MCB 2P 4.5KA 40A 110V/230V/400V Curve C Type AC Miniature Circuit Breaker


1. MCB is for non-professional operation by those untrained, and no maintenance is required.
2. Satisfying conditions and applications as mentioned above,MCB with “ON-OFF” indicating device is considered suitable for isolation function.
3. Particular devices such as surge protective devices,surge arrester etc are recommended to install at upstream line to MCB as precaution against potential surge voltage and current occurring at its power input side.
4. Appropriate tripping curve being chosen and properly installed, MCB trips and switches off its protected circuit in case of fault, and thus provides protection against electric shock.
5. B,C,D tripping curve(see graphics 1):

B cure:

– Instantaneous tripping current: 5In

– Instantaneous non-tripping current: 3In

– Application: provides protection to circuits with low inductive load

C curve:

– Instantaneous tripping current: 10In

– Instantaneous non-tripping current:5In

– Application:provides protection to circuits with inductive load or to highly inductive illumination system

D curve:

– Instantaneous tripping current.: 20In

– Instantaneous non-tripping current: 10In

– Application: provides protection to circuits with high inductive load or electric distribution system with high surge current

6.Ambient temperature and current rating curve


1. Protection against both overload and short circuit
2. Contact position indication
3. Applicable to terminal and pin/fork type Busbar connection
4. Easy mounting onto 35mm DIN rail

Type designation

MODEL:CJB 1N-63 (A)1P+N C 63CJEnterprise code
BMiniature Circuit Breaker
1NDesign Code.
63Frame rating rated current
(A)Breaking CapactityA:4.5kANo mark: 6kA
1P+NNumber of poles(1P/1P+N/2P/3P/3P+N/4P)
CInstantaneous trip characteristic type(B/C/D)
63Rated current (A)

Product Parameters

StandardIEC60898-1 GB/T10963.1
Rated Frequency(Hz)50/60 Hz
Frame Degree Rated Current(A)     Inm63A
Rated Current(A)      Ie1A/2A/3A/4A/5A/6A/10A/16A/20A/25A/32A/40A/50A/63A
Rated Voltage(V)     UeAC 230/400V(1P)AC 230(1P+N)AC 400(2P/3P/3P+N/4P)
Rated Insulation Voltage(V)     Ui690V
Rated Impact voltage(kV)      Uimp4kV
Rated short circuit breaking capacity(kA)    lcn6kA
Tripping CurveB(3In~5In)
Trip TypeThermal-magnetic
Electrical Life(times)10000 times
Mechanical Life(times)20000 times
IP GradeIP 20
Ambient temperature(℃)-35℃~+70℃
Installation altitude(m)No more than 2000m

 The main technical parameters of the product (see Table 1)

Product nameCJBIN-63ACJBIN-63
Electrical characteristics
Number of poles1P,1P+N,2P,3P,3P+N,4P(N pole can be opened and closed)1P, 1P+N,2P,3P,3P+N,4P(N pole can be opened and closed)
Rated frequency (Hz)50/6050;60
Frame rating current (A) Inm6363
Raied current (A) le1,2,3,4,5,6,10,16, 20,25,32,40,50,631,2, 3, 4, 5,6, 10,16,20,25,32,40,50,63
Rated voltage (V) UeAC230/400(1P)AC230(1P+N)AC400(2P, 3P, 3P十N, 4P)“AC230/400(1P)AC230 (1P+N)AC400(2P,3P, 3P十N,4P)
Rated insulation voltage (V) Ui690690
Rated impulse withstand voltage (kV) I Jimp44
Rated short-circuit breaking capacity (kA) lcs4.56
Rated short-circuit breaking capacity (kA) lcn4.56
Instantaneous trip characteristicsB(3In〜5In)C(5In~ 10In)D(10In〜14In)B(3In〜5In)C(5In-10In)D(10In-14In)
Trip formThermal magnetic tripThermal magnetic trip
Pollution level22
Eleclrical and mechanical accessoriesMX: Shunt releaseOF: Auxiliary contactSD: Alann contactMX+OF: Shunt release + auxiliary contactMV: Overvoltage releaseMN: Undcrvoltage releaseMV+MN: Overvoltage and undcrvoliagc releaseMNS: No-voltage release
Mechanical properties

Products Description

Residual Current ProtectionElectrical SafetyFire-proof BodyProtect circuit from fire caused by circuit falseCold and Heat-resistant -5℃-40℃
Reliable and Long-lasting2000 Electrical Cycles4000 Mechanical CyclesVisualized IndicationClear View of On-Off Status


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