This contactor carries no auxiliary switch block — it is a bare main contactor. If your circuit needs auxiliary contacts for status feedback or interlocking, you will add a separate block (Siemens 3RT29 series). Rated operational current at AC-3 (motor switching) is not directly listed in the excerpt, but the frame size S0 typically covers the 9–38 A range at 400 V. The 45 mm width confirms it is the smaller S0 variant, not the S2 or S3. Switching frequency: 1000 cycles/hour at AC-1, AC-2, AC-3, and AC-3e; drops to 300 cycles/hour at AC-4 (plugging/inching duty). That derating matters if your application does frequent reversing or jogging.
Depth is 141 mm — check enclosure depth if using a shallow gland plate. Wire range: solid or stranded 1 to 10 mm² for main conductors. Arcing time is 4 to 16 ms at AC — ensure arc chute clearance per Siemens mounting guidelines.