Diode Identification
 

I have a diode which I can't seem to find any information on. I've
tried all the usual sites and no-one seems to have any matching part
numbers.

Its from a LCD monitor power supply - from the recifier circuit (as far
as I can tell) - its was connected to a 400V cap which is also blown if
that helps any.

On the diode:
GP20-06
F51

The logo is a wavy F in a circle.The only company I can find which has
a similiar logo is frontier electronics, but they dont make diodes.

Any info would be appreciated.