1N5224B-TAP

Series:	Automotive, AEC-Q101
Packaging:	Tape & Box (TB)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	2.8V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	30 Ohms
Current - Reverse Leakage @ Vr:	75µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 200mA
Operating Temperature:	175°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35

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Introduction

The 1N5224B-TAP is a single Zener diode designed for use in precision voltage regulation and in oscillators. This component is simple to use and relatively inexpensive compared to similar devices. It has low capacitance and is capable of sustaining high reverse voltages reliably. It also provides excellent avalanche characteristics for protection against electrostatic discharge (ESD). The 1N5224B-TAP is a critical component in many applications and is useful in a wide range of circuits.

Applications

The 1N5224B-TAP can be used to regulate a constant voltage in circuits where an exact output voltage must be maintained. It can also be used to regulate an AC voltage waveform, such as in an AC voltage stabilizer. This component can also serve as a feedback element in oscillators, where the reference voltage of an amplifier is set by the Zener diode.Other applications include protection circuits, where the diode functions as a voltage clamping element to protect downstream components against excessive voltages; over-voltage protection circuits that rely on the Zener temperature coefficient to trigger a circuit that shuts off power if an overvoltage situation is detected; and Zener-reference voltage applications.

Structure and Working Principle

The 1N5224B-TAP consists of a semiconductor PN-junction diode formed of a base element (doped silicon) surrounded by a N-type diffusion layer and a P-type diffusion layer. The diode is encased in a hermetic glass-epoxy package, which allows for enhanced environmental protection. This package is also far more physically robust than plastic packaging used for some other components.The P-N junction of the 1N5224B-TAP is internally connected to two terminals, an anode and a cathode. When a voltage is applied across the two terminals, a small reverse voltage is applied to the PN-junction, which causes a current flow through the diode. As the applied reverse voltage increases, the diode conductance increases, leading to the reverse-breakdown characteristic of a Zener diode.When a voltage is applied within the diode’s breakdown voltage range, the diode will exhibit a limited reverse breakdown and begins to act more like a resistor, allowing only a specific amount of current to flow through the diode. This principle is used in Zener circuits to regulate the output voltage.

Conclusion

The 1N5224B-TAP provides a simple and cost-effective solution for applications that require accurate voltage regulation or dynamic control of AC waveforms. It can be used as a feedback element in oscillators, in protection circuits, and as a voltage regulator. This component also offers increased environmental protection thanks to its robust epoxy package.

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