What is the difference between one-way and two-way transient suppression diodes — SUNMATE
What is the difference between one-way and two-way transient suppression diodes
Transient suppression diodes have directions, unidirectional and bidirectional, so how to distinguish the directions of transient suppression diodes?
The simple and intuitive method is to look at the surface of components. If there is a cathode line on it, it is a unipolar TVs tube, one-way, otherwise it is two-way; You can also see the model. For the sm830a and sm8s30ca mentioned above, it can be seen that a after the suffix of the model represents one-way and Ca represents two-way. Of course, you can also check the product manual and borrow a multimeter to test!
What is the difference between one-way and two-way transient suppression diodes?
1. The current curve is different: the forward characteristic of unidirectional TVs tube is the same as that of ordinary regulators, and the reverse is PN junction avalanche device; Both the positive and negative sides of the bidirectional TVs are PN junction avalanche devices.
2. The junction capacitance is different: the junction capacitance of unidirectional TVs is larger than that of bidirectional TVs.
3. Applications are different: unidirectional TVs is generally used in DC circuits, and bidirectional TVs is generally used in AC circuits.