Phoenix Contact 1607748 The contact insert is designed for use with articles featuring a VC3 design and light gray color, available in five different positions, each with a minimum conductor cross section of 0.5 mm2 and a maximum of 16 mm2. It has a rated voltage of 690 volts and can handle up to 70 amps of current, using a screw connection and pin-type contact arrangement that must be connected or disconnected when the article is under no load.