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Diodes - Zener - Single

A Zener diode is a type of diode, which switches from a normal diode to a point of reverse breakdown when reverse bias voltage is applied. The BZM55C43-TR3 is a single Zener diode, which can be used in numerous applications. The following discusses the BZM55C43-TR3’s application fields and working principle.

Application Fields of BZM55C43-TR3

The BZM55C43-TR3 has various applications in industries such as telecommunications, consumer electronics, medical, automotive and industrial electronics. Its common applications include providing control in switching between linear and switching power supplies, filters, and over-voltage protection. Because of its low reverse leakage (<30uA at 260V) and higher power dissipation (1.3W) interference from inductive loads, capacitive components and insulation tests can be minimized.

Working Principle of BZM55C43-TR3

The BZM55C43-TR3 works on the principle of reverse breakdown. It is composed of two components, a P-N junction and a rectifying diode in a single package. The P-N junction allows electric current to flow in one direction, whereas the rectifying diode allows current to flow in both directions. When reverse bias voltage is applied to the zener diode, it reaches a voltage threshold known as the zener voltage, which is between 7V and 500V (in this case the zener voltage of BZM55C43-TR3 is 43V). The zener voltage stays constant despite the variations in reverse bias voltage, thus allowing the smooth flow of current when it exceeds the zener voltage.

In addition, Zener diodes are typically used in combination with resistors or other components. This can allow a second diode to absorb additional energy and to ensure the voltage drop across the Zener diode does not exceed its rated limit.

Conclusion

The BZM55C43-TR3 is a single Zener diode, which has numerous applications across various industries, such as telecommunications, consumer electronics, medical, automotive and industrial electronics. It works on the principle of reverse breakdown, and is usually used in combination with resistors or other components. The BZM55C43-TR3 is designed to have a low reverse leakage and higher power dissipation, thereby providing superior functionality.

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