The Siemens 3RA1115-0GL16-2BB4 is a SIRIUS non-fused load feeder configured as a direct starter in size S00. It integrates a contactor, a bimetal overload relay, and a circuit-breaker for short-circuit protection into one unit that snaps onto a DIN rail. The 24 V DC control coil and the 0.18 kW rating at 400 V mean it is sized for small three-phase motor loads — pumps, fans, conveyors — in a control panel where space is tight.
The 24 V DC control coil drops out cleanly below the pick-up threshold. The bimetal overload relay tracks motor heating; the circuit-breaker handles short-circuits.
What is inside the package
This order code ships as a pre-assembled combination: a 3RT1016-1BB41 contactor, a 3RV1021-0GA15 circuit-breaker, and a 3RA1911-1AA00 link module that ties them together mechanically and electrically. The auxiliary switch extension is supported (product extension auxiliary switch: Yes), so you can add a spare NO/NC contact for PLC feedback without re-wiring the power circuit.