The Siemens 3RH1122-2AV60 is a SIRIUS S00-size auxiliary contactor — basically the relay that tells the main contactor when to pull in or drops out a status signal.
Rated 10 A at AC-12 (resistive load at 24 V) and 6 A at AC-15 at 230 V — that's the switching capacity for solenoid valves or contactor coils. At 400 V it's 3 A, at 500 V it's 2 A, and at 690 V it holds 1 A. Pollution degree 3 means it's happy in a typical industrial panel with some dust and humidity, not just a clean control room.
Size S00 footprint: 45 mm wide, 60 mm tall, 73 mm deep. Screw terminals accept 2x 0.25 to 2.5 mm² solid or 24–14 AWG stranded. The front carries IP20 protection — fine inside an enclosure, not for washdown. Shock-rated at 10g for 5 ms and 5g for 10 ms, so it'll survive a forklift bump to the panel.