What materials are commonly used to cover fixed capacitors for protection?

The use of waxed paper, plastic, or ceramic as materials to cover fixed capacitors is prevalent due to their insulating properties and resistance to environmental factors. These materials provide effective shielding against moisture, dust, and mechanical stresses, which can impact the performance and longevity of capacitors.

Waxed paper offers a balance of dielectric properties and physical protection, while plastics are lightweight, durable, and can be molded into various shapes for efficient casing. Ceramic, known for its stability and resistance to high temperatures, is also used in some capacitors, providing an additional layer of protection while maintaining reliability under varying conditions.

Overall, the combination of these materials creates a robust environment for capacitors, ensuring they perform consistently in electrical circuits.