What are the most commonly used models of TVS tubes?

The junction capacitance of TVS tubes can be roughly categorized into two types according to the manufacturing process, high junction capacitance type TVS is generally in the order of magnitude of a few hundred to a few thousand pF, and low junction capacitance type TVS junction capacitance is generally in the order of magnitude of a few pF to a few tens of pF. Generally the junction capacitance of discrete TVS is higher, and both types are found in surface-mounted TVS tubes. In the protection of high-frequency signal lines, TVS tubes with low junction capacitance should be mainly used.

Examples:

1) low-voltage DC power supply protection, commonly used SMBJ15CA, SMBJ18CA, SMBJ24CA, SMBJ36CA, SMBJ58CA

2) signal interface protection. Commonly used SMBJ6.5CA, SMBJ15CA, LT-BV15C, TVS-BV24C