SA54CHE3/73

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TVS diodes are a kind of protective semiconductor device which is designed to protect sensitive electronic components from voltage transients. They come in many different styles and sizes, from the small SA54CHE3/73 series to large high-voltage surge protectors.

The SA54CHE3/73 series TVS diode is a small unidirectional diode designed to protect sensitive electronic components from overvoltage transients. This diode is composed of a sensitive zener element and an active TVS element connected in series. The zener element provides clamping for the transient positive voltage while the active transistor element provides clamping for any negative transient voltage. The combination of these elements allows the diode to absorb and clamp both positive and negative transient voltages that occur in an electronic circuit.

The TVS diode has a broad range of application fields, particularly in consumer electronics. Most common consumer electronics devices, such as smartphones, cameras, laptops, televisions and many more, are protected with TVS diodes. Some automotive components, such as car audio systems, are also protected with TVS diodes. Other application fields may include power supplies, TV reception, and data communications.

The working principle of a TVS diode is based on the conduction of the diode itself. When the diode is ‘on’, the current conducted by it is limited by the internal impedance of the diode. This limits the amount of current that can flow through the diode, hence protecting the circuit from any overvoltage transients. When the voltage across the diode exceeds a certain value (known as the ‘clamping voltage’) the diode will clamp the excess voltage, thus protecting the circuit from the overvoltage transient. The TVS diode will then quickly recover to its original state when the transient is over.

The SA54CHE3/73 TVS diode is a great choice for protecting sensitive electronic components from overvoltage transients. It is a small, unidirectional diode which provides both clamping for positive and negative voltage transients. This diode has a broad range of applications and works on the principle of conduction current limiting.

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