Complex protection device for blocking abnormal state of current and voltage

摘要

A complex protection device for blocking an abnormal state of current and voltage is disclosed. In the complex protection device, a resistive element is configured in the form of a structure and thus the resistive element has enhanced durability and surface mounting technology suitable for automation may be utilized, and a plurality of resistive elements is configured in various resistances and sizes to be optimally designed for product characteristics.

主权项

1. A complex protection device for blocking an abnormal state of current and voltage, the complex protection device comprising:
a fusible element connected to first and second terminals formed on a main circuit and 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 above the reference voltage is applied to the main circuit, wherein the first and second terminals and the resistance terminal are disposed in parallel on the same plane to be spaced apart from each other and the fusible element is blown by heat generated by the resistive elements when a voltage above the reference voltage is applied, and wherein the resistive elements comprise first and second resistive elements connected to each other in parallel at opposite sides of the fusible element.