1N5378B

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	100V
Tolerance:	±5%
Power - Max:	5W
Impedance (Max) (Zzt):	90 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 72V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 1A
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Through Hole
Package / Case:	T-18, Axial
Supplier Device Package:	T-18
Base Part Number:	1N5378

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1N5378B Application Field and Working Principle

The 1N5378B is a type of diode that belongs to the Zener diode family. It is a kind of Zener diode with a single junction, which means it is composed of a single PN junction. Its application field includes a wide range of voltages and current ratings, making it one of the most common voltage regulators in use today.The 1N5378B is mainly used to provide a steady and regulated voltage level to ensure proper operation of all circuits. It is typically used in circuits that require a relatively low output current, such as in switching power supplies, digital circuits, and other similar applications. It is also commonly used to clamp voltage spikes and transient overvoltages, thus protecting sensitive components from damage.The 1N5378B works based on the principle of Zener breakdown. This occurs due to the narrowing of the voltage barrier across the PN junction, allowing current to flow through it. As the current passes through the PN junction, a reverse breakdown voltage is created, thereby regulating the voltage at the terminal end of the diode to a certain value, that is the Zener voltage.To protect the circuit from fault conditions such as over-voltage, the 1N5378B is usually connected in series with a power supply. The power supply voltage is limited by the Zener voltage of the diode and so the output voltage remains relatively constant even if the input voltage changes. This is one of the main advantages of using a Zener diode over other types of voltage regulators.The 1N5378B is available in multiple different ratings, including 5 volts, 6.2 volts, 10 volts, 12 volts, and so on. The voltage rating basically determines the Zener voltage of the diode, with higher voltages providing greater protection against overvoltage.The 1N5378B is a versatile diode with multiple possible applications. It is relatively inexpensive and relatively easy to use, making it one of the most popular voltage regulator solutions available.

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