CQM5L Series Residual Current Circuit Breaker
The CQM5L series circuit breaker with residual current protection is designed by CHAC Electric for use in AC 50Hz/60Hz circuits with a rated working voltage up to AC 415V and a rated working current up to 630A.
Product Features
■ Compact design with highbreaking capacity.
■ High short-circuit making capacity and vibration resistance.
■ Modular structure for quick and easy installation.
■ Provides overload, short-circuit, and residual current (earth fault) protection.
■ Adjustable residual current protection with selectable delay levels (3 or 4 stages) and configurable leakage trip current.
■ Equipped with a leakage trip indicator.
■ Suitable for circuits with AC voltage up to 415V and frequency 50Hz/60Hz.
■ Complies with GB/T 14048.2 and IEC 60947-2 standards.
Operating & Installation Conditions
■ Ambient temperature: -5℃ to +40℃ (average ≤ +35℃ within 24 hours)
■ Altitude ≤2000 meters above sea level.
■ Relative humidity ≤50% at +40℃.
■ Must be mounted vertically with tilt tolerance within ±5°.
■ Pollution degree: 3.
■ Suitable for protection in in distribution and motor circuits.
Accessory List
Type designation
| Code Position | Code Symbol | Meaning & Explanation |
| ① | CQ | Enterprise Code: Zhejiang Chuangqi Electric Co., LTD. |
| ② | M | Product Category: Molded Case Circuit Breaker |
| ③ | 5 | Design Serial Number |
| ④ | L | Special Protection Function Residual Current Protection (Options: L=RC Protection) |
| ⑤ | 125 | Rated Frame Current (A): Options: 125, 250, 400, 630 |
| ⑥ | □ | Operation Mode: • (No Code) – Manual Direct Operation • Z – Rotary Handle Operation • P – Electric Operation |
| ⑦ | 4 | Number of Poles: • 3 – Three Poles • 4 – Four Poles |
| ⑧ | 300 | Trip Unit & Accessories Code: • 3 – Electronic Trip (Compound Trip) • 2 – Magnetic Trip Only (Single Magnetic Trip) • 00 – No Accessories (Refer to accessory table for specific codes) |
| ⑨ | □ | Application Type: • (No Code) – Distribution Protection • 2 – Motor Protection |
| ⑩ | B | N-Pole Type (For 4P products only, 3P has no code): • Type A: N-pole is always connected, without overcurrent release. • Type B: N-pole breaks with other poles, without overcurrent release. • Type C: N-pole breaks with other poles, with overcurrent release. • Type D: N-pole is always connected, with overcurrent release. |
| ⑪ | 125A | Rated Current: See technical parameter table for available values. |
| ⑫ | Y | Time-Delay Function • Y: With Delay • F: Without Delay |
| ⑬ | □ | Terminal & Connection Type: • (No Code) – Front Terminal Connection • B – Rear Terminal Connection • C – Plug-in Type |
Technical Specifications
| Model number | CQM5L-125 | CQM5L-250 | ||
| Rated current of frame level Inm(A) | 125 | 250 | ||
| Rated current In(A),at 40℃ | 10, 16, 20, 32, 40, 50, 63, 80, 100, 125 | 100, 125, 140, 160, 180, 200, 225, 250 | ||
| Rated operating voltage Ue(V) | AC380/400/415V | AC380/400/415V | ||
| Rated insulation voltage Ui (V) | 1000 | 1000 | ||
| Rated impulse withstand voltage Uimp(kV) | 8 | 8 | ||
| Mechanical life | 20000 | 20000 | ||
| Electrical life(AC415V) | 8000 | 8000 | ||
| Trip mechanisms and protection types | Thermal-magnetic trip | Thermal-magnetic trip | ||
| Selectivity category | A | A | ||
| Number of poles | 3P, 4P | 3P, 4P | ||
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) (kA) | 70 | 70 | ||
| Rated Service Short-Circuit Breaking Capacity (Ics) (kA) | 50 | 50 | ||
| Rated Residual Operating Current (IΔn) | Time-delayed + Non-delayed | 100/300/500 | 100/300/500 | |
| Non-delayed only | 30/100/300/500 | / | ||
| Rated Residual Current Type | AC type | AC type | ||
| Rated Residual Making & Breaking Capacity (IΔm) | 1/4Icu | 1/4Icu | ||
| Phase spacing (mm) | 30 | 35 | ||
| Arc distance (mm) | ≤50 | ≤50 | ||
| Operating ambient temp | -35 ℃ to +70℃ | -35℃ to +70℃ | ||
| Accessory | Auxiliary contacts | ● | ● | |
| Alarm contacts | ● | ● | ||
| Shunt Release | ● | ● | ||
| Under-Voltage Release | ● | ● | ||
| Motor Operating Mechanism | ● | ● | ||
| Manual Handle Assembly | ● | ● | ||
| Fixed Type Rear-Mounting Kit | ● | ● | ||
| Plug-in Type, Front-of-Panel | ● | ● | ||
| Plug-in Type, Rear-of-Panel | ● | ● | ||
| Mechanical Interlock | ● | ● | ||
| Instantaneous protection | Power distribution protection | In≤40A: 400A; In≥50A: 10In | 10In | |
| Electric motor protection | In≤40A: 400A; In≥50A: 12In | 12In | ||
| Overall dimensions (mm) (L-W-H) |
 |
3 P | 155-90-90 | 165-105-103 |
| 4 P | 155-120-90 | 165-140-103 | ||
Note:● for optional accessories;”-”for no optional accessories.
