Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	51V
Tolerance:	±2%
Power - Max:	500mW
Impedance (Max) (Zzt):	125 Ohms
Current - Reverse Leakage @ Vr:	100nA @ 39V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Surface Mount
Package / Case:	DO-213AC, MINI-MELF, SOD-80
Supplier Device Package:	SOD-80 MiniMELF

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Introduction

The TZMB51-GS18 is single diode, a type of semiconductor diode specifically designed to operate in the reverse breakdown region. It is a two terminal device that is often used as a shunt regulator to provide a reference voltage and is sometimes referred to as a Zener diode.Since this diode has the ability to regulate the voltage across it, it can be used for many applications. This article will discuss the TZMB51-GS18 in more detail, getting into its application field and working principle.

Application Field

The TZMB51-GS18 can be used in a wide range of applications. For example, it can be used in power supplies and DC to DC converters as a means to regulate the output voltage. It can also be used as a voltage reference, where the voltage across the diode is checked against a fixed reference voltage.In addition, the TZMB51-GS18 can for used for protection of other electronic devices, such as in circuits that require an overvoltage protection circuit. Other applications include AC line-filtering, DC-supplied switching, and the stabilization of circuits with a high degree of tolerance.

Working Principle

The working principle of the TZMB51-GS18 diode lies in its behavior in the reverse breakdown region. When a diode is under a higher reverse bias voltage than its breakdown voltage, it no longer follows the linear region and it starts to conduct.When this happens, the voltage drop across the diode (Vz) is much lower than its reverse bias voltage (Vr), and it is the same for any given current. This property of the diode makes it useful in many applications.When the diode is connected in series to the load, it acts as a shunt regulator. In this scenario, the diode is often referred to as a Zener diode. The voltage across the diode is constant, which makes it suitable for applications where a constant voltage is required, such as in power supplies.The TZMB51-GS18 diode can be used as an overvoltage protection device as well. In this application, the diode is connected in reverse across the load. The diode will act as a limit to the voltage, so that if the voltage across the load exceeds the breakdown voltage of the diode, the diode will start to conduct. This will prevent any overvoltage damage to the load.

Conclusion

The TZMB51-GS18 is a single diode specifically designed to operate in the reverse breakdown region. It is often used as a shunt regulator to provide a reference voltage, as well as for protection of other electronic devices. The diode has the ability to regulate the voltage across it, making it suitable for a wide range of applications.

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