Siemens AG 3RT2018-1AB01 Three-Phase Contactor

The Siemens 3RT2018-1AB01 is a compact Sirius 3RT2 three-pole power contactor with a 24 V AC control coil and a single normally open auxiliary contact, designed for reliable motor control in industrial automation. In AC-3 duty, the main contacts carry up to 16 A, and the device is rated for up to 7.5 kW at 400 V, making it suitable for starting and stopping small to mid-size three‑phase motors such as conveyors, pumps, and fans. It features screw-terminal main contacts, a 24 V AC coil rated for 50/60 Hz, and a maximum coil-to-main isolation voltage of 400 V, all packaged in the compact S00 size for space-constrained panel installations. The 1 NO auxiliary contact provides simple control feedback for interlocks or sequencing, and the overall design aligns with Siemens SIRIUS 3RT2 motor starters for easy integration into existing control schemes.