Siemens 3RT2016-2BB42 Three Phase Contactor Module

Siemens 3RT2016-2BB42 is a compact Sirius three-pole power contactor with a 24 V DC coil, designed for AC-3e/AC-3 motor-control applications. It accepts a mains supply up to 400 V and can switch a main circuit rated at 9 A, with a maximum load capacity of 4 kW at 400 V. The module includes one normally closed auxiliary contact for signaling or interlocking in control circuits and uses spring-loaded terminals for straightforward, reliable wiring. Classified as an S00 size device within the 3RT2 family, the 3RT2016-2BB42 is intended for installation in control panels and automation assemblies where a compact, dependable means to switch three-phase loads is required. The 24 V DC coil is compatible with standard PLC outputs and controller relays, enabling coordinated start/stop sequences while maintaining separation between control and power circuits. This combination of low coil voltage, limited footprint, and integrated auxiliary contact makes it a practical choice for compact motor-control tasks in industrial automation.