Its AC-2 rating of 37 kW at 400 V means it handles slip-ring motor duty cycles reliably, while the AC-4 rating of 66 A at 400 V covers reversing and inching applications where the contactor makes and breaks full motor current.
The screw-type terminals on the main current circuit accept solid conductors from 0.5 mm² up to 4 mm² (double ferruled) and stranded conductors up to 50 mm², covering most motor feeder sizes through the S3 frame.
Arcing time runs 10 to 15 ms, dropout time at DC is 14 to 20 ms. Maximum switching rates vary by duty: 900 cycles/hour at AC-1, 400 at AC-2, 1,000 at AC-3, and 300 at AC-4. The coil pickup and dropout thresholds are 0.8 x Uc and 1.1 x Uc respectively.