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1N4148 Signal Diode: Datasheet, Pinout, and Equivalents

The 1N4148 diode is a small but powerful part used in many electronic devices. Known for its quick response time and dependability, it's a favorite choice in all sorts of circuits. In this article, we’ll explore what makes the 1N4148 special, where it’s used, and why it’s so important in today’s electronics.

Catalog

1. What is the 1N4148 Diode?

2. 1N4148 Pin Configuration

3. 1N4148 Symbol, Footprint, and CAD Model

4. 1N4148 Technical Specifications

5. Features of the 1N4148 Diode

6. Alternatives for the 1N4148 Diode

7. Applications for the 1N4148 Diode

8. Package for 1N4148

9. 1N4148 Manufacturer Information

What is the 1N4148 Diode?

The 1N4148 diode is a notable silicon diode that plays a role in directing current in a single direction. It is celebrated for its rapid recovery time, clocked at 8 nanoseconds when managing a forward current of 10mA. This quick-switching attribute renders it exceptionally apt for high-frequency applications demanding precise timing. The diode can accommodate a maximum current of 300mA and endure peak currents reaching 2A, offering extensive adaptability in circuit designs. Particularly in both analog and digital circuits, where preserving signal fidelity is of utmost focus, components that deliver rapid and accurate switching are sought. The 1N4148 diode's specifications meet the expectations of such dynamic settings, striving to minimize signal distortion.

With the capacity to handle maximum currents of up to 300mA, appropriately managing the diode's thermal aspects is needed. Maintaining the device within its thermal tolerance ensures a continuation of performance and durability. Incorporating the 1N4148 into circuit designs often necessitates evaluating its junction temperature and forward voltage drop. These elements are need to its operation under variable loads. Crafting a circuit with the 1N4148 benefits from a comprehensive grasp of these attributes, avoiding potential performance pitfalls.

1N4148 Pin Configuration

1N4148 Pinout

Pin No.	Pin Name	Description
1	Anode	Current always enters through Anode
2	Cathode	Current always exits through Cathode

1N4148 Symbol, Footprint, and CAD Model

1N4148 Symbol

1N4148 Footprint

1N4148 CAD Model

1N4148 Technical Specifications

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 4 days ago)
Contact Plating	Tin
Mounting Type	Through Hole
Number of Pins	2
Weight	4.535924g
Published	2015
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Min Operating Temperature	-65°C
Voltage - Rated DC	100V
Current Rating	200mA
Polarity	Standard
Factory Lead Time	18 Weeks
Mount	Through Hole
Package / Case	DO-204AH, DO-35, Axial
Supplier Device Package	DO-35
Packaging	Bulk
Part Status	Active
Max Operating Temperature	175°C
Capacitance	0F
Max Power Dissipation	500mW
Base Part Number	1N4148
Voltage	100V
Current - Reverse Leakage @ Vr	5µA @ 75V
Output Current	200mA
Forward Current	200mA
Max Surge Current	4A
Current - Average Rectified (Io)	200mA
Max Reverse Voltage (DC)	100V
Reverse Recovery Time	4 ns
Max Repetitive Reverse Voltage (Vrrm)	100V
Peak Non-Repetitive Surge Current	4A
Max Forward Surge Current (Ifsm)	1A
Outside Diameter	1.85 mm
Height	4.56mm
Width	1.91mm
Radiation Hardening	No
Lead Free	Lead Free
Power Dissipation	500mW
Voltage - Forward (Vf) (Max) @ If	1V @ 10mA
Operating Temperature - Junction	-65°C~175°C
Voltage - DC Reverse (Vr) (Max)	100V
Forward Voltage	1V
Average Rectified Current	200mA
Peak Reverse Current	5µA
Capacitance @ Vr, F	4pF @ 0V 1MHz
Reverse Voltage	100V
Recovery Time	4 ns
Diameter	1.91mm
Length	4.56mm
REACH SVHC	No SVHC
RoHS Status	ROHS3 Compliant

Features of the 1N4148 Diode

Structure and Design

The 1N4148 diode prominently features the DO-35 glass package and is also offered in a surface-mount device (SMD) format. This design promotes durability and versatile placement within different circuit configurations. The preference for the DO-35 package arises from its dependable performance in preserving electrical fidelity across various thermal scenarios.

Electrical Characteristics

As a high-speed switching silicon epitaxial diode, the 1N4148 boasts impressive electrical properties. It supports a peak repetitive reverse voltage of 100V and accommodates an average current of up to 200mA. Such characteristics are desirable in scenarios demanding accurate and rapid electronic transitions. These features have proven effective in numerous applications in signal processing and high-speed electronics communication networks.

Thermal and Environmental Adaptability

The diode functions efficiently within an extensive temperature range, spanning from -65°C to 175°C. This range enables reliable performance across diverse environmental conditions. With extensive usage across industries, it is evident that the 1N4148 is well-adapted to settings that demand endurance against thermal challenges, such as in aerospace and automotive sectors. Its unwavering performance in such rigorous environments attests to its superior design and manufacturing quality.

