P4KE82CA-E3/73 Circuit Protection

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A TVS diode, also known as a Transient Voltage Suppressor diode, is an electronic protection diode designed to protect against electrical overstress caused by external influences such as electrostatic discharge, lightning, and various other electrical surges. The P4KE82CA-E3/73 is a TVS diode belonging specifically to the ESD (electrostatic discharge) protection product series.

This particular diode is a non-polarized unidirectional three-terminal ESD protection diode in a SOD-323 package. It is based on transient voltage suppressors with anti-parallel avalanche diodes, for the automatic protection of sensitive electronics against electrostatic discharge. Its maximum peak pulse power is 8.2 kV as per the UL1449 Third edition.

The P4KE82CA-E3/73 is ideal for a range of applications due to its simple implementation and reliable electrostatic discharge protection characteristics. Common applications include protection against ESD, lightning, and inductive switching surges. It is well suited for sensitive electronic equipment such as cameras, mobile phones, computers, automobiles, and consumer electronics. It is also used in consumer products, healthcare equipment, automotive electronics, industrial systems, and telecommunications systems.

The construction of the TVS diode includes a junction, which consists of two p-type semiconductor material layers and one n-type. The p-type semiconductor layer forms the anode, while the n-type semiconductor layer forms the cathode. A reverse biasing voltage is applied across the diode which is kept below the avalanche breakdown voltage of the diode. A major component in the figure is inside the Schottky diode structure is the avalanche region, where electrons and holes combine resulting in increased current.

When an electrostatic discharge or other surge is applied to the diode, the surge voltage exceeds the avalanche breakdown voltage of the diode, and the electrons and holes start to avalanche in the junction region, and current starts to flow. The current flow leads to a voltage drop across the diode, thus limiting the voltage across the diode and providing malfunction or damage protection to the device.

The P4KE82CA-E3/73 provides up to 8.2 kV ESD protection in a SOD-323 package, featuring a 500-W peak pulse power capability at 10/1000 μs, for both unidirectional and bidirectional protection. This device provides superior peak power capability, low leakage current, and fast response time to provide reliable performance and protect vulnerable electronics from overstressing.

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