SIRIUS 3RT2015-1KB41 — Coupling Contactor, S00 Frame, 24 VDC
The Siemens SIRIUS 3RT2015-1KB41 is a coupling contactor in the S00 frame size, designed for switching resistive and motor loads in control panels. It mounts on a 35 mm DIN rail per DIN EN 60715 via screw or snap-on fastening, with a 45 mm width that fits standard enclosure spacing. The 24 VDC coil is rated for continuous duty, with a pickup dropout ratio around 0.7 of rated voltage — meaning it holds in reliably down to roughly 16.8 V and drops out cleanly below that, which matters when sizing a 24 VDC power supply shared with PLC outputs or sensors. Main contact ratings: 10 A at 24 VDC, 3 A at 400 VAC. The DC switching capacity drops significantly with voltage — 2 A at 48 V, 0.3 A at 220 V — so verify the load curve against your circuit before committing the BOM line. AC-1 resistive switching goes up to 1,000 operations per hour; AC-3 motor duty is rated at 750 ops/h. Arcing time runs 10–15 ms, which is typical for this contactor class and means the arc extinguishes fast enough for most relay-coil and small-motor loads without external suppression.
Panel Integration & Wiring
Terminals accept solid or stranded conductors from 0.5 to 4 mm², with screw-type connection on the magnet coil. The S00 frame keeps the contactor compact at 58 mm tall and 73 mm deep, leaving room alongside terminal blocks or a PLC rack. Mounting position is flexible: ±180° rotation on a vertical surface, plus ±22.5° tilt forward/backward — useful when the contactor sits on a swing frame or angled subpanel. Clearances: 10 mm upwards and forwards, 6 mm at the sides, 10 mm downwards — enough for standard wiring ducts without crowding. Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C. The -25 °C lower limit is fine for most indoor panel environments but check if your application sees freezing conditions in an unheated enclosure — the contactor will start and hold, but the coil inrush at low temperature draws higher current, so verify the 24 VDC supply can deliver the peak. Mechanical life is rated at 30 million operations typical, which outlasts the electrical life at full load by a wide margin.