Matters needing attention in TVS diode selection

Matters needing attention in TVS diode selection

1. Clearly confirm the maximum DC value, rated standard voltage value and "high-end" tolerance value of the protected circuit;

2. The maximum clamping voltage of 2.TVS diode should be less than the damage voltage of the protected circuit.

3. The rated reverse turn-off voltage of 3.TVS diode should be greater than or equal to the maximum working voltage of the protected circuit;

4. After determining the maximum clamping voltage of TVS diode, its peak pulse current should be greater than transient surge current;

5. The maximum peak pulse power of 5.TVS diode must be greater than the peak pulse power of the protected circuit;

6. Considering the influence of temperature change on the characteristics of TVS diode, TVS diode works between-55 C and 150°C;

7. Most DC protection circuits choose unidirectional TVS diodes, most AC protection circuits choose bidirectional TVS diodes, multi-channel protection circuits choose TVS array devices, and high-power protection circuits choose special protection modules;

8. In the process of using TVS diodes, considering the discreteness of TVS, try to reduce the number of serial/parallel connections.