RE: ASAP! Taking Orders for SSTC Power Boards ! ! ! $40.00 each

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Stephen Conner by way of Terry Fritz <teslalist-at-qwest-dot-net>" <steve-at-scopeboy-dot-com>

At 08:17 02/06/03 -0600, you wrote:
>Original poster: "Mccauley, Daniel H by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
>
>
>Actually, those "big bricklets" are extremely easy to find. Newark, Digikey,
>and Allied all carry a wide variety in stock
>for fast delivery.

I tried the two main UK sources of components, RS and Farnell. RS had none, 
Farnell had a selection of about a dozen, although the IXYS brand that you 
used wasn't there. A 50 Amp 500V unit (APT50M50JVR) cost about $100 in 
small quantities, compared with a 45 Amp 500V T0-247 device (STW45NM50) 
that costs about $13.

Admittedly the bricklet (formally known as an ISOTOP or SOT-227B package) 
does have a much better power dissipation, 750W -at-25 degC compared with 260W 
for the TO-247 part. However, three TO-247 packages in parallel could equal 
the dissipation and still be less than half the price. In Britain anyway. 
What are the economics like in the US?

>Also, my primary goal isn't to provide the group with
>SSTC boards.  I'm designing this board for a specialized project for myself
>which has its own design requirements.

Fair enough, but I thought potential buyers should be aware that the board 
was for ISOTOP packages only. But then if they're easy to get at sensible 
prices in the US that's no big deal... BTW What kind of components are you 
using to disable the body-drain diodes in your design?

Steve C.