What it is and what it does
The Siemens SIRIUS 3RT1016-1AP02-ZW95 is a size S00 power contactor rated for switching motor loads. It carries 4 kW at AC-3 / 400 V and 4 kW at AC-2 / 400 V, with an AC-4 rated operating current of 8.5 A at 400 V. The coil is AC-operated, with a pick-up apparent power of 27 V·A and a holding power of 4.4 V·A.
Key ratings and what they mean for fit
The AC-3 rating of 4 kW at 400 V is the motor-switching duty that governs most conveyor, pump, and fan applications. AC-2 at 400 V also rates 4 kW, covering slip-ring motor starting. The AC-4 rating of 8.5 A at 400 V handles reversing or inching duty where the contactor makes and breaks stalled-rotor current. For resistive or lightly inductive loads, the AC-12 maximum operating current is 10 A. The contactor is rated for a mechanical life of 30,000,000 switching cycles, and auxiliary contact reliability is specified at one faulty switching per 100 million operations at 17 V, 1 mA. The ambient temperature range is -25 to +60 °C during operation. Pollution degree 3 means it is suited for industrial environments with conductive pollution. The enclosure offers IP20 on the front and at the terminals, so it requires installation within a panel or enclosure.
Panel integration and coordination
The contactor measures 45 mm wide, 57.5 mm high, and 72 mm deep. Side-by-side mounting is permitted, with a 6 mm clearance required at the side. It accepts screw and snap-on mounting on a 35 mm DIN rail. For short-circuit coordination, type 1 coordination requires a 35 A gL/gG fuse, while type 2 coordination requires a 20 A gL/gG fuse. This determines the upstream protection needed for the branch circuit.