Or, “Now presenting, the all new for 2011 International Rectifier PwndFET Transistors”
I suspect this happens when someone reverses the battery leads on a Xantrex Freedom series inverter. The IRF1010E HEXFETs are blown to bits! On the power board for a 1000 or 1500 watt unit (they both appear to be the exact same board), there are ten on each side.
The symptoms are usually an inverter which goes through the right motions of going into charge and invert, but no output is seen. Sometimes, the unit even makes the right sort of sound as if it were going into charge/invert. Inspection of the FET board will reveal… this.
The other devices on the board appear unaffected. Coming soon: an experiment to see what happens when the IRF1010E’s are replaced! Does this lead to a perfectly working board… or just an object which remains a paperweight? Stay tuned…