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.
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.
