Siemens 3RT2016-1BB41 Auxiliary Contactor

Siemens SIRIUS 3RT2016-1BB41 is a compact 3-pole power contactor (S00 frame) with a 24 V DC coil and a single normally-open auxiliary contact, designed for AC-3e/AC-3 duty. The main circuit is rated for 9 A and up to 4 kW at 400 V, enabling reliable switching of small motors and other inductive loads. The unit provides three main contacts plus one NO auxiliary contact, both of which are wired via screw terminals for straightforward installation in control cabinets and on-machine panels. As part of the Siemens SIRIUS 3RT family, it is sized for panel mounting in the S00 frame and is commonly used to start and run small motors, drive conveyors, pumps, and other automation tasks where a compact DC-coiled contactor with a built-in auxiliary signal is advantageous. The 24 V DC coil simplifies integration with standard PLC control circuits, and the single auxiliary contact supports simple feedback or interlock logic without requiring additional relay modules.