SMCJ85CA-TR Circuit Protection

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TVS-Diodes, such as the SMCJ85CA-TR, are used in a variety of applications and can provide protection from voltage transients that can damage your equipment. In this article, we will explore the application field and working principle of the SMCJ85CA-TR.

Application Field

The SMCJ85CA-TR is the world’s smallest dual TVS-diode in a 5mm axial-leaded SOD-123 package, designed to provide over voltage protection for sensitive electronic components. It can be used in 5V to 20V systems respectively. It operates up to 75V, which provides protection against electrostatic discharge up to 2.5kV (air discharge).

The SMCJ85CA-TR protects electronic devices from high-voltage transients such as those caused by lightning strikes and is commonly used in a variety of industries and applications, ranging from more simple computer peripherals like keyboards, mice, and external hard drives to complex industrial applications such as automotive electronics, data centers, and telecommunications.

Working Principle

TVS-Diodes such as the SMCJ85CA-TR work on a very simple principle. When the voltage across the diode exceeds a predetermined threshold, the diode conducts current, allowing the electricity to flow in the opposite direction. This limits the overvoltage to a predetermined voltage below the device’s rating.

In comparison to other methods of protection such as fuses and circuit breakers, TVS-Diodes have many benefits. The devices have zero standby current, fast response times, no resetting delay, and no ageing. Plus, the devices are low-cost, reliable, and rugged.

The SMCJ85CA-TR in particular has a maximum off-state reverse voltage of 50 volts and a maximum continuous reverse leakage current of 5mA, and additionally works at temperatures between -55°C and 175°C.

Conclusion

The SMCJ85CA-TR is a useful device to help protect your equipment from voltage transients. It is a dual TVS-diode in a 5mm axial-lead SOD-123 package and can be used in 5V to 20V systems. The device works by limiting the overvoltage to a predetermined voltage and has numerous benefits such as zero standby current, fast response times, and no resetting delay. Plus, the device is low-cost, reliable, and rugged. If you are looking for a good solution to protect your equipment, the SMCJ85CA-TR is an excellent option.

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