PACDN004SR

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The PACDN004SR is a type of TVS diode, and is specifically designed to protect sensitive electronic equipment from high-voltage and electrostatic discharge (ESD). It is a unidirectional diode designed for overvoltage protection applications and can handle up to 40V with a response time less than 1ns. It has an ultra-low capacitance of 0.2 pF for superior protection against fast transients.

The most common application of the PACDN004SR is in portable electronics such as mobile phones and laptops, where it is used to protect the delicate components from ESD and high-voltage pulses created by electromagnetic fields. It is also widely used in car engines, where the diode is used to protect the delicate electronic components from high-voltage pulses created by the car’s alternator.

The working principle of the PACDN004SR is based on avalanche breakdown. When a high voltage is applied to the diode, the electric field across the diode junction exceeds the breakdown voltage and the electrons accelerate towards the anode by multi-level tunneling. This creates a large number of electron-hole pairs, which in turn causes the current in the diode to increase rapidly. This current is known as the avalanche current.

The PACDN004SR diode has a threshold voltage rating of approximately 35V, meaning it is triggered only when a voltage of around 35V is applied across its junction. The diode has a low forward voltage rating, allowing it to remain “on” even at high temperature and low voltage. Once triggered, the diode quickly clamps the applied voltage and the current flow is diverted away from the protected component.

The PACDN004SR also has a high surge current capability and is capable of withstanding up to 4kA of surge current without sustaining damage. This makes it ideal for protecting delicate components from overvoltage and ESD. In addition, the diode has an ultra-low capacitance of 0.2 pF which is suitable for protecting against fast-risetime transients, making it perfect for protecting sensitive circuits and components from high voltage.

The PACDN004SR is thus widely used in a variety of applications, such as mobile phones and laptops, engine control systems, industrial controllers, and automotive systems, and is ideal for providing protection from overvoltage and ESD, as well as fast risetime transients.

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