I've seen power protection that uses:
- MOV (metal-oxide varistor)
- Inductor
- TVS diode
Application Note: Transient Voltage Suppressors (TVS Diode)
Applications Overview
I didn't see any design guide for the inductor selection, so I choose 1 A inductor 4.7 µH. But doesn't that mean it will carry the surge current that TVS should clamp?
I'm not sure if 4.7 µH the right selection or not.
Best Answer
Inductance value will be depends on the surge rise time and TVS clamping time. Current rating will depend on the MOV breakdown time and the energy of the targeted surge.