SA20AHE3/73 Circuit Protection

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The SA20AHE3/73 is a bi-directional transient voltage suppressor (TVS) diode. It has a working voltage range of 5.0V to 73V, and normal operating current of 10A (maximum peak current of 25A). In addition to having four diode configurations, the device also has a wide temperature range of -55°C to 150°C, making it well-suited for high-temperature environments.

The purpose of the SA20AHE3/73 is to clamp the voltage on either side of the diode to protect any sensitive electronic components. This is done by having a pair of diodes in series, with each diode able to conduct a different type of current. The forward diode is responsible for passing normal operating current, while the reverse diode is responsible for clamping overvoltage and transient voltage. This allows the device to protect against electrical transients and surges, as well as reverse breakdown.

The SA20AHE3/73 is primarily used in mobile phones, automotive systems, and other consumer electronic devices. It is often used to provide protection against electrical transients and overvoltage, and to extend the lifetime of sensitive components by absorbing the electrical transients and surges. The device is also useful for applications which require a high-temperature diode.

The working principle of the SA20AHE3/73 is simple. When the normal operating voltage is applied to the device, the forward diode allows the current to flow and the reverse diode blocks it. However, if an overvoltage, electrical transient, or surge passes through the diode, the reverse diode becomes conductive and clamps the voltage. This prevents the overvoltage from reaching the connected components and reduces the risk of damage.

In summary, the SA20AHE3/73 is a bi-directional TVS diode with a wide operating voltage range, high temperature range, and four diode configurations. It is primarily used in mobile phones, automotive systems, and other consumer electronic devices to provide protection against electrical transients and surges. The working principle of the device is simple: the forward diode passes the normal operating current, while the reverse diode clamps overvoltage and transient voltage.

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