CQM5 Series Molded Case Circuit Breakers
CQM5 series molded case circuit breaker(herein after referred to as circuit breaker) is suitable for the circuit of AC 50Hz/60Hz, rated voltage to AC690Vand below, rated current16A to 800A,generally used for distribution protection, it can also be used as motor protection. Under normal conditions, the circuit breaker can be used for infrequent circuit conversion and infrequent motor startup.
Product Features
■ Compact design with high breaking capacity (classified into types C, L,H based on performance).
■ Short arc-extinguishing distance and strong anti-vibration performance.
■ Modular structure for easy installation and maintenance.
■ Suitable for both distribution network protection and motor circuit protection.
■ 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 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 | 125 | Rated Frame Current (A): Options: 63, 100, 125, 250, 400, 630, 800 |
| ⑤ | M | Breaking Capacity Class: • C – Basic Type • L – Standard Type • M – Higher Breaking Type • H – High Breaking Type |
| 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 | □ | Terminal & Connection Type: • (No Code) – Front Terminal Connection • B – Rear Terminal Connection • C – Plug-in Type |
Technical Specifications
| Model number | CQM5-63 | CQM5-100 | |||||
| Rated current of frame level Inm(A) | 63 | 100 | |||||
| Rated current In(A),at 40℃ | 10, 16, 20, 32, 40, 50, 63 | 10, 16, 20, 32, 40, 50, 63, 80, 100 | |||||
| Rated operating voltage Ue(V) | AC380/400/415V | AC380/400/415V | |||||
| AC660/690V | AC660/690V | ||||||
| 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 | |||
| Breaking capacity designation | L | M | – | C | C | ||
| Rated ultimate short-circuit breaking capacity (Icu) (kA) | AC380/400/415V | 36 | 55 | 55 | 40 | 40 | |
| AC660/690V | / | 12 | 12 | 12 | 12 | ||
| Rated service short-circuit breaking capacity (Ics) (kA) | AC380/400/415V | 36 | 40 | 40 | 30 | 30 | |
| AC660/690V | / | 10 | 10 | 10 | 10 | ||
| Phase spacing (mm) | 25 | 25 | |||||
| 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≤32A:400A; In≥40A:10In | In≤32A:400A; In≥40A:10In | ||||
| Electric motor protection | In≤32A:400A; In≥40A:12In | In≤32A:400A; In≥40A:12In | |||||
| Overall dimensions (mm) (L-W-H) |
 |
3 P | 130-75-65 | 130-75-65 | |||
| 4 P | 130-100-65 | 130-100-65 | |||||
Note:● for optional accessories;”-”for no optional accessories.
| Model number | CQM5-125 | CQM5-250 | ||||||||
| 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 | ||||||||
| AC660/690V | AC660/690V | |||||||||
| 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 | 3P, 4P | 4P | 3P | 3P, 4P | 4P | ||||
| Breaking capacity designation | C | L | M | H | C | L | M | H | ||
| Rated ultimate short-circuit breaking capacity (Icu) (kA) | AC380/400/415V | 36 | 50 | 70 | 100 | 36 | 50 | 70 | 100 | |
| AC660/690V | / | / | 20 | / | / | / | 20 | / | ||
| Rated service short-circuit breaking capacity (Ics) (kA) | AC380/400/415V | 25 | 36 | 50 | 70 | 25 | 36 | 50 | 70 | |
| AC660/690V | / | / | 10 | / | / | / | 10 | / | ||
| Phase spacing (mm) | 30 | 35 | ||||||||
| Arc distance (mm) | ≤50 | ≤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 | 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 | 155-90-75.5 | 165-105-75 | ||||||
| 4 P | 155-120-87 | 165-140-100 | ||||||||
Note:● for optional accessories;”-”for no optional accessories.
