The Siemens 3RA1110-0CA15-1BB4 is a SIRIUS non-fused load feeder configured as a direct starter, size S00. It integrates a supplied contactor (3RT1015-1BB41), a bimetal motor-protection relay, and a circuit-breaker (3RV1011-0CA10) into one unit, plus a link module (3RA1911-1AA00) for the auxiliary switch extension. Rated at 0.06 kW at 400 V, this direct starter is sized for small motor loads — think fractional-horsepower pumps, fans, or conveyor drives in a control panel. The insulation voltage rating of 690 V gives headroom for 400 V line supplies. Snap-on mounting to a standard DIN rail is the intended fastening method. The 45 mm width and 159 mm height fit into a compact panel layout; depth is 75 mm.
Main contact wiring accepts solid or stranded conductors from 0.5 mm² up to 4 mm², with a dual-terminal option for daisy-chaining (2x 0.75–2.5 mm²). AWG equivalents for the main contacts are 2x (18–14). Strip and torque per the terminal markings; the spring-cage style (typical for SIRIUS S00) holds firmly without re-torquing. Shock resistance is 9.8g, adequate for most industrial machinery but not for high-vibration mobile equipment without additional damping.