Maximum Electrical Switching Frequency: (AC-1) 600 cycles per hour (AC-15) 1200 cycles per hour (AC-2 / AC-4) 300 cycles per hour (AC-3) 1200 cycles per hour (DC-13) 900 cycles per hour. Rated Short-time Withstand Current Low Voltage (I cw): at 40 ☌ Ambient Temp, in Free Air, from a Cold State 10 s 150 A at 40 ☌ Ambient Temp, in Free Air, from a Cold State 15 min 35 A at 40 ☌ Ambient Temp, in Free Air, from a Cold State 1 min 60 A at 40 ☌ Ambient Temp, in Free Air, from a Cold State 1 s 300 A at 40 ☌ Ambient Temp, in Free Air, from a Cold State 30 s 80 A for 0.1 s 140 A for 1 s 100 A. to IEC 6, Open Contactors q = 40 ☌ 35 A acc. 
Conventional Free-air Thermal Current (I th): acc.Rated Frequency (f): Auxiliary Circuit 50 / 60 Hz Main Circuit 50 / 60 Hz.Rated Operational Voltage: Auxiliary Circuit 690 V Main Circuit 690 V.
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