Patent ID: 7088216
Filing Date: 2006-08-08
Classification: H01H

Abstract:
1. A protective device for preventing overcurrent and overvoltage comprising: a base substrate, a first and a second pair of electrodes formed on the base substrate, a low-melting metal element connected between the first pair of electrodes to interrupt the current flowing between the electrodes by fusion, a heating element connected between the second pair of electrodes, wherein the heating element is in thermal communication with the low-melting point metal element in parallel circuit to heat and cause the low-melting point metal element to fuse when the overcurrent or overvoltage occurs, spacer members provided in contact with the first and second pair of electrodes respectively, wherein the spacer members are leads connected respectively to the electrodes, and an insulating cover plate opposed to the base substrate on the side of the base substrate having the electrodes and fixed at an aligned position in direct contact with the spacer members.