| Model number | CQM5L-400 | CQM5L-630 | ||
| Rated current of frame level Inm(A) | 400 | 630 | ||
| Rated current In(A),at 40℃ | 225, 250, 315, 350, 400 | 400, 500, 630 | ||
| Rated operating voltage Ue(V) | AC380/400/415V | AC380/400/415V | ||
| Rated insulation voltage Ui (V) | 1000 | 1000 | ||
| Rated impulse withstand voltage Uimp(kV) | 8 | 8 | ||
| Mechanical life | 10000 | 10000 | ||
| Electrical life(AC415V) | 7000 | 7000 | ||
| Trip mechanisms and protection types | Thermal-magnetic trip | Thermal-magnetic trip | ||
| Selectivity category | A | A | ||
| Number of poles | 3P, 4P | 3P, 4P | ||
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) (kA) | 70 | 70 | ||
| Rated Service Short-Circuit Breaking Capacity (Ics) (kA) | 70 | 70 | ||
| Rated Residual Operating Current (IΔn) | Time-delayed + Non-delayed | 100/300/500/1000 | 100/300/500/1000 | |
| Non-delayed only | / | / | ||
| Rated Residual Current Type | AC type | AC type | ||
| Rated Residual Making & Breaking Capacity (IΔm) | 1/4Icu | 1/4Icu | ||
| Phase spacing (mm) | 48 | 70 | ||
| Arc distance (mm) | ≤100 | ≤100 | ||
| Operating ambient temp | -35 ℃ to +70℃ | -35℃ to +70℃ | ||
| Accessory | Auxiliary contacts | ● | ● | |
| Alarm contacts | ● | ● | ||
| Shunt Release | ● | ● | ||
| Under-Voltage Release | ● | ● | ||
| Motor Operating Mechanism | ● | ● | ||
| Manual Handle Assembly | ● | ● | ||
| Fixed Type Rear-Mounting Kit | ● | ● | ||
| Plug-in Type, Front-of-Panel | ● | ● | ||
| Plug-in Type, Rear-of-Panel | ● | ● | ||
| Mechanical Interlock | ● | ● | ||
| Instantaneous protection | Power distribution protection | 10In | 10In | |
| Electric motor protection | 12In | 12In | ||
| Overall dimensions (mm) (L-W-H) |
|
3 P | 257-150-104.5 | 280-210-112 |
| 4 P | 257-198-104.5 | 280-280-112 | ||
Note:● for optional accessories;”-”for no optional accessories.
Dimensions (mm)
CQM5L-125
Front Terminal Connection Dimensions (X-X, Y-Y denote center points for 3P breakers)
CQM5L-250
Front Terminal Connection Dimensions (X-X, Y-Y denote center points for 3P breakers)
CQM5L-400
Front Terminal Connection Dimensions (X-X, Y-Y denote center points for 3P breakers)
CQM5L-630
Front Terminal Connection Dimensions
Note: Undefined tolerances comply with grade GB/T 1804-80.
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?
Flexible customization services are available for enclosure dimensions, component configuration,
branding and project requirements.
Enclosure
Design
Customized enclosure sizes, structures and installation details.
Internal
Configuration
Flexible internal layout and component arrangement options.
Branding &
Logo
Private label logos, nameplates and brand identification.
Packaging
Design
Custom cartons, labels, manuals and packaging solutions.
Electrical
Configuration
Tailored electrical setup based on application requirements.
Certification
Support
Support for target-market standards and compliance requirements.
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CQM5 Series Moulded Case Circuit Breaker
Complete product overview for low-voltage electrical components and product selection reference.
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Frequently Asked Questions
¿Admite la personalización de productos según nuestros requisitos de diseño?
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.
P2: ¿Cuál es tu capacidad de producción y Cantidad Mínima de Pedido (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.
P3: ¿Qué garantías hay sobre la calidad del producto y las certificaciones?
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.
