breakover

If the voltage exceeds a critical limit (breakover voltage), the device switches into conduction.

当电压超过临界极限（即导通电压）时，该件导通。

From the cabin to the cabin outside, its key technologies is to the outer space environment adaptation, thus guarantee circuit's breakover.

从舱内到舱外，其关键技术是对太空环的适应从而保证电路的导通。