SIRIUS S00 power contactor, 24 V DC coil — what fits and what doesn't
The Siemens 3RT1017-2HB41 is a SIRIUS power contactor in the compact S00 frame, built to switch motor loads in control panels and industrial machinery. Its 24 V DC coil draws 2.3 W to close and holds at the same 2.3 W — a steady-state power figure that matters for DC supply sizing and heat buildup inside a sealed enclosure. Rated for AC-2 duty at 5.5 kW on a 400 V three-phase line, this contactor handles wound-rotor motors and other moderate-switching loads. The spring-loaded terminals on the main circuit accept 2x (0.25 to 2.5 mm²) solid or stranded wire — no screwdriver needed for terminations, which speeds up panel wiring and reduces torque-verification steps.
Mounting and integration
Mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. The 45 mm width fits standard enclosure rail spacing; side-by-side mounting is allowed with 6 mm clearance at the side for heat dissipation. IP20 on the front and terminals means it's protected against finger contact but not washdown — keep it inside a rated enclosure.
Coil and auxiliary contact ratings
The 24 V DC coil has a closing power and holding power both rated at 2.3 W. That flat power curve simplifies the DC supply budget — no inrush spike to design around. One instantaneous auxiliary contact is built in (NO/NC configuration not specified in the base data).