Lifecycle and sourcing reality
The 3RH1911-1HA22-ZW98 is a phased-out product. The official successor is the SIRIUS 3RH2 series. For a BOM line that needs this exact order code, sourcing runs through independent distribution — quoted to order against an RFQ, with availability and current pricing confirmed at quote time.
What the ratings mean for fit
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. Surge voltage resistance is 6 kV, and insulation voltage is 690 V at pollution degree 3, so it holds up in standard 400 V panels with some margin.
Compliance and documentation
The SIRIUS 3RH1 series carries CE marking and is designed to IEC/EN 60947-5-1. The insulation voltage of 690 V at pollution degree 3 and surge voltage resistance of 6 kV align with typical industrial control panel requirements. RoHS and REACH compliance documentation is available from Siemens on request.