Integrator's note on the 3RT1036-1BD44
It carries a 30 kW motor rating at 500 V in AC-3 duty, with a mechanical life of 10 million operations typical.
At 400 V AC-3 the contactor is rated for 22 kW, and at 690 V it drops to 11.4 kW, reflecting the current derate at higher voltage. The AC-4 rating of 41 A at 400 V covers inching and plugging duty where the contactor makes and breaks stalled-rotor current; the maximum mechanical switching rate of 800 operations per hour in AC-3 sets the thermal cycle limit for repetitive conveyor or pump starts. The coil circuit is rated for 24 V DC at 10 A, 60 V DC at 2 A, 110 V DC at 1 A, and 220 V DC at 0.3 A — these are the contact ratings for the auxiliary contacts, not the main poles.
Side-by-side mounting is permitted, so multiple contactors can be ganged without spacing gaps — useful for compact motor control centers. The screw-type terminals accept solid conductors up to 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) for control wiring, and stranded conductors up to 2x (0.75 to 25 mm²) for the main circuit. At 40 °C ambient, the minimum permissible cross-section is 16 mm² for the main power path.