JANTXV1N4581AUR-1

Series:	Military, MIL-PRF-19500/452
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	6.4V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	25 Ohms
Current - Reverse Leakage @ Vr:	2µA @ 3V
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Surface Mount
Package / Case:	DO-213AA (Glass)
Supplier Device Package:	DO-213AA

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Introduction

The JANTXV1N4581AUR-1 is a diode, specifically classified as a single Zener diode, with a maximum reverse power rating of 0.75 watts. It has a reverse breakdown voltage of 4.7 volts and a nominal Zener voltage of 4.6 volts. Its peak reverse current rating is 0.3 amperes and the maximum junction temperature is 175 degrees Celsius. This versatile single Zener diode is utilized in a variety of applications and can be found on everything from DC/DC voltage regulator circuits to integrated circuit terminations.

Application Field

The most common applications for JANTXV1N4581AUR-1 are voltage regulation, signal voltage equalization, memory systems, and transient protection. As a Zener diode, it is commonly used in DC/DC charging regulators, providing overcurrent protection and regulating a battery’s voltage. As a signal voltage equalizer, it is used to maintain a constant voltage level in sound systems, audio mixing boards, and frequency circuits. In memory systems, the JANTXV1N4581AUR-1 is used to equalize voltages in DRAM and SRAM memory systems. Finally, as a transient protection device, it helps to protect integrated circuits against sudden breakdowns of voltage, commonly caused by electrostatic discharges.

Working Principle

The JANTXV1N4581AUR-1 works on the principle of an electrical breakdown in reverse bias. With a reverse bias applied to its cathode, electrons will jump from the bulk material into the vacuum of the p-n junction, creating an avalanche effect and “breaking down” the junction. This breakdown, which occurs at a certain “knee” voltage, called the breakdown voltage, is what has been designated as the nominal Zener voltage.To further understand how this diode works, we must examine its circuit-level operation. As voltage is applied, a current flows through the diode. As this voltage reaches the breakdown or “knee” voltage (Zener voltage), an avalanche occurs, causing the current to become limited by the Zener resistance. This results in an almost constant voltage across the diode, thus providing regulated voltage. As this voltage is stabilized, the current passes through the diode to the load and the diode begins to conduct as a normal diode.

Conclusion

The JANTXV1N4581AUR-1 is a versatile single Zener diode with numerous applications from DC/DC voltage regulator circuits to integrated circuit terminations. Working on the principle of an electrical breakdown in reverse bias, the voltage is “broken down” across the p-n junction, creating a regulated voltage. This is stabilized and allows current to be passed through the diode, providing a useful and efficient means of voltage regulation.

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