Fast recovery diode query

- N
- N_Cook
  
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posted
16 years ago

Mon, Apr 21, 2008 9:30 AM

Firstly is "fast recovery" diode = = "high speed" diode?

I have 2 ok diodes of originally 3 on a board, one missing. 1N4148 in size and form but known to be fast recovery types.

Is there a non-destructive test I could say graph-out sub 10mA and sub 20V plots of something of one and infer something about their manximum ratings?

They have 2 green colour bands and one thick blue band. I've scanned through a listing of 1500 fast recovery diodes of less than 100mA rating for 55 and a 6 in the type numbers but nothing found.

- E
- Eeyore
  
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posted
16 years ago

Mon, Apr 21, 2008 11:05 AM

Basically yes.

Well ... diodes that small usually are fast types anyway. It's only 'power diodes' (usually 1A rated and above) that are slow enough for there their fast equivalents to be separately designated.

Graham

- L
- legg
  
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posted
16 years ago

Mon, Apr 21, 2008 11:47 AM

Don't assume the missing one is the same type, or even required, if not present.

RL

- S
- Sam Goldwasser
  
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posted
16 years ago

Mon, Apr 21, 2008 12:29 PM

How do you know?

Nothing I'd trust.

What sort of circuit are these in?

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