▄ 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 TVS
 As a secondary protection, it can be applied to high frequency transmission occasions.

Device selection reference:
GDT: 2R090TA-5/8
PPTC: JK250-145U
TVS: SMBJ5.0CA 

▄ 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:
SMBJ5.0CA or ESDA6V1L.