CQB3Ln-63 Residual Current Circuit Breaker with Overcurrernt Protection – Electronic Type
The CQB3Ln-63 RCBO provides overload, short-circuit and residual-current protection within its published 6A–63A range. Selection should be based on the circuit voltage, conductor, load behaviour, prospective fault current and applicable installation rules—not the ampere rating alone.
Product Overview
CQB3Ln-63 is an RCBO for 230V AC distribution circuits. It combines thermal-magnetic overcurrent protection with residual-current protection in one device. The published range covers 6A–63A, 1P+N, B / C curves and 30mA sensitivity options. The saved model data describes the residual-current or construction type as Type AC / Type A; electronic construction.
The CQB3Ln-63 is a 30mA Type A RCBO option offered in a compact 1P+N RCBO format, with Type AC also listed in the model data.
The saved model record lists IEC/EN 61009-1 as the applicable standard reference. No certification claim is added beyond the saved model record.
Key Features
Typical Applications
Typical use is in final or sub-distribution circuits where both overcurrent and residual-current protection are required. The project must still confirm the expected residual-current waveform, sensitivity, neutral arrangement, pole configuration, fault level, conductor size, enclosure conditions and local wiring rules.
Applications and Selection Guide
Use the verified model values below to create a shortlist, then validate the complete circuit. Product ratings do not replace conductor calculations, a fault-current study, coordination review or local installation requirements.
| Selection point | CQB3Ln-63 reference | What the project must confirm |
|---|---|---|
| Rated current | 6A–63A | Design current, conductor ampacity, installation method, ambient temperature and grouping |
| Voltage and frequency | 230V AC; 50/60Hz | Supply system and equipment rating |
| Pole configuration | 1P+N | Conductors to be switched/protected, including neutral treatment |
| Trip curve | B / C | Load inrush and required disconnection performance |
| Residual-current selection | 30mA; Type AC / Type A; electronic construction | Expected waveform, sensitivity, purpose and local rules |
| Breaking capacity | 6kA | Prospective short-circuit current and protection coordination |
Protection Scope
An RCBO combines overcurrent and residual-current protection; it is not simply an MCB with a different label.
MCB vs RCBO
Compare Protection Functions →
Residual-Current Selection
Published options: 30mA. Confirm sensitivity and waveform type for the actual circuit and market.
Sensitivity & Type
Review Selection Support →
Breaking Capacity and Curve
6kA; B / C curves. Both fault level and load inrush must be checked.
Fault Level & Inrush
Compare Breaking Capacity →
Pole and Wiring Arrangement
Published pole options: 1P+N. Use the exact model diagram; do not assume neutral routing.
Poles & Neutral
Confirm Wiring Data →
Ordering Guide
- Specify the exact model: CQB3Ln-63.
- State the required current rating within 6A–63A.
- Confirm pole arrangement: 1P+N.
- Confirm trip curve: B / C.
- Confirm residual-current sensitivity and type from the published 30mA options.
- Provide system voltage, expected fault level, destination market, quantity and document requirements.
Installation and Coordination Checks
- Use the exact model drawing and instructions; do not infer supply direction, neutral routing or terminal positions from another product.
- Verify conductor material and cross-section against the circuit calculation and published terminal data.
- Confirm fault level, upstream/downstream coordination, enclosure temperature, grouping, altitude and clearances.
- Installation, isolation, testing and maintenance must be carried out by qualified personnel under applicable rules.
