Siemens 3RT2018-1AB02 Three-Phase Electromechanical Contactor

Siemens 3RT2018-1AB02 is a three-pole Sirius power contactor designed for AC-3 motor-control duty, delivering three normally open main contacts and one normally closed auxiliary contact for signaling or interlock functionality. The main contacts are rated for 16 A with a 7.5 kW load at 400 V and operate on 50/60 Hz, making it suitable for AC-3e applications such as starting and stopping 3-phase motors, fans, and pumps in industrial controls. The coil is 24 V AC, enabling control from standard control circuits, and the unit is a compact size S00 with screw terminal connections for secure wiring. This 3RT2-series device is frequently used in control panels where space is at a premium, offering reliable motor control with an integrated auxiliary contact for PLC feedback or interlock circuits. The part number 3RT2018-1AB02 is consistently listed as a 3-pole, 16 A, 24 V coil contactor with AC-3/AC-3e ratings and 1 NC auxiliary contact, ensuring a direct fit for compatible Siemens Sirius systems.