how hot can a transistor get

[j van c]

I changed a transistor on a print with another recommanded transistor.
He's getting quite hot. I can't hold my finger on it.
Is this normal?

 

[colin]

"j van c" <jvancxyz@pandora.be> wrote in message
news:AQP4d.299$XT2.55304208@hestia.telenet-ops.be...

I changed a transistor on a print with another recommanded transistor.
He's getting quite hot. I can't hold my finger on it.
Is this normal?

in my experience transistors can work quite hapily but be to hot to touch
for any lenght of time,
however i seem to have more sensitive fingers than most people,
also if it leaves a mark on your finger or even takes skin off then i would
say its too hot, especialy if it has any heatsink.
this ocurs much above 60'c i think wich means the silicon is probably a lot
more,
but typicaly silicon devices are speced up to over 100'c, but reliability
goes down with increasing temp.

Colin =^.^=

 

[Jamie]

no
put a heat shink on it.
it depends also on how fast it gets
...


j van c wrote:

I changed a transistor on a print with another recommanded transistor.
He's getting quite hot. I can't hold my finger on it.
Is this normal?