SA18CHE3/73

TVS - Diodes are highly versatile electronic components with lots of uses. The SA18CHE3/73 is an example of one such device. This article will explain the application fields and working principles of the SA18CHE3/73.

The SA18CHE3/73 is a series of diode arrays with overvoltage protection capability. It is designed to protect semiconductors from static discharges, lightning strikes, and other transient overvoltage events. It is commonly used in automotive electronics, telecom equipment, computer peripheral, industrial control equipment, consumer electronics, and other sensitive electronic devices.

The working principles of the SA18CHE3/73 can be broken down into two sections: clamping action and sourcing action. The clamping action occurs when the device senses an over voltage, or when it is exposed to a current surge. It immediately conducts the surge current to ground, suppressing the surge or clamping the voltage. The sourcing action is when the device is exposed to negative, or reverse polarity, transient events. In this case, the device automatically starts sourcing current as quickly as possible, dissipating the energy of the transient event.

The primary application fields for the SA18CHE3/73 include protection from ESD, EFT, and lightning surge. In ESD protection, the device is used to protect against static discharges or electrostatic pulses. In EFT protection, the device is used to protect against fast transient events, such as those created by an electronic surge. Finally, in lightning surge protection, the device is used to protect against high-amplitude and high-duration transient events caused by lightning strikes or other international power cords.

To ensure proper protection, it is important to select the right type of SA18CHE3/73 for the application. Factors to consider include the voltage rating, current rating, frequency response, and surge capacity. Additionally, for applications requiring overtemperature protection or surge current protection, leaded versions of the device may be available.

In conclusion, the SA18CHE3/73 is a versatile diode array with a wide range of applications. When used correctly, the device can provide protection from static discharges, fast transients, and lightning strikes. Selecting the right version of the device is important for proper protection. Therefore, it is important to understand the application field and working principles of the SA18CHE3/73 before selecting one.