SIRIUS 3RT2025-1AF00 — Power Contactor, Size S0, 24 VDC Coil
The Siemens 3RT2025-1AF00 is a SIRIUS power contactor in Size S0, designed for switching motor loads and resistive loads in industrial control panels. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, making it a direct fit for standard panel layouts. The coil is 24 VDC with screw-type terminals, rated for 10 A at 24 V rated value and 14 A at 480 V rated value. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Switching frequency varies by duty class: up to 1 000 operations per hour at AC-1, AC-2, AC-3, and AC-3e maximum, and 300 operations per hour at AC-4 maximum. This means the contactor handles high-cycle motor starting (AC-3) at full rated current without derating, while the lower AC-4 rate accounts for the heavier wear of inching and plugging duty.
Mounting and Wiring
Fastening method is screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715. Mounting position allows +/-180° rotation on a vertical surface, and can be tilted forward/backward by +/-22.5° on a vertical mounting surface. Minimum clearances: 10 mm upwards, 10 mm downwards, 10 mm forwards, 6 mm at the side. Main contact terminals accept solid or stranded wire from 1 to 10 mm²; auxiliary contact terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). Wire preparation is straightforward with screw terminals — no special ferruling required for stranded up to 10 mm². Dimensions: Width 45 mm, Height 85 mm, Depth 97 mm. The S0 frame fits in a 45 mm wide slot on the DIN rail, leaving room for adjacent contactors or overload relays in a motor starter cluster.