1N4728A - Semiconductor Diode

Product Overview

Category:

The 1N4728A is a semiconductor diode belonging to the Zener diode category.

Use:

It is commonly used for voltage regulation and voltage reference applications.

Characteristics:

Zener voltage: 3.3V
Power dissipation: 1.0W
Package type: DO-41
Operating temperature range: -65°C to +200°C
Forward voltage: 1.2V
Reverse current: 5μA

Packaging/Quantity:

The 1N4728A is typically available in bulk packaging with quantities ranging from hundreds to thousands per reel.

Specifications

Zener voltage: 3.3V
Power dissipation: 1.0W
Maximum forward voltage: 1.2V
Maximum reverse current: 5μA
Package type: DO-41
Operating temperature range: -65°C to +200°C

Detailed Pin Configuration

The 1N4728A has two pins, anode (A) and cathode (K), which are identified by the physical orientation of the diode within the DO-41 package.

Functional Features

The 1N4728A operates as a voltage regulator, maintaining a constant output voltage across a wide range of load currents and temperatures.

Advantages and Disadvantages

Advantages

Precise voltage regulation
Wide operating temperature range
Small form factor

Disadvantages

Limited power dissipation capability
Sensitive to overvoltage conditions

Working Principles

The 1N4728A operates based on the Zener effect, where it maintains a nearly constant voltage across its terminals when reverse-biased at or above its breakdown voltage.

Detailed Application Field Plans

The 1N4728A is widely used in various electronic circuits such as voltage regulators, voltage references, and surge suppressors. It finds applications in power supplies, instrumentation, and automotive electronics.

Detailed and Complete Alternative Models

1N4728: Similar specifications with a different tolerance range
1N4733A: Higher Zener voltage variant
BZX55C3V3: Comparable Zener diode with different package type

In conclusion, the 1N4728A Zener diode serves as a crucial component in electronic circuits requiring precise voltage regulation and reference. Its compact size and reliable performance make it a popular choice in diverse applications.

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Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan 1N4728A dalam solusi teknis

What is the 1N4728A diode used for?
- The 1N4728A is a Zener diode commonly used for voltage regulation and protection in electronic circuits.
What is the voltage rating of the 1N4728A diode?
- The 1N4728A has a nominal voltage of 3.3 volts.
How does the 1N4728A diode regulate voltage?
- The 1N4728A conducts current in reverse-bias mode when the voltage across it exceeds its breakdown voltage, effectively regulating the voltage.
Can the 1N4728A be used for overvoltage protection?
- Yes, the 1N4728A can be used to protect sensitive components from overvoltage by shunting excess current when the voltage exceeds its rating.
What are the typical applications of the 1N4728A diode?
- Typical applications include voltage regulation in power supplies, overvoltage protection in circuits, and voltage reference in instrumentation.
What is the maximum power dissipation of the 1N4728A diode?
- The maximum power dissipation is typically around 1.3 watts.
Is the 1N4728A suitable for high-frequency applications?
- The 1N4728A is not specifically designed for high-frequency applications but can be used within its specified frequency range.
What is the temperature coefficient of the 1N4728A diode?
- The temperature coefficient is approximately -2.2 mV/°C, indicating a relatively stable voltage reference over a range of temperatures.
Can multiple 1N4728A diodes be connected in series or parallel?
- Yes, multiple 1N4728A diodes can be connected in series to increase the breakdown voltage or in parallel to handle higher currents.
Are there any important considerations when using the 1N4728A in a circuit?
- It's important to ensure that the diode is operated within its specified current and power ratings, and to consider its voltage tolerance and temperature characteristics for accurate circuit design.