Cross for BUZ 103?

[unitron]

Need to replace a BUZ 103 on a motherboard. Haven't found any specs
on it anywhere or anyone selling them. Anybody know of a cross for
it?

 

[Robert Baer]

Need to replace a BUZ 103 on a motherboard. Haven't found any specs
on it anywhere or anyone selling them. Anybody know of a cross for
it?

Not listed in the NTE crossref #9 or any of my other crossref back to
RCA SK series (1989).
Go by size for power replacement purposes, and Ass-U-Me it is
SandPower (silicon) and not FlowerPower (geranium - errrr - germanium);
measure voltages and do some circuit tracing to get goo guess on NPN or
PNP.
Pick any convenient similar transistor and toss it in; works for me
every time.

Since you say it is on a motherboard, i am going to guess you mean a
personal computer MB; and that leads me to suspect a TO-220 outline;
then a NPN power transstor.

 

[unitron]

Not listed in the NTE crossref #9 or any of my other crossref back to
RCA SK series (1989).
Go by size for power replacement purposes, and Ass-U-Me it is
SandPower (silicon) and not FlowerPower (geranium - errrr - germanium);
measure voltages and do some circuit tracing to get goo guess on NPN or
PNP.
Pick any convenient similar transistor and toss it in; works for me
every time.

Since you say it is on a motherboard, i am going to guess you mean a
personal computer MB; and that leads me to suspect a TO-220 outline;
then a NPN power transstor.

However since it's probably part of an on-board switching voltage
regulator it might be some sort of FET instead of a bipolar, but,
lacking an electron microscope or the knowledge to use it if I did
have one, I have no way of knowing without finding some specs or a
cross.
It is a TO-220. Had a scar for several months from accidentally
touching the heat sink to which it was bolted.

 

[Robert Baer]

However since it's probably part of an on-board switching voltage
regulator it might be some sort of FET instead of a bipolar, but,
lacking an electron microscope or the knowledge to use it if I did
have one, I have no way of knowing without finding some specs or a
cross.
It is a TO-220. Had a scar for several months from accidentally
touching the heat sink to which it was bolted.

There was a serious (design?) problem if it was *that* hot...no wonder
it failed.
With that history, i would toss the MB and get a new (better design?)
one.