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Home > Products > Miniature Circuit Breaker > KNB1-63 Miniature Circuit Breaker > Miniature Circuit Breaker 4.5KA 63A with SIRIM
Miniature Circuit Breaker 4.5KA 63A with SIRIM
Miniature Circuit Breaker 4.5KA 63A with SIRIM
Miniature Circuit Breaker 4.5KA 63A with SIRIM
Miniature Circuit Breaker 4.5KA 63A with SIRIM
  • Miniature Circuit Breaker 4.5KA 63A with SIRIM
  • Miniature Circuit Breaker 4.5KA 63A with SIRIM
  • Miniature Circuit Breaker 4.5KA 63A with SIRIM
  • Miniature Circuit Breaker 4.5KA 63A with SIRIM

Miniature Circuit Breaker 4.5KA 63A with SIRIM

    Unit Price: USD 0.54 / Bag/Bags
    Payment Type: T/T
    Incoterm: FOB,CFR
    Min. Order: 2400 Bag/Bags
    Delivery Time: 30 Days

Basic Info

Model No.KNB1-63

Breaking CapacityLow Voltage Circuit Breakers

OperationManual Type

SpeedHigh-Speed Circuit Breaker

Arc-extinguishing MediumAir



Poles Number1

TypeCircuit Breaker

FunctionCircuit-Breaker Failure Protection


Rated Working Current1 2 3 4 6 10 16 20 25 32 40 50 63A

Electric Life4000


Mechanical Life20000

Rated Voltage240V


Making And Breaking Capacity4KA/6KA

Additional Info




Payment TypeT/T


Delivery Time30 Days

Product Description

KNB1-63 series Miniature Circuit Breaker is nice in appearance, reasonable in structure, sound in feature and high in breaking capacity. Installed with standard din rail, it is convenient and easy in usage. It is mainly used in the line of AC 50/60Hz, rated working voltage to 240V/415V, and rated current to 63A as protection against overload and short-circuit. It can be used as infrequent on-and-off operation and changeover.
KNB1-63 Miniature Circuit Breaker MCB It complies with standard of GB10963 and IEC/EN60898.

Electronics Miniature Circuits Breaker
Automatic Miniature Circuit Breaker
Mini Circuit Breaker

The over-current tripping unit protection feature

Sequence NO . Release Test current I/In Start state Tripping time Expected restlt
1 B,C,D 1.13In Cold state t≤1h Not tripping
2 B,C,D 1.45In Start right after
the serial NO .
1 test
t<1h Tripping
3 B,C,D 2.55In Cold state 1s Tripping







Cold state t≤0.1s Not tripping







Cold state t<0.1s Tripping

Basic specification and main parameters

Frame class 63A
Rated working voltage 240V/415V
Rated frequency 50/60Hz
Rated working current 1,3,6,10,16,20,25,32,40,50,63A
Making and breaking capacity 6000A(6~40A),4500A(50,63A)
Release type B,C,D
Poles 1,2,3,4P
Mechanical life 20000
Electric life 4000

Dimensions(mm) Characteristics curve

B1-63 SS

Mini Circuit Breaker

Company Overview
Wenzhou korlen electric appliances co., ltd. is a joint venture. My company is a manufacturer including design, development, produce and sale, professional producing MCB, MCCB,RCCB,RCBO and AC contactor etc. product enterprise. The company owns import and export power of self-run, expanding Europe and South America, Middle East, Southeast Asia etc. market, set a good public praise.
The company have more than 1500 workers, including senior engineer among them, engineer at inside of more than 100 technician. And then set up to cover area more than 50 acres, construct area is more than 38000 square meters of the modern industrial zone, providing with the forerunner's standard laboratory and various examination equipments. Under korlen people to make great effort unremittingly, designed and developed by oneself, develop and produce the series of mcb, rccb filled up local blank, attain inter-national advanced level, and acquire more than 20 national patents.
The company acquires "30 strong eminent enterprises, top ten of export income, yueqing star class enterprise, attach importance to contract and keeps promise" title of honor for many times past years. Company still the initiative pass ISO 9001 management system verification and 14001 environments management system verification.
Our product passed quality verification of domestic and international authority organization like the CB. SEMKO. NF. SIRIM. SNI. CE .PCT. TSE, In the meantime high breaking capacity breaker of our company in this city is the unique product which got [ yueqing famous brand product" by yueqing people government. Korlen electric appliances is willing to make friends with social public, the world outside businessman join hands together for prosperous society and development to build a brighter future.
Company Photos

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