The Siemens SIRIUS 3SK1213-2AJ20 is a safety relay output expansion module — it adds relay enabling circuits to an existing safety relay, extending the number of load circuits you can switch in a safety-related application. It's designed for use in safety circuits per IEC 60947-5-1 and IEC 61000 for EMC, and carries a total current maximum of 30 A across its outputs. The module switches loads at 24 V, 115 V, or 230 V AC/DC, each rated for 10 A — so it handles contactors, valves, or signal lamps in a safety loop without needing a separate interposing relay.
Connections are push-in spring terminals (spring-loaded), accepting solid or stranded wire: 1x (20…16 AWG) or 2x (20…16 AWG), and with ferrule 1x (0.5…1.5 mm²) or 2x (0.5…1.5 mm²). Strip length is standard for push-in; no screwdriver needed for the power side.
Environment and approvals
Pollution degree 3, overvoltage category 3. Shock resistance 5 g / 10 ms. UL approved — the UL mark is listed directly on the module, so it passes a North American panel inspection without a separate UL report chase.