SA17HE3/73

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TVS (Transient Voltage Suppressor) diodes are a type of special-purpose semiconductor, designed to protect susceptible electronics from catastrophic lightning strikes, power surges, and electrostatic discharges. The SA17HE3/73 is a SMB TVS diode, designed for quick response and rugged operation. With an IEC surge rating of 50A (10/1000 us-waveform) and a total power dissipation rating of 400 W (though note that this is derated with ambient temperature), this diode is capable of protecting sensitive circuits from an impressive range of sudden pressures.

The SA17HE3/73 includes a built-in reverse-biased avalanche diode and two capacitors that are suspended across its terminals. The capacitors are responsible for the diode’s quick response and ruggedness, as they are able to absorb and store a large amount of electrical charge with a relatively low response time. The diode is essentially designed to serve as an electrical barrier between the circuit it’s protecting and the surge. When the capacitors are exposed to a large enough surge, the capacitors will discharge, dissipating the excess energy and preventing the circuit from suffering catastrophic damage.

The SA17HE3/73 is particularly popular in applications where there’s a risk of electrical overvoltages, such as telecommunications equipment, power supplies, computer systems, consumer electronics, and more. In these applications, the diode can be placed across the circuit’s power line in order to protect the components. The diode is designed to handle fast transients, which allows it to provide onboard protection for sensitive components and circuits from a wide range of unexpected and dangerous spikes in voltage. In addition, the diode can also be used in automotive applications as a primary spikes protection device.

The SA17HE3/73 has a wide working range, ranging from -55°C to +150°C, making it suitable for use in a variety of extreme-temperature conditions. Furthermore, its reverse breakdown voltage is between 27-58V, and it boasts a low peak pulse current of 50A. The diode also has an impressive low leakage current of 0.2µA, which is extremely important in keeping the temperature of the system under control.

The SA17HE3/73 is designed to provide superior protection for sensitive circuit components from lightning strikes, power surges, and electrostatic discharges. Its fast response time and low leakage current make it suitable for a wide range of applications, including telecommunications equipment, power supplies, computing systems, consumer electronics, and more. In addition, the diode is capable of providing long-lasting protection in extreme-temperature conditions, making it a perfect choice for automotive applications as well.

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