Protection devices of maximum current steady and cut-off electric circuit avoid further damage of failure phone circuit board.
最大电流恒定及截止式电路保护装置，免除故障手机线路板进一步损坏。
The packaging materials and processes of positive temperature coefficient (PTC) devices made up of the composite of polyethylene and carbon black(PE/CB) for over current protection were studied.
用环氧和有机硅树脂涂料对由聚乙烯／炭黑（PE／CB）制备的正温度系数（PTC）电路保护元件的表面处理及其工艺进行了研究。
The IGBT pairs and protection devices are selected such that either pair alone can interrupt the current safely.
IGBT的保护和对设备的选择等，要么便可以中断对当前的安全。
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