The Siemens SIRIUS 3RH1924-1GP11 is a coupling link that mounts directly onto the coil of SIRIUS contactors in sizes S0 and S2, providing a mechanical interlock or auxiliary contact interface at 24 V DC. It's a phased-out product, with the official successor being the SIRIUS 3RH2 series — a key fact for any BOM line that needs a long-term supply commitment.
What the ratings mean for fit
The coupling link carries one normally-open (NO) auxiliary contact, rated 1 A at 24 V DC, 0.2 A at 110 V DC, and 0.1 A at 220 V DC. For AC loads, the contact handles 3 A at 230 V. These are the maximum switching currents at those voltages — the actual load in your control circuit must stay within these limits, especially at higher DC voltages where arc extinction is harder. It fits contactor frames S0 and S2 (the SIRIUS compact range up to about 40 A motor full-load current). The coupling link fastens via direct mounting — no DIN rail or additional bracket needed — and can be installed in any orientation. Dimensions are 45 mm wide, 35 mm high, and 50 mm deep, with IP20 protection on the front. The terminals accept two conductors per clamp: 0.5 to 1.5 mm² with core-end processing, or 0.75 to 2.5 mm² solid. Pollution degree 3 rating means it's suitable for industrial environments with conductive dust or occasional condensation.