12BW4 BLACK PLATE View larger


Quality miniature glass full-wave rectifier tubes manufactured in the United States by renowned Sylvania. These 9 pin high current tubes can output a steady 350 mA, and come with black plates and top round getters. They are printed in yellow SYLVANIA MADE IN U.S.A. and coded CR AER. They are also glass etched 12BW4 U.S.A. Boxes are standard Sylvania yellow and black printed 12BW4.


  • New Old Stock (New in box)

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Data sheet

CountryUSA / Canada
TypeHalf-Wave and Full-Wave Rectifier Tube
Base9 pin miniature Noval B9A
FonctionFull-wave rectifier