TPC18AHM3_A/I Circuit Protection

TPC18AHM3_A/I is a TVS-diode (Transient Voltage Suppressor) which is a special type of diode designed to reduce damages caused by electrical jumpers and surges. This device is widely used in electronic dispatching systems, power tools, automotive exhaust systems, and military and aerospace applications. It has a wide range of operating voltages, operating temperatures, and diode capacitance.

Application Field

TPC18AHM3_A/I is most commonly used in a variety of applications which require the protection of electronic devices and systems from high-voltage transient events. Examples of these applications include aerospace and military operations, automotive exhaust systems, and consumer electronics. In the automotive industry, TPC18AHM3_A/I has been used in exhaust systems to aid in controlling the emission of pollutants and noise, as well as in fuel pumps and injectors to prevent fuel system degradation due to overexposure to electrical surges.

In consumer electronics, the device is commonly used as an overvoltage protection device in power supply lines, surge arrestors, and surge protectors. In the military and aerospace industries, the device is used in a variety of applications, such as rocket propulsion systems, communication systems, and missile guidance systems. In addition to these applications, TPC18AHM3_A/I has also been used in test and measurement equipment, security systems, medical equipment, and power supplies.

Working Principle

The TPC18AHM3_A/I works by providing electrostatic and thermal protection against high voltage transients. When a high voltage transient event occurs, the device\'s zener diode breaks down, limiting the voltage across it by providing a low impedance path. This path, however, is not strong enough to handle the overload of current without failing, and this is why the TPC18AHM3_A/I is equipped with a parasitic thyristor. The thyristor provides a additional low-impedance path that can safely handle the fault current.

In addition, the device provides thermal protection by using a positive temperature coefficient heat dissipation mechanism. When the device is subjected to an overvoltage transient, the device\'s thermistors are activated, releasing thermal energy, which helps to dissipate the energy and protect other components from damage. This helps to reduce the risk of component failure due to overvoltage.

Conclusion

The TPC18AHM3_A/I is a versatile TVS diode that can be used for a variety of applications. This device provides electrostatic and thermal protection against high voltage transient events, allowing it to help protect electronic components from damage due to electrical surges. As such, it is an important component in a variety of applications, ranging from the automotive industry to the military and aerospace industries.