What does the term "dielectric strength" denote for insulation materials?

The term "dielectric strength" specifically refers to the ability of an insulating material to withstand electric stress without experiencing electrical breakdown. Essentially, it measures the maximum electric field that the material can endure before it fails as an insulator. This is a critical property for insulation materials because it indicates their effectiveness in preventing the flow of electric current through them under high voltage conditions.

Materials with high dielectric strength can maintain their integrity and functionality in environments with significant electrical stress, thereby ensuring safety and reliability in various applications. In contrast, options that focus on thickness, weight, or cost-efficiency do not reflect the inherent electrical properties that dielectric strength concerns; they are relevant factors but do not define the electric stability and performance of insulation materials in the context of high voltage.