Siemens 3RT1036-1AL00 SIRIUS Power Contactor — Field Integration Note
It carries a 22 kW rating at AC-2 duty at 400 V and a 41 A rating at AC-4 duty at 400 V — the AC-2 figure governs standard slip-ring motor starting, while the AC-4 rating covers reversing and inching applications where the contactor makes and breaks stalled rotor current.
Switching Frequency and Thermal Limits
Maximum switching rates are duty-dependent: 1 000 cycles per hour at AC-1 (resistive), 800 at AC-3 (normal motor start), 400 at AC-2, and 300 at AC-4.
Main current circuit connections use screw-type terminals. Solid conductors accepted: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded conductors: 2x (0.75 to 25 mm²) for the main circuit, and solid or stranded 2x (0.75 to 16 mm²) for auxiliary circuits. The 55 mm width and 112 mm height fit the standard S2 footprint; depth is 115 mm including the arc chamber. Coil operating range at 50 Hz is 0.8 to 1.1 times rated voltage, with pick-up time of 7 to 20 ms at AC.