I bought 4 of 23k3564. Are these the ones to use?
They will work. I have used them before.
This is a good substitute, Digi-Key Part Number 785-1184-5-ND.
I tried them in one TSE and they worked OK, but they do not have gate protection diodes built in. They could be blown under some conditions. They do blow instantly in one of my push pull driver designs. My TSE runs 45's at 320 volts. A higher voltage build may have issues.
Just about any mosfet with a 600 volt or higher Vdss rating and a low Crss will work. 15 pF is good, but there are better parts available. Look for a fet that specifically states that is has gate protection zeners, or shows them on the internal schematic. The diodes prevent gate damage on power up, but do add 5 pF or so to the Crss. The A/O part has a very low Crss, but no diodes. You can add an external diode, but that adds capacitance, and complexity
It isn't in the Digikey search criteria. I look at the data sheet for a fet in question. It is either mentioned in the text or shown in the schematic symbol. I'm sure that some fets may actually have the diode, but fail to show it. Others intentionally leave it out for capacitance reasons.
Toshiba TK5A50D is the recommended replacement from their recommendations. They rate it as "close". How "close"...beats me? It has a Crss of 3. Don't know about having the diode, though. It's schematic looks different from the 2sk3563. Thanks for the help George, I appreciate it.
http://www.toshiba-components.com/ParamSearch/all_parts.html?partfilter=2sk3563
http://www.toshiba-components.com/ParamSearch/all_parts.html?partfilter=2sk3563
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You can try the ON Semi NDF02N60ZH - George discusses it in the below link:
http://www.diyaudio.com/forums/tubelab/285087-5842-run-away-plate-voltage-2.html#post4584426
http://www.diyaudio.com/forums/tubelab/285087-5842-run-away-plate-voltage-2.html#post4584426
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Hi there. Searching for the power MOSFET alternative I've found STP6N60M2. Could you please confirm or deny possibility of usage it in TSE with 300B?
George had emailed me following to me about a month ago,.'The On Semiconductor NDF02N60ZG, or H and NDF04N60ZG or H are good choices if you can find them. '.. I think I found the NDF04N60ZH at Arrow Electronics...
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