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周围温度上升或者电流异常放大使动触片发热并达到规定温度时,将引起双金属片反转,抬升动触片,使触点部弹开,断开电路。电路断开后,其内部的陶瓷PTC发热,使其保持断开状态。应用于手机、笔记本电脑、游戏机、PO55机等移动终端锂电池保护器。
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