This was pulled from my microwave -- it was being flaky, replaced this filter with a new one, and found out that this board hadn't been the problem (it was the main controller board). But...I couldn't return the board I didn't need.
This board with the fuse costs over $170!! My loss is your gain -- this board was not at fault.
Make SURE this is the right board for your microwave. The only model that I know for sure uses it is Thermador's MBES/01.