CQM5E Series Electronic Molded Case Circuit Breaker
The CQM5E series electronic molded case circuit breaker is designed by CHAC Electric for use in AC 50Hz/60Hz systems with a rated voltage of up to AC 690V and a rated current of up to 800A.Additionally, it provides ground fault protection, further enhancing the safety and reliability of electrical systems.
Product Features
■ Compact and modular design for quick installation and maintenance.
■ High breaking capacity (M-type: higher breaking, H-type: high brreaking)
■ Provides overload, short-circuit, and ground fault protection, with optional undervoltage protection.
■ Supports communication module integration for remote monitoring and control (remote trip, adjustment, testing, and signaling).
■ Suitable for both distribution network and motor protectionapplications.
■ Complies with IEC 60947-1, IEC 60947-2, and GB/T 14048 standards
Operating & Environmental Conditions
■ Designed for vertical mounting (±5° tilt allowed unless specified)。
■ Suitable for infrequent circuit switching and motor starting operations
■ Pollution degree: 3
■ Communication module can be added for smart functionality.
Accessory List
Dimensions (mm)
CQM5E-125 (M, H Types)
Front Terminal Connection Dimensions
(X-X, Y-Y denote center points for 3P breakers)
CQM5E-250 (M, H Types)
Front Terminal Connection Dimensions
(X-X,Y-Y denote center points for 3P breakers)
CQM5E-400 (M, H Types)
Front Terminal Connection Dimensions
(X-X, Y-Y denote center points for 3P breakers)
CQM5E-630 (M, H Types)、CQM5E-800 (M, H Types)
Front Terminal Connection Dimensions
(X-X, Y-Y denote center points for 3P breakers)
Type designation
| Code Position | Code Symbol | Meaning & Explanation |
| ① | CQ | Enterprise Code: Zhejiang Chuangqi Electric Co., LTD. |
| ② | M | Molded Case Circuit Breaker |
| ③ | 5 | Design Serial Number |
| ④ | E | Special Protection Function Residual Current Protection (Options: L=RC Protection) |
| ⑤ | 125 | Rated Frame Current (A): Options: 125, 250, 400, 630, 800 |
| ⑥ | M | Short-Circuit Breaking Capacity: • M: Higher Fault Capacity • H: High Fault Capacity |
| ⑦ | □ | Operation Mechanism [blank]: Manual | Z: Rotary Handle | P: Motorized |
| ⑧ | □ | Intelligence Function • [blank]: Basic Protection • G: Ground Fault Protection • T: Communication Capable • GT: Ground+Communication |
| ⑨ | 4 | Number of Poles:• 3 – Three Poles • 4 – Four Poles |
| ⑩ | 300 | Trip Unit & Accessories Code:• 3 – Electronic Trip (Compound Trip) • 00 – No Accessories (Refer to accessory table for specific codes) |
| ⑪ | □ | □: Application Profile [blank]: Distribution | 2: Motor Protection |
| ⑫ | B | N-Pole Type (For 4P products only): • 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. |
| ⑬ | □ | Special Function I: Overload Alarm (non-trip) |
| ⑭ | □ | Rated Current (A) Options: 32 | 63 | 125 | 250 | 400 | 630 | 800 |
| ⑮ | □ | Terminal & Connection Type: • (No Code) – Front Terminal Connection • B – Rear Terminal Connection • C – Plug-in Type |
Technical Specifications
| Model number | CQM5E-125 | CQM5E-250 | ||||||
| Rated current In(A), 40℃ | 32 | 63 | 125 | 250 | ||||
| Setting Current Ir (A), 40℃ | 16/20/25/32 | 32/40/50/63 | 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 | Electronic | Electronic | ||||||
| Selectivity category | A | A | ||||||
| Number of poles | 3P | 4P | 3P | 4P | ||||
| Breaking capacity designation | M | H | / | M | H | / | ||
