1N5377/TR8

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	91V
Tolerance:	±20%
Power - Max:	5W
Impedance (Max) (Zzt):	75 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 65.5V
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:	1N5377

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1N5377/TR8 application field and working principle

The 1N5377/TR8 is a type of single Zener diode, designed for applications like voltage regulation, voltage stabilization and voltage steering. These diodes are generally preferred in applications that require fast switching between low-voltage power supplies and higher voltages. The 1N5377/TR8 series diodes have a wide variety of voltage ratings, ranging from 3.3V to 20V, and temperature ratings from -55 degrees to +175 degrees Celsius.

Characteristics & Specifications

The 1N5377/TR8 diodes have a maximum reverse breakdown voltage range of 3.3V to 20V, a maximum power dissipation of 500mW, and a maximum reverse current of 5.0mA. The junction capacitance of the diode is typically very low, between 7.0pF to 20pF in the reverse-biased mode. In the forward-biased mode, the maximum forward voltage at 500mA is typically up to 1.2V.

Working Principle

The 1N5377/TR8 diodes are Zener diodes, meaning they are reverse-biased p-n junction rectifiers that are designed to operate in the reverse breakdown region. When the applied voltage is greater than the breakdown voltage of the diode, the diode will be conducting and the total current through the diode will be equal to the sum of the reverse current and forward current. The reverse current, also known as the leakage current, depends on the junction temperature of the diode, the doping level of the device and the reverse voltage. The forward voltage drop across the diode depends on the applied forward current and the parameters of the device.When the diode is used for voltage regulation and voltage stabilization, it will be reverse-biased and the current through the diode will be controlled by the voltage applied to it. The voltage across the diode is usually lower than the applied voltage, and is considered to be the “Zener voltage”. This ensures that the current through the diode is limited and the output voltage is stable.The 1N5377/TR8 diodes are also commonly used for voltage steering in switching power supplies. In this application the diode is connected in series with a MOSFET switch, and is used to rapidly switch between low-voltage and higher voltage sources. When the MOSFET switch is off, the diode is reverse-biased and its breakdown voltage is used to limit the current flow from the higher voltage source. When the MOSFET switch is on, the diode is forward-biased and its low forward voltage drop is used to rapidly switch between low-voltage states.

Applications

The 1N5377/TR8 is designed to provide voltage regulation, voltage stabilization and voltage steering capabilities. It is suitable for a variety of applications such as switching power supplies, automotive electronics, power management, computer peripherals, telecommunications equipment, and consumer electronics.

Conclusion

The 1N5377/TR8 is a single Zener diode designed to provide voltage regulation, voltage stabilization, and voltage steering capabilities. Its small dimensions, low leakage current, and wide voltage range make it an ideal choice for a variety of applications. Its wide operating temperature range allows it to function reliably over a wide range of environmental conditions.

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