1N4748 G

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The 1N4748 G Zener diode is a single diode available in variety of Voltage ratings from 3.3V to 75Volt with a wide Power rating from 0.35W to 10W. It is mainly used for applications like voltage regulation and low current switching. It is critical for dual voltage operation and are easily available in the market.

The 1N4748 G Zener diode works on the principle of Zener breakdown. Zener breakdown occurs when the voltage applied across a Zener diode exceeds its Zener voltage or breakdown voltage. The Zener diode is a heavily doped semiconductor device which has a very narrow PN junction and a thicker than normal depletion zone. The lower the doping level, the wider the depletion zone, and the higher its Zener voltage.

When a voltage higher than the breakdown voltage is applied across the diode, a strong electric field builds in the junction. This electric field causes electrons in the depleted region near the junction to overcome the barrier potential and get across the junction, thereby allowing current to flow. The electrons then recombine with holes in the same region and the current is zero, and the whole cycle is repeated.

The 1N4748 G Zener diode is widely used in voltage regulation applications like damper diode, digital outputs, LED flasher, multiplexed display circuits, power supply switching, surge protection, and voltage regulation. It is also commonly used in digital logic circuits and op amps.

In voltage regulating circuits, the 1N4748 G Zener diode is used as a shunt regulator. When the input voltage to the circuit increases, the Zener diode conducts and thus passes the current through it, thus reducing the voltage across the load. The Zener diode also prevents the voltage from increasing above the rated Zener voltage.

In power supplies, the 1N4748 G Zener diode is used for multiplexing power sources in order to maintain proper output voltage and current. In multiplexing power supplies, the Zener diode is used to divert excess current from one power source when the voltage from another power source drops. This can be an important function during times of peak demand when the input voltage may drop momentarily.

In digital logic circuits, the 1N4748 G Zener diode protects the circuit from overloads or voltages higher than the rated Zener voltage. By conducting a current, the Zener diode carries the excess voltage away and prevents damage to the circuitry. The Zener diode also prevents the voltage from increasing beyond the rated Zener voltage.

The 1N4748 G Zener diode is also commonly used in op amps to prevent the amplifier from saturating and overdriving the output voltage. The Zener diode ensures that the output voltage does not exceed a pre-defined limit and helps protect the circuit from damage due to overdriving.

In LED displays, the 1N4748 G Zener diode is used to shunt current away from the LED and prevent it from over-driving and damaging the LED. The Zener diode is also used to limit the current flowing through the LED and thus extending the lifespan of the LED.

The 1N4748 G Zener diode is an important device for many applications. Its applications range from surge protection and voltage regulation to low current switching and digital logic circuits. Its effectiveness and reliability make it a popular choice for a variety of applications.

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