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TB2300L-13 Application Field and Working Principle

TB2300L-13 is a thyristor module in TVS (Thyristor controlled Series) category, with remarkable properties and excellent performance even at high temperatures and high current ratings. It is designed as a replacement for arc-less vertical thyristors. This module provides reliable protection against overvoltage and overloads, and is an ideal choice for high power electronics applications in the field of industry-controlled appliances.

Application

TB2300L-13 module is especially suitable for the control of electric loads in series connection, such as AFCI, solar inverters, HVDC, photovoltaic systems, UPS, electric automobiles, as well as other industrial-grade electrical appliances. This module is also commonly used in medical care equipment, computer centers and network communication systems, with excellent protection properties for the devices and system.

Working Principle

TB2300L-13 module is composed of a main thyristor, a bypass thyristor, resistors, capacitors, gate drive circuits, and other components, as shown in Figure 1. In normal operation, the current flows through the main thyristor, and the bypass thyristor remains in the off state. When an abnormal surge current flows through the main thyristor, the bypass thyristor conducts the current, so that the current can be quickly dismissed and the power losses can be drastically reduced.

When the surge current passes through the main thyristor, the voltage drop across the main thyristor appears almost immediately due to its large impedance. The voltage drop triggers the bypass thyristor, and then the current is diverted to the low-impedance bypass thyristor instead of the high-impedance main thyristor. Thus, the current through the main thyristor is reduced to a safe level, and the junction temperature is prevented from reaching a high level and causing damage to the module.

As the surge current is quickly diverted to the bypass thyristor, the power dissipation is drastically reduced, effectively extending the life of the module. The bypass thyristor opens when the surge current disappears, and the bypass thyristor is ready for the next surge event. After each surge event, the module returns to its normal operation.

Conclusion

TB2300L-13 module is an excellent choice for applications requiring reliable protection from overvoltages and overloads. With its bypass thyristor, it can quickly respond to abnormal current and divert the surge current, significantly reducing the power dissipation. This module is an economic solution for high power applications, with excellent performance even at high temperature and current ratings.

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