>=20
> Hi!
> I need a very high voltage (50kV), high current (preferably > 6A) diode, =
but I
> have no need for it to have a fast recovery time.
>=20
> Can you please suggest a suitable, and not too expensive, diode, if it ev=
en
> exist?
> Microwave diodes I found are all low-current, and are thus not suitable.

AFAIK all microwave diodes are low voltage and low current, unless they are=
 designed for microwave generation in which case they are specialised.

>=20
> Or, would it be safe to make it chaining several smaller voltage rect. di=
odes?

That is the normal method of making high voltage diodes, e.g. for CRT EHT g=
eneration.

I was going to suggest using a diode stack off a CRT EHT coil, but I believ=
e they are often integrated in and distributed through the coil to help eve=
n out the reverse voltages.

Making your own high voltage stack is fraught with problems and you will ne=
ed to consider equalising capacitors and maybe resistors across each diode =
to limit the reverse voltage each individual diode sees.

You would be better off purchasing a pre-built stack such as one of these .=
...
http://ppmpower.co.uk/products/uncategorized/rectifier-blocks-with-insert-m=
ounting/

That link contains several with listed PIV of 60kV, but less than 1A. There=
 is one at 50kV at 3.5A average forward current. Why do you need 6A, or is =
that a peak current?



--=20
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