What are Mica and PTFE Capacitors?

Mica and PTFE capacitors are used in electronics. They store and manage electrical energy by using an insulating layer between two conductive plates. These capacitors are important for storing and releasing energy, which is vital for devices like radios, televisions, and electronic circuits.

Mica capacitors are highly precise, reliable, and stable, making them ideal for high-frequency applications. They are used in situations where capacitance, stability, and low impedance are needed, such as in radio broadcasting.

PTFE capacitors are good at withstanding heat, chemicals, and electricity. They are suitable for high-frequency and high-temperature environments. They are useful in extreme conditions, such as those found in aerospace and telecommunications equipment.

Top manufacturers include Cornell Dubilier, Vishay Intertechnology, TDK Corporation, and Murata Manufacturing.

Common Problems and Things to Think About When Designing:

Modern mica capacitors are reliable because of the stable materials used in their construction. They can be treated like C0G ceramic capacitors. However, like other capacitors, they can fail due to vibration, impact, or thermal cycling. Moisture can also corrode the electrodes, which is another issue to be aware of.