| Rated ultimate short-circuit breaking capacity (Icu) (kA) | AC380/400/415V | 70 | 85 | 70 | 70 | 85 | 70 | |
| AC660/690V | 20 | / | 20 | 20 | / | 20 | ||
| Rated service short-circuit breaking capacity (Ics) (kA) | AC380/400/415V | 50 | 65 | 50 | 50 | 65 | 50 | |
| AC660/690V | 10 | / | 10 | 10 | / | 10 | ||
| Phase spacing (mm) | 30 | 35 | ||||||
| Arc distance (mm) | ≤50 | ≤100 | ||||||
| Operating ambient temp | -35 ℃ to +70℃ | -35 ℃ to +70℃ | ||||||
| Rated short-time withstand current (Icw) | 1kA/1s | 2.5kA/1s | ||||||
| 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 | ● | ● | ● | ● | ● | ● | ||
| Short-circuit protection types | Short-time delay protection (S) | Isd= (2-12) Ir | Isd= (2-12) Ir | |||||
| Instantaneous protection (I) | Ii= (4-14) Ir | Ii= (4-14) Ir | ||||||
| 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 | CQM5E-400 | CQM5E-630 | ||||||
| Rated current In(A), 40℃ | 400 | 630 | ||||||
| Setting Current Ir (A), 40℃ | 200, 225, 250, 280, 315, 350, 400 | 400, 420, 440, 460, 480, 500, 530, 560, 600, 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 | 10000 | ||||||
| Electrical life(AC415V) | 7000 | 7000 | ||||||
| Trip mechanisms and protection types | Electronic | Electronic | ||||||
| Selectivity category | B | B | ||||||
| Number of poles | 3P | 4P | 3P | 4P | ||||
| Breaking capacity designation | M | H | / | M | H | / | ||
| Rated ultimate short-circuit breaking capacity (Icu) (kA) | AC380/400/415V | 70 | 100 | 70 | 70 | 100 | 70 | |
| AC660/690V | 20 | / | 20 | 20 | / | 20 | ||
| Rated service short-circuit breaking capacity (Ics) (kA) | AC380/400/415V | 50 | 75 | 50 | 50 | 75 | 50 | |
| AC660/690V | 10 | / | 10 | 10 | / | 10 | ||
| Phase spacing (mm) | 48 | 70 | ||||||
| Arc distance (mm) | ≤100 | ≤100 | ||||||
| Operating ambient temp | -35℃ to +70℃ | -35℃ to +70℃ | ||||||
| Rated short-time withstand current (Icw) | 5kA/1s | 10kA/1s | ||||||
| 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 | ● | ● | ● | ● | ● | ● | ||
| Short-circuit protection types | Short-time delay protection (S) | Isd= (2-12) Ir | Isd= (2-12) Ir | |||||
| Instantaneous protection (I) | Ii= (4-14) Ir | Ii= (4-14) Ir | ||||||
| Overall dimensions (mm) (L-W-H) |
|
3 P | 257-150-140.5 | 280-210-112 | ||||
| 4 P | 257-198-140.5 | 280-280-112 | ||||||
Note: ● for optional accessories;”-” for no optional accessories.
| Model number | CQM5E-800 | ||||
| Rated current In(A), 40℃ | 800 | ||||
| Setting Current Ir (A), 40℃ | 630,640,660,680,700,720,740,760,780,800 | ||||
| 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 | Electronic | ||||
| Selectivity category | B | ||||
| Number of poles | 3P | 4P | |||
| Breaking capacity designation | M | H | / | ||
| Rated ultimate short-circuit breaking capacity (Icu) (kA) | AC380/400/415V | 70 | 100 | 70 | |
| AC660/690V | 20 | / | 20 | ||
| Rated service short-circuit breaking capacity (Ics) (kA) | AC380/400/415V | 50 | 75 | 50 | |
| AC660/690V | 10 | / | 10 | ||
| Phase spacing (mm) | 70 | ||||
| Arc distance (mm) | ≤100 | ||||
| Operating ambient temp | -35℃ to +70℃ | ||||
| Rated short-time withstand current (Icw) | 10kA/1s | ||||
| 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 | ● | ● | ● | ||
| Short-circuit protection types | Short-time delay protection (S) | Isd= (2-12) Ir | |||
| Instantaneous protection (I) | Ii= (4-14) Ir | ||||
| Overall dimensions (mm) (L-W-H) |
|
3 P | 280-210-112 | ||
| 4 P | 280-280-112 | ||||
Note: ● for optional accessories;”-” for no optional accessories.
