Phoenix Contact 1607383 A contact insert set suitable for a range of applications is available with a design code of VC4 and consists of 30 positions. The minimum conductor cross-sectional area allowed is 0.14 mm2 while the maximum is 1.5 mm2, and it is rated to handle voltages up to 250 volts and currents of up to 10 amps. This contact insert features a pin connection type, and connectors should only be connected or disconnected when there is no load applied.