Introduction

The SA60CHE3/73 is a Transient Voltage Suppressor (TVS) Diode used to protect sensitive electronic components from unacceptable voltage spikes. Coming in a wide range of models, this particular TVS diode has a number of different characteristics to take into consideration. This article outlines the application field and working principle of the SA60CHE3/73.

Application Field

The SA60CHE3/73 diode is a provider of comon-mode protection, using electrostatically charged layers of polymeric material to protect sensitive components from transient overvoltages. They find use in multiple electronics systems, in particular those found in cars. Due to the need to protect expensive components from high transients, the SA60CHE3/73 is useful for replacing worn out or faulty Electronic Control Units (ECUs) at lower cost, or even controlling the electrical conditions that could cause degradation or destruction. Other areas of application could include computer network equipment, communications hardware, domestic appliances and many other areas of electronic goods where protection from voltage surges is needed.

Working Principle

TVS diodes protect against overvoltage by clamping to a particular voltage level. The SA60CHE3/73 is no exception. It contains two layers of polymeric material, which are charged with the same electrostatically-based characteristics. In normal operating conditions, the voltage potential between the two layers is low, meaning that current flows unimpeded through the device. During a voltage spike, the potential between the two layers increases, leading to the "breakdown" of the junction. This breakdown causes current to be diverted away from the protected part, and dissipated as heat. Once the overvoltage event has concluded, the two layers return to their original state, and normal operation is resumed.

Conclusion

As a TVS diode, the SA60CHE3/73 provides essential protection to many types of electronics. It finds use in automotive systems, where protecting expensive ECU\'s is paramount; and other areas where protection from voltage transients is necessary. The device works by having two layers of polymeric material charged with the same electrostatically-based characteristics, which become "broken down" during a voltage spike, diverting current away from the protected part. By doing this, the device, as well as the components it protects, will remain intact and functional in the long term.