Siemens 3RT1016-1BB42 Contactor With Contact Block

Siemens 3RT1016-1BB42 is a three-pole Sirius contactor rated for AC-3 motor control up to 4 kW at 400 V, energized by a 24 V DC coil and featuring three normally open main contacts capable of about 9 A. The kit includes a 3RH1911-1FA22 auxiliary contact block, which provides two normally open and two normally closed auxiliary contacts for feedback, interlocking, or control signaling in automation circuits. This combination is commonly used to start and stop three-phase motors and other AC loads in industrial panels, with the auxiliary block enabling status indication and circuit interlocks in low-voltage control schemes. The 3RT1016-1BB42/3RH1911-1FA22 assembly is part of Siemens’ Sirius 3RT line, offering a compact, rugged switching solution designed for straightforward wiring in standard control architectures.