UQ RF Capacitors

Part Number Information
Part #: Price/Availability:
UQCA Buy Now
UQCB Buy Now
UQCR Buy Now
UQCL Buy Now
UQCS Buy Now
UQCF Buy Now

AVX's UQ series RF capacitors are low fire dielectric caps whose near pure silver electrodes allow for superior conductivity. They are designed to minimize ESR while maximizing high Q to improve the overall performance of RF and microwave circuit designs. The UQ series has the lowest ESR and highest Q ratings of any RF capacitor on the market at frequencies higher than 900MHz.

UQ series RF capacitors are available in case sizes ranging from 0402 to 1210 and voltages from 50V to 500V. Tolerances range from as tight as +/- 0.1 pF for tolerances < 10 pF to as much as 20% for values > 10 pF. These capacitors were designed with MRI devices, high power industrial equipment, military, satellite, and radar applications in mind, but can be utilized anywhere where ultra low ESR and high Q are critical.


  • High-Q , Low Self Resonance and Ultra Low ESR in the following specifications:
    • DF of 0.05%
    • Voltages from 50-500V
    • +/- 0.1, 0.25, and 0.5 pF tolerances for voltages < 10 pF
    • 1%, 2%, 5%, 10%, and 20% tol available for values >/= to 10 pF
  • Six case sizes available (0402, 0603, 0605, 0709, 0805, 1210)
  • Non-magnetic and lead free terminations
  • Cost Advantage over time due to low fire dielectric


  • RF Power Amplifiers
  • Low Noise Amplifiers
  • Filter Networks
  • MRI Systems