The Siemens SIRIUS 3RA2115-0GD15-1BB4 is a non-fused motor starter in the 3RA2 family, configured as a direct starter — meaning it combines a contactor and overload relay in one package for straightforward on/off motor control. It's built in frame size S00 and snaps onto 60 mm busbar systems, which is the standard mounting for compact motor feeder assemblies in control panels. Rated for 180 W at 400 V and 500 V in AC-3 duty, and 250 W at 690 V, this starter handles small motor loads — pumps, fans, conveyors — in three-phase circuits up to 690 V. The magnetic short-circuit trip and integrated short-circuit protection (the supplied 3RV2011-0GA15 circuit-breaker) mean you don't need a separate fuse or MCCB upstream for the motor branch — it's self-protected within its ratings.
What's in the box and how it fits
This order code ships as a pre-assembled combination: the 3RT2015-1BB41 contactor, the 3RA1921-1DA00 link module, the 3RV2011-0GA15 circuit-breaker, and the 8US1251-5DS10 busbar adapter — everything needed for a single motor feeder, ready to snap onto the busbar. Dimensions are 200 mm high, 45 mm wide, and 155.1 mm deep — the width is a single 45 mm module, so it occupies one slot on the DIN rail or busbar. Mounting position is vertical, with required clearances: 20 mm upward, 10 mm downward, 9 mm to the side, and no space needed forward or backward — important to note when laying out the panel to avoid heat buildup from adjacent devices. The coil is 24 V DC with a holding power of 4 W — low enough to be driven by a standard 24 V DC power supply or PLC output, but check the inrush if multiple starters pull simultaneously. An auxiliary switch can be added (product extension auxiliary switch = Yes) for feedback to the PLC or status indication on the panel door.