The Siemens 3RT1517-1AD00 is a SIRIUS-brand power contactor in the compact Size S00 frame — 45 mm wide, 57.5 mm tall, and 72 mm deep. The 24 VDC coil draws 4.4 VA at 50 Hz and pulls in with a 10 A rated current for the main contacts. Screw-type terminals on both main and auxiliary circuits accept solid or stranded wire from 0.5 mm² up to 4 mm² (AWG 20 to 12), with dual-wire entry for paralleled feeds.
The 10 A rated current at 24 V DC is the continuous carry rating for the main power path — sized for small motor loads, resistive heaters, or solenoid banks within that current envelope. For DC switching at higher voltages, the ratings drop (2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V) — keep that curve in mind if you're switching DC loads above 24 V.
The screw and snap-on fastening means you can pre-wire the contactor on the bench and clip it onto the rail during panel assembly. Wire range on the main contacts accepts up to 4 mm² stranded or 12 AWG solid, with dual-wire entry for looping through.