This is a Siemens SIRIUS auxiliary contactor, order code 3RH1131-1AP00-0TK1, built in the Size S00 frame. It gives you three normally-open and one normally-closed instantaneous contacts, with no leading, lagging, or delayed switching — straight mechanical mirroring of the main contactor's coil state.
The contact ratings tell you exactly what load this block can handle at different voltages. At 24 V it's rated 10 A — that's your control-circuit workhorse for PLC outputs or relay coils. At 230 V it's 6 A, at 400 V it's 3 A, and at 690 V it drops to 1 A. The 6 kV surge voltage resistance (rated value) means it can ride out transients on industrial lines without welding contacts. That covers most indoor panel environments short of a freezer or a rooftop in Arizona. Shock resistance is 10g for 5 ms and 5g for 10 ms — tough enough for a motor starter cabinet on a vibrating conveyor.
Wiring and Terminal Details
The solid terminals accept a range of conductor sizes: two wires of 0.5 to 1.5 mm², two of 0.75 to 2.5 mm², or a single 4 mm². That covers most control wiring you'd run in a panel — no need for ferrules on solid wire, but stranded will want them for a clean connection.