Technical Overview of the 1N4728A: Datasheet, Specifications, and Circuit Design
2024-10-14 4442

The 1N4728A Zener Diode operates at 3.3V and is widely used in electronics for voltage regulation and protection. This article delves into the datasheet, pinout, voltage characteristics, and various technical specifics of the 1N4728A. Additionally, it covers related semiconductors, capacitors, resistors, and ICs. For tailored applications, procuring quotes for these components is worthwhile.

Catalog

1N4728A Pinout

Pin No.	Pin Name	Description
1	Anode	Current always Enters   through Anode
2	Cathode	Current always Exits   through Cathode

The 1N4728A CAD Model

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3D Model

Overview of 1N4728A

The 1N4728A is a versatile low-voltage Zener diode encapsulated in a hermetically sealed SOD66 (DO-41) package. It is available in 22 distinct types, with nominal working voltages ranging from 3.3V to 24V.

Technical Specifications

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 5 days ago)	Factory Lead Time	18 Weeks
Mount	Through Hole	Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial	Number of Pins	2
Supplier Device Package	DO-41	Material	Glass
Weight	245mg	Breakdown Voltage / V	3.3V
Operating Temperature	-65°C~200°C	Packaging	Bulk
Published	2009	Tolerance	±5%
Part Status	Active	Moisture Sensitivity Level (MSL)	1 (Unlimited)
Max Operating Temperature	200°C	Min Operating Temperature	-65°C
Power Rating	1W	Voltage - Rated DC	3.3V
Max Power Dissipation	1W	Base Part Number	1N4728
Working Voltage	3.3V	Impedance	10Ohm
Element Configuration	Single	Current - Reverse Leakage @ Vr	100μA @ 1V
Power Dissipation	1W	Output Current	330mA
Power - Max	1W	Max Reverse Leakage Current	100μA
Impedance-Max	10Ohms	Test Current	76mA
Forward Voltage	1.2V	Voltage - Zener (Nom) (Vz)	3.3V
Zener Voltage	3.3V	Peak Reverse Current	100μA
Voltage Tolerance	5%	Zener Current	76mA
Height	2.72mm	Length	5.21mm
Width	2.72mm	REACH SVHC	No SVHC
Radiation Hardening	No	RoHS Status	ROHS3 Compliant
Lead Free	Lead Free

Features of 1N4728A

Power Dissipation Capacity

The 1N4728A excels with its commendable power dissipation capacity of 1.0 Watt, a feature that demonstrates its capability to perform consistently in scenarios where thermal management is a concern.

Zener Voltage Range

This Zener diode offers a wide nominal Zener voltage range spanning from 3V to 75V.

Supporting varied circuit demands, this flexibility makes it adaptable to a myriad of electronic designs.

Voltage Tolerance

The standard voltage tolerance of ±5% provides dependable voltage regulation.

Such precision is crucial for maintaining the steady state of systems and ensuring their prolonged efficiency.

Compliance and Environmental Considerations

The 1N4728A meets RoHS regulations and boasts a lead-free finish, reflecting its commitment to modern environmental standards.

This alignment with eco-friendly practices highlights its role in promoting sustainable electronics production.

Applications of 1N4728A

The 1N4728A Zener diode enjoys widespread application in modern electronics, celebrated for its robust and multifaceted characteristics.

Voltage Protection Circuits

The 1N4728A excels in voltage protection circuits, playing a crucial role in safeguarding sensitive components.

It mitigates risks associated with voltage spikes by clamping excessive voltages, thus preventing potential damage to microcontrollers and integrated circuits (ICs). Many electronics engineers have successfully employed the 1N4728A in projects where maintaining operational stability under fluctuating voltage conditions was essential.

Low Current Voltage Regulator

Serving as a low current voltage regulator, the 1N4728A ensures a constant voltage supply to electronic components, even when input voltages fluctuate.

This stability is particularly vital in precision devices such as sensors and microprocessors. Expertise in circuit design reveals that using the 1N4728A in tandem with capacitors can smooth out ripples and transient changes, thereby enhancing the overall reliability of the voltage regulation process.

Voltage Stabilizing Circuits

Within voltage stabilizing circuits, the 1N4728A provides a reliable reference voltage that enhances the performance and accuracy of analog circuits.

By ensuring a steady voltage level, it helps maintain the integrity of readings from analog sensors and improves the operation of analog-to-digital converters (ADCs). This application holds particular value in industrial automation and instrumentation fields, where precise measurements are crucial.

Diverse Electronic Applications

Beyond conventional roles, the 1N4728A's utility extends to various innovative electronic applications.

For instance, it can be integrated into power supply circuits to prevent over-voltage conditions or used in battery charging circuits to manage voltage levels effectively. Additionally, utilizing the diode in surge protection schemes for communication devices can significantly enhance their durability and performance.

1N4728A Circuit

The 1N4728A is a 3.3V Zener diode frequently employed in voltage regulation applications. Zener diodes are a type of semiconductor device that allows current to flow in the forward direction, much like a typical diode. They also permit current to flow in the reverse direction when the voltage surpasses a defined threshold, known as the Zener breakdown voltage.

Alternatives to 1N4728A

- 4.7V Zener

- 5.1V Zener

- 6.8V Zener

- 7.5V Zener

- 15V Zener

Physical Dimensions of 1N4728A

Dimensions and Manufacturing Precision

The 1N4728A is defined by its finely tuned physical dimensions, essential for ensuring dependable performance in electronic circuits.

1N4728A Manufacturer

ON Semiconductor, a dynamic entity that transitioned from the Fortune 500 to the Fortune 1000, offers cutting-edge solutions in power and signal management, in addition to logical, discrete, and custom devices. Their product lineup caters to a diverse range of industries: automotive, communications, computing, consumer electronics, industrial applications, LED lighting, medical devices, military/aerospace, and power management sectors.

Parts with Similar Specs

ON Semiconductor and other manufacturers provide components with specifications resembling those of the 1N4728A.

Image
Part Number	1N4728A	1N4730A	1N4743A	1N4729A
Manufacturer	ON Semiconductor	ON Semiconductor	ON Semiconductor	ON Semiconductor
Mount	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Zener Voltage	3.3 V	13 V	3.6 V	3.9 V
Tolerance	±5%	±5%	±5%	±5%
Max Power Dissipation	1 W	1 W	1 W	1 W
Power Dissipation	1 W	1 W	1 W	1 W
Impedance	10 Ω	10 Ω	10 Ω	9 Ω
Max Reverse Leakage Current	100 μA	5 μA	100 μA	50 μA

Datasheet PDF

Download datasheets and manufacturer documentation for ON Semiconductor 1N4728A.

Datasheets :

1N4728A.pdf
1N4728A Details PDF
1N4728A Details PDF for FR.pdf
1N4728A Details PDF for IT.pdf
1N4728A Details PDF for ES.pdf
1N4728A Details PDF for DE.pdf
1N4728A Details PDF for KR.pdf