Internal Accessories
1.1 AX Auxiliary Contact
Function
Remote status indicator for breaker ON/OFF or trip-free operation, integrated into the auxiliary circuit.
Indicating Circuit Breaker ON/OFF Status
| When the circuit breaker is in the “OFF” and “TRIPPED”position | Dual auxiliary contact |  |
| Single auxiliary contact. |  |
|
| When the circuit breaker is in the “ON” position |
Dual auxiliary contact |  |
| Single auxiliary contact |  |
Electrical Characteristics
| Classification | Frame Rating | Conventional Thermal Current (A) | Rated Operational Current (A) | |
| Auxiliary Contact | 63,100,125,250 | 3 | AC400V | DC220V |
| 400,630,800 | 3 | 0.4 | 0.15 | |
1.2 AL Alarm Contact
Wiring Diagram
Function
Primarily used to provide a signal when a fault such as overloadd,short circuit,or undervoltage occurs on the circuit breaker’s loaad side,orwhenitentersafree-trip state.
Reasons for the alarm contact to issue a fault indication signal:
Overload or Short Circuit Trip
Undervoltage Trip
Residual Current Operation Trip
Manual Free-Trip
Indicating Circuit Breaker ON/OFF Status
| When the circuit breaker is in the “OFF” and “ON” position |  |
| When the circuit breaker is in the “TRIPPED” position. |  |
Electrical Characteristics
| Classification | Frame Rating | Conventional Thermal Current (A) | Rated Operational Current (A) | |
| Alarm Contact | 63,100,125,250 | 3 | AC400V | DC220V |
| 400,630,800 | 3 | 0.4 | 0.15 | |
1.3 SHT Shunt Release
Wiring Diagram
Function
The shunt release is activated by an electrical signal, enabling remote and automatic control of the circuit breaker. The shunt release shall reliably cause the circuit breaker to operate when the supply voltage is any value between 70% and 110% of the rated control supply voltage.
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | ||||||
| DC24V | DC220V | AC230V | AC380V | DC24V | DC220V | AC230V | AC380V | ||
| 1 | CQM5-63/100 | 5.7 | 0.62 | 0.64 | 0.38 | 136.8 | 136.4 | 147.2 | 152 |
| 2 | CQM5-125 | 4 | 0.24 | 0.25 | 0.43 | 97.6 | 52.6 | 57.5 | 173.9 |
| 3 | CQM5-250 | 4 | 0.24 | 0.25 | 0.43 | 97.6 | 52.6 | 57.5 | 173.9 |
| 4 | CQM5-400/630 | 6.8 | 0.48 | 0.76 | 0.28 | 164.5 | 105 | 176.3 | 112 |
| 5 | CQM5-800 | 6.8 | 0.48 | 0.76 | 0.28 | 164.5 | 105 | 176.3 | 112 |
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | ||||||
| DC24V | DC220V | AC230V | AC380V | DC24V | DC220V | AC230V | AC380V | ||
| 1 | CQM5L-125 | 4 | 0.24 | 0.25 | 0.43 | 97.6 | 52.6 | 57.5 | 173.9 |
| 2 | CQM5L-250 | 4 | 0.24 | 0.25 | 0.43 | 97.6 | 52.6 | 57.5 | 173.9 |
| 3 | CQM5L-400 | 6.8 | 0.48 | 0.76 | 0.28 | 164.5 | 105 | 176.3 | 112 |
| 4 | CQM5L-630 | 6.8 | 0.48 | 0.76 | 0.28 | 164.5 | 105 | 176.3 | 112 |
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | ||||||
| DC24V | DC220V | AC230V | AC380V | DC24V | DC220V | AC230V | AC380V | ||
| 1 | CQM5E-125 | 4 | 0.24 | 0.25 | 0.43 | 97.6 | 52.6 | 57.5 | 173.9 |
| 2 | CQM5E-250 | 4 | 0.24 | 0.25 | 0.43 | 97.6 | 52.6 | 57.5 | 173.9 |
| 3 | CQM5E-400 | 6.8 | 0.48 | 0.76 | 0.28 | 164.5 | 105 | 176.3 | 112 |
| 4 | CQM5E-630 | 6.8 | 0.48 | 0.76 | 0.28 | 164.5 | 105 | 176.3 | 112 |
| 5 | CQM5E-800 | 6.8 | 0.48 | 0.76 | 0.28 | 164.5 | 105 | 176.3 | 112 |
1.4UVR Under-Voltage Release
Wiring Diagram
Function
Protects equipment by tripping breakers during voltage dips.
