Patent ID: 7741946

Claim:
A metal oxide varistor with a heat protection comprising: a body having a first side; a second side; a first contact being attached to the first side; and a second contact being attached to the second side; an insulated washer being attached to the second contact and having a lower surface; an annular edge; and a through hole having an inner wall; a first lead being mounted on and electrically connecting to the first contact; a second lead being mounted on the insulated washer; a thermal fuse being mounted on the insulated washer and having a first end electrically connecting to the second contact via the through hole in the insulated washer; and a second end electrically connecting to the second contact via the through hole in the insulated washer; a conductive sleeve mounted securely in the through hole in the insulated washer and having a lower end attached securely to the second contact, and the second end of the thermal fuse electrically connected to the conductive sleeve at a solder joint; and a cover being mounted above the second side of the body and the insulated washer and having a bottom annular edge mounted on the insulated washer; and a top inside surface being away from the insulated washer and forming a sealed cavity between the cover and the insulated washer.