Mica Capacitors- Tuesday, June 16, 2015

With over 7 Million Mica Capacitors in stock, make R&J Components Corp. your source for Mica Capacitors. Mica is a stable, inert material mined in India. When used as a dielectric, it is very stable and reliable. The standard temperature of Mica Capacitors is -55° C to +125° C and common values include 240pF, 270pF and 300 pF. Cornell Dubilier is the largest manufacturer of Mica Capacitors and R&J Components stocks a tremendous inventory of all of the following series:

  • CMR – High Reliability
  • CDV – High Voltage
  • CDS – Single Coat Mica

 Currently, Cornell Dubilier is the only manufacturer that is qualified (or QPL’d) to make Type CMR Series capacitors. The CMR series is a high reliability capacitor (.01%/1,000 hours failure rate) and meets requirements of MIL-PRF-39001. It is ideal for applications such as computers, jetcraft, missiles and other military and high frequency applications. The voltage of Cornell Dubilier’s CMR series capacitors runs from 50 Vdc to 500 Vdc. The capacitance runs from 1 pF to 91,000 pF.

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If you are buying CDE Dipped Mica Capacitors then you may be paying too much!- Thursday, October 16, 2014

SE Capacitor Dipped Mica Capacitors are designed to meet the exacting physical, electrical and environmental requirements of the MIL-C-5 and RS-153 specifications.

Why use Mica in your appplication?


It is well known that natural mica is extremely stable against heat. SE Capacitors are manufactured from selected Indian ruby muscovite mica having optimum electrical characteristics. Silvered mica is made by printing electrodes on mica film with special silver paste. The silvered films are stacked to the desired value interleaved with metal foils for contact. Then the terminals are clamped on to the element. (The terminals are copper clad steel wires finished with a solider coating for good solderability). 

The clamped unit is either dipped under vacuum in epoxy resin and coated with epoxy powder conformally or dipped in phenolic resin and vacuum impregnated with liquid epoxy resin. The envelope thus formed gives high moisture and heat resistance to the unit. This design ensures high reliability and stability.

Types of Dipped Mica Capacitors  


Ordering Code Information
We stock precision 1% tolerances

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