What it is and where it lands
The Siemens SIRIUS 3RT1054-2NP36 is a power contactor in the S6 frame size, designed for switching motor loads and resistive loads in industrial control panels. It is a current-production part within the SIRIUS family, built for screw-fixing onto a vertical mounting surface with ±90° rotatability and ±22.5° tilt front-to-back, so it adapts to enclosure layouts where panel space is tight.
Key ratings and what they mean for your circuit
The coil accepts 200–277 VAC, a standard range for 240 VAC control circuits across Europe and North America. The contactor carries auxiliary switches (yes, built-in), so you can wire feedback or interlock without an add-on block for basic applications. Switching frequency varies by duty: up to 1 000 cycles/hour in AC-3 (motor starting) and AC-3e, 800 in AC-1 (resistive), 400 in AC-2 (slip-ring motor), and 130 in AC-4 (plugging/inching). That AC-4 figure matters if the contactor sees frequent reversing or jogging — it governs thermal rise in the arc chamber.
Wiring and integration
Main power terminals accept stranded wire from 25 to 120 mm² — sized for the S6 frame's current range. Auxiliary/coil terminals use spring-type connections accepting 2x (0.25–2.5 mm²) solid or stranded. Mounting is screw-fix only (no DIN-rail clip on this variant), with a single 9 mm hole per fixing point. Clearance requirements: 10 mm upwards, 10 mm downwards, 20 mm forwards, 10 mm at the side. Operating temperature spans –25 to +60 °C; storage range –55 to +80 °C.