Wenzhou Kangyu Electrical Co.,LTD

Kangyu Electrical has 18 years of experience in low-voltage electric production

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Miniature Circuit Breaker Supplier

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Company profile

Founded in 2002, Wenzhou Kangyu Electric Co., Ltd. is a professional manufacturer of combination box and photovoltaic module products, such as array monitors, surge protectors and other special contactors, AC / DC magnetic contactors, DC circuit breakers. And molded case circuit breakers, etc. Xinguang Industrial Zone, Liushi Town, Wenzhou City, with convenient transportation.





Product Description

Miniature Circuit Breaker 25NC

Miniature Circuit Breaker Supplier_Miniature Circuit Breaker


For protecting equipment against overload and short circuit

1.2General rules for choosing MCB

Technicala data of the network at the point considered:

The earthing systems(TNS,INC),Shrot-circuit current at the circuit-breaker installatino point,which must always be less than the breaking capacity of this device,Networl normal voltage.

  Standard   IEC/EN 60947-2
Electrical features Rated current In A 63,80,100,125
  Poles   1P,2P,3P,4P
  Rated voltage Ue V 230/400
  Insulation voltage Ui V 500
  Rated frequency Hz 50/60
  Rated breaking capacity Ka 6~10
  Rated impulse withstand voltage(1.2/50)Uimp V 6000
  Dielectric test voltage at ind.Freq.for 1 min Kv 2.5
  Pollution degree   3
  Thermo-magnetic release characteristic   8-12In
Mechanical Electrical life   1500(In=63A,80A,100A)
features     1000(In=125A)
  Mechanical life   8000(In=63A,80A,100A)
  Contact position indicator   Yes
  Pollution degree   IP20
  Standard   IEC/EN 60947-2
  Reference temperature for 30
  setting of thermal element    
  Ambient temperature -5...+40
      (Special application please refer to P29 
Combination (with daily average≤35℃)   for temperature compensation correction)
with Storage temperation Terminal connection type -25..+70
sccssorles     Cable/pin-type busbar
  Terminal size top/bottom for cable mm2 50
    AWG 18-1/0
  Terminal size top/bottom for busbar mm2 50
    AWG 18-1/0
  Tightening torque N*m 3.5
    In-Ibs. 3.1
  Mounting   On DN rail EN 60715(35mm)
      by meas of fast clip device 
  Connection   From top 
  Auxilary contact    
  Auxilary contact   Yes


Modified C65 MCB

Miniature Circuit Breaker Supplier_Modified C65 MCB


CKYL1-63 RCCB is in conformity with the standard of IEC61008. The RCCB can cut off the fault circuit immediately on the occasion of shock hazard or earth leakage of trunk, thus, it is suitable to avoid the shock hazard and fire caused by earth leakage.

The RCCB is mainly suitable for use in varieties of plants and enterprises, building construction 1 phase 230V and 3 phase 400V 50/60Hz. RCCB is not suitable for use in DC pulse system.


Product name 30ma rccb 4.5ka 6ka elcb 4 pole earth leakage circuit breaker
Number of Poles 1P+N,3P+N
Rated Current(A) 16,20,25,40,50,63
Rated Residual Operating Current(IΔn)(mA) 30100300500
Rated Voltage(V) AC 230/240
Residual Operating Current Scope 0.5IΔn~IΔn
Residual Current Off-time ≤0.3S
Short Circuit Capacity(Icu) 6000A
Endurance 4000
Protection Degree IP20


  • Circumstance temperature-5°C~+40 ,average temperature not exceeding 35 .
  • Altitude above sea level less than 2000m.
  • Humidity not exceeding 50% at 40°Cand not exceeding 90% at 25°C.
  • Installation class Ⅱ or Ⅲ.
  • Pollution class Ⅱ.
  • Installation method DIN Rail mounting type.
  • The external magnetism shall not be more than 5 times of terrestrial one.
  • Product shall be installed vertically at the place where there shall be no severe impact and
  • vibration. The product is switched on when the handle is at upper position.  
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