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FC3VR Leo Series

Low G-Sensitivity Crystals

Vibration Resistance

for 5G Wireless Communications

The FC3VR Leo improves system performance in designs exposed to modern environmental conditions. The state-of-the-art resonator incorporates patented technology that allows the FC3VR to hold superior frequency stability when compared to conventional crystals.

The low G-sensitivity makes the FC3VR ideal for wireless communication applications operating in active surroundings in which signal lock and low data loss are of utmost importance. G-sensitivity is the change in frequency resulting from an acceleration force applied to a frequency control device. The dynamic performance of a typical quartz crystal resonator will degrade under adverse environmental conditions such as G-forces (acceleration) or vibration.

The FC3VR's patented resonator technology allows the devices to hold system performance nearly uniform on all axes while retaining the same form, fit and function as conventional crystals. No other circuit substitutions are required to try the low G-sensitivity crystals, and the benefits in performance and reliability begin immediately.

The FC3VR series features the following specifications:

  • Industry Standard 3.2 x 2.5mm Package Size
  • Tolerances Down to ±10 ppm
  • Low 0.2 ppb/G Vibration Sensitivity

Please contact your sales representative for more information on your specific requirements. Custom application inquiries are invited.

Improve system performance in applications exposed to harsh real-world conditions

Product Information


  • 5G cellular​
  • IoT
  • V2X automotive connectivity
  • DSL​
  • Ethernet networking​
  • Military/Aerospace​
  • Smart Agriculture


  • 33 - 52 MHz frequency range
  • 3.2mm x 2.5mm Footprint
  • -40~ +85°C operating temperature range
  • Patented Technology
FC3VR Comparison Charts
FC3VR Acceleration Sensitivity Comparison
The chart above compares the acceleration sensitivity between a conventional quartz crystal and the Fox FC3VR. As the chart illustrates, replacing your conventional quartz crystal with the FC3VR instantly gives you a massive improvement in sensitivity to acceleration. The less sensitivity to acceleration, the better your phase noise. Better phase noise means better communication and less data loss.
/Phase Noise X-Axis Acceleration 2.5G Conventional Design
Conventional frequency control devices can show you a nice low phase noise plot, but you see a 30 dBC/Hz difference when that same part is put under vibration.
Phase Noise X-Axis Acceleration 2.5G FC3VR
Put the FC3VR in the same vibration conditions as the conventional DUT, and you still get the nice phase noise plot that you expect. The vibration is nearly cancelled.

Popular Frequencies and Applications

The list below shows the most requested FC3VR frequencies and specifications, but these are not the only available options. Many more frequencies and specs have been developed, and we can offer custom variations to meet your requirements.

Part Number Frequency Load Capacitance Applications
FC3VREEDM38.4-T1 38.4 MHz 8pF IoT, DECT, WiFi, Bluetooth
FC3VREEDM38.88-T1 38.88 MHz 8pF 5G Base Stations, SONET, SDH
FC3VREEDM40.0-T1 40.0 MHz 8pF Automotive Vision Systems, NXP S32V234, 802.11p, V2X RF Transceiver, WAVE, DRSC, IoT, Qualcomm QCA4020, WiFi, Bluetooth, BLE, NFC, Simplelink, Zigbee
FC3VREEDM48.0-T1 48.0 MHz 8pF WiFi, Bluetooth
FC3VREEEM38.4-T1 38.4 MHz 10pF IoT, DECT, WiFi, Bluetooth, Silicon Labs WF200 series Transceiver, BLE, Silabs Wireless Gecko SoC
FC3VREEGM36.0-T1 36.0 MHz 12pF G.Fast, xDSL
FC3VREEGM38.4-T1 38.4 MHz 12pF IoT, DECT, WiFi, Bluetooth
FC3VREEGM38.88-T1 38.88 MHz 12pF 5G Bases Stations, SONET, SDH
FC3VREEGM40.0-T1 40.0 MHz 12pF 802.11p WiFi, Bluetooth, BLE, NFC, Simplelink, V2X RF Transceiver, WAVE, DRSC, IoT, Qualcomm QCA4020, Zigbee
FC3VREEGM50.0-T1 50.0 MHz 12pF Ethernet, PLLs, Frequency Generators, Microcontrollers, Processors

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