It provides one normally open (NO) and one normally closed (NC) contact configured per EN 50005, terminated with screw-type terminals. Rated for a maximum of 10 A, with specific current ratings defined across a range of operating voltages — 6 A at 24 V, 6 A at 125 V, 6 A at 230 V, 6 A at 250 V, and 3 A at 400 V, among others — this block handles the auxiliary circuit switching needs of motor starters and control relays.
This part is a phased-out product per the manufacturer. The official successor is the SIRIUS 3RH2 series — a direct replacement that fits the same S00 contactor footprint and wiring scheme. For a BOM line already locked to the 3RH1911 form factor, the 3RH2 auxiliary switch block is the drop-in update; the same snap-on mounting, screw terminal layout, and contact configuration apply.
Snap-on mounting onto the contactor — no tools needed. The block clips directly onto size S00 SIRIUS contactors and contactor relays. Dimensions are compact: 36.5 mm wide, 37.5 mm high, 41.5 mm deep. Screw terminals accept 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²) with ferrule, or 2x (20…16) and 2x (18…14) AWG.
Insulation voltage is rated at 690 V AC with pollution degree 3, and surge voltage resistance is 6 kV — figures that match the typical panel environment for industrial control gear up to 690 V line. Mechanical service life is 10 million switching cycles typical. The multi-unit packaging (600 units per pack) signals this was originally a volume-production item for panel builders.