Siemens 3RT1016-2BB41 Three-Phase AC Contactor

Siemens 3RT1016-2BB41 is a compact Sirius power contactor designed to switch three‑phase motors in industrial control panels. It has three main normally open contacts (3‑pole) and one normally open auxiliary contact, all energized by a 24 V DC coil for control circuits. Rated AC‑3, it handles up to 4 kW at 400 V with a nominal main current of 9 A, making it suitable for motor loads in automation environments. The unit belongs to the S00 size family and uses spring‑type terminals (CAGE CLAMP compatible) for secure, quick wiring. Front IP20 protection supports enclosure mounting, and Siemens cites a high mechanical life, typically up to 30,000,000 switching cycles under standard conditions. This model is commonly used to start and stop three‑phase motors in applications such as conveyors, pumps, and fans, where a compact, 24 VDC coil contactor with an integrated auxiliary contact provides reliable control and straightforward feedback signals for automation systems.