Electronics > Beginners
Identify ITT diode
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rdagger:
I'm trying to identify a diode.  The only markings are ITT.  It looks like a 1N4004, but it has a very low voltage drop of around .23V.  It was in a full wave rectifier circuit.  The date codes on the board are between 1977 and 1978.
Benta:
Could be a Schottky, something like a 1N5819. But if you measure forward voltage, you need to put something like 100 mA through the diode to get a meaningful result.

rdagger:
I retested by placing the diode in series with a 0.5A lamp.  The voltage drop climbed to 0.35V.
The same circuit with a 1N4005 showed a voltage drop of 0.82V
Benta:
Well, Schottky then.
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