The Siemens 3RH1122-1AV00 is a SIRIUS auxiliary contactor in size S00 — a compact 45 mm wide block that adds two normally-open (NO) instantaneous contacts to a contactor or motor starter assembly.
Rated switching — what the numbers mean
The contact ratings are given per voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. The 400 V rating matches the rated voltage of the coil (400 V AC at both 50 and 60 Hz).
The unit accepts solid conductors: two wires of 0.5 to 1.5 mm², two of 0.75 to 2.5 mm², or a single 4 mm² per terminal. Shock resistance is 10g for 5 ms and 5g for 10 ms — fine for normal industrial vibration but not rated for heavy impact near presses or hammers.