What it is and where it fits
The Siemens 3RT2025-1AD00 is a SIRIUS power contactor in the S0 frame size, 45 mm wide, designed for screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715. Its 97 mm depth and 85 mm height define the panel envelope; the S0 frame is the mid-range size in the SIRIUS contactor family, balancing compactness with current-carrying capacity for motor and resistive loads.
Key ratings and what they mean for your panel
Rated for 1 000 operating cycles per hour in AC-1, AC-2, AC-3, and AC-3e duty, and 300 cycles per hour in AC-4 — the AC-4 figure governs frequent inching or plugging applications where contact wear accelerates. Operating temperature spans -25 to +60 °C, with storage from -55 to +80 °C, so it can sit in a non-climate-controlled warehouse but needs derating consideration above 40 °C in the panel. Main contact screw terminals accept solid or stranded wire from 1 to 10 mm²; auxiliary contact wiring uses 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) — plan your gland plate and ferrule kit accordingly. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight enclosures.
Panel integration notes
Snap-on to 35 mm DIN rail per DIN EN 60715; screw fixing also available for vibration-prone environments. Clearance: 10 mm upwards, 10 mm forwards, 6 mm at the side, 10 mm downwards — verify these against adjacent components, especially busbars or wire ducts. Auxiliary switch block is fitted as standard; if you need more contacts, the S0 frame accepts add-on blocks without changing the DIN footprint.