CQB3LE-63 Series Electronic Leakage Miniature Circuit Breaker
CQB3LE-63 series residual current operated circuit breakers are suitable for circuits with AC 50Hz, rated voltage up to 230/400v, and rated current up to 63A. When a person is electrocuted or the leakage current of the power grid exceeds the specified value, the residual current operated circuit breaker can automatically cut off the power supply in a short time to ensure personal safety and prevent accidents caused by leakage current of the equipment. The residual current operated circuit breaker also has overload and short circuit protection functions, which can be used to protect the line from overload and short circuit, and can also be used for infrequent line conversion under normal circumstances. It is suitable for various places such as industry, commerce, high-rise and residential buildings.
Product Overview
The CQB3LE-63 series residual current operated circuit breaker is thoughtfully designed by CHAC Electric to meet the customization needs of international clients in low – voltage electrical systems. As an experienced contract manufacturer with a strong export focus, we provide exceptional ODM/OEM services. These leakage MCBs are ideal for AC 50Hz distribution systems with a rated voltage of 230/400V and a rated current up to 63A. When a person gets an electric shock or the grid leakage current exceeds the specified value, the residual current operated circuit breaker can automatically cut off the power supply within a short time, ensuring personal safety and preventing accidents caused by leakage current. Equipped with overload and short – circuit protection functions, they can be used to protect lines from overload and short circuits. In normal conditions, they can also serve as devices for infrequent conversion of lines. Our CQB3LE-63 series is suitable for various venues such as industrial, commercial, high – rise, and residential buildings. Our CQB3LE-63 series stands out due to advanced technology and strict quality control. Using cutting – edge equipment and following strict quality standards, we guarantee reliable performance. 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.
Product Features
■ Earth Leakage Protection
30/50/100/300mA sensitivity options provide personal protection against electric shock
■ Dual Protection Function
Combines overload/short-circuit protection with earth leakageprotection
■ Fast Response
≤0.1s tripping time for quick fault circuit interruption
■ Flexible Configurations
1P+N, 2P,3P,3P+Nand 4P versions available
Ordering Specification
1.Product Model: CQB3LE-63
2.Number of Poles: 1P+N, 2P,3P, 3P+N, 4P
3.Rated Current & Tripping Curve: [e.g.: C/32A]
- Tripping Curve:B,C,D
- Rated Current (In): 6A, 10A, 16A, 20A, 25A, 32A,40A,50A,63A
4.Rated Residual Operating Current (IAn): 30mA,50mA, 100mA,300mA
5.Quantity: [e.g.: 100 pcs]
Ordering Example:
CQB3LE-63 2P C/32A 30mA 100 pcs
Type designation
Tripping curves
Dimensions(unit:mm)
| Poles | L |
| 1P+N | 53.4 |
| 2P | 71.2 |
| 3P | 102.4 |
| 3P+N | 115.8 |
| 4P | 133.6 |
Technical data
| Parameter | |
| Rated voltage | 230V~ (2P, 1P+N) / 400V~ (3P, 4P, 3P+N) |
| Rated current | 6, 10, 16, 20, 25, 32, 40, 50, 63 A |
| Number of Poles | 2P, 3P, 4P, 1P+N, 3P+N |
| Rated breaking capacity (Icn = Ics) | 6000 A |
| Rated residual operating current (IΔn) | 30, 50, 100, 300 mA |
| Rated residual non-operating current | 0.5 IΔn |
| Rated residual making and breaking capacity | 2000 A |
| Tripping time | ≤ 0.1 s |
| Mechanical life | 4000 operations |
| Electrical life | 4000 operations |
| Tripping curves | B, C, D |
| Degree of protection | IP20 |
| Overvoltage category | Ⅲ |
| Standards | IEC 61009-1, GB/T 16917.1 |
| Certification | CCC |
Table1 Tripping characteristics (Reference temp)
| Item | Ratedcurrent(A) | Initial Status | Test current In(A) | Time limit for tripping or non-tripping | Expected result | Remarks |
| Delay | ≤63 | Cold | 1.13ln | ≤1h | Non-tripping | |
| Delay | ≤63 | Following previous test | 1.45In | <1h | Tripping | Current smoothly rises to specified value in 5s |
| Delay | ≤32 | Cold | 2.55In | 1<t<60s | Tripping | |
| Delay | ﹥32 | Cold | 2.55In | 1<t<120s | Tripping | |
| Instantaneous | Any value | Cold | 3、5、10In | ≤0.1s | Non-tripping | B、C、D |
| Instantaneous | Any value | Cold | 5、10、20In | <0.1s | Tripping | B、C、D |
Note: The term “cold” means that the test is carried out at a reference calibration temperature without load before the test.
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 |
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
CQB3 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.
