ABB S201U-K0.5 DIN Rail Mounted Miniature Circuit Breaker

ABB S201U-K0.5 is a DIN-rail-mounted, 1-pole miniature circuit breaker rated for 0.5 A with a K‑curve thermal‑magnetic trip for precise overload protection and fast disconnection during short circuits. It belongs to ABB’s System pro M compact S200 family and is designed for plug‑in installation on standard TH35 DIN rails in control panels or distribution boards. Key specifications include a short‑circuit current rating up to 10 kA (Icu) and 7.5 kA (Ics), a voltage rating up to 240 V AC (UL/CSA), and an operating temperature range of -25 to +55 C. The device uses screw terminals compatible with solid conductors from 0.75 to 25 mm2 and flexible conductors from 0.75 to 16 mm2 (ferrule‑terminated), with a tightening torque of 2.8 N·m. It supports mounting on TH35‑7.5 or TH35‑15 rails and allows mounting in any position. Enclosure protection is IP20 on open devices and IP40 when installed within an enclosure with a cover. Electrical and mechanical endurance are rated at 20,000 cycles each, and the part is identified as S201U‑K0.5 (2CDS271417R0157) within ABB’s S200/System pro M compact lineup for traceability and compatibility with other system components.