Vacuum relays are especially well suited in radar applications for pulse forming networks with pulse lengths from 1ms to 10 ms (Fig. 13). These applications require a relay to withstand the pulse forming network voltage on a repetitive basis usually from 100 to 500 pulses per second. Higher peak currents can be used in this type of service due to the low duty cycle and short pulse duration. Average energy dissipated in the relay is low, heating minimal, and consequently voltages up to peak ratings and peak currents to 1000 Amps and be utilized.