Hager MBN340E 3-Pole Miniature Circuit Breaker 40A B-Curve 6kA

The Hager MBN340E is a high-quality 3-pole miniature circuit breaker engineered to provide robust protection for electrical circuits in both residential and commercial environments. With a rated current of 40A and a B-type tripping characteristic, this device is designed to detect and interrupt overloads and short circuits effectively, ensuring the safety of your electrical infrastructure and connected appliances.

Advantages

This circuit breaker stands out due to its reliable performance and durable construction, which are hallmarks of the Hager brand. The B-curve tripping characteristic makes it particularly effective for circuits with low inrush currents, providing a balanced approach to protection. Its 6kA breaking capacity ensures that the device can safely handle significant fault currents, minimizing the risk of damage to the electrical system. The 3-pole configuration allows for the simultaneous disconnection of three phases, making it an essential component for three-phase power distribution systems.

Suitable for

• Residential electrical distribution boards
• Commercial building power systems
• Protection of lighting circuits
• General purpose three-phase electrical installations

This device may not be suitable for circuits with high inrush currents, such as those powering large electric motors or transformers, where a C-curve or D-curve breaker would be more appropriate to prevent nuisance tripping. It is also not intended for use in DC electrical systems.

Key specifications

• Number of poles: 3
• Rated current: 40A
• Tripping characteristic: B-curve
• Breaking capacity: 6kA
• Operating voltage: 230/400V AC

The Hager MBN340E is designed for installation on a standard DIN rail within a distribution board. It should be installed by a qualified electrician in accordance with local electrical regulations. Ensure that the supply is disconnected before beginning the installation process and verify that the wire gauge is appropriate for a 40A load.

What to consider before purchase

• Verify that the 40A rating matches your circuit requirements
• Ensure the B-curve characteristic is suitable for your specific load type
• Check that your distribution board has sufficient space for a 3-pole module
• Confirm compatibility with your existing electrical system voltage

Usage recommendations: Regularly inspect the circuit breaker for any signs of physical damage or discoloration. It is recommended to perform a periodic functional check to ensure the tripping mechanism remains operational. If the breaker trips, investigate the cause of the overload or short circuit before resetting the switch.