The Siemens 3RT1024-3AF04-ZW95 is a SIRIUS power contactor in size S0, built for switching three-phase motor loads up to 7.5 kW at 690 V or 5.5 kW under AC-2 duty at 400 V. Three normally-open main contacts handle the power path; the screw-type terminals accept 2x (1... 2.5 mm²) stranded or solid, with a max of 2x 10 mm².
For control-circuit or resistive loads, AC-12 maximum operating current is 10 A. The coil draws 0.8 to 1.1 A at 50 Hz, 110 V nominal. IP20 on the front, IP00 at the terminals: panel builders should guard the live screw terminals behind a door or cover.
The 45 mm width and 85 mm height fit the S0 envelope — common on DIN-rail assemblies alongside overload relays and busbars. Screw terminals accept 2x (1... 2.5 mm²) for control wiring; main power conductors can go up to 2x 10 mm² or a single 10 mm². The solid wire range is 2x (0.25... 2.5 mm²). Auxiliary contact block options (not included here — this is a bare 3-pole main contactor) snap onto the front or side.