The main power circuit accepts stranded conductors from 25 to 120 mm², while the auxiliary circuit handles solid or stranded wire from 0.5 to 4 mm² depending on the termination count. Mounting is by screw fixing, with the contactor sized at 172 mm high, 120 mm wide, and 170 mm deep.
The S6 frame size indicates a contactor rated for higher motor currents typical of medium-to-large induction motors in the 30-75 kW range on 400 VAC three-phase, though the exact AC-3 rating is not listed here. The switching frequency varies by duty: up to 800 operations per hour in AC-1 resistive duty, 750 ops/h in AC-3 motor starting, and 130 ops/h in AC-4 plugging/reversing. Operating time is 40-60 ms on both AC and DC coil supplies, with an arcing time of 10-15 ms. The auxiliary switch (built-in) carries 10 A at 24 V, 2 A at 48 V or 60 V, and 1 A at 110 V. These are the ratings for the auxiliary contacts feeding PLC inputs or status lamps — stay within these limits to avoid contact welding. In a non-ventilated panel near a drive or transformer, the upper ambient limit of 60 °C is the binding constraint — derate switching frequency above 40 °C per the thermal curve.
The closest peer is the 3RT1056-6AP36-0UA0, which shares the S6 frame but differs in coil voltage or auxiliary configuration. The -6AP38-0PA5 drops in without rewiring the coil circuit if the panel was wired for 220-240 VAC.