Siemens 3RT2018-1BB42 Contactor

Siemens Sirius 3RT2018-1BB42 is a compact 3-pole power contactor (size S00) designed for AC-3e/AC-3 switching, rated to 16 A and 7.5 kW at 400 V. It operates from a 24 V DC coil and includes a single normally closed auxiliary contact (1 NC), with screw-terminal connections for secure wiring. The device has an insulation voltage of 690 V and front IP20 protection, and it belongs to the SIRIUS 3RT2 family, optimized for motor control and similar AC-3 loads up to 400 V in light industrial panels. With a mechanical life of 30,000,000 operating cycles and compatibility with 50/60 Hz systems, this 3-pole contactor provides durable, repeatable switching for small motors and other controlled loads.