Operational Thresholds
Reliable closing: ≥85% rated voltage
Mandatory tripping: 70%-35% rated voltage
Closing prevention:<35% rated voltage
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | ||||
| Pick-up Power (W) | Hold-in Power (W) | ||||||
| DC24V | DC220V | AC230V | AC380V | AC230V | AC380V | ||
| 1 | CQM5E-125 | 0.2 | 0.3 | / | / | 0.5 | 0.5 |
| 2 | CQM5E-250 | 0.006 | 0.01 | / | / | 0.3 | 0.3 |
| 3 | CQM5E-400 | 0.006 | 0.01 | / | / | 0.8 | 0.9 |
| 4 | CQM5E-630 | 0.8 | 0.5 | 190 | 223 | 0.8 | 0.9 |
| 5 | CQM5E-800 | 0.8 | 0.5 | 190 | 223 | 0.8 | 0.9 |
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | ||||
| Pick-up Power (W) | Hold-in Power (W) | ||||||
| DC24V | DC220V | AC230V | AC380V | AC230V | AC380V | ||
| 1 | CQM5L-125 | 0.006 | 0.01 | / | / | 0.3 | 0.3 |
| 2 | CQM5L-250 | 0.006 | 0.01 | / | / | 0.3 | 0.3 |
| 3 | CQM5L-400 | 0.8 | 0.5 | 190 | 223 | 0.8 | 0.9 |
| 4 | CQM5L-630 | 0.8 | 0.5 | 190 | 223 | 0.8 | 0.9 |
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | ||||
| Pick-up Power (W) | Hold-in Power (W) | ||||||
| DC24V | DC220V | AC230V | AC380V | AC230V | AC380V | ||
| 1 | CQM5E-125 | 0.006 | 0.01 | / | / | 0.3 | 0.3 |
| 2 | CQM5E-250 | 0.006 | 0.01 | / | / | 0.3 | 0.3 |
| 3 | CQM5E-400 | 0.8 | 0.5 | 190 | 223 | 0.8 | 0.9 |
| 4 | CQM5E-630 | 0.8 | 0.5 | 190 | 223 | 0.8 | 0.9 |
| 5 | CQM5E-800 | 0.8 | 0.5 | 190 | 223 | 0.8 | 0.9 |
External Accessories
2.1 Motor Operating Mechanism
Schematic Diagram
Function
Suitable for remotely closing, tripping (resetting) the circuit breaker,and for automated applications.
Position indication for O (OFF), I (ON), and TRIPPED.
Enables free trip operation of the circuit breaker.
Allows manual or automatic closing and opening of the circuit breaker.
Automatic closing or tripping can be achieved using momentary pulse signals or maintained signal control.
Reliable closing and tripping of the circuit breaker is ensured only when the control voltage is **≥85% and ≤ 110%** of the rated control
voltage (Un).
