Provides the bias voltages to operate microwave system amplifiers while allowing remote placement


The Keysight 87421A universal input, DC switching power supply provides bias voltages to operate Keysight microwave system amplifiers. Integrate these compact power supplies into a system or use standalone on the bench. The 87421A may also be used to supply bias voltages to the Keysight 83440C high speed lightwave converter with the Keysight 83440-60009 lightwave converter power supply adapter.


  • Designed for Keysight microwave system amplifiers (83006A, 83017A, 83018A, 83050A, 83051A, or 87415A)
  • 2-meter bias cable for remote placement
  • Compact size for easy system integration

DC Output Voltage/Current

  • +12 V at 2.0 A, -12 V at 200 mA
  • Output Power: 25 W, maximum

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