1N4559RB

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.7V
Tolerance:	±5%
Power - Max:	50W
Impedance (Max) (Zzt):	0.12 Ohms
Current - Reverse Leakage @ Vr:	100µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 10A
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Through Hole
Package / Case:	TO-204AD
Supplier Device Package:	TO-204AD (TO-3)
Base Part Number:	1N4559

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1N4559RB Application Field and Working Principle: Diodes are devices with two leads that only allow electrical current to flow in one direction, from the anode to the cathode. Zener diodes, in particular, are used to regulate the voltage in circuits and are also called a ‘regulator diode’. The 1N4559RB is a type of Zener diode, designed to regulate a current flowing in either direction. It is made up of a semiconductor material such as silicon, with an anode and cathode connected to two different regions of the semiconductor. The diode has a highly doped n-type and p-type material, which is connected to a resistor in order to limit the current entering the diode.In operation, when a voltage higher than the breakdown voltage is applied to the diode, electrons will flow from the n-type region to the p-type region, causing the resistance of the diode to decrease. This increases the current flow and causes a voltage to appear across the diode, known as the zener voltage. This zener voltage will drop as the current increases, and eventually reach a equilibrium point where the voltage across the diode is equal to the breakdown voltage and the current stops increasing. This equilibrium point is known as the zener break down and is used to regulate the current in a circuit.The 1N4559RB is a 1 watt diode with a breakdown voltage range of 3.2V to 15V. Its reverse breakdown voltage is greater than 400mV and its operating and storage junction temperature range is -55 deg C to 150 deg C. The anode current is typically 4μA and typical power dissipation is 1W. The 1N4559RB is mainly used in voltage regulator circuits, such as switching regulator circuits, or in series-regulating applications, and is commonly found in consumer electronics, automotive applications and other electronic devices. The 1N4559RB is made of a special alloy that gives it good thermal conductivity, making it able to dissipate heat, which is important for many applications, particularly for power supplies. The diode also has a low forward voltage, making it more efficient than other type of Zener diodes.In summary, the 1N4559RB is a type of Zener diode that is used to regulate the current in a circuit. It is made of a semiconductor material with an anode and cathode connected to two different regions of the semiconductor, and has a high breakdown voltage, a low forward voltage, good thermal conductivity and a low power dissipation. The 1N4559RB is commonly used in voltage regulator circuits, switching regulator circuits, and series-regulating applications.

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