SMBJ90A

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The SMBJ90A belongs to a family of transient voltage suppressors (TVS) diodes. TVS diodes are electrical components that are designed to protect other components from voltage events that exceed the working limits. SMBJ90A devices are designed to protect other components from voltage events of up to 90V. They are typically used to protect computer and telecommunications hardware from surges, spikes and ESD (electrostatic discharge).

SMBJ90A components are designed to be placed in series with the device to be protected. When the voltage across the SMBJ90A exceeds its working limits, a high current will flow through it in order to reduce the voltage. This current can be up to 35A peak. The SMBJ90A will then "clamp" the voltage to a safe value, preventing damage to components downstream.

SMBJ90A devices are also designed to be bi-directional. This means that they will protect against surges in either direction. It also means that these devices can be used in AC circuits, working on both the positive and negative cycles of the incoming voltage.

The SMBJ90A is commonly used in applications such as personal computers, telecommunications equipment, and lighting systems. It is also becoming increasingly popular in automotive and machinery applications where it can be used to protect components and systems from voltage surges. It is one of the most popular components used for TVS protection.

When selecting a SMBJ90A device for a specific application, it is important to consider a number of factors. Some of these factors include the operating voltage of the system, the peak surge current, the ESD protection rating, the working temperature range, and the maximum clamping voltage. It is also important to consider the size of the device and its package type. SMBJ90A diodes are available in a variety of package types, including SOIC-8, SOT-23, and SMA. 

The working principle of SMBJ90A devices is relatively simple. When the voltage across the device exceeds its working limits, a high current flows through it which reduces the voltage and "clamps" it to a safe level. This current can be up to 35A peak. The device also has a built-in protection circuit which prevents it from being damaged by excessive current.

SMBJ90A devices are becoming increasingly popular components as they are relatively inexpensive, easy to install, and offer superior protection from voltage surges. They are also becoming more popular in automotive and machinery applications. As more applications begin to require TVS protection, the SMBJ90A will be an increasingly important component.

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