JANTX1N4990US

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Introduction

JANTX1N4990US is a type of single zener diode which can be found in a wide variety of applications. This diode is a small-signal zener diode with a reverse Zener voltage range from 600 mV to 900 mV and a peak inverse voltage (PIV) of 6.0 V. The maximum forward voltage drop is 0.15 V and the maximum reverse current is typically 5.0 μA. It is an ideal choice for applications where low power dissipation and high stability are a priority.

Application field

The JANTX1N4990US is commonly used in a wide range of applications such as voltage regulation, voltage clamping, voltage detection, and energy conditioning. It can be used in industrial control, telecommunications, computer systems, consumer electronics, automotive, and aerospace applications. It is also used to protect devices from overvoltage, undervoltage, and/or transient conditions.

Working principle

The working principle of the JANTX1N4990US is based on the PN junction diode. The diode has two terminals, an anode and a cathode. When a voltage is applied to the diode, the electrons and the holes combine at the PN junction forming an depletion layer. As the forward voltage increases the conductance increases and current starts flowing through the diode. In the reverse biased direction, the Zener voltage is applied across the diode, causing current to flow in the opposite direction, making the diode operate like a two-terminal voltage regulator.

When the voltage across the diode is below the Zener voltage, the device operates as a normal diode, and it functions as a rectifier. When the voltage is above the Zener voltage, it acts as a voltage regulator and the current will flow in the reverse direction, resulting in a stable output voltage. The Zener voltage can be set by adjusting the doping of the junction.

Conclusion

The JANTX1N4990US single zener diode is a versatile and reliable choice for any application requiring a low power dissipation and stable output voltage. The diode employs a PN junction which is reverse biased to provide a consistent Zener voltage and make the device suitable for voltage regulation, voltage clamping, voltage detection, and energy conditioning.

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