TPC18HM3/87A

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TVS (transient voltage suppressor) diodes are semiconductor devices to limit and control voltage, current, power, or other electromagnetic signals while providing protection to circuits from electrostatic discharge (ESD), electrical transients, surges, and other disruptions. Highly reliable and efficient, these devices provide a quick response to voltage spikes, thus protecting delicate circuitry and potentially saving outputs. The TPC18HM3/87A is a high-speed, low-capacitance, uni-directional diode array designed for ESD protection of data lines in accordance with IEC 61000-4-2, IEC 61000-4-4, IEC 61000-4-5, and Telecommunications. The TPC18HM3/87A is designed to protect against transient voltages of up to 22kV (contact discharge) and is available in a SOT-23 surface-mount package, making the device a good choice for a wide range of industrial and consumer applications. The device is also backward compatible with existing 5V TLPs, providing both ESD and EFT protection. It comes with a 25mA clamping voltage of 5.7V, making it suitable for 5V systems.The device consists of two back-to-back zener diodes connected in series, and two at the outputs as protection from EFT or surge events. The device includes two proximity capacitors, one to the input and the other to the output, for EMI/EMC filtering. The two zener diodes limit the voltage at the inputs and outputs of the device. During a surge event, the two zener diodes absorb the surge energy and keep the device in safe operation.The working principle of the TPC18HM3/87A is relatively simple. When the circuit is subjected to a transient voltage, the zener diodes are activated to limit the voltage. This activation occurs in two ways: first, when the surge voltage exceeds the clamping voltage, the zener diodes will activate and limit the voltage. Second, the proximity capacitors will absorb the surge energy and keep the device in safe operation. The TPC18HM3/87A has many potential applications due to its small size and low capacitance design. It can be used for a variety of data processing and communication applications, such as computer peripherals, modems, digital TVs, and other electronic devices requiring ESD protection. It is also suitable for military, aerospace, automotive, and industrial applications due to its high surge capability and wide operating temperature range. In conclusion, the TPC18HM3/87A is a highly reliable and efficient device for protecting circuits from transient voltages. It is available in a surface-mount package, allowing it to be used in a wide range of applications. Moreover, its two zener diodes provide the circuit with the necessary protection from both ESD and EFT in a safe and efficient manner.

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