ABB S201UDC-K15 Industrial Safety Relay Module

ABB S201UDC-K15 is a single-pole miniature circuit breaker (MCB) with a DC rating and a K-curve trip characteristic. It provides 15 A nominal protection at 125 V DC, occupies a 1-module width (1 TE) and has a mounting depth of 69 mm; the device's insulation rating is Ui 440 V and it withstands impulse voltage Uimp of 4 kV. This MCB carries a rated short-circuit current (Icn) of 14 kA under EN 60898 conditions at 230 V, with Icu likewise listed at 14 kA per IEC 60947-2 at 230 V. It is IP20 and operates in temperatures from -25 to 55 C; conductor terminal ranges are 0.75–16 mm² for multi-strand and 0.75–25 mm² for single-strand. The S201UDC-K15 is designed for DC circuits and is not intended for flush mounting, providing protection in compact DC distribution or control panels where a 15 A, 1-pole breaker is appropriate for moderate inrush and fault events. The 1-pole, DC-rated K-curve device protects low-energy DC circuits in industrial automation, power supplies, and battery-powered systems where disconnection of a faulted line is required.