MR Transistors

**Skottsaber** · 07-30-2010, 08:17 AM

Hey all,

I have an MR board missing a blade transistor, and I want to replace it rather than chuck out 50 bucks.
I looked at the text on a transistor on the board and got this:

H
8050
GC SD

Does this contain any info at all? If not, does anybody know a part number/transistor type I can get as replacement?

Thanks,
Scott

**Don Se Wion** · 07-30-2010, 02:46 PM

I did some quick search and found a few datasheets for 8050.
I guess the original transistor is this chinese one:

http://www.datasheetcatalog.org/data...2/122448_1.pdf

Alternatives may be:

http://www.datasheetcatalog.org/data...s/mXyzqxst.pdf
or
http://www.fairchildsemi.com/ds/SS%2FSS8050.pdf

Others could be available, 8050 seems to be built by several brands.

**Skottsaber** · 07-31-2010, 02:21 AM

THANK YOU SO MUCH!
This is just the answer I needed. Unfortunately I haven't found one in my local electronics places but I did find one that I can get delivered.

Kudos to Don Se Wion!

**Don Se Wion** · 07-31-2010, 03:23 AM

Always happy to be of some help

**Jedi Jo-Dan** · 08-01-2010, 07:11 PM

Looks like a simple transistor switch. Replacement should not be critical. I'd try a 2N2222, or a 2N3904. Should be available at Radio Shack. It'll either work or not but won't hurt anything if not. Just be sure to connect the transistor correctly E-B-C wise.

**Skottsaber** · 08-02-2010, 07:31 AM

Heh... if you looked at my location I am in South Africa, no Radioshack here.

I did hunt down the Fairchild model local so I'll order one asap.

EDIT:
Upon new information provided by Zook, who repairs these boards, I have found the correct transistor, a BC547.
Here is an old thread with still useful info I want to regurgitate from the bowels of the forum, and I think it should be stickied in the appropriate section.

Many thanks to Zook.

EDIT EDIT:
Darn these things are cheap! I can get minimum 5 for R1.21 ($0.167)!
(I guess thats made in China for you!)

**Jedi Jo-Dan** · 08-03-2010, 04:50 PM

Ah, so sorry on the location.

The BC547 is another good general purpose NPN; should work fine. I usually recommend "2N" type 'cause they're what I'm used to using in all my projects.

Good luck!