P4SMA27A

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Transient Voltage Suppression (TVS) diode, or TVS for short, is an active surge protection component that is becoming more widely used in embedded systems, whether for data and signal protection or over-voltage protection. The TVS diode helps to protect sensitive circuits against transients, electrostatic discharges, or other voltage fluctuations by absorbing or redirecting the energy to the dissipation system, such as grounding. The P4SMA27A is a TVS diode package designed to protect electrical systems from transient overvoltage.

P4SMA27A is housed in the SMA-2,3A-4 package, which is a surface mount package that features a wide operating temperature range of -65 to +150° C. This allows the P4SMA27A diode to operate in environments with extreme temperature fluctuations. (In contrast, the SMA-2A,3B-4 package features an operating temperature range of -40 to +100° C) The SMA-2,3A-4 package also minimizes board area and increases assembly yields by allowing P4SMA27A to meet Automated Optical Inspection (AOI) requirements and the surface mount assembly methods.

The P4SMA27A TVS diode features a peak power dissipation of 400 watts with an operating current of 30A. Furthermore, the P4SMA27A is designed to dissipate transients with a working voltage between 6.8V and 64V. This wide operating voltage range allows the P4SMA27A to be used in a variety of applications, such as USB ports, peripheral devices, and power supplies.

The P4SMA27A TVS diode works by using an avalanche breakdown principle in order to absorb the transient voltage spike and dissipate it through its drain lead. When a transient voltage is applied across the diode, the voltage will cause the depletion region to expand and increase the electric field, resulting in increased current flow through the diode. This increased current will cause the p-n junction to break down and the diode will automatically shut off, protecting downstream circuitry.

In addition to its voltage spike suppressing capabilities, the P4SMA27A features bidirectional protection. This means that the P4SMA27A can absorb transients from either positive or negative voltage spikes. The P4SMA27A is also equipped with surge protection capabilities to withstand inrush currents as well as ESD (electrostatic discharge) protection, which helps to protect sensitive circuits from transients and electrostatic discharges.

Overall, the P4SMA27A is an ideal TVS diode for applications that require transient voltage surge and electrostatic discharge protection. Its wide operating voltage range makes it suitable for a variety of applications and its bidirectional protection capabilities help to provide effective protection against both positive and negative voltage spikes. The P4SMA27A is also available in a surface mount package with an operating temperature range of -65 to +150° C, making it a great choice for applications in extreme temperature environments.

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