SIRIUS S0 power contactor, 24 VDC coil
The Siemens 3RT2025-1BJ80 is a SIRIUS S0 power contactor with a 24 VDC coil and screw-type terminals. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, fitting into standard panel layouts with a 45 mm width and 85 mm height. The 107 mm depth leaves clearance for wiring and adjacent components. Rated for 1 000 operating cycles per hour at AC-1, AC-2, AC-3, and AC-3e duty, and 300 cycles per hour at AC-4. That means it handles frequent motor starting and stopping in conveyor or pump applications without derating the mechanical life of 10 000 000 typical operations. The auxiliary contact block carries 10 A at 24 VDC, 2 A at 48 VDC and 60 VDC, 1 A at 110 VDC, 0.9 A at 125 VDC, and 0.3 A at 220 VDC — useful for signaling back to a PLC or relay logic at different control voltages. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in tight enclosures.
Panel integration and wiring
Main contacts accept solid or stranded wire from 1 to 10 mm² (one conductor) or 2x (0.5 to 1.5 mm²) / 2x (0.75 to 2.5 mm²) for two conductors. The screw-type terminals are standard for panel builders — no special tooling needed. Clearance distances: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side. The S0 frame size (45 mm wide) fits alongside other SIRIUS components on the same DIN rail, keeping the panel layout dense. The auxiliary switch is built in, so no separate add-on block is required for basic status feedback.