Legrand TX3 circuit breaker Miniature circuit breaker Type B 1

Single-pole circuit breaker Legrand 403357 rated 16 A at 230/400 V~ provides overcurrent protection for residential and light commercial electrical installations. The device is a compact DIN-rail mount miniature circuit breaker (MCB) designed to interrupt fault currents up to its rated breaking capacity and to allow manual switching and protection of branch circuits.

Advantages

The Legrand 403357 uses a B-characteristic trip curve for reliable protection of standard resistive and slightly inductive loads, with a rated breaking capacity of 6 kA according to IEC/EN 60898-1. It is a single-pole device suitable for 230/400 V~ systems and complies with IEC/EN 60898-1 and related VDE and ÖVE standards, ensuring compatibility with common distribution boards and installation practices.

Suitable for

Key specifications

How to use

Mount the Legrand 403357 on a standard DIN-rail inside a distribution board. Connect the phase conductor to the breaker input and the load conductor to the output, following applicable wiring regulations and ensuring the installation is de-energised during work. Use the manual toggle to switch the circuit on or off; the breaker will trip automatically in case of overcurrent or short-circuit conditions within its rated limits.

Recommendations

Verify the load current does not exceed the 16 A rating and select B-characteristic protection when protecting typical lighting and socket circuits. Coordinate the MCB with upstream and downstream protective devices according to local regulations and test the breaker function after installation.