Siemens SIRIUS 3RT1056-6NP38-0PA5 – Size S6 Power Contactor, 200–277 V Coil
The Siemens SIRIUS 3RT1056-6NP38-0PA5 is a size S6 power contactor with a rated coil voltage of 200–277 V AC, terminated via screw-type terminals on the magnet coil. It measures 172 mm high, 120 mm wide, and 170 mm deep, and mounts by screw fixing on a vertical surface with ±90° rotation and ±22.5° tilt allowed. The contactor is rated for operating temperatures from –25 °C to +60 °C and storage from –55 °C to +80 °C.
Switching Capability and Duty Cycles
Maximum switching frequency varies by duty: 800 operations per hour under AC-1 (resistive), 750/h under AC-3 (squirrel-cage motor starting), 300/h under AC-2 (slip-ring motor), and 130/h under AC-4 (plugging/inching). Coil pick-up and drop-out times are 80–90 ms for both AC and DC supplies, with an arcing time of 10–15 ms.
Termination and Wiring
The main power circuit accepts stranded conductors from 25 to 120 mm²; the auxiliary/control circuit accepts solid or stranded wires in two sizes per terminal: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), or max 2x (0.75–4 mm²). An auxiliary switch is included, and the contactor has a mechanical service life of 10 million operations typical.
Lifecycle and Sourcing
This is a current-production part, sourced and quoted to order against an RFQ through independent distribution channels.