Circuit breaker Legrand Tx3 C10A 3-pole 6 kA 3M (MPN 403543)

Legrand Tx3 C10A 3-pole miniature circuit breaker is designed for reliable protection of three-phase low-voltage electrical circuits. With a C characteristic and a rated current of 10 A, this 3-module device provides overcurrent and short-circuit interruption for residential and light commercial installations. Its 6 kA short-circuit breaking capacity and compact DIN-rail form factor make it suitable for distribution boards where space and safety are important.

Advantages

The breaker combines a defined tripping curve (C type) with a rated current of 10 A to ensure selective response to overloads and moderate short-circuits while avoiding nuisance trips from motor-starting currents. A 3-pole configuration enables simultaneous disconnection of all phases, improving safety in three-phase circuits. The 6 kA breaking capacity meets common requirements for household and small commercial electrical networks. The 3-module width facilitates installation in standard distribution enclosures and supports DIN-rail mounting for straightforward panel assembly.

Suitable for

• Protection of three-phase lighting circuits in homes and small businesses
• Safeguarding small motors and pumps with moderate inrush currents
• Use in distribution boards for residential and light commercial installations
• Branch circuit protection for socket outlets and small appliance circuits

Key specifications

• Poles: 3-pole device for simultaneous phase disconnection
• Tripping characteristic: C-type curve (suitable for general-purpose circuits with moderate inrush)
• Rated current: 10 A
• Breaking capacity: 6 kA
• Width: 3 modules (suitable for standard DIN-rail distribution boards)
• Mounting: DIN-rail compatible

How to use

Install the breaker on a standard DIN-rail inside the distribution board, ensuring correct alignment and secure latch engagement. Connect incoming and outgoing conductors to the appropriate phase terminals, observing correct tightening torque and ensuring all connections are made with power off. Use the breaker to protect the targeted three-phase circuit by setting it in the ON position during normal operation and switching it OFF for maintenance or troubleshooting. After any fault clearing, verify the circuit before returning the breaker to service.

Usage recommendations

Confirm that the 10 A rated current and C tripping curve match the load characteristics of the intended circuit. Coordinate with upstream protection devices to maintain selectivity where required. Periodically inspect terminal tightness and the integrity of insulation in the distribution board. For installations subject to high fault levels or special regulations, consult applicable standards and a qualified electrician.