SIRIUS auxiliary contactor, size S00 — 2 NO, screw/snap-on
The Siemens 3RH1122-2AF00-0TK0-ZX95 is an auxiliary contactor from the SIRIUS family, size S00, carrying two instantaneous normally-open contacts and no leading, lagging, or delayed switching contacts. It is rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V — those are the AC-15 / DC-13 style switching capacities you'd expect for control-circuit isolation, not power switching. The contact reliability spec — one incorrect switching operation in 100 million at 17 V, 1 mA — tells you this part is built for dry-circuit signal integrity, not just power contacts. That matters when you're switching PLC inputs or relay coils where the load current is low and oxide films don't self-clear.
Mounting and integration — DIN rail or screw, with position flexibility
That gives panel builders room to orient the contactor for wire routing without worrying about derating the switching capacity. Dimensions are 45 mm wide, 60 mm high, 73 mm deep — the S00 footprint fits alongside SIRIUS contactors and overload relays in a compact control panel.
Wiring and conductor compatibility
Solid conductors from 0.25 mm² to 2.5 mm² are accepted. That range covers most control-circuit wiring.
Substance prohibition date is 07/01/2006, aligning with RoHS compliance. Shock resistance is rated at 10 g / 5 ms and 5 g / 10 ms.