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I am having a great deal of difficulty finding the maximum voltage I can subject a relay to. I need a relay that can carry 500mA at 400 volts.In my application however,the relay will never actually switch when the voltage is applied. THe controlling computer will set the relays to their proper configuration,then apply the power. The woltage wil be removed,then the relays will change over to the next configuration. Is it actually necessary to use a relay that can switch 400 volts or am I looking at the wrong specification?