ABB S402M S402M Miniature Circuit Breaker, 2-Pole, 20A, Type C, 440V ac AC, 12 V dc DC, 15 kA Breaking Capacity

This miniature circuit breaker is designed to protect low-voltage circuits by interrupting overloads and short circuits in installations. It operates using combined thermal and electromechanical tripping to respond to both prolonged overloads and instantaneous faults. The device is intended for use where a 2-pole protective device is required and provides manual switching via an I/O reset actuator.

• 15kA breaking capacity delivers fast fault interruption
• Type C tripping characteristic copes with moderate inrush currents
• 12V DC rated operation supports low-voltage DC supplies
• 440V AC rated voltage handles higher AC distribution systems
• Screw Terminal connection ensures secure conductor fastening

• Suitable for two-wire DC control circuit protection
• Ideal for small distribution boards in buildings
• Used with motor feeders having moderate inrush currents
• Can be used for isolating sub-circuits
• Suitable for panels requiring IP20 protection level

Thermal elements give a delayed response to sustained overloads while the electromechanical element provides near-instantaneous interruption for short-circuit events.

It features an I/O reset actuator that permits manual switching and resetting after fault clearance.

Conductors are secured using screw-type terminals designed for solid or stranded wire termination.

The device is constructed in accordance with IEC/EN 60898-1 and IEC/EN 60947-2 requirements.

The enclosure provides IP20 protection, guarding against contact with live parts and large foreign objects.