ABB S201U-K4 1 Pole Miniature Circuit Breaker

ABB S201U-K4 is a 1-pole miniature circuit breaker rated at 4 A, designed for DIN-rail mounting in System pro M compact panels to protect single‑phase circuits. It is part of ABB’s System pro M compact family and uses a thermal‑magnetic trip mechanism to provide overcurrent protection for 240 V AC systems at 50/60 Hz and is UL 489 listed for compatibility with standard distribution boards. The unit weighs 0.140 kg and carries the order code 2CDS271417R0337, confirming the S201U-K4 configuration in ABB’s catalog. With its compact, single‑pole form factor, it is intended for protecting branch circuits in commercial and light industrial control panels, electrical enclosures, and other installations where space is limited and a 4 A rating is appropriate. Its DIN‑rail mounting and ABB design compatibility support straightforward installation and replacement within a modular System pro M compact distribution scheme.