LCE20A-E3/54

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TVS diodes can be used in many applications to protect circuits and equipment from damage caused by transient voltage. The LCE20A-E3/54 is one such example of a TVS diode that has a wide variety of uses. In this article, we’ll take a closer look at some of its possible applications, as well as explain the working principles behind the device.

Application Field

The LCE20A-E3/54 is designed for applications where transient voltage suppression is required. It is a bi-directional device, meaning it can be used to protect a circuit from both direct and indirect voltage spikes. It is also rated for up to a maximum specified clamping voltage, making it suitable for high-voltage applications. Common applications for the LCE20A-E3/54 include telecommunications, servers, and various automotive and consumer electronics.

Working Principle

How exactly does the LCE20A-E3/54 achieve its protection? As the name implies (TVS), a transient voltage suppressor is a type of diode specifically designed to clamp or reduce undesirable voltage spikes. The device operates by utilizing a special p-n junction whereby when the voltage across the diode reaches a certain threshold level, an avalanche breakdown occurs which creates a large number of electron-hole pairs. These additional charge carriers then help to conduct current away from the circuit, thus preventing a large voltage spike from occurring.

In some cases, a TVS diode may be designed to latch. This is a special feature that would be enabled if the threshold voltage is exceeded (such as in a surge event). In this instance, the diode would remain closed until the current is manually reset by the user. This added feature can be beneficial for applications where a long-term, sustained surge protection is needed.

The LCE20A-E3/54 has a maximum reverse surge current rating of 18 amps (8/20µs pulse) and an IEC 61000-4-5 current rating of 30 amps (8/20µs pulse). The operating temperature range is -50 to +175°C, making it suitable for use in industrial and extreme environmental conditions. The unit has a peak pulse power rating of 900 watts, and a clamping voltage of 58 volts (6.2v - 40a).

Conclusion

The LCE20A-E3/54 is a robust TVS diode designed to protect circuits from transient voltage events. It has an operating range of -50 to +175°C, a peak surge current rating of 18 amps, and a peak pulse power rating of 900 watts. With its wide range of applications, the LCE20A-E3/54 is an excellent choice for preventing damage caused by overvoltage.

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