Alternatives for the 1N4148 Diode

• 1N914

• 1N914A

• 1N914B

• 1N916

• 1N916A

• 1N916B

• 1N4448WS

• 1N4448

• 1N4148WS

Applications for the 1N4148 Diode

AC to DC Conversion

The 1N4148 diode plays a role in converting alternating current (AC) to direct current (DC) in power supplies. By ensuring current flows solely in one direction, it effectively rectifies AC, for consistent power delivery in various electronic devices. Its seamless integration in such systems shows its efficiency and inspires confidence in its use, reflecting the pursuit of optimal power performance in the industry.

Circuit Protection

Within the domain of circuit protection, the 1N4148 serves as a dependable shield against voltage spikes. Such spikes, triggered by switching operations or natural events like lightning, pose risks to sensitive electronic components. The diode acts as a buffer, safeguarding these components and enhancing the longevity of the circuits. This reflects the thoughtful design strategies aimed at fortifying electronic systems against unforeseen vulnerabilities.

Digital Logic Applications

In digital logic circuits, the 1N4148 is admired for its high switching speed and minimal forward voltage drop. It is well-suited for general switching and signal processing, meeting the demands for speed and precision in complex digital tasks. Component selection here highlights an industry trend towards enhancing computational efficacy and accuracy.

Battery Charger Integration

The 1N4148 diode's role in battery chargers showcases its importance in charge regulation and prevention of current backflow. This contributes to safe and efficient charging processes while offering protection to the battery itself. Integrating diodes in charging circuits demonstrates a nuanced understanding of energy management, aimed at extending battery longevity and ensuring safety.

Voltage Doubling Circuits

In voltage doubler circuits, the 1N4148 is instrumental in increasing effective voltage output without additional external sources. This is beneficial for applications that require higher voltage levels from low-voltage inputs. Utilizing such circuits points to an innovative approach in voltage management, addressing application-specific needs with efficiency and minimal resource utilization.

Swift Switching Operations

The 1N4148 diode stands out for its responsive nature and unwavering reliability amidst fluctuating conditions. Electronic systems frequently depend on this diode to navigate rapid transitions effectively. Its prowess in these circuits resonates beyond theoretical calculations, highlighting its role in achieving steady performances across various devices. The intrinsic focus on dependability makes it a compelling option for scenarios demanding precise timing.

General Switching Duties

For an array of switching applications, the 1N4148 diode garners attention due to its minimal forward voltage drop and adeptness at managing current flow. These characteristics empower it to excel in diverse switching tasks, delivering both stability and efficiency.

Rectification Processes

Beyond switching, the diode proves its mettle in rectification, adeptly converting AC to DC.

Protection in Electronic Components

The 1N4148 diode finds its place in circuits to protect sensitive electronics from potential voltage surges. This protective capacity transcends theoretical speculation; its widespread usage across numerous fields attests to its ability to avert potential damage.

Package for 1N4148

1N4148 Package

1N4148 Manufacturer Information

ON Semiconductor demonstrates an influence in the electronics sector by emphasizing the creation of energy-efficient designs for a range of applications, including automotive, industrial, and consumer electronics. Their strategic direction complements global sustainability goals and augments product durability and efficiency. A standout feature of their methodology is the relentless advancement of semiconductor technologies aimed at minimizing power usage while maintaining robust performance. Through enhancing these facets, ON Semiconductor stands as an example of how targeted innovation and robust organizational structures can create an environment where sustainability and technological excellence thrive, offering a template for others in the industry to aspire to.

Datasheet PDF

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Frequently Asked Questions [FAQ]

1. What are 1N4148 diode applications?

The 1N4148 diode is notably employed in sectors such as electronics and automotive industries. Its aptitude for high-speed rectification and effective switching in circuits drives its demand. Many tap into this diode's versatility to enhance performance and reliability in their circuit designs, a testament to their quest for efficiency in electrical components.

2. What is the forward voltage drop on 1N4148?

With a forward voltage drop close to 0.65V, the 1N4148 diode becomes valuable in low voltage applications. This parameter is key when aim to achieve meticulous voltage regulation while maintaining the circuit’s efficiency. It's a choice made to manage energy effectively without compromising function, adapting to various operational challenges.

3. What is the difference between a 1N4148 and a 1N4001?

Differences between the 1N4148 and 1N4001 diodes are often highlighted by their varying power and frequency capabilities. The 1N4148 thrives in high-frequency contexts, contrasting with the 1N4001's suitability for high-power scenarios. Others explore these distinctions to tailor solutions that meet the precise demands of intricate electronic systems.

4. Is there a 1N4148 zener diode?

Recognized for its swift switching capabilities of up to 100 MHz, the 1N4148 standard switching diode is important in applications necessitating rapid response times. Many leverage this feature to maximize efficiency in timing-critical environments, underscoring their pursuit of precision and responsiveness in complex applications.

5. What is the difference between a 1N4148 and a 1N914?

While the 1N4148 and 1N914 share numerous functions, the 1N4148 is often praised for having a lower leakage current, a characteristic varying with manufacturer outputs. This can provide an edge in specific scenarios, such as high-precision or low-power settings. Decisions in diode selection rely heavily on these subtle variations to achieve the desired circuit excellence.

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