HV Relays: Hermetically sealed for harsh environments

High voltage relays are electromechanical devices whose purpose is to switch to high voltage signals (> 1kV) and high frequency applications. These relays are heavily insulated and are made of strong materials to increase contact life. High voltage relays are used in many technical devices that require voltages that go up to 10,000 V and currents up to 30 A. Unlike conventional relays, high voltage relay coils are located outside the vacuum and further away from the contacts.

High voltage relays offer low and stable contact resistance over the part life cycle. High voltage relays offer low and stable contact resistance over the part life cycle. This type of relay provides an extremely good size-to-power ratio performance, offering voltage ratings up to 70 kVDC and current ratings to 1,000 amps. These relays are engineered to interrupt DC loads while providing high shock and vibration resistance and the capacity to withstand a wide range of extreme temperatures. While operating with the same principles as electromechanical relays, these have features that support use in high voltage applications. The contacts are usually contained in a vacuum enclosed by glass or ceramic. This prevents contacts from arching. Aspects to consider are high relay performance specifications, including maximum voltage and dielectric strength. High voltage relays can be mounted in a variety of ways, including: bracket (or flange), DIN rail, panel mount, PCB, and socket.