What This Contactor Is
The Siemens SIRIUS 3RT1476-6NP36 is a size S12 contactor with a screw-type coil terminal block and an integrated auxiliary switch. It's built for switching motor loads in industrial control panels, and the S12 frame size puts it in the heavy-current range — the main power circuit handles stranded conductors from 70 to 240 mm². The coil accepts both AC and DC at a rated value of 200 to 277 V, with a pickup dropout response of 80 to 100 ms on either supply type. Out here in the grease, that means it'll handle the big motor feeds on a pump or conveyor without the coil burning up from a mixed-voltage control circuit.
Key Ratings and What They Mean for Fit
The coil's rated voltage range of 200 to 277 V AC/DC is the first thing to verify against your control transformer — it's not a 24 V or 110 V coil, so don't try to swap it into a low-voltage panel without a separate supply. The auxiliary switch is built in, rated at 10 A at 24 V, 6 A at 230 V, and 0.3 A at 220 V; that's enough to signal a PLC input or drive a status lamp on the door. Mechanical life is listed at 10 million operations typical, which is standard for a contactor this size — it'll outlast most of the gear it's switching if the coil voltage stays clean.
Mounting and Wiring
Mounting is by screw fixing — four holes of 11 mm diameter on a vertical surface, with the contactor rotatable +/- 90° or tiltable +/- 22.5° front-to-back. Dimensions are 214 mm high, 160 mm wide, and 225 mm deep.