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superfast soft switching 1kV rectifier diode

MUR1100ERL 1A 1000V, trr=75ns from RS. About 35p each.

At 30V and above, the reverse capacitance is less than 3pF.

Or do you have a more detailed spec of what you need?
 
Its to replace the rectifier in my valve intergrated.The guy who is helping me upgrade it recommend Fairchild Semi but thats about all I know.
 
Most of the big manufacturers make dozens of rectifier types; these often fit generic specifications. You really want a device type; failing that you need the voltage (1kV), nominal current, single cycle in-rush current, reverse recovery time and so on, in order to find something that fits.

I think you need to ask the guy who did the upgrade for more details.

The one I picked out is probably going to work; it is big enough (35A single cycle current, 1A continous) to handle the likely in-rush current at turn-on. But if there something weird about the circuit, or it has a very big reservoir cap, you might need something more exotic.
 
I use a set of 4 x Cree CSD05120A Schottky 5A 1200V in my WAD Kit88 valve amp, they are quite pricey though

The MUR1100ERL PD mentions should be fine and are cheap
 


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