Phil Allison tastede følgende:

** Just checked a bin of assorted LEDs for breakdown voltage with a test
current of around 10uA.

The lowest was 30V and the highest was 157V - both red LEDs.

A blue LED was 21V.

Two white LEDs were 42 and 61V

LEDs of the exact same type show similar figures, but the variation between
types is large.


Beancounting:

If the variation is large, if X percent of the LEDs have a breakdown
voltage below the one in the circuit, a reverse diode cost Y, the
repair cost is Z, collateral damage is P, damage to reputation is Q, do
you pur a reverse diode in?

Perhapes forward voltage is a median, but if reverse breakdown is
fatal, it is the 0.001 percentile or something.

"Don't exceed this voltage, one in ... might break". Don't want it to
be the gear down indicator on your next flight.

Leif

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