Circuit breaker Legrand Tx3 404222 C16A 3P 10 kA, 16 A, 3-pole, 10 kA breaking capacity

Legrand Tx3 404222 C16A 3P is a three-pole miniature circuit breaker with a rated current of 16 A and a C‑type trip characteristic. Designed for protection of three‑phase circuits against overload and short‑circuit conditions, this device provides a 10 kA breaking capacity and compact DIN‑rail mounting for use in residential and light commercial distribution boards.

Advantages

The three‑pole configuration enables simultaneous disconnection of all phases to maintain system balance and safety. A C‑type characteristic offers reliable tripping for general-purpose circuits with moderate inrush currents, such as lighting and small motor loads. The 10 kA breaking capacity ensures the breaker can interrupt typical short‑circuit currents in domestic and light commercial installations. The compact design and standard DIN‑rail clip simplify installation and replacement in distribution panels.

Suitable for

• Protection of three‑phase lighting circuits in residential and small commercial installations
• Protection of small motors and HVAC components with moderate startup current
• Use in distribution boards where coordinated protection and simultaneous phase disconnection are required
• Replacement or upgrade of existing three‑pole protective devices in DIN‑rail panels

Key specifications

• Poles: 3 (three‑pole)
• Rated current: 16 A
• Trip characteristic: C‑type (moderate inrush tolerance)
• Breaking capacity: 10 kA
• Mounting: DIN‑rail compatible
• Intended application: Protection against overload and short circuit in low‑voltage distribution

How to use

Install the breaker on a standard 35 mm DIN rail inside the distribution board, ensuring correct orientation and secure mechanical engagement. Connect phase conductors to the top terminals and load conductors to the bottom terminals, following local wiring regulations and ensuring tight, torque‑specified terminations. Verify the breaker rating and characteristic match the circuit requirements, then switch the device to the ON position to restore power. Test the circuit after installation and label the breaker position in the panel for easy identification.

Usage recommendations

Before installation, isolate the distribution panel and confirm absence of voltage. Verify compatibility with upstream protection and downstream loads to ensure proper coordination. Periodically inspect connections for tightness and signs of overheating; replace the device after any heavy fault event or if mechanical damage is observed.