Dimensions (mm)
Schematic & Symbol Legend:
SB1, SB2: Operation buttons(To be provided by customer)
X: Terminal block
P1、P2:External power supply
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | Operating Mechanism Height |
|||
| DC24V | AC/DC110V | AC/DC220V | AC380V | ||||
| 1 | CQM5-63/100 | 80 | ≤180 | ≤180 | ≤350 | 20000 | 94 |
| 2 | CQM5-125 | 80 | ≤180 | ≤180 | ≤350 | 20000 | 97 |
| 3 | CQM5-250 | 80 | ≤180 | ≤180 | ≤350 | 20000 | 101 |
| 4 | CQM5-400/630 | 160 | ≤250 | ≤350 | ≤600 | 10000 | 149 |
| 5 | CQM5-800 | 160 | ≤250 | ≤350 | ≤600 | 10000 | 152 |
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | Operating Mechanism Height |
|||
| DC24V | AC/DC110V | AC/DC220V | AC380V | ||||
| 1 | CQM5L-125 | 80 | ≤180 | ≤180 | ≤350 | 20000 | 97 |
| 2 | CQM5L-250 | 80 | ≤180 | ≤180 | ≤350 | 20000 | 101 |
| 3 | CQM5L-400/630 | 160 | ≤250 | ≤350 | ≤600 | 10000 | 149 |
| 4 | CQM5L-800 | 160 | ≤250 | ≤350 | ≤600 | 10000 | 152 |
| Code | Model number | Instantaneous Tripping Current (A) | Power Consumption (W) | Operating Mechanism Height |
|||
| DC24V | AC/DC110V | AC/DC220V | AC380V | ||||
| 1 | CQM5E-125 | 80 | ≤180 | ≤180 | ≤350 | 20000 | 97 |
| 2 | CQM5E-250 | 80 | ≤180 | ≤180 | ≤350 | 20000 | 101 |
| 3 | CQM5E-400 | 160 | ≤250 | ≤350 | ≤600 | 10000 | 149 |
| 4 | CQM5E-630 | 160 | ≤250 | ≤350 | ≤600 | 10000 | 152 |
| 5 | CQM5E-800 | 160 | ≤250 | ≤350 | ≤600 | 10000 | 152 |
Note: General tolerance grade shall be in accordance withGB/T 1804-c.
2.2 Manual Handle Assembly
Function
Employs a unique design and transmission mechanism to perform circuit breaker Closing, Tripping (Reset), and Opening operations via handle rotation.
Features isolated position indication.
Clear position indications: O (OFF), I (ON), and TRIPPED
The breaker in the OFF position accepts 1-3 padlocks (Φ5-8mm), preverhting inadvertent closure and locking compartment access.
In the ON (closed) position, handle rotation mechanically prevents compartment door opening.(For emergency door access, use the handle’smanual override release).
Standard shaft length: 150mm.
Dimensions (mm)
| Code | Model number | A | B | C | D | H |
| 1 | CQM5-63/100 | 25 | 111 | 55 | 8 | 40 |
| 2 | CQM5-125 | 30 | 132 | 66 | 8 | 44 |
| 3 | CQM5-250 | 35 | 126 | 63 | 8 | 44 |
| 4 | CQM5-400/630 | 138 | 195 | 97.5 | 10 | 70 |
| 5 | CQM5-800 | 198 | 243 | 121.5 | 10 | 76 |
| Code | Model number | A | B | C | D | H |
| 1 | CQM5L-125 | 30 | 132 | 66 | 8 | 44 |
| 2 | CQM5L-250 | 35 | 126 | 63 | 8 | 44 |
| 3 | CQM5L-400 | 138 | 195 | 97.5 | 10 | 70 |
| 4 | CQM5L-630 | 198 | 243 | 121.5 | 10 | 76 |
| Code | Model number | A | B | C | D | H |
| 1 | CQM5E-125 | 30 | 132 | 66 | 8 | 44 |
| 2 | CQM5E-250 | 35 | 126 | 63 | 8 | 44 |
| 3 | CQM5E-400 | 138 | 195 | 97.5 | 10 | 70 |
| 4 | CQM5E-630 | 198 | 243 | 121.5 | 10 | 76 |
| 5 | CQM5E-800 | 198 | 243 | 121.5 | 10 | 76 |
Note: General tolerance grade shall be in accordance with GB/T1804-c.
