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General-purpose Relay: Direct Current

FAQ No. FAQ02817

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Can a direct current be applied to one set of contacts and an alternating current to another set of contacts on the same Relay?


Yes, but problems may occur depending on the load conditions. If different currents are applied to the Relay, do not have it simultaneously switch a large load and a microload, and do not use the Relay in a circuit with a difference in electric potential across the circuit.

The purity of the contacts used for microload switching will be lost due to the contact spattering that occurs when switching a large load, and this may cause contact failure when switching a microload.