Transient voltage suppressor, abbreviated as TVS, is a high-efficiency protective device in the form of a diode. When the TVS diode is subjected to transient high-energy impact, it can quickly respond (in the order of P seconds) to transform the high impedance between its two poles into low impedance, absorb surge power of up to several kilowatts, stabilize the voltage between the two poles at a safe value, and effectively protect precision components in electronic circuits from damage caused by various surge pulses such as static electricity and transient high voltage

TVS has the advantages of fast response speed, high transient power, low leakage current, small breakdown voltage deviation, easy control of clamping voltage, no damage limit, and small size. It is a new type of high-efficiency circuit protection device widely used in the industry, which helps to improve the anti-static/anti surge current capability of the entire system. Its downstream application market is very extensive, including consumer electronics, home appliances, security, network communication, industrial equipment, automotive electronics and many other fields, with a large market space. The domestic TVS diode market size in 2022 is 7.296 billion yuan

Looking back at the development history of TVS, with the continuous development of downstream industries, in order to ensure product performance stability, the market's quality requirements for circuit protection components are constantly increasing. Integrated circuit chips are showing a trend of miniaturization, with narrower line widths, and the pursuit of higher integration and lower operating voltages. This has made integrated circuit chips more sensitive and easily susceptible to static electricity and surge impact, causing damage. As a result, the technical threshold for TVS is constantly increasing

The ordinary TVS diode with a single PN node structure and simple process can no longer meet the new requirements for anti-static and surge protection in the development of integrated circuit chips due to limitations in performance, accuracy, sensitivity, etc. Therefore, new types of TVS for ESD (electrostatic discharge) protection with characteristics such as small leakage, low clamping voltage, fast response time, strong anti-static ability, and surge protection have been developed and continuously innovated and upgraded in the past decade

Compared to ordinary TVS diodes, ESD protection devices require higher structural design and process requirements, and have more complex structures. They are generally designed as multi-channel PN junction integrated structures, using multiple epitaxial, double-sided expansion or trench designs. ESD protection devices can ensure effective protection for miniaturized integrated circuit chips, representing the current technological level and development direction of TVS

The application fields of TVS/ESD protection devices are extensive. With the promotion of 5G infrastructure and markets such as 5G mobile phones, electric vehicle charging stations, reverse radar, PCs, and industrial electronics, it is expected that TVS/ESD protection devices will experience significant growth