SMA5J17-E3/5A Circuit Protection

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Introduction

The SMA5J17-E3/5A is a device belonging to the TVS (Transient Voltage Suppressor) Diodes range. This sort of devices are specially designed for protecting sensitive circuits from high amplitude and non-repetitive pulses, generated by lightning or electronic operations. This device contains five TVS diodes in a single housing, so it’s ideal for applications that need to protect a group of circuits.

Application Field

The SMA5J17-E3/5A has a wide variety of applications. It can be used to protect automotive components, electronics communications, power supplies, computer Interface Circuits and many more. This device is suitable for protecting low voltage circuits from extreme voltages, thanks to its triggering threshold of 5,6V and its fast response time. Moreover, its low leakage current reduces energyconsuming.

Working Principle

The TVS diodes in the SMA5J17-E3/5A work like two zeners in parallel, providing a much higher breakdown voltage than standard zener diodes. In normal operation, these components don\'t conduct any current, working as regular diodes. That is why no standby current flows. But when an overvoltage occurs, the avalanche effect in the diode allows it to conduct current and clamp the voltage to the breakdown voltage. One of the advantages of this kind of diode, is that it creates a short-circuit between its terminals without solid bridging, avoiding shorts and malfunctions.

Features and Advantages

The SMA5J17-E3/5A comes with interesting features to fulfill the needs of specific applications. It has an optimizing clamping voltage for improved overvoltage protection. Besides, this diodes range is designed to guarantee surge current endurance of 1.2 x 10^8 A and a máximum peak pulse current of 250A. This device has also high PRV rating: 600W at 10/1000μs waveform.

The SMA5J17-E3/5A offers several important advantages. It has excellent clamping performance, so devices connected will have improved protection. This device, fitted on a printed circuit board, has a low clamping voltage that prevents system malfunctions. Moreover, its quick response time prevents pre-existing faults or máximum peak pulse current reaching the load and offers simple, integrated protection for low voltage circuits.

Conclusion

The SMA5J17-E3/5A is a family of TVS (Transient Voltage Suppressor) diodes designed to provide a high overvoltage protection for a wide range of applications. This device offers excellent clamping performance, optimizing the protection for sensitive devices like automotive components, computer Interfaces circuits, power supplies or electronics communications. The SMA5J17-E3/5A ensures a quick response time and a high number of surge current endurance and peak pulse current, making of this device an ideal choice to protect low voltage circuits.

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