SIRIUS Size S10 — what the frame rating means for your panel
The 3RT1466-6AD36 is a Siemens SIRIUS Size S10 contactor — the S10 frame is the largest standard size in the SIRIUS modular contactor range, sized for high-current motor switching and heavy industrial loads up to the full rating of the frame. The Size S10 designation tells you the physical envelope and the maximum thermal continuous current the contactor can handle; it governs the main power lug capacity, which on this unit accepts stranded conductors from 70 mm² up to 240 mm², so it is built for feeders and large motor branch circuits, not small panel auxiliaries. Mounting is screw fixing with a vertical mounting surface — the contactor can be rotated ±90° and tilted ±22.5° front-to-back, which gives flexibility in tight enclosures or when aligning with busbar systems. The 210 mm height, 145 mm width, and 202 mm depth mean it occupies a full-size footprint; plan for a 10 mm clearance above and below and 20 mm forward clearance for arc-chamber venting (arcing time is 10-15 ms). The coil is rated 42-48 V AC/DC with pickup at 80% of rated value and dropout below the hold threshold — operate time is 40-80 ms on both AC and DC, consistent for sequencing interlocking.
Coil and auxiliary circuit — what the 42-48 V AC/DC rating drives
The coil is screw-type terminals, accepting solid or stranded wire: 2x 0.5-1.5 mm², 2x 0.75-2.5 mm², or max 2x 0.75-4 mm². That is a standard control-circuit termination — compatible with most PLC digital outputs and relay interposing panels. The 42-48 V AC/DC coil voltage is common in industrial control systems using 48 V DC control buses or 42 V AC derived from control transformers; verify your control supply matches before wiring. The contactor ships with an auxiliary switch block (4 contacts attachable). The auxiliary contacts are rated: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 6 A at 230 V — the ratings drop with voltage due to arc extinction limits. For a 24 V DC PLC input circuit, the 10 A rating gives generous headroom for multiple feedback signals.