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B1-F90 Properties
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Bert Alarid   Posted  1/30/2014 2:25:02 PM
Last : 2/3/2014 2:23:24 PM
Posts : 2
Visits : 3
The black dot is the positive terminal, polarity mattered, did not work correctly with opposite polarity, seemed to Zener at 77-79V, tested to 1000Vdc for several seconds, will try with pulse next as that is what it was designed for TVS very high current could meet my needs, if works I will be trying to find a few more good parts.
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Bert Alarid   Posted  1/30/2014 2:04:00 PM
Last : 2/3/2014 2:23:24 PM
Posts : 2
Visits : 3
Found an old timer that said, "there are no data sheets for this part, its like 50 years old and obsolete." however, basically a tube surge suppressor that breaks down at 60V. Can handle high voltage high current switch and very fast. You can characterze it by selecting a current limiting resistor and testing where it actually breaks down.
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