CJM8-63 4P 4.5kA MCB Miniature Circuit Breaker with Household Failure Protection

CJM9-63 Type miniature circuit breaker(MCB)is mainly used for protection against overload and the short circuit under the AC 50Hz/60Hz, rated voltage 230V/400V, and rated current from 1A to 63A. It also can be used for non-frequent on-and-off switch operations under normal circumstances.

Products Details

Construction and Feature 

  • Protection against both overload and short circuit
  • High short-circuit capacity
  • Easy mounting onto 35mm DIN rail
  • Terminal electric devices shall be mounted on Din rail of TH35-7.5D type.
  • High short-short capacity 4.5KA.
  • Designed to protect circuit carrying big current up to 63A.
  • Contact position indication.
  • Used as main switch in household and similar installation.

Normal Service Condition

  • Altitude above sea level less than 2000m;
  • Ambient temperature -5~+40, average temperature not exceeding +35 within 24 hours;
  • Relative Humidity not exceeding 50% at maximum temperature +40 higher relative humidity allowed at lower temperature. For example, relative humidity 90% allowed at +20;
  • Pollution class: II (means generally only non-electricity conducting pollution is considered, and also considers temporary electricity conducting pollution occasionally caused by condensed dew);
  • Perpendicular installation with allowed tolerance  5.

Technical Data

Standard IEC/EN 60898-1
Rated Current 6A,10A,16A,20A,25A,32A,40A,50A,63A
Rated Voltage 230/400VAC(240/415)
Rated Frequency 50/60Hz
Number of Pole 1P,2P,3P,4P(1P+N,3P+N)
Module size 18mm
Curve type B,C,D Type
Breakering capacity 4500A
Optimumoperating temperature -5ºC to 40ºC
Terminal Tightening torque 5N-m
Terminal Capacity(top) 25mm²
Terminal Capacity(bottom) 25mm²
Electro-mechanical endurance 4000cycles
Mounting 35mm DinRail
Suitable Busbar PIN Busbar
Test Tripping Type Test Current Initial State Tripping timeor Non-tripping Time Provisior
a Time-delay 1.13In Cold t≤1h(In≤63A) No Tripping
b Time-delay 1.45In After test a t<1h(In≤63A) Tripping
c Time-delay 2.55In Cold 10s<t<60s(In≤63A) Tripping
d B curve 3In Cold t≤0.1s No Tripping
C curve 5In Cold t≤0.1s No Tripping
D curve 10In Cold t≤0.1s No Tripping
e B curve 5In Cold t≤0.1s Tripping
C curve 10In Cold t≤0.1s Tripping
D curve 20In Cold t≤0.1s Tripping
Miniature Circuit Breaker  (9)

Contact us

Please feel free to give your inquiry in the form below We will reply you in 24 hours