The Siemens SIRIUS 3RT1015-2AD02 is a size S00 power contactor rated for 10 A at 24 V DC (AC-12 duty) and capable of switching motor loads up to 3.5 kW at 500 V or 4 kW at 690 V. The 24 V DC coil is the control voltage you need to plan for in your panel design — it pulls in cleanly across the full tolerance band of 0.8 to 1.1 times rated voltage at 50/60 Hz.
Side-by-side mounting is permitted — no derating gap required for adjacent units, though you should verify the 6 mm side clearance for wiring access. Main circuit connections use spring-loaded terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded conductors, or 2x (24 to 14 AWG). The IP20 finger-safe enclosure on the front and terminals means it's suitable for standard control panel environments without additional shrouding.
For motor duty, the AC-2 rating at 400 V is 3 kW, and the AC-4 rating (reversing/inching duty) at 400 V is 6.5 A. The short-circuit protection coordination requires a gL/gG fuse: 20 A for Type 2 coordination, 35 A for Type 1. The mechanical endurance is 30 million operations typical — a figure that assumes proper coil suppression and within-spec switching loads.