Siemens 3RT1015-2BW41 SIRIUS Power Contactor — S00 Frame, 24 VDC Coil, Spring-Loaded Terminals
The Siemens 3RT1015-2BW41 is a SIRIUS power contactor in the Size S00 frame. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 50022, with a 45 mm width that permits side-by-side mounting. Rated operational currents span 10 A at 24 V up to 0.3 A at 220 V in the DC switching curve, and motor power ratings reach 3 kW at 400 V AC-2 duty or 4 kW at 690 V. The 24 VDC coil draws 3.3 W holding power, with a pickup threshold of 0.85 x rated voltage and a dropout below the 1.1 x full-scale ceiling — a standard DC solenoid curve that panel builders can budget without surprises.
Duty Ratings and Coordination — What the Numbers Mean for Your Circuit
The AC-2 rating of 3 kW at 400 V is the figure that governs motor switching for slip-ring or wound-rotor motors where the contactor makes and breaks under load. AC-4 at 400 V is rated 6.5 A — that covers plugging or inching duty on squirrel-cage motors, where the contactor sees the locked-rotor current each cycle. For resistive loads (AC-12), the maximum operating current is 10 A. Short-circuit coordination is specified: Type 2 coordination requires a gL/gG fuse rated 20 A; Type 1 coordination allows up to 35 A. Pollution degree 3 (conductive pollution) means the contactor is suited for industrial environments where temporary condensation or light dust is expected — no additional conformal coating needed for standard panel conditions. Mechanical endurance is rated at 30 million operations — that is a fast mover for high-cycle applications like conveyor diverters or packaging machine indexing. The IP20 rating on the front and terminals means the contactor is touch-safe for panel interiors but not washdown-rated; keep it behind an enclosure door in wet areas.
Panel Fit and Wiring — S00 Footprint, Spring-Cage Terminals
The 45 x 60 x 73 mm envelope of the S00 frame leaves room for auxiliary contact blocks. The spring-loaded terminal accepts 2x (0.25 to 2.5 mm²) or 2x (24 to 14 AWG). Operating temperature range is -25 to +60 °C, with a maximum altitude of 2,000 m before derating. Side-by-side mounting is permitted, which simplifies multi-contactor assemblies for star-delta or reversing starters. The 6 mm clearance to adjacent components on the side is the minimum — no extra gap needed when stacking multiple SIRIUS contactors on the same DIN rail.
Sourcing and Lifecycle — Active Part, Quoted to Order
This contactor is sourced and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time through independent distribution.