ABB S271-K20A Circuit Breaker 20A 1-Pole 230/400V AC K-Curve 6kA DIN Rail

ABB S271-K20A Circuit Breaker 20A 1-Pole 230/400V AC K-Curve 6kA DIN Rail

The ABB S271-K20A is a single-pole miniature circuit breaker (MCB) from ABB's S200 series, rated 20 amperes with a K-type tripping curve. It mounts on standard 35mm DIN rail and provides overcurrent and short-circuit protection in low-voltage distribution systems. The K-curve characteristic is designed for loads with high inrush currents, tripping at 8–14× rated current for short-circuit events.

Specifications & What's Included

• Manufacturer: ABB
• Model: S271-K20A
• Series: S200
• Type: Miniature Circuit Breaker (MCB), 1-Pole
• Rated Current: 20A
• Trip Curve: K (instantaneous trip range: 8–14× In)
• Voltage Rating: 230/400V AC (as printed on unit label)
• Breaking/Interrupting Capacity: 6kA
• Mounting: 35mm DIN rail
• Standards: IEC/EN 60898
• CE marked
• Includes: Breaker only — no accessories or mounting hardware

Applications

The ABB S200 series MCBs are widely used in industrial control panels, commercial electrical distribution boards, and building services installations throughout Europe and other IEC-standard markets. The K-curve variant is specifically suited for protecting circuits with high inductive or capacitive inrush loads — such as motors, transformers, solenoids, and power supplies — where a standard B- or C-curve breaker would nuisance-trip during startup. Single-pole 20A K-curve breakers in this series are a common choice for machine control cabinets and automation panel builders who need reliable branch-circuit protection without false tripping on motor start currents.