The Siemens 3RT2015-1BW41 is a SIRIUS power contactor in size S00, designed for switching motor loads in control panels. It carries a 48 V DC coil with screw-type terminals and includes an auxiliary switch. The contactor mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, fitting into a compact 45 mm wide footprint with a depth of 73 mm and height of 58 mm. Rated for a main contact range of 20 to 12 A, the 3RT2015-1BW41 handles switching frequencies up to 1000 cycles per hour in AC-1 duty, 750 in AC-2 and AC-3, and 250 in AC-4. Mechanical life is typical 30 million operations.
Sizing and Duty Class
The headline rating here is the AC-3 switching current: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. These numbers govern motor switching capability — the contactor is sized for small induction motors up to about 0.75 hp at 230 V. The AC-1 resistive rating is higher, but for motor loads the AC-3 figure is the one that decides fit.
Mounting and Wiring
Mounts on 35 mm DIN rail (EN 60715) with screw or snap-on. Clearance: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side. Wiring accepts solid 0.5 to 4 mm², stranded 0.5 to 4 mm², and fine-stranded 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². Operating temperature range is -25 to +60 °C; storage range -55 to +80 °C.