Legrand TX3 circuit breaker Miniature circuit breaker Type C 1

Legrand Tx3 C20A is a single‑pole miniature circuit breaker (1M) with a C‑characteristic, rated for 20 A nominal current and a rated breaking capacity of 6 kA. It is intended for overcurrent and short‑circuit protection in residential and light commercial electrical installations. The device is compatible with standard DIN‑rail mounting and provides protection for individual circuits such as lighting, socket outlets and small appliances.

Advantages

The breaker combines compact 1M width with a C‑type tripping curve suited to resistive and moderately inductive loads, offering reliable protection for typical household and office circuits. Its 6 kA breaking capacity meets common installation requirements for short‑circuit interruption, while DIN‑rail compatibility ensures straightforward mounting and replacement in standard distribution boards.

Suitable for

Key specifications

How to use

Install the Legrand Tx3 C20A on a standard DIN rail in the distribution board, ensuring the correct orientation and secure mechanical attachment. Connect the line conductor to the supply terminal and the load conductor to the load terminal, observing proper torque values and local wiring regulations. After wiring, switch the breaker to the ON position and verify circuit continuity and correct protection operation by testing under no‑load conditions. Routine inspection should be performed visually and functionally according to local electrical safety standards.

Recommendations

Match the C20A characteristic to the expected load type and inrush currents; for motors or highly inductive loads, verify selectivity and consider a different tripping curve if necessary. Ensure the distribution board and upstream protection coordination comply with applicable electrical codes, and have installation and maintenance performed by a qualified electrician.