Siemens 3RT2018-1BB41 Three-Phase Contactor

Siemens 3RT2018-1BB41 is a three-pole Sirius power contactor in size S00 with a 24 V DC coil, built for AC-3e/AC-3 duty and motor control up to 16 A (7.5 kW at 400 V). The unit integrates three main contacts and one normally open auxiliary contact, with screw terminals for straightforward wiring in control panels or machine electrical cabinets. Weighing roughly 0.29 kg, it carries a 690 V insulation rating and IP20 protection on the front, making it suitable for indoor control environments. As part of Siemens' Sirius 3RT family, this contactor is designed for compact installation while providing reliable switching for motors and other loads in automation and drive systems.