Legrand M250 Motor Circuit Breaker 3P, 0.12kW, 0.4-0.63A, 1NO/1NC

The Legrand M250 motor circuit breaker is a high-quality, three-pole protection device engineered to safeguard electric motors with power ratings up to 0.12kW. This compact and robust unit is specifically designed to provide reliable protection against electrical faults, including overloads and short circuits, in various industrial and commercial environments. By integrating precise thermal release capabilities with auxiliary contact functionality, this device ensures both the safety of the motor and the efficiency of the control system.

Advantages

This motor circuit breaker offers exceptional reliability and precision in monitoring electrical currents. The adjustable thermal release range allows for fine-tuning the protection settings to match the specific requirements of the connected motor, preventing unnecessary downtime while ensuring comprehensive coverage against thermal stress. The inclusion of integrated auxiliary contacts simplifies the wiring process and provides essential feedback on the status of the breaker, making it a versatile solution for modern electrical installations.

Suitable for

• Industrial motor control panels
• Commercial HVAC systems
• Conveyor belt motor protection
• Pump and fan control applications
• Small machinery and automation equipment

When it may not be suitable

This device is not intended for use with motors exceeding the 0.12kW power rating or applications requiring current settings outside the 0.4-0.63A range. It is also not suitable for environments with extreme moisture or corrosive gases unless housed in an appropriate protective enclosure.

Key specifications

• Number of poles: 3
• Power rating: 0.12kW
• Thermal release adjustment range: 0.4-0.63A
• Auxiliary contacts: 1 Normally Open (NO) and 1 Normally Closed (NC)
• Protection type: Overload and short-circuit protection

How to use

Installation should be performed by a qualified electrician in accordance with local electrical codes. The device is typically mounted on a standard DIN rail within a control cabinet. Once mounted, connect the power supply to the input terminals and the motor leads to the output terminals. Use the adjustment dial on the front of the unit to set the thermal release current to match the rated current of the motor. Ensure all connections are tightened to the specified torque before energizing the circuit.

What to consider before purchase

• Verify the full load current of your motor matches the 0.4-0.63A adjustment range
• Ensure the power rating of the motor does not exceed 0.12kW
• Check available space in your control panel for DIN rail mounting
• Confirm the need for auxiliary contact integration in your control logic

Usage recommendations: Regularly inspect the terminal connections for tightness and ensure the device is free from dust or debris to maintain optimal thermal performance. Test the auxiliary contact functionality during routine maintenance cycles to ensure reliable system feedback.