Can't id components on inverter(Vector 1200 watts

Please i'm working on a 12volts to 110volts ac inverter Which has
some blown MOSFETs but i find it difficult to identify the part number
even tough there are some of the same kind w2hich have not blown up.
the numbers look like this 45N20B, CHN520,
The brand is Vector, Veco53c 1200 watts It was ordered from the
USA The Warranty is passed anyway.
I will be very glad if someone can help with a replacement.
Thanks

 

Find the datasheet for this 45 amp 200v N channel FET here ...

http://www.alldatasheet.com/view.jsp?Searchword=45N20B

Arfa