The figure below shows the rotating handle and installation dimernsions of the manual operating mechanism.
Handle Length Dimensions in the Figure:
For models CQM5-125/250: 65 mm or 95 mm (optional), with 65 mm as the default.
For models CQM5-400/630/800: 95 mm.
For models CQM5E-125/250:65 mm or 95 mm (optional), with 65mm as the default.
For models CQM5E-400/630/800:95 mm.
For models CQM5L-125/250: 65 mm or 95 mm (optional), with 65 mm as the default.
For models CQM5L-400/630/800: 95 mm.
2.3 Fixed Type Rear-Mounting Kit
Dimensions (mm)
CQM5 / CQM5E / CQM5L – 125/250
CQM5 / CQM5E / CQM5L – 400/630/800
| Code | Model number | A | H | H1 | H2 | D |
| 1 | CQM5-63/100 | 111 | / | 60.5 | 102.5 | M8 |
| 2 | CQM5-125 | 135 | / | 58 | 98 | M8 |
| 3 | CQM5-250 | 144 | / | 65 | 104 | M8 |
| 4 | CQM5-400/630 | 224 | 102 | 42 | 82 | M12 |
| 5 | CQM5-800 | 243 | 118 | 33 | 98 | M16 |
| Code | Model number | A | H | H1 | H2 | D |
| 1 | CQM5L-125 | 135 | / | 58 | 98 | M8 |
| 2 | CQM5L-250 | 144 | / | 65 | 104 | M8 |
| 3 | CQM5L-400 | 224 | 102 | 42 | 82 | M12 |
| 4 | CQM5L-630 | 243 | 118 | 33 | 98 | M16 |
| Code | Model number | A | H | H1 | H2 | D |
| 1 | CQM5E-125 | 135 | / | 58 | 98 | M8 |
| 2 | CQM5E-250 | 144 | / | 65 | 104 | M8 |
| 3 | CQM5E-400 | 224 | 102 | 42 | 82 | M12 |
| 4 | CQM5E-630 | 243 | 118 | 33 | 98 | M16 |
| 5 | CQM5E-800 | 243 | 118 | 33 | 98 | M16 |
Note: General tolerance grade shall be in accordance with GB/T 1804-c.
2.4 Plug-in Type, Front-of-Panel
Dimensions (mm)
CQM5 / CQM5E/CQM5L-125/250
CQM5 / CQM5E/CQM5L-400
| Code | Model number | A | B | L1 | L2 | D | E | H |
| 1 | CQM5-125 | 112 | 30 | 30 | 200 | 5.5 | 6.5 | 56 |
| 2 | CQM5-250 | 150 | 35 | 35 | 223 | 5.5 | 8.5 | 73 |
| Code | Model number | A | B | L1 | L2 | D | E | H |
| 1 | CQM5E-125 | 112 | 30 | 30 | 200 | 5.5 | 6.5 | 56 |
| 2 | CQM5E-250 | 150 | 35 | 35 | 223 | 5.5 | 8.5 | 73 |
| Code | Model number | A | B | L1 | L2 | D | E | H |
| 1 | CQM5L-125 | 112 | 30 | 30 | 200 | 5.5 | 6.5 | 56 |
| 2 | CQM5L-250 | 150 | 35 | 35 | 223 | 5.5 | 8.5 | 73 |
Note: General tolerance grade shall be in accordance with GB/T 1804-c.
