▄ Solution 1: It is a protection solution for the harsh application environment. 
 Using this program, the line can withstand large surges, fast bursts, and static electricity. The program uses a triple protection mode and uses low capacitance to protect TVSAs a secondary protection, it can be applied to high frequency transmission occasions.

Device selection reference:
GDT: SPA090F
PPTC: MSM020: 

TVS: PSOT05LC or SLVU2.8 

 ▄ Scheme 2: It is a general protection scheme. 
This scheme only protects fast pulse groups and static electricity, and does not provide good protection against strong surges.

Device selection reference:

PSOT05LC, GBLC05, SRV05-4 (4-channel protection), SLVU2.8