SIRIUS S12 Contactor, 110 VDC Coil
The Siemens SIRIUS 3RT1476-6XF46-0LA2 is a size S12 contactor with a 110 VDC coil, designed for heavy motor switching and resistive loads in industrial control panels. It carries a rated operational current of 192 A at 600 V and 180 A at 480 V, so it handles high-current three-phase motors up to that range without requiring a parallel contactor.
Dimensions and Mounting
The contactor measures 214 mm high, 160 mm wide, and 225 mm deep — a substantial frame that needs generous enclosure space and proper gland-plate planning. It mounts via screw fixing (M11 holes) and accepts a vertical mounting surface with ±90° rotation and ±22.5° tilt front-to-back, giving panel builders flexibility in tight layouts. Minimum clearance distances around the contactor are 10 mm upwards, 10 mm downwards, 10 mm at the side, and 20 mm forwards — essential for arc flash containment and heat dissipation during the 10–15 ms arcing time.
Coil and Auxiliary Details
The DC coil operates at 110 V rated value with a pickup/dropout ratio of 0.7 (initial value), meaning it holds in reliably down to about 77 V. The contactor includes an auxiliary switch, so you get a feedback signal without adding a separate block — saves a DIN rail slot and one wiring step. Solid conductor connections accept 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), and max 2x (0.75–4 mm²) — standard panel wire sizes, no special ferrules needed for the smaller gauges.
Operating Conditions and Life
Rated for operation from -40 to +70 °C and storage from -55 to +80 °C, so it handles both cold warehouses and warm cabinet interiors. Mechanical service life is typical 10 million operations — a solid figure for high-cycle conveyor or pump applications. Switching frequency reaches 600 operations/hour at AC-1 and 250 at DC-1. The lifecycle stage is current, meaning Siemens still actively produces this part. For volume procurement, it is quoted to order against an RFQ through independent distribution — availability and current pricing are confirmed at quote time.