What's the difference between ESD and semiconductor discharge tube?

ESD (Electrostatic Discharge Protection Device), also known as TVS array, is a multi-channel or single-channel ESD protection device with specific functions, which is mainly used for electrostatic protection of various communication interfaces. Such as USB, HDMI, RS485, RS232, VGA, RJ 1 1, RJ45, BNC, SIM, SD and other interfaces. ESD protection devices are packaged in various forms, ranging from single-channel SOD-323 to multi-channel SOT-23, SOT- 143, SOT-23-6L, SOIC-8, QFN- 10, etc. Circuit design engineers can choose ESD protection diodes in different packaging forms according to circuit board layout and interface type.

Semiconductor discharge tube, TSS(Thyristor Surge Suppressors), also known as surge suppression thyristor, is a four-layer structure device of PN junction made by semiconductor technology. Its volt-ampere characteristics are similar to those of thyristor, and it has typical switching characteristics. Parallel connection is generally used in the circuit. Under normal working conditions, the semiconductor discharge tube is in the off state. When abnormal overvoltage occurs in the circuit due to induced lightning and operating overvoltage, the semiconductor discharge tube is quickly turned on to discharge the abnormal overcurrent caused by abnormal overvoltage, thus protecting the back-end equipment from being damaged by abnormal overvoltage. After the abnormal overvoltage disappears, the semiconductor discharge tube returns to the off state. ?