The S12 frame carries stranded cable from 70 mm² up to 240 mm², so this is sized for the heavy end of the low-voltage motor circuit, not a small auxiliary relay.
The coil is rated 21 to 27.3 V, which is the standard 24 VDC nominal band with tolerance for a sagging battery or a long cable run. Pickup and dropout times are 80 to 100 ms on both AC and DC supplies, so the contactor responds consistently regardless of control voltage type — useful when the same BOM feeds both AC and DC panels. Switching frequency matters for duty cycle planning: at AC-3 (squirrel-cage motor starting) the maximum is 750 operations per hour; at AC-4 (plugging, inching) it drops to 250 ops/h. If your application needs frequent reversing or jogging, the AC-4 limit is the one that governs contactor life — exceeding it accelerates contact wear despite the vacuum bottle.
Fastening is by screw fixing through an 11 mm hole — not a DIN-rail clip, so panel layout needs a drilled backplate or mounting rail with adapter. The 225 mm depth and 214 mm height mean it occupies significant panel volume — plan the gland plate and busbar routing accordingly.