The Siemens SIRIUS 3RA1215-1AL16-0BB4 is a non-fused load feeder configured as a reversing starter, size S00. It integrates a contactor (3RT10 16-1BB42), a bimetal motor-protection relay, a circuit-breaker for short-circuit protection (3RV10 21-1AA15), and a link module (3RA19 11-1AA00) plus an RH assembly kit (3RA19 13-2A) — all pre-assembled in one compact unit. The reversing function lets you change motor rotation direction without an external contactor pair. Rated at 0.55 kW at 400 V, it is sized for small three-phase induction motors — conveyors, pumps, fans — in a standard 400 VAC line. The S00 frame keeps the panel footprint tight: 90 mm wide, 159 mm tall, 75 mm deep.
Snap-on mounting to a DIN rail, horizontal orientation only. Clearance requirements: 20 mm upward, 10 mm forward, 9 mm backward, 20 mm at the sides, zero downward. Wire range: solid 0.5 to 4 mm², or two conductors 0.75 to 2.5 mm². The screw terminals accept standard ferruled or solid copper.