Folded electrical characteristic TVS diodes

Folded electrical characteristic

1. The V-I characteristic of unidirectional TVS is the same as that of ordinary zener diodes. The reverse breakdown inflection point is approximately "right angle", which is a hard breakdown. It is a typical PN junction avalanche device. The curve corresponding to the breakdown point to the Vc value indicates that when there is an instantaneous overvoltage pulse, the current of the device increases sharply while the reverse voltage rises to the clamping voltage value and remains at this level.

"The V-I characteristic of bidirectional TVS. The V-I characteristic curve of bidirectional TVS is like a" back to back "combination of two unidirectional TVS, with the same avalanche breakdown characteristics and clamping characteristics in both positive and negative directions. The symmetric relationship between the positive and negative breakdown voltages is: 0.9 ≤ V (BR) (positive)/V (BR) (negative) ≤ 1.1. Once the interference voltage applied to both ends exceeds the clamping voltage Vc, it will be immediately suppressed, making bidirectional TVS very convenient for application in AC circuits.".