CQB3-63 Series 50Hz/60Hz AC Miniature Circuit Breaker

Overview and applications

The CQB3-63 series miniature circuit breaker, crafted by CHAC Electric, is designed to fulfill the customization needs of international clients in low – voltage electrical systems. As a professional contract manufacturer with extensive export experience, we excel in ODM/OEM services.

Our CQB3-63 series highlights advanced technology and strict quality control. Leveraging cutting – edge equipment and stringent quality standards, we guarantee reliable performance. We understand international clients’ unique requirements and offer flexible customization from product design to packaging. Our efficient processes and quality systems ensure timely delivery of high – quality products, empowering clients to thrive in the global market.

1.Wide-frequency compatibility

2.High voltage/current

3.High breaking capacity

4.High Interruption rating capabilities.

5.Overload & short circuit protection

6.Positive isolation

Suitable for industrial, commercial, high-rise and civil residences circuit protection.

Technical data

Specifications
Insulation voltage	500V
Rated impulse withstand voltage Uimp	4000V
Rated current(A)	6、10、16、20、25、32、40、50、63
Rated frequency	50Hz/60Hz
Number of poles	1P、1P+N、2P、3P、3P+N、4P
Rated breaking capacity Icn=lcs(A)	6000A
Mechanical & Electrical life	Mechanical≥10000,Electrical≥6000
Tripping curves	B、C、D
Grid distance	45mm
Protection class	IP20
Standards	IEC60898-1、GB/T10963.1
Tripping curves	CCC

Table1 Tripping characteristics (Reference temp.30°C)

Item	Type	Test current In(A)	Initial Status	Time limit for tripping or non-tripping	Expected result	Remarks
a	B、C、D	1.13ln	Cold	t≤1h	Non-tripping	Current smoothly rises to specified value in 5s
b	B、C、D	1.45ln	Following previous test	1h	Tripping
c	B、C、D	2.55ln	Cold	1s<t<60s(In≤32A) 1s<t<120s(In>32A)	Tripping
d	B	3ln	Cold	t≤0.1s	Non-tripping	Switch on the power supply by closing the auxiliary switch
	C	5In
	D	10In
e	B	5In	Cold	t<0.1s	Tripping	Switch on the power supply by closing the auxiliary switch
	C	10ln
	D	20ln

Note: The term “cold” means that the test is carried out at a reference calibration temperature without load before the test.

Tripping curves

Conductor requirements and cross section

Copper cross-section(mm²)	Rated current In(A)
1	In≤6
1.5	6<In≤13
2.5	13<In≤20
4	20<In≤25
6	25<In≤32
10	32<In≤50
16	50<In≤63

Dimensions (unit:mm)

Order Specifications

1.When ordering circuit breakers, the following points should be specified:

A) Product models, such as CQB3-63;

B) Poles of circuit breakers, such as 1P、1P+N、2P、3P、3P+N、4P;

C) Types of instantaneous tripping,such astype B/C/D;

D) Rated current of circuit breakers, such as 16A、20A、25A;

E) Order quantity,such as100pcs

2.Purchase order template

CQB3-63 2P C/16A 100pcs