SM15T220CA-M3/9AT

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TVS – Diodes involve the use of Zener diodes, designed to defend delicate electronic circuits from a powerful discharge of static electricity. The SM15T220CA-M3/9AT is a two-channel Transient Voltage Suppressor (TVS) diode with an integrated surge current protection for electronic circuits.

The SM15T220CA-M3/9AT’s applications include Transient Voltage Suppression (TVS) devices and electrostatic discharge (ESD). Transient Voltage Suppression devices are used to protect against overvoltage transients caused by electrostatic discharge, lightning, and inductive loads.

Transient Voltage Suppressor, or TVS, diodes also provide protection to DC voltage power supplies. They provide protection from surges, spikes, high-voltage transients, positive and negative transients, low-frequency oscillations, and EMC pulses. TVS diodes are also useful in applications requiring electrostatic discharge (ESD) protection, because they act as a low-impedance conductor. In addition, TVS diodes are also widely used to protect sensitive electronic components, such as microprocessors, from electrical overshoot caused by static electricity.

The SM15T220CA-M3/9AT incorporates two channels of protection, which are designed to work together to guard against a variety of transient voltages. It is capable of clamping voltages from -14V to +14V across both channels. The device is designed to quickly react to transient voltages and has an operating temperature range from -55СоЇto +150 С with an operating voltage of 5V and a maximum peak pulse current of 44A. It also features a low clamping voltage and low output capacitance, allowing for improved signal integrity.

The working principle of SM15T220CA-M3/9AT is relatively simple, and can be broken down into three stages. The first stage is the initial turn-on stage. This is when the voltage exceeds the zener breakdown voltage and current flows from the anode to the cathode, creating a reverse biased junction. The current is limited by the internal resistance of the diode, which reduces the overvoltage transient. The second stage is the clamping stage, where the energy stored in the diode forward bias junction is released, clamping the voltage between the anode and cathode to a predetermined level. This also limits the power leakage from the device, ensuring optimal protection. The third stage is the turn-off stage, where the diode turns off and the voltage is limited to the reverse breakdown voltage.

The SM15T220CA-M3/9AT is ideal for applications requiring an effective, reliable, and low-cost surge protection solution. The device offers fast-acting protection for electronic circuits in a wide range of transient voltages and current levels, making it an excellent choice for numerous applications. It’s also designed to work with both voltage and current limiting devices, for a comprehensive protection solution.

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