SMBG5343A/TR13

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SMBG5343A/TR13 is a type of diode – Zener single. It is basically a diode with reverse breakdown voltage, but different from normal diodes, it has a region of negative resistance between a specific two range voltages, so it could control the current flow and also stable the fluctuating voltage.

The common operation in SMBG5343A/TR13 application field is voltage limit and surge prevention. Its rated voltage range is 4.7V to 5.3V. While the breakdown voltage is 5.3V, and power rating is 500mW. It has relatively low reverse leakage current, which is 50uA at any time when the voltage is lower than the breakdown voltage.

In work principle, when forward bias, it acts as a normal diode, and when forward bias occurs and voltage on anode end reaches the peak voltage 5.3V, the current will be zener regulated within a certain range, so that the output voltage can remain relatively steady.

In terms of protection, it can effectively protect MOS FET from the damage of reverse current, but when the current is beyond 50 mA, its protection effect is no longer so strong, therefore, we’d better avoid putting too much current on it in the process of use.

SMBG5343A/TR13 is widely used in medical instrument field, automotive industry, alternative power supply and military industry, it can also be used to make a simple voltage regulator, stabilize output voltage etc.

In conclusion, SMBG5343A/TR13 is a type of single diode – zener, primarily used in voltage limit, surge prevention and protection. Although it is relatively small and can be used in tight space, if current is too high the effect it brings will be reduced.

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