CQB7DC-63 Series DC Miniature Circuit Breakers

Product Overview

These DC MCBs are perfect for DC distribution systems with a rated voltage up to 1000V and a rated current up to 63A, featuring a rated short – circuit breaking capacity of up to 6000A. They work as protection devices in distribution circuits for infrequent connection, disconnection, and switching. With overload and short – circuit protection, plus auxiliary function modules like auxiliary contacts and alarm – indicating contacts, they’re widely used in communication industry’s main cabinets, power cabinets, distribution cabinets, and outdoor cabinets.

Our CQB7DC-63 series stands out due to advanced technology and strict quality control. Using cutting – edge equipment and following strict quality standards, we ensure each unit performs reliably. We understand international clients’ unique needs and offer flexible customization from product design to packaging. Our efficient processes and quality systems ensure timely delivery of high – quality products, helping clients compete globally.

Overview and applications

The rated operating voltage of CQB7DC-63 series DC miniature circuit breakers can reach DC 1000V, and the rated operating current can reach 63A, which are used for isolation, overload and short circuit protection. It is widely used in photovoltaic, industrial, civil,communication and other systems, and can also be used in DC systems to ensure the reliable operation of DC systems.

Standards: IEC/EN 60947-2, EU ROHS environmental protection requirements.

Technical data

Specifications
Rated voltage (V)	1P、2P、3P、4P
Rated current(A)	6A、10A、13A、16A、20A、25A、32A、40A、50A、63A
Rated insulation voltage (V)	DC1000
Ultimate breaking capacity (KA)	6
Operational breaking capacity (KA)	6
Tripping curves	Type B(4In±20%),Type C(8In±20%)
Mechanical life	10000
Electrical life	1500
Wiring capacity	≤25mm²
Tightening torque (N·m)	3.0
Protection class	IP20
Standards	GB/T14048.2
Compliant certification	CCC

Table1 Tripping characteristics(Reference temp.30℃)

Item	Tripping Curve	Test current In(A)	Initial Status	Time limit for tripping or non-tripping	Expected result	Remarks
a	C	1.05ln	Cold	t≤1h	Non-tripping
b	C	1.3ln	Following previous test	t<1h	Tripping	Current smoothly rises to specified value in 5s
c	C	2.55ln	Cold	1s<t<60s(ln≤32A) 1s<t<120s(In>32A)	Tripping
d	C	6.4ln	Cold	t≤0.1s	Tripping	Switch on the power supply by closing the auxiliary switch
e	C	9.6ln	Cold	t<0.1s	Tripping	Switch on the power supply by closing the auxiliary switch

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

Tripping curves

Dimensions(unit:mm)

Order Specifications

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

A) Product models, such as CQB7DC-63;

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

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

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

E) Order quantity,such as 100pcs

2.Purchase order template

CQB7DC-63 2P C/16A 100pcs