Siemens 3RT2038-1AC20 Industrial Electrical Contactor

Siemens 3RT2038-1AC20 is a three-pole power contactor designed for AC-3e/AC-3 motor-start duty, capable of switching up to 80 A and delivering about 37 kW at 400 V. The device is coil-driven with a 24 V alternating-current coil (50/60 Hz), using standard A1/A2 coil terminals, and it includes an integrated auxiliary contact block: 1 normally open and 1 normally closed contact for feedback or interlock circuits. Wiring is via screw terminals, and the unit is categorized as size S2 for mounting and installation versatility. Rated for voltages up to 690 V AC on the load side, the 3RT2038-1AC20 is suitable for starting and protecting three-phase motors in a range of industrial applications, including pumps, conveyors, fans, and other equipment in HVAC and process automation. When paired with matching overload protection and control circuitry, it provides reliable motor control with a compact footprint and a straightforward wiring scheme.