Contactor, Application: Contactors for Motors, Complete devices up to 170 A, Utilization category: AC-1: Non-inductive or slightly inductive loads, resistance furnaces, NAC-3: Normal AC induction motors: starting, switch off during running, AC-4: Normal AC induction motors: starting, plugging, reversing, inching, Connection technique: Screw terminals, Notes: Also suitable for motors with efficiency class IE3, Rated operational current AC-3 380 V 400 V: Ie= 18 A, Rated operational current AC-1 Conventional free air thermal current, 3 pole, 50 – 60 Hz Open at 40 °C: Ith =Ie= 40 A, enclosed: Ith= 32 A, Rated operational current AC-1 Conventional free air thermal current, 1 pole open: Ith= 88 A, enclosed: Ith= 80 A, Max. rating for three-phase motors, 50 – 60 Hz AC-3 220 V 230 V: P= 5 kW, 380 V 400 V: P= 7.5 kW, 660 V 690 V: P= 11 kW, Max. rating for three-phase motors, 50 – 60 Hz AC-4 220 V 230 V: P= 2.5 kW, 380 V 400 V: P= 4.5 kW, 660 V 690 V: P= 6.5 kW, Contacts N/O = Normally open: 3 N/O, Contacts N/C = Normally closed: 2 NC, Instructions: Contacts to EN 50?012., integrated suppressor circuit in actuating electronics, with mirror contact., Voltage AC/DC: DC operation