The Siemens SIRIUS 3RA2110-1GD15-1BB4 is a direct-on-line (DOL) starter — a factory-assembled combination of a contactor and overload relay, sized S00 and designed to snap onto 60 mm busbar systems. It's meant for starting and stopping three-phase motors under full voltage, with the overload relay providing Class 10 protection. Rated 6.3 A at 400 V AC-3 (the motor-switching duty class), it handles motor loads up to about 3 hp at 460/480 V and 5 hp at 575/600 V. The supplied contactor is a 3RT2015-1BB41, and the link module is 3RA1921-1DA00 — it ships as a one-piece assembly, not loose components.
Snaps directly onto 60 mm busbar systems — no DIN rail adapter needed, no extra brackets. Mounting position is vertical only. Clearance: 50 mm upwards, 20 mm forwards, 20 mm at the side, 10 mm downwards, and 0 mm backwards (meaning it can sit flush against a back panel). Dimensions are 45 mm wide, 203 mm tall, 155 mm deep. Main circuit connections are screw-type terminals — no spring-cage here. That's standard for the S00 frame in this series.