Legrand TX3 circuit breaker Miniature circuit breaker Type B 3

LEGRAND TX3 LS B20A 3-pole miniature circuit breaker, model 403403, rated 20 A with 6 kA breaking capacity and 3 modules (3M). Designed to protect three-phase circuits against overloads and short circuits in residential and light commercial installations, it fits standard DIN-rail distribution boards and works with common accessories.

Advantages

The LEGRAND TX3 LS B20A offers reliable overcurrent protection for three-phase installations in a compact 3-module body that saves space in distribution panels. With a 6 kA interrupting capacity and B characteristic (B20A), the breaker is suitable for typical residential and light commercial circuits and is compatible with standard DIN-rail mounting and accessories for straightforward installation and maintenance.

Suitable for

Key specifications

How to use

Mount the LEGRAND TX3 LS B20A on a standard DIN rail inside the electrical distribution board. Connect the three phase conductors to the corresponding terminals and tighten them to the torque values specified by local regulations or the device documentation. Use the breaker to protect circuits from overloads and short circuits; after wiring, test the device to ensure correct operation and verify that it trips under fault conditions.

Recommendations

Check compatibility with your distribution board and ensure coordination with upstream protection. Follow national wiring regulations and, if necessary, use a qualified electrician for installation and testing.