Hager MC125A Miniature Circuit Breaker 1P 25A C-Curve 6kA

The Hager MC125A is a high-quality single-pole miniature circuit breaker engineered to provide dependable protection for electrical circuits in both residential and commercial environments. This device is designed to monitor current flow and automatically disconnect the circuit in the event of an overload or short circuit, thereby safeguarding wiring and connected appliances from potential damage. Its robust construction and reliable performance make it a standard choice for modern distribution boards.

Advantages

This circuit breaker offers exceptional reliability and durability, featuring a mechanical service life of up to 20,000 cycles. The C-curve tripping characteristic provides a balanced response, making it suitable for a wide range of general electrical loads. With a breaking capacity of 6kA, it effectively manages fault currents, while the selectivity class 3 ensures optimal coordination with other protective devices in the electrical system. The modular design allows for easy installation and integration into standard electrical panels.

Suitable for

• Residential electrical distribution boards
• Commercial lighting and power circuits
• Protection of general-purpose electrical outlets
• Small industrial equipment installations

When it may not be suitable

This device is not intended for use in circuits requiring a different tripping characteristic, such as B-curve for sensitive electronics or D-curve for high-inrush current motors. It is also not suitable for outdoor environments without an appropriate weather-resistant enclosure due to its IP20 rating.

Key specifications

• Number of poles: 1P
• Rated current: 25 A
• Tripping curve: C
• Breaking capacity: 6 kA
• Voltage: 400 V
• Selectivity class: 3
• Mechanical endurance: 20,000 cycles
• Degree of protection: IP20

How to use

The Hager MC125A should be installed by a qualified electrician in accordance with local electrical regulations. It is designed for mounting on a standard DIN rail within a distribution board. Ensure that the supply voltage and load requirements are compatible with the device specifications before connection. Once mounted, the breaker is operated via the front-facing toggle switch, which indicates the status of the circuit.

What to consider before purchase

• Verify that the 25A rating matches the requirements of your specific circuit load.
• Ensure the C-curve characteristic is appropriate for the types of appliances connected.
• Check that the available space in your distribution board accommodates a single-pole modular device.
• Confirm that the installation environment meets the IP20 protection requirements.

Usage recommendations

For optimal safety and longevity, ensure all terminal connections are tightened to the manufacturer's specified torque settings. Regularly inspect the distribution board for signs of wear and test the breaker functionality periodically to maintain system integrity.