What it is and where it fits
The Siemens 3RT1017-2VB41 is a SIRIUS-branded power contactor in the S00 frame size, designed for switching motor loads in control panels. It mounts on a 35 mm DIN rail per EN 50022 via screw or snap-on, and the main power circuit uses spring-loaded terminals — no screwdriver needed for the power wiring.
Key ratings and what they mean for your BOM
Rated for 5.5 kW at 400 V AC-3 (the standard motor-switching duty class), this contactor handles typical three-phase induction motors up to that power. The 24 VDC coil draws 1.4 W holding power and includes a built-in diode surge suppressor — no external flyback diode needed on the control side. For short-circuit protection with type 2 coordination (minimal damage to the contactor), use a gL/gG fuse rated 20 A. The operating temperature range is -25 to +60 °C, and the front face carries IP20 protection — suitable for enclosed panel mounting, not washdown areas.