SIRIUS 3RT1017-1MB41-0KT0 — Size S00 power contactor, 24 VDC coil
The Siemens SIRIUS 3RT1017-1MB41-0KT0 is a Size S00 power contactor with a 24 VDC coil, rated for main current circuits via screw-type terminals. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 50022, fitting a 45 mm wide by 57.5 mm high by 72 mm deep footprint — a standard panel slot for this frame class. The DC coil draws 1.4 W for both closing and holding, so the power supply budget is predictable: no inrush spike beyond the steady-state 1.4 W. Operating temperature range is -25 to +60 °C, with IP20 finger-safe protection on the front and at the terminals — suitable for enclosed panel installation where the enclosure provides the environmental seal.
Switching ratings and what they mean for motor duty
At AC-2 duty (slip-ring motor starting) at 400 V, this contactor is rated for 5.5 kW; at AC-4 duty (plugging, inching) at 400 V, it handles 8.5 A. The AC-12 maximum operating current is 10 A — that's the resistive/control-circuit ceiling. For DC switching, the coil-side ratings are 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. These are the values that govern fit for a given load; the AC-2 figure is the one to size against for standard induction motor duty. Short-circuit coordination is specified: Type 2 coordination requires a 20 A gL/gG fuse; Type 1 coordination allows a 35 A gL/gG fuse. The pollution degree is 3 (conductive pollution, or dry non-conductive that becomes conductive due to condensation), which is typical for industrial control panels.
Termination and wiring
Main circuit terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded conductors. AWG equivalents are 2x (20 to 16), 2x (18 to 14), and 1x 12. The screw terminals are the standard for this Size S00 frame — no spring-cage option on this variant.