PESD1NFC-SFYL Circuit Protection

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TVS diodes provide effective protection against extreme events such as lightning, electrical transients, or electrostatic discharges. The PESD1NFC-SFYL, which stands for “Passive Electrostatic Discharge Protection Diode”, is a TVS diode developed for use in high-voltage applications. It has been designed for a wide range of applications where an IEC certified device is required, and is suitable for applications from 24 volts to several hundred kilovolts.

The PESD1NFC-SFYL is a non-linear device that works by clamping voltage surges and spikes to safe levels. It functions by diverting the current flow away from sensitive electronic components and quickly discharging any accumulated static electricity to ground. Its clamping voltage is adjustable, allowing for greater flexibility when designing protection circuits.

The PESD1NFC-SFYL is constructed using three layers of glass epoxy laminate. The first two layers are nickel-plated layers with a polyester resin core to prevent corrosion. The third layer is an eutectic gold plated Thalamic Zener diode (AZD) to provide current protection. The AZD functions as a reference point, ensuring that the clamping voltage is reliably held to the desired voltage.

The PESD1NFC-SFYL is designed to respond quickly to transients and operate over a wide temperature range of -40°C to +85°C. It has excellent thermal and electrical stability, allowing it to provide robust protection from extreme voltage transients. It is rated for a maximum clamping voltage of several hundred kilovolts and requires a minimum standing voltage of 24 volts.

The working principle of the PESD1NFC-SFYL TVS diode can be best summarized by the following sequence of events. When a transient voltage of 24 volts or more is applied, the AZD begins to conduct current. This causes the voltage to drop, as the AZD diverts current away from the connected components. As the current is diverted, the voltage is clamped at a safe level, protecting the connected components from damage.

The PESD1NFC-SFYL is an ideal solution for high-voltage applications where long-term reliability and protection from transients is required. With its adjustable clamping voltage, wide temperature range, and excellent electrical and thermal stability, it allows for enhanced design flexibility when it comes to protecting vulnerable circuits.

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