| 简介 |
A fusible link includes a fuse portion that has a first resistance portion and a second resistance portion which are formed of a fusible metal conductor. The first resistance portion has a fusible portion which is provided in proximity to a connecting portion of the first resistance portion with the second resistance portion. The fusible link further includes a metal chip whose melting point is lower than a melting point of the fusible metal conductor. A ratio of resistance values of the first resistance portion and the second resistance portion is set so that a heat concentration portion of the fuse portion whose temperature is increased by an overcurrent in a rare-short-circuit range is shifted to a part of the first resistance portion which excepts the fusible portion. |
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