Patent ID: 8279575
Filing Date: 2012-10-02
Classification: H01C,H01H

Abstract:
1. A thermally protected surge suppression device, comprising a housing and a base seat with a mounting plate, wherein a surge suppression component, a thermal protection device and a low temperature solder are set on the base seat; the surge suppression component is provided with an electrode a and an electrode b, and an extension portion of the electrode a extends outside the base seat to form a pin A of the surge suppression device; the thermal protection device is provided with a conductive metal member, and an extension portion of the conductive metal member extends outside the base seat to form a pin B of the surge suppression device; wherein the thermal protection device further comprises (a) a metal bulge electrically connected to the electrode b of the surge suppression component, (b) a compression spring, (c) a slider moveable on a guide-track groove of the mounting plate, and (d) an arc extinguishing component positioned at the top end of the slider; when the thermally protected surge suppression device is operated at a rated voltage and a rated current, the conductive metal member is electrically connected to the metal bulge via the low temperature solder; when the surge suppression component fails and its resistance lowers, power frequency faulty current is passed through the surge suppression component to heat the surge suppression component, making the low temperature solder melt, and the conductive metal member is disconnected from the metal bulge, and the arc extinguishing component on the slider is pushed to move by the compression spring so as to obstruct a gap resulted from the disconnection, and to generate an airflow to extinguish the electric arc in the gap between the conductive metal member and the metal bulge.