| Model number | CQM5-400 | CQM5-630 | |||||||||
| 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 | |||||||||
| AC660/690V | AC660/690V | ||||||||||
| Rated insulation voltage Ui (V) | 1000 | 1000 | |||||||||
| Rated impulse withstand voltage Uimp(kV) | 8 | 8 | |||||||||
| Mechanical life | 10000 | 1000 | |||||||||
| 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 | 3P | 4P | 3P | |||||
| Breaking capacity designation | C | L | M | / | H | L | M | / | H | ||
| Rated ultimate short-circuit breaking capacity (Icu) (kA) | AC380/400/415V | 36 | 50 | 70 | 70 | 100 | 50 | 70 | 70 | 100 | |
| AC660/690V | / | / | 20 | 20 | / | / | 20 | 20 | / | ||
| Rated service short-circuit breaking capacity (Ics) (kA) | AC380/400/415V | 36 | 50 | 70 | 70 | 75 | 50 | 70 | 70 | 75 | |
| AC660/690V | / | / | 15 | 15 | / | / | 15 | 15 | / | ||
| 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 | 275-150-104.5 | 275-150-104.5 | |||||||
| 4 P | 275-198-104.5 | 275-198-104.5 | |||||||||
Note:● for optional accessories;”-”for no optional accessories.
| Model number | CQM5-800 | |||||
| Rated current of frame level Inm(A) | 800 | |||||
| Rated current In(A),at 40℃ | 400, 500, 630, 700, 800 | |||||
| Rated operating voltage Ue(V) | AC380/400/415V | |||||
| AC660/690V | ||||||
| Rated insulation voltage Ui (V) | 1000 | |||||
| Rated impulse withstand voltage Uimp(kV) | 8 | |||||
| Mechanical life | 10000 | |||||
| Electrical life(AC415V) | 7000 | |||||
| Trip mechanisms and protection types | Thermal-magnetic trip | |||||
| Selectivity category | A | |||||
| Number of poles | 3P | 4P | 3P | |||
| Breaking capacity designation | L | M | / | H | ||
| Rated ultimate short-circuit breaking capacity (Icu) (kA) | AC380/400/415V | 50 | 70 | 70 | 100 | |
| AC660/690V | / | 20 | 20 | / | ||
| Rated service short-circuit breaking capacity (Ics) (kA) | AC380/400/415V | 50 | 70 | 70 | 75 | |
| AC660/690V | / | 15 | 15 | / | ||
| Phase spacing (mm) | 70 | |||||
| Arc distance (mm) | ≤100 | |||||
| Operating ambient temp | -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 | ||||
| Electric motor protection | 12In | |||||
| Overall dimensions (mm) (L-W-H) |
|
3 P | 280-210-112 | |||
| 4 P | 280-280-112 | |||||
Note:● for optional accessories;”-”for no optional accessories.
Dimensions (mm)
CQM5-63/100
Front Terminal Connection Dimensions (X-X, Y-Y denote center points for 3P breakers)
CQM5-125 (C, L, M, H Types)
Front Terminal Connection Dimensions
(X-X, Y-Y denote center points for 3P breakers)
| Model number | H(mm) | H1 (mm) |
| CQM5-125C、125L | 75.5 | 101.5 |
| CQM5-125M、125H | 87 | 113 |
CQM5-250 (C, L, M, H Types)
Front Terminal Connection Dimensions
(X-X, Y-Y denote center points for 3P breakers)
| Model number | H (mm) | H1 (mm) |
| CQM5-250C、250L | 75 | 103.7 |
| CQM5-250M、250H | 100 | 128.7 |
CQM5-400 (C, L, M, H Types)
CQM5-630 (C, L, M, H Types)
Front Terminal Connection Dimensions (X-X, Y-Y denote center points for 3P breakers)
CQM5-800 ( L, M, H Types)
Front Terminal Connection Dimensions (X-X, Y-Y denote center points for 3breakers)
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.
Download
CQM5 Series Moulded Case 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.
