SMCJ14ATR Circuit Protection

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TVS Diodes are increasingly being used in the electronics industry, primarily as surge protection devices. One such device is the SMCJ14ATR, a unidirectional surface mount transient voltage suppressor diode. It is designed to protect sensitive electronic equipment from voltage surges and electrostatic discharges. The SMCJ14ATR is a two-lead device which comes in a compact SUS package. It has a low body leakage current, and is suitable for use in high-ambient temperature, as well as high-speed switching circuits. The device is designed to protect against over-voltage transients for both AC and DC power supplies. It is also effective in providing protection against ESD, EFT and lightning.

The main application field of the SMCJ14ATR are communication equipment, computers, consumer electronics and office machines as well as power supply applications. It offers excellent protection performance and a long life expectancy of up to 10 years.

The working principle of the SMCJ14ATR is based on the avalanche breakdown effect. This effect allows the diode to effectively suppress voltage transients and reduce the current flowing through the device. When the voltage across the diode reaches to its breakdown voltage VBR, a sharp increase in the current through the diode occurs. This avalanche effect generates a large stored energy in the device. The device then acts as a voltage clamp, absorbing the high-frequency or surge energy and limiting the voltage at the given breakdown voltage.

The SMCJ14ATR has a wide operating range, from 5 volts to 14 volts with a breakdown voltage of 13 volts. The peak pulse power it can dissipate is 1500W, and the peak pulse current is 33A. It has a voltage rating of 14V, and a maximum leakage current of 250uA. It has a very low capacitance of only 80pF, and is well suited for use in high-speed circuits.

In conclusion, the SMCJ14ATR unidirectional transient voltage suppressor diode is an effective and reliable surge protection device suitable for a wide range of applications. Its avalanche breakdown effect provides excellent protection against over-voltage transients, ESD, EFT and lightning surges. It has a low body leakage current, wide operating range and a long life expectancy which make it an ideal choice for high-ambient temperature and high-speed switching applications.

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