ABB SMISSLINE TP S400M Miniature Circuit Breaker, 1-Pole, 20A, Type Z, 230V AC, 230 V DC, 15 kA Breaking Capacity

This miniature circuit breaker provides overcurrent protection for single-pole circuits in low-voltage installations. Designed for DIN-rail mounting, it operates on both DC and AC supplies at 230 V and uses a specialised tripping mechanism to isolate faults quickly. The unit includes a reset I/O actuator and screw terminals for secure connections while meeting the applicable IEC/EN standard for industrial switching devices.

• 20 A current capacity reduces overload risk on 20 A circuits
• Type Z tripping characteristic protects sensitive downstream devices
• 15 kA breaking capacity limits fault energy during short circuits
• UC‑Z tripping mechanism ensures Rapid disconnection under faults
• IP20 protection rating maintains internal contact safety

• Suitable for distribution boards in industrial control cabinets
• Ideal for protecting small DC/AC motor circuits
• Used with single-phase lighting and socket circuits
• Can be used for machine control circuit isolation
• Suitable for retrofit panel upgrades requiring Compact protection

It is rated for operation at 230 V on both DC and AC supplies.

The design suits DIN-rail installation and uses screw terminals for conductor attachment.

It offers a 15 kA breaking capacity for high-energy fault interruption.

The Type Z characteristic trips Faster on low-level faults to protect sensitive loads.

The unit incorporates an I/O reset actuator to manually restore the circuit after a trip.