SMPC28A-M3/86A Circuit Protection

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TVS diodes are specialized diodes that protect other integrated circuits (ICs) from electrical overstress (EOS). In this article, we will look at the application field and working principle of the SMPC28A-M3/86A TVS diode.

The SMPC28A-M3/86A is a surface mount diode designed specifically for ESD (electrostatic discharge) protection. It is a multi-layer transient voltage suppressor (TVS) diode capable of suppressing high-speed pulse currents of up to 2.2A with 10/1000μs pulse widths. The diode also features a low clamping voltage of 5.6V for transient suppression, making it ideal for protecting ICs from damage caused by ESD or other electrical overstress such as electrostatic fields, lightning strikes, and transients from powerlines.

The SMPC28A-M3/86A is designed for a variety of applications including consumer electronics, automotive, industrial, military, and medical. Because of its low clamping voltage and fast-acting response time, it is well-suited for use in microprocessor applications where protection from high-speed pulses is required. It is also used in many common applications such as digital cameras, portable electronics, and automotive systems.

The SMPC28A-M3/86A diode has two primary functions: protection from overvoltage and limit inrush current. When an overvoltage event occurs, the diode responds by clamping its voltage so that the voltage at the protected circuit does not exceed the diode’s rated clamping voltage. This helps prevent any damage to the protected circuit from excessive current. The diode also limits inrush current by limiting the amount of current that flows during an overvoltage event, protecting both the diode and the protected circuit by minimizing the rate of power dissipation.

The SMPC28A-M3/86A diode is composed of two layers, the anode and the cathode. When an overvoltage event occurs, the anode charges up to the breakdown voltage of the diode, which then causes the cathode to become forward biased and conducts current. The amount of current conducted is limited by the breakdown voltage. This current then flows through the protection circuit and helps limit the voltage at the protected circuit from exceeding the diode’s rated clamping voltage.

The SMPC28A-M3/86A diode is designed to protect ICs from electrical overstress. With its low clamping voltage and fast-acting response time, it provides an effective solution for protecting sensitive electronics. Its small size enables it to be used in a wide variety of applications, from consumer electronics to automotive, industrial, military, and medical. The diode also helps limit inrush current and protects both the diode and the protected circuit from damages caused by excessively fast power dissipation.

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