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Re: [TCML] SIDAC



Hi James,

This is a week old, but I would recommend a jumper across the middle sidac(s) (remove it). Then use two P4802 sidacs at the far ends for 1040V. The IGBT's are perfectly acceptable for this voltage and your costs is reduced overall, especially over a large range of boards.

Simple and sweet, like my honey in her bare feet.. oh crap... here she comes..
Regards,
Bart

James wrote:
I also don't seem to understand the sidac specs. I think the half way
value is a good start. I was looking on Mouser and I think this is what
we need.
P3002ac pins 1&3 280-360v adv 320v P3602ac pins 1&3 340-440v adv 390v
P4202ac pins 1&3 380-500v adv 440v
P4802ac pins 1&3 440-600v adv 520v

It would appear to me that we need P3002ac. The breakover should be
320v. Three in series will be 960v. Is that going to be too high for the
transistor? Are we going to have to use two different part numbers? I
suppose one 3002 and one 4802 equal 840v. That should be ok for the
transistor. From Mouser the 3002's are $2.05 each; minimum quantity 295.
Sooo I need enough sidac's to load about 12 modules. This would have
been 36 of the F3000K1's. Later, James

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