公开(公告)号：US10395876B1

公开(公告)日：2019-08-27

申请号：US16290317

申请日：2019-03-01

申请人： Polytronics Technology Corp.

发明人： Tsung Min Su ,  Chia Mao Chen ,  David Shau Chew Wang

IPC分类号： H01H85/00 ,  H01H69/02 ,  H01H85/20 ,  H01H85/04 ,  H01H85/041

摘要： A protection device comprises a first planar substrate, a second planar substrate, a heater and a fusible element. The first planar substrate comprises a first surface, and the second planar substrate comprises a second surface facing the first surface. The heater comprises a first heating element and a second heating element in parallel connection, and the first heating element is disposed on the first surface. The fusible element is disposed on the first surface and adjacent to the first and second heating elements, thereby the fusible element is melted by absorbing the heat generated by the first heating element and/or second heating element. The second heating element has a resistance at least twice that of the first heating element.

公开(公告)号：US10943755B2

公开(公告)日：2021-03-09

申请号：US16593312

申请日：2019-10-04

申请人： Polytronics Technology Corp.

发明人： Tsung Min Su ,  Chia Mao Chen ,  David Shau Chew Wang

IPC分类号： H01H85/175 ,  H01H37/76 ,  H01H85/00

摘要： A protection device comprises a substrate, a fusible element, a flux and an insulating cover. The fusible element is disposed on the substrate and connects to a power line of an apparatus to be protected. The flux is disposed on the fusible element. The insulating cover is secured on the substrate to form a room for receiving the fusible element. The insulating cover has a bottom surface facing the substrate, and a plurality of protrusions are formed and distributed on the bottom surface to hold the flux in place.