Quote:
Originally Posted by rabbit73
A car alternator is designed to run with a case temperature of 200°F, according to a GM tech in Detroit that I consulted. He had done many measurements on car and truck alternators using thermocouples attached with thermal epoxy. I measured car alternators with a Fluke thermocouple probe when I was installing transmitters in cars to find out how much extra current could be drawn by the transmitter without damaging the alternator. For every 10 degrees C rise in temperature above 212°F (100°C), the life of the alternator is cut in half. The insulation on the wires starts to soften at about 120°C, depending upon the insulation Class. The diodes get pretty hot, too.
And your point is, for the current topic?
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"Now, take a small, enclosed case, filled with
rather delicate electronics...... See how long they hold up.....
I've seen melted circuit boards, melted plastics, and melted
and burned electronic components. Know matter how good
the quality, heat is the enemy of electronics."
My point is that electrical components like USVJ's, are the
most likely to fail and the most problematic......
And when would you possibly see a 200f under hood temperature
in a modern car???? None I know of.... and certainly not when
the ambient temperature is above 120f.... That is why we
see so many car fires these days...........