Mystery diode "4L"

May 02, 2013 1 Replies
A

Any electronics whizzes recognise an axial diode slightly smaller than a



1N4001 bearing just the marking "4L" along with a blue cathode band? It's used in a switch mode power supply of 1993 vintage running at around 25kHz. No other clues I'm afraid.

AWEM



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A

If you can say where it's used (input rectifier, output rectifier, etc) and the rating spec of the SMPSU, we can almost certainly give you a current part number to use as a replacement.

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