Improved response of TVS and PIN diode combined electromagnetic protection

To combat the interference and damage caused by external EMP, TVS and PIN diodes, two common electromagnetic protection components, are frequently used together. However, in practical applications, it is found that the PIN diode in the combined protection circuit is turned on first and TVS does not play a role. This study examines this phenomenon using the TVS-TVS3V3L4U and PIN diode-SMP1320. The findings indicate that adding capacitance and resistance between the TVS and PIN diode can successfully solve the problem. The findings of this study have some reference value for powerful EMP protection.