Siemens' Sirius 3RT2018-2BB41 is a compact 3-pole power contactor (size S00) for AC-3e/AC-3 duty, rated up to 16 A and 7.5 kW at 400 V with a 24 V DC coil and spring-loaded terminals. It includes one normally open auxiliary contact and weighs 0.313 kg; its datasheet lists 690 V insulation voltage and front IP20 protection, with an operating temperature range of -25 to +60 C (storage -55 to +80 C). The 3RH2911-2HA31 auxiliary contact block is designed for front mounting on 3RT2 contactors such as the 3RT2018-2BB41, offering 3 NO + 1 NC contacts for signaling and interlocking in control circuits.
