1N989B

Series:	--
Packaging:	Bulk
Part Status:	Discontinued at Digi-Key
Voltage - Zener (Nom) (Vz):	150V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	1500 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 114V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Through Hole
Package / Case:	DO-204AA, DO-7, Axial
Supplier Device Package:	DO-7

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Diodes - Zener - Single

The 1N989B is a type of zener diode, a diode that has a voltage-dependent breakdown known as zener breakdown. As a form of diode, the 1N989B is made of a semiconductor material composed of two regions. It has a cathode end, marked with a stripe to distinguish the end from the anode end, and the rest is the body of the diode.A zener diode has a different breakdown voltage than that of a regular diode. When the voltage is too low, the diode will not conduct, but if it is too high, the electrical current will surge across the diode. This breakdown voltage, which is known as the Zener voltage, is adjustable across a range of values, depending on how the diode is designed, and is generally higher than that of a regular diode.The 1N989B is designed to have a zener voltage around 5.6 volts, making it suitable for a variety of applications. Due to the diode\'s low forward voltage drop, it is often used in voltage regulators and digital circuits. When used in a voltage regulator, the diode is used to create a voltage-regulated power supply. The diode is used to convert the varying voltage of the power source into one that is constant and regulated, preventing current surges.In digital circuits, the 1N989B is used to protect the circuit from voltage above the Zener voltage. When this occurs, the diode will conduct current through its "on" state, preventing the higher voltage from entering the circuit and, likely, damaging its components.The 1N989B is also employed for applications that require a connection between two circuits, with the zener voltage acting as a kind of gate, allowing the current to flow in one direction without breaking the connection. The diode is also used in switching circuits, where it can be used to control the flow of current and prevent damage that could be caused by a high-voltage switch.Due to its low reverse leakage current and its ability to handle high reverse voltages, the 1N989B is also used in power supplies for a multitude of electronic devices, ranging from battery-based chargers for laptops and phones to LED drivers for illuminated signage and displays.In summary, the 1N989B has a wide variety of uses due to its adjustable Zener voltage, low forward voltage drop and high reverse voltage ratings. Its use in digital circuits and voltage regulators makes it a versatile component for a variety of applications, from battery chargers to LED drivers. As such, the 1N989B is a popular choice for many electronic devices and systems.

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