Mica and PTFE capacitors are capacitor devices typically featuring thin sheets of mica or Polytetrafluoroethylene (PTFE) as the dielectric material. The sheets of mica usually have a coating of deposited metal as well as a layer of epoxy, the latter to protect against environmental elements.
Mica and PTFE capacitors provide optimum stability and hence are ideal for applications that require high stability, reliability and precision. As such, they are commonly used in high-frequency applications.
Types
Mica and PTFE capacitors are available in a wide range of varieties, each differing in specifications like the voltage, capacitance range, factor, etc. These include:
Standard dipped mica capacitors
Reel packed dipped mica capacitors
Miniature dipped mica capacitors
High reliability dipped mica capacitors
High voltage mica capacitors
SMT multilayer PTFE capacitors
High frequency dipped mica capacitors
Applications
These capacitors are used extensively across different electronic applications. They are usually found in:
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