SMA5J8.5CAHE3/61

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TVS (transient voltage suppressors) diodes are an important part of the devices designed to protect against voltage transients - short high voltage peaks caused by lightning or other unexpected power surges. The SMA5J8.5CAHE3/61 is one such example. This article will discuss its application field and working principle.

Application Field

The SMA5J8.5CAHE3/61 diode has been primarily designed for use in low-voltage, low-current circuits. This makes it suitable for applications such as protectors on circuits in home appliances, automotive and consumer electronic products.

The diode features excellent surge capability, meaning it can withstand a large number of high voltage transients before failing. This makes it suitable for applications in which the user requires high reliability.

Working Principle

In order to understand how the SMA5J8.5CAHE3/61 secures circuits against high voltage transients, it is important to understand the basics of its operation. The diode works on the principle of avalanche breakdown.

When connected in a diode configuration, current will only flow if the applied voltage exceeds a certain threshold. This threshold is known as the breakdown voltage. If the voltage exceeds this threshold, the current will increase exponentially, this phenomenon is known as avalanche breakdown. In an avalanche breakdown, the current is increased significantly, resulting in a clamping of the voltage in the circuit, thus providing protection against voltage transients.

The breakdown voltage of the SMA5J8.5CAHE3/61 is 8.5V. This means that the device can protect circuits from transients of up to 8.5V. Beyond this voltage, the diode will start to breakdown, which can result in damage to the connected components.

Conclusion

The SMA5J8.5CAHE3/61 diode is a great device for protecting low-voltage, low-current circuits from voltage transients. It works using the phenomenon of avalanche breakdown, clamping the voltage in the circuit and preventing damage to the connected components. Despite its small size, the diode features excellent surge capability, meaning it is suitable for applications in which high reliability is required.

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