The Siemens 3RT7017-1AH02 is a Size S00 contactor with three normally-open main poles, rated for 690 V insulation voltage and 6 kV surge withstand. It ships with screw-type terminals for both main and control circuits — no auxiliary contact block on board, but the product extension slot accepts one. The kit is complete for a basic three-pole switching job: the contactor itself, the terminal hardware, and the DIN-rail clip. No holes in the box for a standard panel build. The 45 mm width and 72 mm depth fit the S00 footprint — three units side-by-side without spacing gaps.
Coil and control circuit — what the DC rating means
The magnet coil draws 0.8 W during closing and holds at 0.27 W DC — a low-hold design that keeps the control transformer or PLC output lightly loaded once the contactor is sealed. The 48 V AC 50/60 Hz coil means this variant is wound for standard control voltages in many European and Asian panels; if your BOM calls for 24 V DC or 230 V AC, this is not the right coil code. Switching frequency is rated at 750 cycles per hour under AC-3 duty and 250 cycles per hour under AC-4 — the AC-4 figure governs frequent plugging or inching applications.
Terminal specs and coordination
Screw terminals accept solid or stranded wire: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) per clamp, with the same range for finely stranded wire with ferrule. For short-circuit coordination, type 1 requires a 35 A gL/gG NH fuse; type 2 requires a 20 A gL/gG NH fuse. The IP20 rating on both front and terminal faces means finger-safe when installed in a closed panel — no touch-hazard exposure during normal operation.