SMDJ22C

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TVS - Diodes are semiconductor devices used to protect electrical circuits from damage due to overvoltage transients. They are also commonly referred to as a Transient Voltage Suppressor (TVS) or a Transient Voltage Surge Suppressor. The SMDJ22C is a TVS diode designed for applications such as overvoltage protection for data communications lines and other types of high speed devices.

The SMDJ22C is a surface mount diode with a 2.2mm lead spacing, making it ideal for use in space-constrained applications. It has a maximum breakdown voltage of 22V, which helps protect against surges of up to 14.2V when connected in series with a 5"V tolerance resistor. It also features a low capacitance of 1.1pF, making it suitable for use on high speed data lines, such as USB 3.0. The device is also RoHS compliant, which makes it suitable for use in a variety of applications.

The SMDJ22C works by utilizing a Zener diode to provide overvoltage protection. A Zener diode is a type of diode with a reversed breakdown voltage, and when the voltage across it exceeds its specified breakdown voltage, the diode begins to conduct current. This current is then dissipated as heat, effectively clamping the voltage of the circuit down to a safe level. This clamping action helps protect delicate electrical components from damage due to power surges.

In addition to overvoltage protection, the SMDJ22C can also be used for clamping down signal current to prevent noise interference. This is done by using a series resistor, which reduces the signal current going into the device. When the current exceeds the series resistor value, the device begins to conduct, clamping down the signal and reducing any possible interference.

The SMDJ22C provides an economical solution for overvoltage protection, signal noise reduction, and other applications. It is also suitable for use in high speed data lines, making it a cost-effective solution for many applications. Due to its small size, it can be used on space-constrained PCBs without requiring additional space for installation. Its low capacitance helps reduce any signal interference and ensures that the signal is maintained at a constant level over time.

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