Siemens 3RT2016-1BB42 Three-Phase AC Contactor

Siemens 3RT2016-1BB42 is a compact S00-sized three-pole power contactor designed for AC-3e/AC-3 duty, capable of switching a 4 kW load at 400 V with a 9 A main current rating. It is coil-driven by a 24 V DC control circuit and includes a single normally closed auxiliary contact for signaling or interlocking. Wiring uses screw terminals, and the unit features a 690 V insulation rating with IP20 front protection, suitable for standard control panels. This contactor is well suited for motor-starting and control of small-to-medium inductive loads—such as conveyors, pumps, and machine tools—in light- to mid-duty automation applications. Its 3-pole main circuit and compact form factor simplify wiring and space planning in compact control cabinets, while Siemens branding ensures compatibility with other SIRIUS 3RT components and common control-system architectures.