CQB2H-63 Series 63A Miniature Circuit Breaker
Our CQB2H-63 series combines advanced technology with strict quality control to ensure long-term reliability and durability, making it an ideal choice for a broad range of electrical protection applications.
Product Overview
The CQB2H-63 series miniature circuit breaker is designed by CHAC Electric for distribution protection in AC 50Hz (or 60Hz) systems with a rated voltage of 230/400V and a rated current up to 63A. With a rated short-circuit breaking capacity of up to 10000A, it provides reliable protection for electrical distribution lines against overload and short-circuit faults. The breaker also features isolation protection and can be used for infrequent connection, disconnection, and switching of circuits. It is widely applicable in terminal distribution scenarios across various industries such as construction, new energy, power, and infrastructure. Our CQB2H-63 series combines advanced technology with strict quality control to ensure long-term reliability and durability, making it an ideal choice for a broad range of electrical protection applications.
Product Features
CQB2H-63
■ Overload & short circuit protection
■ Positive isolation
■ High breaking capacity up to 10KA
■ Comprehensive range of accessories suitable for subsequent installation
■ Suitable for industrial, commercial, high-rise and civil residences circuit protection.
CQB2HL-63
■ High performance: 10kA breaking capacity for reliable protectifon
■ Precise matching: B/C/D tripping curves for different loads
■ Multiple options: 30-300mA five-level sensitivity selection
■ Long lifespan: 20,000 mechanical operations ensure durability
■ Full protection: IP20 rating for various environments
Ordering Specification
CQB2H-63
Please specify the following when ordering:
1.Product Model: CQB2H-63
2.Number of Poles: 1P, 2P, 3P,4P
3.Tripping Curve&Rated Current:[e.g.:C/32A]
- Tripping Curve:B, C, D
- Rated Current (In): 6A, 10A, 16A, 20A, 25A, 32A, 40A,50A,63A
4.Quantity: [e.g.: 100 pcs]
Ordering Example:
CQB2H-63 2P C/32A 100 pcs
CQB2HL-63
Please specify the following when ordering:
1.Product Model: CQB2HL-63
2.Poles & Residual Operating Current: [e.g.: 2P / 30mA]
- Number of Poles: 1P+N, 2P,3P,3P, 3P+N, 4P
- Rated Residual Operating Current (IAn): 30mA, 50mA,100mA,300mA
3.Tripping Curve&Rated Current:[e.g.:C/32A]
- Tripping Curve: B, C, D
- Rated Current (In): 6A, 10A, 16A, 20A, 25A, 32A, 40A,50A,63A
4.Quantity: [e.g.: 100 pcs]
Ordering Example:
CQB2HL-63 2P C/32A 30mA 100 pcs
Type designation
CQB2H-63
CQB2HL-63
Tripping curves
CQB2H-63
CQB2HL-63
Dimensions(unit:mm)
CQB2H-63
CQB2HL-63
Technical Specifications
CQB2H-63
| Parameter | |
| Rated voltage | 230V/400V (1P), 400V~ (2P/3P/4P) |
| Rated current | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Number of poles | 1P, 2P, 3P, 4P |
| Rated short circuit breaking capacity Icn | 10000 A |
| Mechanical & Electrical life | Mechanical ≥ 20000, Electrical ≥ 6000 |
| Tripping characteristics | B, C, D |
| Tightening torque (N·m) | 3.5 |
| Pollution degree | 2 |
| Degree of protection | IP20 |
| Overvoltage category | Ⅱ, Ⅲ |
| Standards | IEC 60898-1, GB/T 10963.1 |
CQB2HL-63
| Parameter | |
| Rated voltage | 230V~ (1P+N, 2P), 400V~ (3P, 3P+N, 4P) |
| Rated current | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Rated tripping current I△n | 30mA, 50mA, 75mA, 100mA, 300mA |
| Number of poles | 1P+N, 2P, 3P, 3P+N, 4P |
| Rated breaking capacity Icn | 10000 A |
| Mechanical & Electrical life | Mechanical ≥ 20000, Electrical ≥ 6000 |
| Tightening torque (N·m) | 3.5 |
| Pollution degree | 2 |
| Degree of protection | IP20 |
| Overvoltage category | Ⅱ,Ⅲ |
| Tripping characteristics | 2 |
| Standards | IEC 61009-1, GB/T 16917.1 |
| Certification | CCC |
Table1 Tripping characteristics (Reference temp.30℃)
CQB2H-63
| Item | Tripping Curve | Test current In(A) | Initial Status | Time limit for tripping or non-tripping | Expected result | Remarks |
| a | B, C, D | 1.13In | Cold | t ≤ 1h | Non-tripping | Current smoothly rises to specified value within 5s |
| b | B, C, D | 1.45In | Following item a test | t < 1h | Tripping | |
| c | B, C, D | 2.55In | Cold | 1s < t ≤ 60s (In ≤ 32A) 1s < t ≤ 120s (In > 32A) |
Tripping | |
| d | B | 3In | 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 | 10In | |||||
| D | 20In |
CQB2HL-63
