The 3RH1911-1HA22-ZW98 is a phased-out product. The official successor is the SIRIUS 3RH2 series.
This auxiliary switch block carries a maximum contact rating of 10 A, but the real-world switching capacity depends on the voltage and duty. At 24 V it handles 6 A; at 230 V it also rates 6 A; at 400 V it drops to 3 A. The AC-15 rating at 690 V is 1 A — that's the inductive load curve for contactor coils and solenoid valves at higher line voltages. For DC switching, the 24 V rated value is 10 A, falling to 0.26 A at 600 V. The mechanical service life is 10,000,000 switching cycles typical, with contact reliability of 1 faulty switching per 100 million at 17 V, 1 mA — a solid figure for low-level signal circuits. The block snaps onto SIRIUS contactors and contactor relays (size S00) via the standard EN 50012 profile. Screw-type terminals accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) with core-end processing, or 2x (20... 16) and 2x (18... 14) AWG. Front protection is IP20, so it's suited for enclosed panels where no washdown or dust ingress reaches the terminals.
Integration into a SIRIUS contactor assembly
Snap-on mounting onto the contactor front face — no tools, no DIN rail. The 36.5 mm width and 41.5 mm depth keep the assembly within the S00 footprint.
The SIRIUS 3RH1 series carries CE marking and is designed to IEC/EN 60947-5-1. RoHS and REACH compliance documentation is available from Siemens on request.