2.5 Plug-in Type, Rear-of-Panel
Dimensions (mm)
CQM5 / CQM5E/CQM5L-125/250
CQM5 / CQM5E/CQM5L-400
CQM5 / CQM5E / CQM5L-630/800
| Code | Model number | A | B | L | L1 | L2 | d | C | D | E | H1 | H2 |
| 1 | CQM5-125 | 67 | 60 | 90 | 51 | 94 | 6.5 | 162 | 90 | 30 | 20 | 56 |
| 2 | CQM5-250 | 74 | 70 | 100 | 55 | 110 | 6.5 | 179 | 105 | 35 | 27 | 73 |
| Code | Model number | A | B | L | L1 | L2 | d | C | D | E | H1 | H2 |
| 1 | CQM5E-125 | 67 | 60 | 90 | 51 | 94 | 6.5 | 162 | 90 | 30 | 20 | 56 |
| 2 | CQM5E-250 | 74 | 70 | 100 | 55 | 110 | 6.5 | 179 | 105 | 35 | 27 | 73 |
| Code | Model number | A | B | L | L1 | L2 | d | C | D | E | H1 | H2 |
| 1 | CQM5L-125 | 67 | 60 | 90 | 51 | 94 | 6.5 | 162 | 90 | 30 | 20 | 56 |
| 2 | CQM5L-250 | 74 | 70 | 100 | 55 | 110 | 6.5 | 179 | 105 | 35 | 27 | 73 |
Note: General tolerance grade shall be in accordance with GB/T 1804-c.
2.6 Mechanical Interlock
| Parameter | CQM5-125 | CQM5-250 | CQM5-400 | CQM5-630/800 |
| A (3P) | 90 | 105 | 150 | 210 |
| B (3P) | 120 | 130 | 180 | 243 |
| C(3P) | 45 | 50 | 57 | 58 |
| D (3P) | 14 | 16.5 | 10 | 20 |
| L (3P) | 134 | 140.5 | 190 | 240 |
| H (3P) | 22 | 22 | 30 | 20 |
| A (4P) | 120 | 140 | 198 | 280 |
| B (4P) | 150 | 170 | 230 | 310 |
| C (4P) | 45 | 50 | 57 | 58 |
| D (4P) | 14 | 16.5 | 10 | 20 |
| L (4P) | 164 | 233 | 240 | 320 |
| H (4P) | 22 | 22 | 30 | 30 |
| Parameter | CQM5E-125 | CQM5E-250 | CQM5E-400 | CQM5E-630/800 |
| A (3P) | 90 | 105 | 150 | 210 |
| B (3P) | 120 | 130 | 180 | 243 |
| C(3P) | 45 | 50 | 57 | 58 |
| D (3P) | 14 | 16.5 | 10 | 20 |
| L (3P) | 134 | 140.5 | 190 | 240 |
| H (3P) | 22 | 22 | 30 | 20 |
| A (4P) | 120 | 140 | 198 | 280 |
| B (4P) | 150 | 170 | 230 | 310 |
| C (4P) | 45 | 50 | 57 | 58 |
| D (4P) | 14 | 16.5 | 10 | 20 |
| L (4P) | 164 | 233 | 240 | 320 |
| H (4P) | 22 | 22 | 30 | 30 |
| Parameter | CQM5L-125 | CQM5L-250 | CQM5L-400 | CQM5L-630/800 |
| A (3P) | 90 | 105 | 150 | 210 |
| B (3P) | 120 | 130 | 180 | 243 |
| C(3P) | 45 | 50 | 57 | 58 |
| D (3P) | 14 | 16.5 | 10 | 20 |
| L (3P) | 134 | 140.5 | 190 | 240 |
| H (3P) | 22 | 22 | 30 | 20 |
| A (4P) | 120 | 140 | 198 | 280 |
| B (4P) | 150 | 170 | 230 | 310 |
| C (4P) | 45 | 50 | 57 | 58 |
| D (4P) | 14 | 16.5 | 10 | 20 |
| L (4P) | 164 | 233 | 240 | 320 |
| H (4P) | 22 | 22 | 30 | 30 |
Notes: a. Units: mm b. Undefined tolerances comply with GB/T 1804-2000 medium grade (m)
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.
