Electrical insulation paper

WIMA metallized paper (MP) capacitors rated X2, or "across the line" operation (typically in EMI suppression filters). These can safely connected to low-impedance AC mains at rated AC voltage (here, 250 and 275V). "Ordinary" capacitors may not be connected "across the line" even if their DC ratings are well above AC voltage. 40/110/56 marking denotes climate conditions per IEC 60068–1 (-40˚C to +110˚C).

Electrical insulation papers are specific types of paper that are used as electrical insulation. They are used in many applications due to the outstanding electrical properties of pure cellulose. Cellulose is a good insulator and is also polar, having a relative permittivity significantly greater than 1.

Electrical paper products are classified by their thickness: papers thinner than 1.5 mils (0.0381 mm) are considered tissue, while those thicker than 20 mils (0.508 mm) are considered board.

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