ABB S271K8A Circuit Breaker

ABB S271-K8A is a 1-pole miniature circuit breaker from ABB's S271 family, designed for DIN-rail mounting in low-voltage distribution panels. This 8 A device uses a type K trip curve to provide overcurrent protection for single-circuit applications, such as lighting, outlets, and control wiring in commercial and light-industrial installations. The compact, 1-module-wide form factor and DIN-rail compatibility enable easy panel integration and reliable mounting in crowded boards. The part is cataloged as S271-K8A, and is also listed in some catalogs as S271K8A, S271-K8, or S271-K8-A, reflecting minor naming variants while preserving the same electrical characteristics. When overcurrent occurs, the breaker trips to interrupt the circuit and protect conductors from insulation damage or equipment faults. Suitable for standard single-pole protection tasks within ABB’s S271 family, this model can be paired with other S271 variants to tailor current ratings and trip profiles to specific loads and wiring schemes.