1N8162US Circuit Protection

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Part Status:	Active
RoHS Status:	RoHS non-compliant

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Introduction:
TVS - Diodes, known as Transient Voltage Suppressors, are special semiconductor devices used to protect electronic circuits from voltage transients induced by external destructive events such as lightning strikes, electrostatic discharges, surges, inductive switching, and other disturbances caused by electrical phenomenon. Specifically, the 1N8162US is a unidirectional (avalanche) diode designed to protect against ESD, surge and load dump events, and typically found in automotive, industrial, telecommunications, and consumer electronic applications. This article will provide a detailed overview of the 1N8162US application field and working principle.

Applications:
The 1N8162US unidirectional (avalanche) diode is typically employed in automotive, industrial, telecommunications, and consumer electronic applications. It is designed to provide superior performance in these fields through its unique combination of low forward voltage, low reverse leakage current, wide operating temperature range, and fast transient response time. In automotive applications, this diode is used for protection from voltage transients induced by external destructive events such as lightning strikes, electrostatic discharges, surges, inductive switching, and other disturbances caused by electrical phenomenon. This can occur during powering-on or powering-off a vehicle, during end-of-line testing, and during vehicle maintenance and repair. In industrial applications, 1N8162US is implemented to protect against voltage fluctuation due to power overloading or sudden high-voltage spikes. It can also be used to protect process controllers, portable instruments, robotics, and other industrial applications from voltage transients that can cause system downtime, and even physical damage.

Working Principle:
At its core, the 1N8162US unidirectional (avalanche) diode functions as an electronic switch, where current only runs in one direction (from anode to cathode). When the diode’s anode-to-cathode voltage exceeds the avalanche voltage (also known as the breakdown voltage), the diode will conduct current in the forward direction and effectively limit the increase in current due to the presence of the reverse voltage threshold. At the same time, the diode will also block the flow of current in the reverse direction surpassing the zener voltage. This is a fundamental property of a diode and allows for the device to perform a number of useful functions such as voltage regulation, power switching, and transient protection. In the 1N8162US diode, the reverse current flow is limited by a soft reverse recovery characteristic (which is beneficial in power switching applications) and a maximum peak reverse current of 0.15 A. This feature helps to reduce the effect of power dissipation and surges which may be induced in the load during transient events.

Conclusion:
The 1N8162US unidirectional (avalanche) diode is an ideal solution for providing superior protection to automotive, industrial, telecommunications and consumer applications from voltage transients induced from external destructive events such as lightning strikes, electrostatic discharges, surges, inductive switching, and other disturbances caused by electrical phenomenon. With its fast transient response time, superior performance, and low-forward voltage, it is well-suited for a variety of applications. This article has provided a brief overview of the 1N8162US application field and working principle.

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