Patent ID: 9607795
Date: 2017-03-28
CPC Classifications: H01H,H02H

Claim:
1. A complex protection device for blocking an abnormal state of current and voltage, the complex protection device comprising: a fusible element connected to a first and a second terminals disposed on a main circuit and configured to be blown when overcurrent is supplied to the main circuit; a plurality of resistive elements connected in parallel to a resistance terminal connected to the fusible element; and a switching device controlling such that current flows to the resistance terminal when a voltage higher than a reference voltage is applied to the main circuit, wherein the first and second terminals and the resistance terminal are disposed in parallel on a same plane to be spaced apart from each other and the fusible element is configured to be blown by heat generated by the plurality of resistive elements when the voltage higher than the reference voltage is applied, and wherein the plurality of resistive elements comprise a first and a second resistive elements connected to each other in parallel at opposite sides of the fusible element, and wherein the complex protection device further comprises: a first and a second connection terminals connected to the first and second resistive elements and disposed between the first and second terminals; and an insulating layer and a conductive layer sequentially stacked on the first and second connection terminals, and the first and second resistive elements and the fusible element are disposed in parallel on the conductive layer.