The Siemens 3RA1110-0BA15-1AB0 is a SIRIUS non-fused load feeder in size S00, configured as a direct starter. It combines a contactor, a bimetal motor-protection relay, and a circuit-breaker for short-circuit protection into a single, pre-assembled unit that snaps onto a DIN rail. Rated for motor loads up to 0.06 kW at 400 V, with a 24 V 50 Hz coil, this unit is sized for small motors — pumps, fans, conveyors — in a control panel where you want coordinated protection without wiring three separate components. The supplied circuit-breaker (3RV1011-0BA10) provides the short-circuit protection, the bimetal relay handles overload, and the contactor (3RT1015-1AB01) does the switching. The link module (3RA1911-1AA00) ties them together mechanically and electrically.
The 45 mm wide footprint fits standard panel layouts. Clearance: 20 mm above, 10 mm forward, 9 mm backward, 0 mm below. Terminal capacity: solid or stranded 0.5 to 4 mm², with dual terminals accepting 2x 0.75 to 2.5 mm². AWG equivalent for main contacts is 2x 18 to 14.