High voltage transistor

Hi guys.

I am looking for a transistor to be used as a switch at 1500 Volts and up to 200KHz freq. with a current of up to 100mA, maybe less.

Untill now I found only 1200 types.

Thanks,
Ioannis

Hi, Ioannis

BU 157 ... BU 500 ... MJ 12002 -12004 ...

a look to keyword "Cascode" could be useful too ...

Regards

Alain

Thanks Alain. It seems really hard to find transistors today. Everybody is producing ICs...

Ioannis

MOSFET=
STW3N150, IXTV03N400S, IXTH6N150, STFV4N150,
There are a bunch of numbers from IXYS and STMicroelectronics.

Many of the transistors are not in production now. You can find old stock.

What are you building?

Thanks Ron, although the project was canelled. It is been two years now...

It was a switching controller for high voltage low current load.

Ioannis

That does not tell me much.

High voltage transistors (NPN) are slow!! An 800 Volt transistor is faster than a 1000V part. The 1500 volt parts I used are dog slow.

My experiance is from switching power supplies, solar/wind, CRT monitors and TV sets. A 1500 volt transistor will not run at 200khz. Maybe not at 100khz. Your AC loss will be huge! Not knowing what you are doing....you may need a 1500 V. diode that may burn 5 watts alone.

Most high voltage junction transistors were made for CRT monitors. They are not in production! I used a high voltage J-FET that I liked. (Silicon Carbide) I can't get the part number from my head.

Quote:

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Originally Posted by Ioannis

It was a switching controller for high voltage low current load.

Ioannis

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It doesn't matter anymore Ron.

The project is cancelled over 1 and a half year now.

I do not know what exactly my customer would do, but asked me to make a 200KHz, 1,5KV switch for as much as 100mA.

Ioannis