Name the vfd part?

[charlieuk]

I have had a friend look a my old blown up vfd and he has tracked the problems down to two components I believe however one has know markings on it and he has asked me if I can try and track down what it is.

The part is in the picture bellow with the arrow pointing too it, it is a standard 2.2kw china vfd
If anyone can offer any help with what and were I may be able to find one it would be great to get it fixed up and to use it as a spare.

many thanks