Siemens 3RT2024-1AC20 Three-Phase AC Contactor

Siemens 3RT2024-1AC20 is a three-pole Sirius power contactor designed for AC-3e/AC-3 motor-start duty, featuring a 24 V AC coil and a compact S0-size package. It is rated for 12 A at up to 400 V and can switch motors up to 5.5 kW at 400 V, making it suitable for motor control in panels and industrial automation. The unit includes one normally open and one normally closed auxiliary contact, uses screw terminals for secure wiring, and has a main circuit insulation rating of 690 V. Weighing about 0.406 kg, it is designed for operation from -25 to +60 C with 50/60 Hz supply. The 3RT2024-1AC20 belongs to Siemens' SIRIUS 3RT2 power contactor family, offering high mechanical life with up to 10,000,000 operating cycles in standard configurations and a compact footprint for space-constrained installations. Common applications include starting and stopping 3-phase motors in conveyors, pumps, fans, and general machine control panels, where reliable switching and a built-in auxiliary feedback are required.