Working Voltage Ratings Applied to Inductors

There are challenges to determine voltage ratings for inductors, either by testing or calculation. Inductors do not support dc or low frequency working voltages unless the inductance is high (typically >1 mH). Testing to verify working voltage can be difficult and should be application dependent. The various ways inductors are made, and the stresses of processes like wire bending, make calculating a theoretical voltage rating infeasible. This whitepaper presents these issues to make it easier to choose the inductor most appropriate for the specific application.

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