Dielectric strength, also known as dielectric breakdown strength (DBS), is the maximum electrical potential that a material can resist before the electrical current breaks through the material and the material is no longer an insulator. DBS is tested per ASTM D149 and measured in kV/mm or V/mil.
When looking at DBS values, it is important to consider at what thickness the measurement was taken. Materials tested in thin sections will yield higher DBS values in kV/mm than materials tested in thick sections. Ideally, both thick and thin materials would yield the same DBS results, since the units are electric potential per thickness, but with thicker materials come more impurities, no matter how small, which will ultimately lead to the decrease in DBS.
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Our Electronic Materials product line includes solutions that have high dielectric strength (electrically insulative) as well as materials that are electrically conductive.