Siemens 3RT2018-1AK61 Three-Phase AC Contactor

Siemens Sirius 3RT2018-1AK61 is a 3-pole power contactor rated for AC-3 duty, designed to switch three-phase loads up to 7.5 kW at 400 V and a rated load of 16 A. This size S00 device uses a 120 VAC coil (operating at 50/60 Hz) to energize its main contacts, and it includes one normally open auxiliary contact for control wiring. The unit features screw-terminal connections for straightforward wiring and a compact footprint suitable for panel mounting. With three main contacts and an integrated auxiliary contact, it supports interlocking and signaling needs within motor-control circuits. Typical applications include starting small- to mid-sized three-phase motors in automation lines, conveyors, and machine tools, where reliable AC-3 switching and a separate control circuit are required. The 3RT2018-1AK61 belongs to Siemens Sirius 3RT2 family, offering a compact, reliable solution for panel builders and integrators seeking a dedicated motor-contactor with a 16 A rating and a 120 V coil.