The S10 footprint is the largest in the SIRIUS contactor range, so this is a high-power part, not a panel-filler.
Coil is rated 23-26 VDC, screw-type terminals — that's a tight tolerance, so verify your control supply is regulated within that band; a 24 V nominal bus that sags below 23 V at pickup won't hold this contactor in. The auxiliary switch is built in, rated 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V — those are the contact ratings for the aux, not the main poles, so don't plan to switch motor current through them. Mechanical endurance is 10 million cycles typical — that's the life of the mechanism, not the electrical contacts under load. For the main contacts, switching frequency depends on duty: 800 operations/hour at AC-1 (resistive), 750/h at AC-3 (squirrel-cage motors), 300/h at AC-2 (slip-ring motors), and 250/h at AC-4 (plugging/inching). If your application cycles faster than these limits, the vacuum bottle life drops fast. Stranded power wiring accepts 70-240 mm² — that's a heavy cable range, consistent with the S10 frame size. Control wiring (coil and aux) uses screw terminals accepting 2x 0.5-1.5 mm² solid or 2x 0.75-2.5 mm² stranded, max 2x 4 mm². Mounting is screw-fixing, not DIN rail, so plan for drilled panel holes at 11 mm diameter.