The Siemens 3RT1016-1BB44-0AA1-ZW95 is a 3-pole SIRIUS contactor rated for AC-3 duty at 4 kW / 400 V, with a 24 V DC coil. It carries two normally-open and two normally-closed auxiliary contacts (2S + 2OE).
AC-3 rating and motor switching
For a 4-pole motor at 400 V, that covers a typical 8 A motor full-load current. The 24 V DC coil pulls in cleanly from a standard PLC digital output or relay, with the integrated varistor suppressing the back-EMF spike on coil dropout.
Auxiliary contacts and mounting
The 2S + 2OE auxiliary contact block is built into the S00 frame — no separate add-on module needed for basic feedback or interlocking. Screw terminals accept 0.5–2.5 mm² conductors.