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MXLRT100KP85CA application field and working principle

TVS – Diodes, more commonly known as a Transient Voltage Suppressors or TVS Diodes, are designed to provide protection against surges of voltage or electrostatic discharge. The MXLRT100KP85CA from Littelfuse is a low-capacitance diode designed for ESD suppression across a wide range of temperatures and line rates.

Operating Modes

The MXLRT100KP85CA is a Zener diode-like, high-reliability, transient voltage suppressor diode designed to protect sensitive electronic equipment from electrostatic discharge (ESD) and voltage transients. The device modes of operation protect from causes such as lightning-induced transients, inductive switching as well as other phenomenon that can cause transient over-voltages. The device works by providing a “clamping” effect across the line voltage, effectively limiting the peak voltage to a safe level. The device also has a specified temperature range, providing another layer of protection.

Specifications

The MXLRT100KP85CA is certified to meet the requirements of IEC 61000-4-2 Level 4 for electrostatic discharge (ESD). It has a peak power of 100 watts and is rated for working voltage of 5.5 Volts. It has an operating temperature between -55°C and +150°C with a storage temperature from -55°C to +125°C. This device has a low capacitance of 1.5pF and low leakage current of only 100 µA.

Applications

The MXLRT100KP85CA is an ideal solution for providing robust ESD protection for a wide range of low-voltage applications where transient voltages may occur, including consumer electronics, portable electronics, and portable power systems. They are suitable for protecting against ESD pulses, lightning surges, and other transient voltage events. The diode can be used to protect USB ports, data connectors, and other sensitive circuit components. The device is also useful for ensuring reliable performance of sensitive devices in a wide temperature range.

Working Principle

The MXLRT100KP85CA is a Zener diode-like device that works by “clamping” any transient voltages that exceed its maximum working voltage. When an ESD pulse or other transient voltage exceeds the working voltage of the device, the device starts to conduct current and provides a path to ground, effectively limiting the peak of the voltage to a safe level.

As stated above, the device also has a specified temperature range which allows it to remain in a safe “clamping” range regardless of environmental conditions. This ensures that the device will protect against voltage transients even in extreme temperature environments. The low capacitance of the device also ensures that the device is not affected by resonances resulting from high frequency signals, which can also cause voltage spikes.

The MXLRT100KP85CA is a reliable and robust TVS diode designed to provide ESD protection across a wide temperature and line rate range. Its low-capacitance and operational temperature range make it ideal for protecting against voltage transients, lightning-induced transients, and other similar events.

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