Type designation
Tripping curves
Dimensions(mm)
Technical Specifications
| Parameter | |
| Rated Current (In) | 6A, 10A, 16A, 20A, 25A, 40A, 40A, 63A |
| Rated Voltage | 230V~ |
| Rated Frequency | 50/60Hz |
| Rated Breaking Capacity | 6kA |
| Tripping Type | Thermal-magnetic (for overload and short-circuit) |
| Residual Current Operating Characteristic | AC,A |
| Rated Residual Operating Current((IΔn) | 30mA |
| Rated Residual Non-Operating Current(IΔno) | 15mA |
| Instantaneous Tripping Type | B.C |
| Number of Poles | 1P+N |
| Rated Impulse Withstand Voltage (Uimp) | 4kV (1.2/50 μs wave) |
| Power Frequency Withstand Voltage Test | 2kV for 1 minute |
| Thermal Tripping Characteristic | (1.13-1.45) × In |
| Magnetic Tripping Characteristic | B:(3-5) × In, C: (5-10) × In |
| Electrical Endurance | 6,000 cycles |
| Mechanical Endurance | 10,000 cycles |
| Contact Position Indicator | Yes |
| Degree of Protection | IP20 |
| Ambient Temperature | -25℃ to +40℃, max. humidity 95% |
| Maximum Cable Terminal Size | 16mm2 |
| Maximum Tightening Torque | 2.5 N.m |
| Mounting Method | Mounts on 35mm DIN rail |
| Standard | IEC/EN 61009-1 |
Conductor requirements and cross section
| Copper cross-section(mm2) | Rated current In(A) |
| 1 | ln≤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?
For CQB3Ln-63 projects, CHAC can review private-label marking, packaging, approved appearance options, published 6A–63A electrical configurations and technical-document requirements. Requests outside the published range are subject to engineering evaluation, testing, minimum order quantity and project feasibility.
Logo & Branding
Private-label marking and nameplate options are subject to artwork review and sample approval.
Packaging
Customization
Cartons, labels and manuals can be prepared for the approved order specification and destination market.
Electrical
Customization
Select from the published 6A–63A, 1P+N and B / C options; non-standard requests require technical evaluation.
Product
Appearance
Appearance options can be reviewed subject to tooling, minimum order quantity, marking requirements and technical feasibility.
Certification
Support
Datasheets, drawings and verified certificate information are supplied for the applicable approved configuration.
Engineering
Development
Project support may include drawing review, sample evaluation, testing and production planning, subject to technical approval.
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.
CQB3Ln-63 Product FAQ
What is the CQB3Ln-63 RCBO?
The CQB3Ln-63 combines overload and short-circuit protection with residual-current protection. Its verified range is 6A–63A with 1P+N configurations; the exact ordered option must match the circuit and local rules.
How does the CQB3Ln-63 RCBO work?
A thermal-magnetic mechanism responds to overload and short-circuit conditions, while the residual-current function monitors imbalance between conductors and trips when the applicable threshold is reached. It does not remove the need for correct earthing, circuit design or testing.
How is the CQB3Ln-63 RCBO different from an MCB or RCCB?
An MCB provides overcurrent protection but not residual-current protection. An RCCB provides residual-current protection but normally needs separate overcurrent protection. The CQB3Ln-63 combines both functions in one product, within its published ratings.
Can the CQB3Ln-63 RCBO be used as a circuit breaker?
It can provide the overcurrent and residual-current functions stated for the model, but only when 230V AC, 6A–63A, 6kA and the residual-current requirements all suit the circuit. It should not be treated as a universal replacement for every breaker.
What are the selection limitations of the CQB3Ln-63 RCBO?
The principal checks are residual-current sensitivity (30mA), residual-current or construction type (Type AC / Type A; electronic construction), trip curve (B / C), pole arrangement (1P+N) and short-circuit data (6kA). Board space, neutral handling, coordination and destination-market rules also have to be verified.
How should the CQB3Ln-63 RCBO be wired and tested?
Use only the diagram and terminal identification supplied for the exact ordered model. Confirm supply direction, protected neutral arrangement, conductor size, torque and isolation procedure, then perform the prescribed test-button and functional checks. Qualified personnel should complete the work under local rules.
Confirm the Right CQB3Ln-63 Configuration
Send the current rating, poles, trip curve, system voltage, expected fault level, destination market and quantity, plus residual-current sensitivity and type. CHAC will review the request against the published model range.
