Hi im having trouble finding a suitable replacement for this wumfa, i believe it to either be a MOV (Metal Oxide Varistor) or a capacitor of some description.
The information printed on it is a f logo 250 145 zlc6, see attached pictures below if anyone can help.
For more information this came out of a SIP to FXS converter and after removing restored life to the unit, visually it appears to be in parallel with the incoming circuit, as for what a Wumfa is if it please refer yourself to the quote "if it wumfa that the problem would be fixed."