Metal oxide varistor with heat protection
AssigneeThinking Electronics Industrial Co., Ltd.
InventorChang-Wei Ho
Life of this patent
Estimating the term…
Abstract
A metal oxide varistor with heat protection has a body, an insulated washer, a first lead, a second lead and a thermal fuse. The body has two sides and two contacts respectively on the sides. The insulated washer is attached to one contact and has a through hole. The first lead is mounted on the other contact. The second lead is mounted on the insulated washer. The thermal fuse is mounted on the insulated washer and electrically connects to the second lead and the second contact. When the body overloads and overheats, the thermal fuse causes the circuit to open quickly, and the insulated washer keeps the thermal fuse from electrically connecting to the second contact again.
Claims15
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.
Dependencies are inferred from the claim text.