| Item | Tripping Curve | Test current In(A) | Initial Status | Time limit for tripping or non-tripping | Expected result | Remarks |
| a | B, C, D | 1.13In | Cold | t ≤ 1h | Non-tripping | Current smoothly rises to specified value within 5s |
| b | B, C, D | 1.45In | Following item a test | t < 1h | Tripping | |
| c | B, C, D | 2.55In | Cold | 1s < t ≤ 60s (In ≤ 32A) 1s < t ≤ 120s (In > 32A) |
Tripping | |
| d | B | 3In | Cold | t ≤ 0.1s | Non-tripping | Switch on the power supply by closing the auxiliary switch |
| d | C | 5In | ||||
| d | D | 10In | ||||
| e | B | 5In | Cold | t < 0.1s | Tripping | Switch on the power supply by closing the auxiliary switch |
| e | C | 10In | ||||
| e | D | 20In |
Note: The term “cold” means that the test is carried out at a refererce calibration temperature without load before the test
Conductor requirements and cross section
CQB2H-63
| 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 |
CQB2HL-63
| 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 |
Why Choose CHAC
With 30+ years of manufacturing experience, 1100+ employees, 100M+ poles
annual capacity and 90% automated production, CHAC provides stable production capacity and strict
quality control for global OEM/ODM customers. Our in-house manufacturing system supports long-term
cooperation for electrical brands, importers and distributors.
30+
YEARS EXPERIENCE
Specialized in low-voltage electrical manufacturing
1100+
EMPLOYEES
Professional team ensures stable quality and delivery
100M+
POLES ANNUAL CAPACITY
Large-scale production capacity to meet global demand
90%
AUTOMATED PRODUCTION
Advanced automation for high efficiency and consistency
Automated Assembly Line
Testing Laboratory
Injection & Stamping
Quality Inspection
Strict quality control system ensures every product meets global standards.
What Can We Customize?
We support customization across branding, packaging, product appearance,
electrical specifications, certification requirements and engineering development. Whether customers
need private label products, market-specific parameters or new product development, CHAC can provide
flexible solutions based on project requirements.
Logo & Branding
Custom logo printing, laser marking and nameplate solutions.
Packaging
Customization
Customized color boxes, cartons, labels and manuals.
Electrical
Customization
Current, voltage, breaking capacity, trip curve and other
special functions.
Product
Appearance
Housing color, handle color and appearance customization.
Certification
Support
Products comply with international standards and market
requirements.
Engineering
Development
Drawing evaluation, prototype testing and mass production.
Download
CQB2 Series Miniature Circuit Breaker
Complete product overview for low-voltage electrical components and product selection reference.
Need Technical Documents?
Contact us for datasheets, certificates, drawings, selection guidance or OEM/ODM project support.
Frequently Asked Questions
Q1. Do you support product customization based on our design requirements?
A1:Absolutely. We specialize in OEM and ODM cooperation in the low-voltage electrical field and have provided customized services for many internationally renowned companies. We offer full-process support, including R&D design, parameter adjustments, and special material selection, ensuring the product fully meets your requirements.
Q2: What is your production capacity and Minimum Order Quantity (MOQ)?
A2: We operate a highly automated production base with an annual output of over 100 million poles for miniature circuit breakers. Our MOQ policy is flexible. We can provide competitive trial orders for small batches and dedicated production capacity guarantee plans.
Q3: What assurances are there for product quality and certifications?
A3: Our main products are certified with CCC, CE, CB, and more, and are sold in over 30 countries and regions worldwide. The company has established a dedicated Quality Operations Center that works with the business and production departments to implement full-process quality control, ensuring products meet international standards.
Q4: Do you have the capability for product R&D and turning concepts into reality?
A4: We have a complete R&D team and digital workshops, backed by extensive customization experience serving numerous international clients. From concept proposal and sample development to mass production, we provide end-to-end technical support to help bring your ideas to life.
