SMBJ45CAHR5G

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TVS (transient voltage suppressor) diodes provide protection against potentially damaging transient or over-voltage surges. The SMBJ45CAHR5G is a unidirectional, 45V bidirectional transient voltage suppressor, designed for AC and DC line protection. It is designed to protect sensitive electronic components such as computer systems, process controllers, and communication systems. Its unidirectional characteristics allow it to protect against over-voltage surges and transient events.

The SMBJ45CAHR5G offers fast response times of 10 to 25 nanoseconds, enabling it to protect sensitive components and systems from potentially damaging over-voltage transients. It is also designed to meet the requirements of the automotive industry, as well as to protect sensitive electronic components in industrial, telecom, and consumer applications.

The SMBJ45CAHR5G features a low on-state voltage drop of 0.68V, allowing it to provide better protection against over-voltage transients. Its low on-state voltage drop is also beneficial for applications that require the use of batteries, as it helps to minimize the amount of power needed to power the device. This reduces energy consumption and helps to prolong the life of the device.

The SMBJ45CAHR5G also features transient energy absorption capability, allowing it to absorb up to 5.4 joules of energy per unit. This helps to dissipate energy from transient events quickly, such as those caused by lightning or electrostatic discharge. As such, it helps to protect sensitive electronic components and systems from potentially damaging effects.

The working principle of this device is based on avalanche effect gouging. When an over-voltage transient is applied to the device, its PN junction reverse bias voltage (VR), increases with the applied voltage. Once the avalanche breakdown voltage (VA) of the device is reached, avalanche current begins to flow through the device. This current is generated due to the large electric fields near the junction of the device, which cause charge carriers to be ejected from the junction. These charge carriers cause an avalanche of electric current to flow through the device.

Once the avalanche current reaches its peak, the voltage through the device begins to decrease. The device is able to absorb all of the surge energy and dissipate it before it has a chance to damage any sensitive components connected to it. This is what makes the SMBJ45CAHR5G an excellent choice for protecting sensitive electronic components and systems.

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