What this SIRIUS contactor is and where it fits
The Siemens 3RT1026-3XG28-0MV0-ZX95 is a SIRIUS power contactor in the S0 frame size, designed for switching motor loads in industrial control panels. It mounts on a 35 mm DIN rail per EN 50022, with a 45 mm width that takes up three standard module slots — important when you're laying out a dense panel. Screw terminals on the main circuit accept up to 2x 10 mm² or a single 10 AWG, so it'll handle the wire sizes you typically run for a 11 kW motor at 400 V.
Ratings that matter for motor switching
AC-2 duty at 400 V gives you 11 kW — that's the rating for slip-ring motors or wound-rotor applications where the contactor makes and breaks under load. AC-4 at 400 V is 15.5 A, covering reversing or inching duty where you're switching stalled rotor currents. The mechanical life is 10 million operations typical, which out on the route means this contactor will likely outlast the motor it's driving before the contacts wear.
Built-in surge suppression and aux contacts
This variant comes with an integrated RC surge suppressor across the coil — no separate suppressor module to buy and mount. The two instantaneous auxiliary contacts handle 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, which is enough to signal a PLC input or drop out a holding circuit. Operating temperature spans -25 to +60 °C, so it'll sit in a warm panel next to a drive without derating.
What approvals and documentation to expect
This contactor carries the usual SIRIUS compliance suite: IEC/EN 60947-4-1 for contactors and motor starters, UL/CSA pending the specific variant suffix. The RC suppressor means it meets EMC emission limits without external filtering. Declaration of conformity and RoHS/REACH documentation are available from the manufacturer's support portal.