SMDJ120

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TVS - Diodes are one of the most important components that are used in electrical and electronics systems. The SMDJ120 is a popular and widely used unidirectional, bidirectional and dual bidirectional TVS diode. It is used across a wide range of applications in both the consumer and industrial markets.

The SMDJ120 is a device used primarily to protect high-value, high-frequency, very low impedance components from ESD, EMI, EFT and other transients associated with power disturbances. These disturbances, which can occur from lightning and other power disruption sources, can damage expensive equipment by short-circuiting their outputs to the power supply ground line. The SMDJ120 helps protect these components by being placed between the power supply lines and the input port of the sensitive component.

The SMDJ120 has a low-capacitance bidirectional transient-voltage-suppression design, meaning it can operate over a wide range of impulse voltages from ±5 volts to 90V. It maintains several operational parameters including a standby voltage, clamping voltage, holding current, impulse current rating, capacitance, and response time. All of these parameters contribute to the diode\'s ability to withstand transient voltages.

Specifically, the SMDJ120 works by clamping or limiting the peak voltage between the power and ground line, to a safe level. The holding current is the maximum amount of current that this diode can safely pass through it during normal operation. This way, the voltage and current never exceed the diode\'s rated values, thus protecting the sensitive component from damage due to transients.

The SMDJ120 is a popular TVS diode used in consumer and industrial applications such as personal computers, telecommunications, automotive, robotics, home automation, and aircraft. It is also used in medical equipment and in certain defense and aerospace applications. It is an inexpensive and reliable way to effectively protect against harmful voltage transients.

In summary, the SMDJ120 is a versatile, low-capacitance bidirectional transient-voltage-suppression diode used across a wide range of applications to protect against the damaging effects of voltage transients. By limiting the peak voltages to safe values, SMDJ120 can help ensure reliable operation of sensitive electronic components. It is available from many manufacturers, and is a popular choice for systems that require a reliable, cost-effective protection solution.

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