SMCJ120

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Transient Voltage Suppression diodes (TVS) are a form of protection used in various applications. The SMCJ120 diode is a type of Transient Voltage Suppression (TVS) diode, used to protect the devices from different transients. It is a low leakage, ultra-low capacitance diode. This diode can handle large voltage and energy spikes. It provides effective protection against voltage and current spikes, and helps in reducing the power losses caused by such transients.

The SMCJ120 has a peak working voltage of 120V and a breakdown voltage of 140V. It has a very low leakage current of 1 μA typical at a nominal working voltage of 120V. The SMCJ120 is available from several manufacturers, with price varying between 1 dollar and 20 dollars. It is used for applications where spikes need to be limited and dissipated in the short period of time.

The SMCJ120 can be used in various applications that require protection from spikes. These include power supplies, switch mode power supplies, inverters, motor drives, and digital circuits. It is ideal for protecting devices from transients due to short circuit and over voltage conditions. It also works well in applications that require protection from ESD (Electro-Static Discharge).

The working principle of the SMCJ120 is based on the avalanche effect. It has a very small junction capacitance, which is very important for providing protection against transients. When a voltage spike or a current spike occurs in the circuit, it causes the diode to avalanche, that is, to conduct large currents through the diode. This current causes the junction capacitance to drain, thereby dissipating the energy from the circuit and thus protecting the circuit and the device from damage.

The SMCJ120 is also available with other features, such as ESD protection, over-voltage and over-current protection, and surge protection. It can also handle high-voltage/high-energy pulses, such as those encountered in automotive and military applications.

The SMCJ120 is a highly reliable and efficient form of protection against voltage and current spikes. It is designed to provide the best protection against transients, and is suitable for a variety of applications. Its small junction capacitance makes it an ideal choice for protecting circuits and devices from the damage due to transients.

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