Hi, I have a stash of these small transistor-like things and I'm having trouble identifying them. Assumed NPN and E-B-C order, a sampling of three gave an hFE of 58, 73 and 118 and no other values for other pin combinations or PNP. They're marked as follows:
"script F" S20264 719
I'm guessing Fairchild? Does anyone have a catalog for obsolete Fairchild semiconductors that lists specs for these, or can provide the specs to me?
Thank you!
"script F" S20264 719
I'm guessing Fairchild? Does anyone have a catalog for obsolete Fairchild semiconductors that lists specs for these, or can provide the specs to me?
Thank you!
I really suspect that is a house number, not a catalog number. OEMs order semis by huge numbers, and many will have their inventory part number stamped on them rather than the industry number. And generally, the "real" part behind the number is proprietary information, so even if Fairchild still had those records, they couldn't share them.
That is just my opinion.
Many times the NTE/ECG/SK/etc books will cross a house number, but usually on consumer electronics. I looked, and they don't cross it. It could be a lot of things.
That is just my opinion.
Many times the NTE/ECG/SK/etc books will cross a house number, but usually on consumer electronics. I looked, and they don't cross it. It could be a lot of things.
Thank you Enzo for the background and for looking. It's a shame, these things are old and cool looking and I'd like to figure out how to use them in something.
I used to have loads of those old dome-top epoxy transistors at the shop.
I tossed them in the garbage - useless junk.
I tossed them in the garbage - useless junk.
How about general purpose NPN transistors? Perfect for controlling an LED somewhere. Try them in an audio circuit, might work fine, might work poorly. In a guitar amp, they might be great or they might be noisy. But in the channel switching or relay control, who cares if they are noisy?