ABB 2CSS255101R0255 SN201-B25 1P+N 25A B-Curve 6kA Miniature Circuit Breaker (MCB)

At In 25 A, the ABB SN201-B25 (SKU 2CSS255101R0255) sits in the middle of the SN201 current range, still a 1-module, 1P+N breaker with a type B curve and 6 kA breaking capacity at 230 V AC. Its screw-cage terminals take conductors up to 16 mm² (rigid) or 10 mm² (flexible), and the 3-5× In instantaneous trip band keeps nuisance tripping low on resistive loads such as sockets or lighting circuits.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1

Selection Notes

At In 25 A, the SN201-B25 covers heavier single-phase resistive circuits, such as electric water heaters or larger lighting banks, than the lower-current SN201 ratings. The type B curve's narrow 3-5× In instantaneous trip band still assumes minimal inrush, so it is not the right choice for circuits with motor starting current even at this higher continuous rating. Screw-cage terminals rated for conductors up to 16 mm² (rigid) keep termination straightforward at this current level.