What this contactor is and what it does
The Siemens 3RT1017-1AN61 is a SIRIUS 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, using screw and snap-on mounting, and its 45 mm width fits standard panel layouts. The contactor is rated for AC-2 duty at 5.5 kW at 400 V, meaning it handles slip-ring motor starting and reversing, and also carries an AC-4 rating of 8.5 A at 400 V for plugging and inching of squirrel-cage motors. The 24 VDC coil draws 10 A at rated value, so the control transformer or power supply must be sized for that inrush.
Key ratings and what they mean for fit
The AC-2 rating at 400 V is 5.5 kW — that governs continuous motor switching for wound-rotor or slip-ring motors. The AC-4 rating at 400 V is 8.5 A, which is the figure to check for high-frequency reversing or inching duty where the contactor makes and breaks full load current. For type 2 coordination, the required upstream fuse is a gL/gG 20 A; for type 1 coordination, a 35 A gL/gG fuse is specified. Mechanical life is typical 30 million operations, so this contactor is built for high-cycle applications like conveyor or pump panels.
Mounting and environmental constraints
The contactor is 72 mm deep, 45 mm wide, and 57.5 mm tall, so it occupies one standard 45 mm DIN-rail slot. Side-by-side mounting is permitted without derating, with a 6 mm clearance required at the side. The operating temperature range is -25 to +60 °C, and pollution degree 3 means it tolerates conductive pollution in industrial environments. The front and terminal protection rating is IP20, so it is suitable for enclosed panel installation only — not for washdown or outdoor exposure. Maximum operating altitude is 2 000 m.