Legrand TX3 interruttore automatico interruttore automatico tipo B 3

The Legrand Tx3 3-pole circuit breaker B6A provides thermal-magnetic protection for three-phase electrical installations. Designed for mounting in modular distribution boards, this compact device interrupts fault currents and limits overloads up to a specified breaking capacity. The B curve characteristic offers fast disconnection for short-circuit events while maintaining tolerance for temporary inrush currents from motors and transformers, making it suitable for mixed residential and light-commercial electrical circuits.

Advantages

The device combines thermal and magnetic tripping in a single compact module, ensuring reliable overload and short-circuit protection. Its three-pole design allows simultaneous disconnection of all phases to maintain system safety. The compact form factor and DIN-rail compatibility simplify installation and save space in distribution boards. The specified breaking capacity ensures secure interruption of fault currents typical for domestic and small commercial systems.

Suitable for

Key specifications

How to use

Install the circuit breaker on a standard DIN-rail inside the distribution board, ensuring correct phase and neutral wiring according to local electrical codes. Connect supply and load conductors to the appropriate terminals and tighten terminals to the manufacturer’s recommended torque. After installation, switch the device to the ON position and verify correct operation by checking circuit continuity and performing any required commissioning tests. For safety, isolate supply power before installation or maintenance and follow applicable regulations.

Recommendations

Use this circuit breaker where a B curve thermal-magnetic characteristic is appropriate—typical for general-purpose circuits and circuits with moderate inrush currents. Verify that the rated current and breaking capacity are suitable for the installation’s prospective fault level and coordinate with upstream and downstream protection devices for selective tripping where required.