1N5991C

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.3V
Tolerance:	±2%
Power - Max:	500mW
Impedance (Max) (Zzt):	88 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35

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The 1N5991C is a single Zener diode, which is commonly used in circuits to protect other more sensitive electronic components from voltage surges. A Zener diode regulates the voltage across its terminals and is used to protect relatively delicate electronic components such as capacitors and transistors from overvoltage. It can also be used to establish a reference voltage, to act as a voltage limiter, to control and modulate the current in a circuit, and to produce pulses.The 1N5991C Zener diode is rated at 5.1 Volts and has 0.5 Watts of power dissipation. It is made of silicon, which differs from germanium diodes in that it is not temperature sensitive. This makes the device suitable for use in a wide range of operating temperatures, from -55 to +200°C. The 1N5991C is also available with a number of different voltage ratings, from 5.1V to 500V. The 1N5991C is used in a variety of applications, including power supply regulation, radio frequency integrated circuit (RFIC) power management, mobile device charging, and voltage clamping, among other uses. It can also be used to monitor the input and output voltages of an electronic system, to protect sensitive components from overvoltage, and as part of a voltage regulator circuit. The device is extremely reliable and is designed to be able to withstand numerous cycles over its lifetime. The working principle of a Zener diode, such as the 1N5991C, is fairly simple. When the voltage across its terminals is below the rated voltage, the diode behaves as an open circuit, letting no current flow through it. However, when the voltage across it exceeds the rated voltage, the Zener diode will start to conduct current and convert the excess voltage into heat, thereby limiting the total available voltage of the circuit to the rated voltage. This is known as the “Zener breakdown effect”. The 1N5991C is extremely useful for a wide variety of applications, thanks to its reliability and ability to withstand high voltage transients. Furthermore, the device is extremely easy to integrate into existing circuits due to its wide operating temperature range and low power consumption. The 1N5991C Zener diode is an extremely versatile and reliable choice for voltage regulation, voltage monitoring, and voltage clamping.

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