SIRIUS S0 power contactor, 3 NO, screw terminals, 45 mm
The Siemens 3RT1025-1AP08-0MA0 is a SIRIUS power contactor in the S0 frame size, with three normally-open main contacts and screw-type terminals for the main current circuit. It mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 50022, occupying 45 mm width, 85 mm height, and 140 mm depth. Front protection is IP20; the terminal area is IP00. Rated for motor loads: at AC-2 duty at 400 V it handles 7.5 kW; at AC-4 at 400 V the operating current is 15.5 A. For high-voltage motors, it supports 10 kW at 500 V and 11 kW at 690 V. DC switching ratings are voltage-dependent: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 6 A at 230 V. Operating temperature range is -25 to +60 °C during operation, with a maximum operating altitude of 2 000 m. Pollution degree 3. The contactor is rated for 10 000 000 typical mechanical operations. Side-by-side mounting is permitted with a 6 mm clearance at the side.
Wiring and coordination
Solid and stranded wire capacities for the main circuit: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). For single or multi-stranded conductors: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG equivalents: 2x (16 to 12), 2x (14 to 10), 1x 8. Type 1 coordination requires a gL/gG fuse rated 63 A; Type 2 coordination requires a 25 A gL/gG fuse. The contactor includes 2 auxiliary contacts (instantaneous).