The Siemens SIRIUS 3RT1336-1AP00-4AA0 is a size S2 power contactor rated for motor switching at 22 kW at 400 V AC-2 duty and 41 A at 400 V AC-4, with an insulation voltage of 690 V. The operating temperature range is -25 to +60 °C, storage -55 to +80 °C, and pollution degree 3 applies.
The 73 mm width and 112 mm height fit standard S2 contactor spacing on a DIN rail. Screw terminals accept solid conductors up to 2x 4 mm² (max) or stranded up to 2x 25 mm², with a minimum solid of 0.5 mm² — suitable for control wiring and power tails in a panel.
The AC-2 rating at 400 V (22 kW) covers slip-ring motor starting and reversing duty, while the AC-4 rating (41 A at 400 V) handles plugging and inching — the higher current reflects the more severe switching cycle. For resistive loads at AC-1, the maximum switching rate is 1 000 operations per hour.