The HFA3134 and HFA3135 are Ultra High Frequency Transistor pairs that are fabricated with Intersil Corporation's complementary bipolar UHF-1X process. The NPN transistors exhibit an fT of 8. 5GHz, while the PNP transistors have an fT of 7GHz. Both types exhibit low noise, making them ideal for high frequency amplifier and mixer applications. Both arrays are matched high frequency transistor pairs. The matching simplifies DC bias problems and it minimizes imbalances in differential amplifier configurations. Their high fT enables the design of UHF amplifiers which exhibit exceptional stability.


  • NPN Transistor (fT) 8.5GHz
  • NPN Current Gain (hFE) 100
  • NPN Noise Figure (50Ω) at 1.0GHz 2.6dB
  • PNP Transistor (fT) 7GHz
  • PNP Current Gain (hFE) 57
  • PNP Noise Figure (50Ω) at 900MHz 4.6dB
  • Small Package (EIAJ-SC74 Compliant) SOT23-6
  • Pb-Free Plus Anneal Available (RoHS Compliant)


  • VHF/UHF Amplifiers
  • VHF/UHF Mixers
  • IF Converters
  • Synchronous Detectors

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active SOT23 Reel 3000

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
HFA3134, HFA3135 Datasheet Datasheet PDF 364 KB
User Guides & Manuals
RF Product Selection Guide Guide PDF 3.64 MB
Application Notes & White Papers
AN1694: The Four Basic Building Blocks of an Op Amp Application Note PDF 357 KB
PIN19006 - Price Increase for the Listed Renesas Electronics America Products Price Increase Notice PDF 257 KB
PIN17006 - Q1 2017 Price Increase Price Increase Notice PDF 227 KB