S3 frame power contactor — key fit specs
The 3RT2046-1AK64-3MA0: Its footprint is 195 mm deep, 70 mm wide, and 140 mm high, so it occupies one S3 slot on a DIN rail. Mounting is screw-and-snap-on onto 35 mm DIN rail per EN 60715. Wire termination: main contacts accept solid 2.5–16 mm² or stranded 6–70 mm². Coil connections are screw-type terminals; auxiliary switch is included on the contactor. Switching rates: 850 cycles/hour in AC-3 motor duty, 900 1/h in AC-1 resistive, and 250 1/h in AC-4. Mechanical life is rated at 10 million operations typical.