Legrand TX3 installatieautomaat miniatuurinstallatieautomaat type B 1

Single-pole circuit breaker Legrand 403358 rated 20 A at 230 V provides overcurrent protection for residential and light commercial electrical installations. The device is intended to interrupt overloads and short circuits on a single phase, protecting wiring, devices and connected loads. Its compact format is compatible with standard DIN-rail switchboards and allows straightforward replacement or addition of individual circuit protection for lighting circuits, socket lines and small appliances.

Advantages

The circuit breaker offers a reliable thermal-magnetic trip mechanism to ensure prompt disconnection during overloads and short-circuit events. Its single-pole design minimizes space usage in the distribution board while providing a clear ON/OFF indication and manual switching capability. The product is constructed to meet industry safety and durability standards and is suitable for quick installation and maintenance in typical household and small business environments.

Suitable for

Key specifications

How to use

Install the circuit breaker into a properly sized DIN-rail distribution board by snapping it onto the rail and securing the phase and neutral conductors to the designated terminals using the appropriate torque for the terminal screws. Ensure the supply is de-energized before installation. After wiring, switch the breaker to ON to supply the protected circuit; flip to OFF to isolate the circuit for maintenance or in case of a fault. Testing can be performed by briefly creating a controlled load and confirming the device remains in service under normal current levels and trips when the current exceeds rated limits.

Recommendations

Use this single-pole 20 A, 230 V circuit breaker for individual circuit protection and avoid exceeding the rated current. Verify compatibility with the existing distribution board and ensure installation is performed or inspected by a qualified electrician in accordance with local electrical codes.