Interruttore automatico Legrand Tx3 B25A 1P 6kA, 25 A, unipolare (MPN 403359)

Legrand Tx3 B25A 1P 6kA is a single-pole miniature circuit breaker designed to protect electrical circuits from overloads and short circuits. Rated for 25 A with a 6 kA interrupting capacity, this breaker is intended for use in residential and light commercial distribution boards and mounts on a standard 35 mm DIN rail. The compact Tx3 design offers selective protection for individual phase conductors while maintaining compatibility with common modular switchgear systems.

Advantages

The single-pole configuration simplifies installation in single-phase circuits and saves space in compact distribution enclosures. With a 6 kA breaking capacity and thermal-magnetic tripping characteristics, the breaker provides reliable protection against both overload and short-circuit events. The device is compatible with standard DIN-rail accessories and wiring practices, enabling fast replacement or integration into existing panels without modification.

Suitable for

Key specifications

How to use

Install the breaker on a standard 35 mm DIN rail inside the distribution board, ensuring the device is mounted in the correct orientation. Connect the incoming phase conductor to the line terminal and the load conductor to the load terminal, tightening the screw terminals to the manufacturer’s recommended torque. Verify that the neutral and protective earth conductors are correctly connected in the board and that the overall wiring complies with local electrical codes. After wiring, switch the breaker to the ON position and test the circuit under no-load conditions before connecting sensitive equipment.

Recommendations

Use the breaker as part of a coordinated protection scheme: match the upstream and downstream protective devices to ensure selectivity. Perform installation and testing by a qualified electrician and follow local regulations. Periodically inspect terminal tightness and the device for signs of overheating or mechanical damage; replace if any defect is detected.