BZX79-C18,133

Series:	--
Packaging:	Tape & Box (TB)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±5%
Power - Max:	400mW
Impedance (Max) (Zzt):	45 Ohms
Current - Reverse Leakage @ Vr:	50nA @ 12.6V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	-65°C ~ 200°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	ALF2
Base Part Number:	BZX79C18

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The BZX79-C18,133 is a Zener single diode. It is a three-terminal Zener diode designed to provide circuit protection when operated under certain current and voltage conditions. The diode features an over-voltage capability of 18.133V as well as a common VZ reverse breakdown voltage of 15V, making it suitable for a variety of applications.In general, Zener diodes are used to regulate voltage. They are capable of handling the small signal levels associated with low-power electronics, such as those in digital electronics, power supplies, regulators, and amplifiers. The diode’s ability to regulate the voltage effectively means that it can prevent potential damage to the circuit from overvoltage. As a result, it is often used as a “voltage clamp” or “fuse” that affords circuit protection against overvoltage.The BZX79-C18,133 Zener single diode is composed of two semiconductor materials, n-type and p-type silicon, which are combined in such a way that they form a “P-N junction”. The combination of these two materials creates a higher resistance to current when the voltage imposed is negative, making the diode ideally suited for these types of applications.When the diode is operating within the normal range of voltages, the diode is said to be in “forward bias”. This means that a small current can flow through the diode without any issue. As the voltage increases, however, the resistance of the diode increases with it. Eventually, the level of resistance becomes so high that the current can no longer flow, thus stopping its flow. This is known as “reverse bias”.At the Zener breakdown voltage, the diode exhibits a significantly higher level of current. This is because the p-n junction is acting as an insulator, causing an increase in the voltage drop across the diode. This keeps the voltage of the circuit consistent at the specified VZ value, while also protecting the circuit against hazards associated with overvoltage.The BZX79-C18,133 Zener single diode has a variety of applications. It is used in voltage regulator circuits to maintain a constant voltage output. It is also used as a protective device for circuits, to prevent them from experiencing damage due to overvoltage. In addition, it can be used in sample-and-hold circuits, switching voltage regulators, and other switching applications.Overall, the BZX79-C18,133 Zener single diode is a reliable and efficient device for providing circuit protection and voltage regulation. When installed and operated in the appropriate conditions, it can prevent the circuit from experiencing overvoltage or damage due to excessive current. Its wide range of applications, from voltage regulation to circuit protection, makes it a versatile and invaluable part of many electronic systems.

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