Discount Electronic Components text.
Need assistance? Give us a call. (631) 234-3857

RT/RTR & RJ/RJR Series Trim Pots


RT/RTR and RJ/RJR series trim pots are made to military specifications and are listed on the QPL (Qualified Parts List). Which simply means that they are on a government approved list of parts that are approved for government and military use. RT/RJ series trim pots are made to the MIL-PRF-22097 and the RTR/RJR series trim pots are made to the MIL-PRF-39035. The major difference between RT/RJ and the RTR/RJR series is that the RTR/RJR trim pots are offered with a failure rate. A failure rate is the frequency at which a component fails during testing over a set period of time.

RJ12 trim-pot pot img

RTR/RJR series of trim pots are offered in three failure rate levels:
Note: Failure per 1000 hours of testing.

  • M = 1.0%
  • P = 0.1%
  • R = 0.01%

Although the RJ/RJR series and the RT/RTR series look pretty much identical, they have two different restive elements used for the resistive track that the wiper follows.

  • RT/RTR = Wirewound
  • RJ/RJR = Cermet

All the series of trim pots mentioned above are a sealed style trim pot, which means that the resistive track and the wiper are covered by a protective material. Depending on the configuration, these trim pots may have a temperature rating of -55°C to 150°C or -65°C to +150°C. Due to their small size trim pots are very fragile, and most manufactures rate their lifespan at 200 cycles so frequent adjustments are not recommended.

Part Number Breakdown for Military Trim Pots