Legrand Tx3 403361 Miniature Circuit Breaker, 1-Pole, B-Curve, 40A, 6kA

The Legrand Tx3 403361 is a professional-grade 1-pole miniature circuit breaker engineered to provide robust protection for electrical circuits in residential and commercial environments. This device is designed to detect and interrupt overcurrents and short circuits, effectively preventing damage to wiring and connected equipment. With its compact modular design, it integrates seamlessly into standard distribution boards, offering a reliable solution for modern electrical infrastructure.

Advantages

This circuit breaker stands out due to its high manufacturing standards and consistent performance under load. The B-curve tripping characteristic ensures rapid response to short circuits while allowing for standard inrush currents typical of household appliances and lighting circuits. Its 6kA breaking capacity provides a sufficient safety margin for most standard electrical installations, ensuring that the device can safely clear faults without sustaining damage. The modular construction facilitates quick and secure installation on standard DIN rails, making it a preferred choice for electricians and facility managers.

Suitable for

• Residential electrical distribution boards
• Commercial office lighting circuits
• Protection of standard household appliances
• General purpose branch circuit protection

This device may not be suitable for industrial applications requiring higher breaking capacities or specialized tripping curves, such as those needed for large motor starting currents. It is also not intended for use in environments with extreme moisture or corrosive atmospheres without appropriate protective enclosures.

Key specifications

• Number of poles: 1
• Rated current: 40A
• Tripping characteristic: B-curve
• Breaking capacity: 6kA
• Mounting type: DIN rail

Installation should be performed by a qualified professional in accordance with local electrical regulations. The device is mounted onto a standard DIN rail within a distribution board. Ensure that the supply voltage is disconnected before beginning the installation. Once snapped onto the rail, connect the incoming supply wire to the top terminal and the outgoing load wire to the bottom terminal, ensuring all connections are tightened to the manufacturer's specified torque to prevent overheating.

What to consider before purchase

• Verify that the 40A rating matches your circuit requirements
• Ensure the B-curve characteristic is appropriate for your load type
• Check available space in your distribution board
• Confirm compatibility with existing DIN rail systems

For optimal safety and longevity, regularly inspect the circuit breaker for signs of heat damage or loose connections. Do not attempt to modify or repair the internal mechanism of the device.