P4SMA82

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P4SMA82 is a type of transient voltage suppressor (TVS) diode, used in the protection of electronic circuits from voltage transients caused by inductive load switching, lightning and other high-energy phenomena. It\'s housed in a 4-pin SOD-523 package and has been designed for automated assembly equipment with a low standoff voltage and low capacitance.

The P4SMA82 rating varies from 0.5W to 1W and features unidirectional, bidirectional, and dual bi-directional types. As such, it can handle a variety of voltage spike levels, such as up to 600W peak pulse power for the 1.4W types and 350W peak pulse power for the 0.5W types. Its working voltage ranges from 6 to 180V.

In terms of working principle, the P4SMA82 is designed to clamp the voltage transient at the rated working voltage when it occurs. This is done by using a zener diode and a fast-acting, highly doped avalanche diode. The breakdown voltage of the zener diode is typically set to the working voltage of the device, while the avalanche diode is designed to quickly discharge any excess current when a voltage transient occurs.

The P4SMA82 is capable of protecting a wide variety of electronic components from voltage transients. They are commonly used in low-speed consumer electronics like cell phones, PDAs, and similar devices, automotive electronics, and many industrial and telecommunications applications. In addition, they are often used in power supply modules and on aircraft and space electronics applications.

One of the main benefits of the P4SMA82 is its high effective clamping levels. Because it is capable of handling transients up to 600W peak pulse power for the 1.4W types and 350W peak pulse power for the 0.5W types, it is well suited for a variety of applications. Furthermore, its low profile and light weight make it easy to handle and install. And lastly, its low capacitance and low standoff voltage allow for a more reliable and stable protection.

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