The Siemens 3RH1122-2AB00-0TK1 is a SIRIUS auxiliary contactor in size S00, carrying 2 normally-open instantaneous contacts. It is designed to switch control signals and auxiliary loads in motor starter and contactor assemblies — the kind of signal-level switching that governs a contactor coil or a PLC input in a panel.
The 2 NO contacts are rated for switching at various control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. The contacts are instantaneous (no make-before-break or delayed action), so they close and open with the main contactor armature. This makes the 3RH1122-2AB00-0TK1 suitable for switching PLC-level DC signals without the contact wetting issues common on standard power contactors. This aligns with requirements for industrial control panels.
RoHS compliance date is noted as July 1, 2006, which aligns with the EU RoHS directive effective date. The product extension for auxiliary switches is marked as Yes, so add-on blocks are available if the 2 NO contacts are insufficient.
Dimensions are 45 mm wide, 60 mm high, and 73 mm deep — the S00 footprint that fits standard contactor/relay spacing on DIN rail. The solid conductor capacity is 2x (0.25 to 2.5 mm²), which covers the common control wiring range from signal-level twisted pair to 14 AWG power-limited circuits. Terminal screws accept both solid and stranded wire within that range. Shock resistance is 10g at 5 ms and 5g at 10 ms — adequate for most industrial machinery but not rated for continuous high-G environments like engine test cells without additional damping.