Siemens 3RT2027-1AC20 Industrial Three-Phase Contactor

Siemens 3RT2027-1AC20 is a three-pole power contactor for AC-3e/AC-3 duty, intended to switch three-phase motor circuits in industrial control panels. It uses a 24 V AC coil rated for 50/60 Hz and comes in Siemens’ compact size S0 housing with screw-terminal connections. The contactor is rated to carry 32 A and, at 400 V, can switch up to 15 kW of motor load, making it suitable for controlling pumps, fans, conveyors, and machine tools in automated lines. It includes one normally open and one normally closed auxiliary contact (1 NO + 1 NC) to support basic signaling or interlocking functions in control circuits. As part of the Sirius 3RT family, the 3RT2027-1AC20 is designed to provide reliable motor-start and stop operations in industrial equipment while integrating with standard Siemens control components. This model’s coil voltage, current rating, and power-handling specifications align with typical motor starters used in panel-level motor control applications.