It uses screw-type terminals and is rated for 10 A at 24 V, with a contact reliability of one incorrect switching operation per 100 million operations at 17 V, 5 mA.
This part is a phased-out product. The manufacturer lists the successor as the SIRIUS 3RH2 series. For a BOM line that was specified around the 3RH1911-1FA31-ZX95, the 3RH2 is the official drop-in replacement path — but the physical footprint and terminal layout differ, so a panel re-qualification is needed before swapping.
The 10 A maximum at 24 V is the thermal current rating (Ith) for the auxiliary contacts. The real-world switching capacity depends on voltage and load type: at 110 V it's rated 1 A, at 230 V it's 6 A, and at 400 V it drops to 3 A. For DC switching, the ratings are 6 A at 24 V, 2 A at 60 V, and 0.3 A at 220 V. These numbers govern whether the block can handle your specific pilot device or PLC input load — overshoot the voltage-specific rating and the contacts may weld or fail early.
Rated for 10 million mechanical switching cycles typical. These specs mean the block is suited for industrial control panels in normal factory environments — not for outdoor or wet locations without additional enclosure protection.
Panel integration
Snap-on mounting onto size S00 contactors — no tools needed for attachment. Dimensions are 36.5 mm wide, 37.5 mm high, 41.5 mm deep. Wiring accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20 to 16) and 2x (18 to 14) AWG. The screw terminals are standard for panel wiring; no special termination tools required.