SMDJ90CA

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TVS-Diodes are devices used to limit high surge voltages and protect circuits from transients. TVS-Diodes are designed to meet specific electrical requirements in the electronics industry. The SMDJ90CA is a specific type of TVS-Diode that is used to protect electronic equipment from transient and other electrical overvoltage conditions.

The SMDJ90CA is a bidirectional device, meaning it can protect circuits from positive and negative voltage transients. It is designed to handle transients as high as +80 volts and -64 volts. This makes it suitable for use in many different application fields, including industrial and automotive systems. The device also has good ESD protection, ensuring that it can handle electro-static discharge without permanent damage.

In terms of working principle, the SMDJ90CA provides protection against transients through a process known as ‘avalanche breakdown’. Avalanche breakdown occurs when the voltage across a device exceeds a critical threshold, causing a large current to flow. This current causes rapid heating of the device, which then breaks down the junction and absorbs the energy of the transient. This prevents the voltage across the device from exceeding the breakdown voltage, thereby protecting the circuit.

In order to ensure the SMDJ90CA operates correctly, it must be connected correctly. The correct connection of the device is a common source with the component leads connected and mounting holes and epoxy pad ground surface connected as well. The ground connection should be made with twisted pairs so that it is kept as low impedance as possible. This will reduce the chances of the transient voltage causing any damage to the device.

The SMDJ90CA is a versatile device suitable for a wide range of applications. Its high breakdown and ESD protection ratings make it an ideal choice for automotive and industrial systems. Through the use of avalanche breakdown, the device is able to provide effective protection against voltage transients. By following the correct connection procedure, the SMDJ90CA can be used safely and effectively in many different applications.

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