1N5749C

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1N5749C is a type of Zener diode, which is a type of diode specially designed to allow reverse current flow when the voltage reaches a specific level. It is widely used in many areas, such as voltage regulation, providing over-voltage protection, voltage clamping and power supplies. In this article, we will discuss the application field and working principle of 1N5749C.

Application field

1N5749C is mainly used for voltage regulation and over-voltage protection. It is often used in low-voltage regulators, such as adjustable DC power supplies and battery chargers, to regulate the output voltage. This Zener diode will be reverse biased and is often used in pairs with resistors, diodes and other components in this application. It is also used to provide over-voltage protection in power supplies, as the diode will “breakdown” and start to conduct when the input voltage reaches a certain level, thus, preventing the components connected to it from being destroyed. Another popular application for 1N5749C is for voltage clamping, it is used to limit the maximum voltage level by clamping the voltage within the voltage of the diode. This is useful when dealing with high speed switching applications.

Working Principle

1N5749C is a diode which comes from the Zener diode family, it is a special kind of diode that was specifically designed for reverse current flow when the voltage applied reaches a certain level. Unlike a normal diode which will block any current that flows in the reverse direction, 1N5749C will start to conduct and allow a small amount of current flow through when the applied voltage reaches a certain threshold level, usually referred to as the Zener voltage or the Zener breakdown voltage. In other words, when the voltage applied across the diode reaches a high level, the diode will start to “breakdown” and allow a small amount of current through it. The current that is allowed through will depend on the current flowing in the circuit, the Zener voltage and the Zener impedance of the diode.

1N5749C has a Zener voltage of 5.7V, a Zener impedance of 100 ohms and a power rating of 1W. It is important to note that the Zener voltage of the diode is the reverse breakdown voltage and not the forward voltage. When the device is reverse biased, the voltage applied must be greater than the Zener voltage for the diode to breakdown and start conducting. This means that the voltage across the diode will never be lower than the Zener voltage.

In summary, 1N5749C is a Zener diode which is mainly used for voltage regulation, over-voltage protection and voltage clamping. It is designed to conduct when the applied voltage reaches the Zener voltage and the current flowing through the diode will depend on the circuit, the Zener voltage and the Zener impedance of the device.

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