Siemens 3RT2024-1AC20 Three-Phase AC Contactor

Siemens 3RT2024-1AC20 is a three-pole Sirius power contactor with a 24 V AC coil (AC-3e/AC-3 duty) and screw-terminal connections in size S0. It is rated for 12 A at 400 V and can switch up to 5.5 kW in a 400 V three-phase circuit, making it suitable for starting and stopping medium-power motors. The device includes one normally open and one normally closed auxiliary contact (NO+NC) to support control circuits and interlocking, with 50/60 Hz operation. Typical applications include conveyors, pumps, and machine tools in industrial automation, where a compact, reliable contactor is used to control motor loads. Wiring is via screw terminals, and the S0 size is designed for compact panel installations.