Source for TAS EOB Transistors?

I found mine on eBay, search for the number. I bought five of each when I blew up the EOB board with an errant loose wire. It was a bit of a PITA to replace them due to the way they mount on the heatsink, but they in and it runs again, that's what counts.

How's this for a source, looks to be about $8.50 US for five of them? 5 x Insulated Tab TOSHIBA FET N-Chn Transistor 2SK2312

Thanks again for link John. Not a bad price either. I Agree the mounting technique is pretty weird I assume they had some sort of jig to get the transistors into the circuit board???

Pete

9540 is used on some of the other Lionel Motor Control boards, and I think there is a IFR component like 540 or such that is complimentry to it. May not have to use SK2312. Try a search on the IRF and compare data. G

quote:

Originally posted by GGG:
9540 is used on some of the other Lionel Motor Control boards, and I think there is a IFR component like 540 or such that is complimentry to it. May not have to use SK2312. Try a search on the IRF and compare data. G

Since there's a cheap source of the exact part, why would he start substituting?

$8.50 is not cheap for that type of transistor. Using Ebay doesn't ensure a quality component, and it is obsolete.

Additionally, some of the newer ones can include a greater Amp/Voltage capacity with the rest of the parameters similiar.

Just offering an alternative and a matched pair from the same manf. G

G, $8.50 gets you five of them. The seller has a 100% rating. No worries.

Pete

quote:

Originally posted by GGG:
$8.50 is not cheap for that type of transistor. Using Ebay doesn't ensure a quality component, and it is obsolete.

Additionally, some of the newer ones can include a greater Amp/Voltage capacity with the rest of the parameters similiar.

Just offering an alternative and a matched pair from the same manf. G

I bought those, and they were indeed brand new Toshiba parts. They also worked perfectly in my TAS EOB unit. I don't see $8.50 total as particularly expensive for these, and they're the exact replacement.

You're providing guesses as to what might be compatible, hardly the same as using the exact replacement. You also didn't tell us what your matched set would cost...

OK, John I give. Jeez an argument about everything. Go look at your Lionel boards and see what is being used. Everyboard I have seen is using complimentary pairs from the same manufacture. I am not guessing either, you do the comparison with the data sheets.

Most of these motor drivers boards have the same basic design.

The IRF 5 series and the 9 series cost me .60 and .90 cents a piece. I will say again, I was providing an alternative and the ability to install a higher rated transistor.

In many cases you can buy a component with the same collector current trigger requirement, but with a higher amp, voltage and watts rating. Improving the robustness of the circuit if you want. G