective \u77ed\u7d61\u96fb\u6d41<\/strong>. Do not assume a higher headline kA value makes the device a universal replacement for another MCB.<\/p>\n

The exact pole arrangement, terminal system, busbar geometry and assembly requirements must also fit. Select the curve using starting behaviour and fault-disconnection calculations. If the circuit requires \u6b8b\u7559\u96fb\u6d41\u4fdd\u8b77<\/strong>, the MCB label does not supply it.<\/p>\n

\u73fe\u4ee3\u306e\u6025\u901f\u306a\u4e16\u754c\u3067\u306f\u3001\u96fb\u6c17\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5168\u6027\u3068\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u5bb6\u5ead\u7528\u8a2d\u5099\u3084\u7523\u696d\u7528\u96fb\u529b\u914d\u96fb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3044\u3066\u3001MCB\uff08\u6a5f\u68b0\u5f0f\u906e\u65ad\u5668\uff09\u306f\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002 JCB3-80H<\/a> \u5c0f\u578b\u906e\u65ad\u5668\u306f\u4fe1\u983c\u6027\u304c\u3042\u308a\u52b9\u7387\u7684\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u3059\u3002\u77ed\u7d61\u304a\u3088\u3073\u904e\u8ca0\u8377\u4fdd\u8b77\u6a5f\u80fd\u3068\u6700\u592710kA\u306e\u65ad\u9762\u7a4d\u3092\u5099\u3048\u305f\u3053\u306e\u906e\u65ad\u5668\u306f\u3001\u5b89\u5fc3\u611f\u3092\u63d0\u4f9b\u3057\u3001\u96fb\u6c17\u6a5f\u5668\u3092\u6f5c\u5728\u7684\u306a\u5371\u967a\u304b\u3089\u4fdd\u8b77\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n

MCB JCB3-80H\u306f\u30011A\u304b\u308980A\u306e\u5e45\u5e83\u3044\u96fb\u6d41\u7bc4\u56f2\u3092\u5099\u3048\u3001\u5e45\u5e83\u3044\u7528\u9014\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u30021\u30dd\u30a4\u30f3\u30c4\u30012\u30dd\u30a4\u30f3\u30c4\u30013\u30dd\u30a4\u30f3\u30c4\u3001\u304a\u3088\u30734\u30dd\u30a4\u30f3\u30c4\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u3088\u308a\u3001\u591a\u7a2e\u591a\u69d8\u306a\u8a2d\u7f6e\u30cb\u30fc\u30ba\u306b\u5bfe\u5fdc\u3059\u308b\u6c4e\u7528\u6027\u304c\u3055\u3089\u306b\u5f37\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001B\u3001C\u3001\u307e\u305f\u306fD\u306e\u30ab\u30fc\u30d6\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001\u7279\u5b9a\u306e\u8981\u4ef6\u306b\u57fa\u3065\u3044\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u304c\u53ef\u80fd\u3067\u3001\u3055\u307e\u3056\u307e\u306a\u96fb\u6c17\u74b0\u5883\u306b\u304a\u3044\u3066\u6700\u9069\u306a\u6027\u80fd\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u3053\u306e\u67d4\u8edf\u6027\u306b\u3088\u308a\u3001MCB JCB3-80H\u306f\u5e45\u5e83\u3044\u96fb\u6c17\u8a2d\u7f6e\u7528\u9014\u306b\u6700\u9069\u306a\u591a\u7528\u9014\u304b\u3064\u9069\u5fdc\u6027\u306e\u9ad8\u3044\u9078\u629e\u80a2\u3068\u306a\u308a\u307e\u3059\u3002.<\/p>\n

\u56fd\u969b\u57fa\u6e96\u3078\u306e\u6e96\u62e0\u306f\u3042\u3089\u3086\u308b\u96fb\u6c17\u90e8\u54c1\u306e\u91cd\u8981\u306a\u8981\u7d20\u3067\u3042\u308a\u3001MCB JCB3-80H\u306f\u3053\u306e\u70b9\u306b\u304a\u3044\u3066\u5353\u8d8a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u88fd\u54c1\u306fIEC 60898-1\u898f\u683c\u306b\u6e96\u62e0\u3057\u3066\u304a\u308a\u3001\u53b3\u3057\u3044\u96fb\u6c17\u5b89\u5168\u6027\u80fd\u57fa\u6e96\u3092\u6e80\u305f\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a8d\u8a3c\u306fMCB JCB3-80H\u306e\u4fe1\u983c\u6027\u3068\u54c1\u8cea\u3092\u88cf\u4ed8\u3051\u3001\u96fb\u6c17\u30b7\u30b9\u30c6\u30e0\u306e\u52b9\u679c\u7684\u306a\u4fdd\u8b77\u80fd\u529b\u306b\u5bfe\u3059\u308b\u4fe1\u983c\u6027\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002.<\/p>\n

MCB JCB3-80H<\/a> miniature circuit breaker is a robust and reliable solution for ensuring electrical safety in a wide range of applications. Its comprehensive features, including short-circuit and overload protection, high \u7834\u58ca\u80fd\u529b<\/strong>, contact indicators, and compliance with international standards, make it ideal for domestic, commercial, and industrial installations. With its versatility, reliability, and unwavering adherence to stringent standards, the MCB JCB3-80H fully embodies our commitment to electrical safety and performance.<\/p>\n

\n

\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n

Does JCB3-80H include earth-leakage detection?<\/h3>\n

Its listed MCB functions are overload and short circuit. Provide the required residual-current arrangement separately.<\/p>\n

Is the listed 10 kA value enough for every board?<\/h3>\n

No. Confirm its voltage and applicable product declaration, then compare with the installation fault level and any approved backup arrangement.<\/p>\n

Can I change the curve to prevent a motor-start trip?<\/h3>\n

Only after reviewing starting current, conductors and fault-disconnection requirements. A higher pickup threshold can change protection performance.<\/p>\n

What should be checked before replacing another MCB?<\/h3>\n

Verify ratings, curve, poles, terminals, busbars and assembly acceptance. Matching rail mounting and amperes is insufficient.<\/p>\n<\/section>\n

\u53c2\u8003\u6587\u732e<\/h2>\n