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WCM5Ex-250 electronic trip MCCB offers 50kA breaking capacity, 400V rated voltage, and overload/short-circuit protection. Available in 3P/4P. Ideal for industrial power distribution.
WCM5Ex-250 electronic trip MCCB offers 50kA breaking capacity, 400V rated voltage, and overload/short-circuit protection. Available in 3P/4P. Ideal for industrial power distribution.
WCM5Ex-250 electronic trip MCCB integrates overload & short-circuit protection in one. 50kA breaking capacity, 400V rated, available in 3P/4P configurations. Precision electronic trip unit ensures reliable safety for industrial & commercial power distribution.
Key Features：
Electronic Trip Unit: Provides precise and adjustable overload (thermal) and short-circuit (magnetic) protection, ensuring reliable coordination with system requirements.
High Breaking Capacity: Offers a robust 50kA short-circuit breaking capacity, delivering reliable fault current interruption in demanding industrial environments.
Wide Voltage Application: Rated for 240/415V~ and 415V~, making it suitable for diverse single-phase and three-phase power distribution systems.
Versatile Pole Configurations: Available in 3P and 4P configurations, providing flexibility for various wiring systems and load requirements.
Applications:
Industrial Power Distribution
Commercial Buildings
Residential Electrical Panels
Infrastructure Projects
| Breaking Capacity | 50 kA |
| Trip Unit Technology | Electronic |
| Material | Copper |
| Model Number | WCM5Ex-250 |
| Rated Voltage | 400 V, 415 V |
| Rated Frequency (Hz) | 50/60 Hz |
| Place of Origin | Zhejiang, China |
| Brand Name | Westhomes |
| Model | WCM5Ex-125 | WCM5Ex-250 | WCM5Ex-400 | WCM5Ex-630(400) | WCM5Ex-630(800) | WCM5Ex-800 | ||||||||||||||
| Shell current (A) | 125 | 250 | 400 | 630 | 630 | 800 | ||||||||||||||
| Interrupting Capacity Level | L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | ||
| Rated current (A) | 32(0.4-1In adjustable) 63(0.4-1In adjustable) 100(0.4-1In adjustable) 125(0.4-1In adjustable) |
250(0.4-1In adjustable) | 400(0.4-1In adjustable) | 630(0.4-1In adjustable) | 630(0.4-1In adjustable) | 800(0.4-1In adjustable) | ||||||||||||||
| polar number | 3/4 | 3/4 | 3/4 | 3/4 | 3/4 | 3/4 | ||||||||||||||
| Rated insulation voltage Ui(V) | AC800 | |||||||||||||||||||
| Rated operating voltage Ue (V) | AC400 | |||||||||||||||||||
| Rated impulse withstand voltage Uimp (V) | 8000 | |||||||||||||||||||
| Short-circuit breaking capacity Icu (kA) | 25 | 50 | 85 | 35 | 50 | 85 | 40 | 55 | 100 | 40 | 55 | 100 | 50 | 70 | 100 | 50 | 70 | 100 | ||
| Short-circuit breaking capacity Ics (kA) | 25 | 50 | 65 | 35 | 50 | 65 | 40 | 55 | 70 | 40 | 55 | 70 | 50 | 70 | 70 | 50 | 70 | 70 | ||
| Short-circuit withstand capability Icw (kA/1s) | 5 | 10 | 10 | 10 | 10 | 10 | ||||||||||||||
| Applicable Category | B | B | B | B | B | B | ||||||||||||||
| Flight arc distance | <50 | <100 | ||||||||||||||||||
| Operational performance | Power on (times) | 1500 | 1000 | 1000 | 500 | |||||||||||||||
| No power supply (times) | 8500 | 7000 | 4000 | 2500 | ||||||||||||||||
| Model | WCM5Ex-125 | WCM5Ex-250 | WCM5Ex-400 | WCM5Ex-630(400) | WCM5Ex-630(800) | WCM5Ex-800 | ||||||||||||||
| Ambient temperature The decline of change Capacity coefficient |
+40℃ | 1In | 1In | 1In | 1In | 1In | 1In | |||||||||||||
| +45℃ | 0.95In | 0.96In | 0.94In | 0.911n | 0.91In | 0.88In | ||||||||||||||
| +50℃ | 0.89In | 0.91In | 0.87In | 0.85In | 0.85In | 0.83In | ||||||||||||||
| +55℃ | 0.84In | 0.87In | 0.81In | 0.80In | 0.80In | 0.79In | ||||||||||||||
| +60℃ | 0.76In | 0.82In | 0.73In | 0.74In | 0.74In | 0.76In | ||||||||||||||
| Selling Units | Single item |
| Quantity (pieces) | 1-4 | 5 – 500 | > 500 |
| Lead time (days) | 7 | 15 | To be negotiated |
This topic is covered in more detail in What is TMA in MCCB.
Westhomes WCM5Ex-250 is a 400V electronic trip molded case circuit breaker (MCCB) designed for advanced low-voltage power distribution systems.
Unlike traditional thermal-magnetic MCCBs, WCM5Ex-250 uses an electronic trip unit to provide more accurate and adjustable protection against overload, short circuit, and other electrical faults.
It is widely used in industrial facilities, commercial buildings, and intelligent power distribution systems requiring high protection accuracy.
The main features include:
Adjustable electronic trip protection
High protection accuracy
Overload and short-circuit protection
Fast fault response
Reliable operation in complex power systems
The electronic trip unit allows engineers to set protection parameters according to actual load conditions.
Westhomes WCM5Ex-250 is designed for AC400V low-voltage distribution systems.
It is suitable for 50Hz/60Hz electrical networks and provides reliable circuit protection for industrial and commercial applications.
WCM5Ex-250 electronic MCCB provides multiple protection functions, including:
Long-time delay protection (overload protection)
Short-time delay protection
Instantaneous short-circuit protection
The adjustable settings help optimize protection coordination between upstream and downstream devices.
The main difference is the trip unit technology.
Thermal-magnetic MCCBs use mechanical thermal and magnetic elements, while WCM5Ex-250 uses an electronic trip unit with higher accuracy and adjustable settings.
Electronic MCCBs are more suitable for applications requiring precise protection coordination and intelligent energy management.
WCM5Ex-250 is commonly used in:
Industrial distribution cabinets
Factory power systems
Commercial buildings
Data centers
Energy management systems
Large electrical equipment protection
It is ideal for applications where continuous and stable power operation is required.
Electronic trip MCCBs provide more precise current detection and adjustable protection settings.
They allow engineers to customize protection parameters according to different loads, improving system safety and reducing unnecessary shutdowns.
Yes, WCM5Ex-250 can be applied in motor protection systems when the protection parameters are correctly configured.
The adjustable electronic trip unit helps coordinate with motor starting characteristics and reduces unwanted tripping during startup.
The breaking capacity of an MCCB determines its ability to safely interrupt short-circuit currents.
The WCM5Ex-250 should be selected according to the short-circuit level of the installation to ensure safe operation.
Westhomes WCM5Ex-250 combines intelligent protection technology, reliable mechanical design, and advanced electronic trip control.
With accurate protection settings and strong adaptability, it provides an efficient solution for modern low-voltage power distribution systems.
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