ABB S271K20A Circuit Breaker

ABB S271K20A is a 1-pole miniature circuit breaker rated for 20 A at 240 V AC, part of ABB's S271 family designed for DIN-rail mounting in control panels. It uses a K-curve trip characteristic to handle circuits with moderate inrush, and it features screw terminals for secure terminations, enabling reliable connections in compact panel layouts. With IP20 protection and a broad operating temperature range from -40 °C to +70 °C, this breaker is intended for indoor electrical distribution in industrial and commercial environments. Typical applications include protecting single-phase feeders and branch circuits in DIN rail installations inside control panels, delivering predictable overcurrent protection and easy installation.