AC/DC Converter Hipot Test

Isolation Voltage is an important factor for selecting a suitable AC DC Converter for your application, so this value is commonly listed on Digi-Key’s website for parametric value filtering.


Also referred to as the input to output isolation voltage, isolation voltage represents the maximum voltage that can be applied across the converter while still maintaining electrical isolation between input and output. The isolation voltage can, therefore, be regarded as a measure of the insulation’s ability to withstand high transient voltages lasting only a few seconds.

The Hipot (High Potential) Test is a popular method to test the Isolation voltage of a AC DC converter. For example, the Artesyn Embedded Power LPS100-M series’s datasheet lists the isolation voltage (Input – Output) as 4000VAC.

The Hipot Test can be set up according to the diagram here:


Put short and simply, the Hipot test is performed by applying a high voltage from the mains-input line to the chassis of the product or the secondary output, then measuring the resulting leakage current through the converter’s insulation.