3mm LED diode

Series No:





3 x 3.9 x 5.3






Introduction to 3mm LED Diodes

LED diodes, particularly the 3mm variant, are at the forefront of lighting technology, offering an array of colors, including the vibrant led 3 mm spectrum. Their prominence in electronics is underscored by their widespread applications, from indicator lights to complex led circuits. This section unfolds the essence of 3mm LED diodes, setting the stage for a deeper exploration of their capabilities.

Features of 3mm LED Diodes

3mm LED diodes are celebrated for their miniature size, energy efficiency, and the bright light they emit. These attributes make them ideal for a multitude of applications, from simple DIY projects to sophisticated commercial products. The essence of these diodes lies in their versatility, capable of being integrated into various led circuits, enhancing both functionality and aesthetics.

Applications of 3mm LED Diodes

The applications of 3mm LED diodes are vast and varied, spanning across sectors. They illuminate dashboards, serve as power indicators, and bring to life the pages of electronics with their glow. In led circuits, these diodes not only provide visual feedback but also contribute to energy conservation, marking their significance in sustainable electronics design.

Benefits of 3mm LED Diodes

The adoption of 3mm LED diodes brings forth a spectrum of benefits. Their energy-efficient nature not only spells savings in power consumption but also aligns with green electronics principles. Moreover, their longevity and durability reduce the need for frequent replacements, offering an economical advantage over traditional lighting solutions.

Case Studies: Illuminating Success with 3mm LED Diodes

This section showcases case studies that highlight the transformative impact of 3mm LED diodes across industries. From enhancing the user interface of consumer electronics to facilitating advanced lighting solutions in automotive design, these diodes have proven their worth, illustrating their role in driving innovation.

User Testimonials: Voices from the Field

Hearing from those who have firsthand experience with 3mm LED diodes adds a layer of authenticity and insight. User testimonials from engineers who have integrated these diodes into their projects, and administrators who have overseen their procurement, underscore the practical benefits and satisfaction derived from their use.

Conclusion: The Bright Future of 3mm LED Diodes

The exploration of 3mm LED diodes paints a picture of a component that is both foundational and futuristic. Their role in the advancement of electronics is undeniable, offering a blend of efficiency, versatility, and sustainability. As the electronics industry continues to evolve, the significance of incorporating 3mm LED diodes into designs remains paramount. Embrace the potential of these compact yet powerful components to illuminate the path toward innovation and efficiency.

Call to Action: Dive into the world of 3mm LED diodes and discover how they can transform your electronics projects or products. Harness their potential to create solutions that are not only innovative but also sustainable and efficient.

3mm LED diode
3mm LED diode


  • 3.0mm Round Type: The standard size of 3.0mm in diameter makes these LEDs compatible with many devices and applications, offering flexibility in design.
  • Choice of Various Viewing Angles: Available in different viewing angles to cater to specific requirements, ensuring optimal visibility and light distribution for diverse applications.
  • Lens Options: Offered with diffused, transparent, and water-clear lenses. The diffused lens provides a softer light spread, the transparent lens gives a more focused light output, and the water-clear lens allows for the most direct and intense light.
  • IC Compatibility / Low Current Capability: These LEDs can be easily integrated with integrated circuits, making them suitable for complex electronic designs. Their low current operation enhances energy efficiency, which is beneficial for battery-powered and energy-saving applications.
  • RoHS Compliance: Adheres to environmental and safety standards, ensuring the use of materials that are safe and environmentally friendly.


  • Indicator Lights: Commonly used in electronic devices, control panels, and appliances to indicate power status, operational states, or warnings.
  • Backlighting: Utilized for backlighting in LCD displays, keypads, and control panels.
  • Consumer Electronics: Integrated into various consumer electronics for display or decorative purposes.
  • Automotive Lighting: Employed in vehicle dashboards, signal lights, or as part of interior and exterior decorative lighting.
  • Toys and Novelty Items: Used in toys and novelty items to add visual appeal and functionality.
  • Signal and Signage Applications: Incorporated in digital billboards, traffic signals, and signage for their visibility and durability.
  • DIY Projects and Hobby Electronics: Popular in DIY electronics and hobby projects due to their versatility and ease of use.
  • Decorative Lighting: Used in decorative lighting installations in homes, commercial spaces, and events.

RoHs Compliance, Pb-free              Anti-Static Attention

Electrical-optical characteristics:
Filters Sort results
Reset Apply
Article No
Ultra Bluish Green
Water Clear
Super Red
Water Clear
Ultra Pure Green
Water Clear
Hi Red
Water Clear
Ultra Blue
Water Clear
Ultra Orange
Water Clear
Ultra Green
Water Clear
Ultra Red
Water Clear
Ultra White
Water Clear
Ultra Yellow
Water Clear
Water Clear
Package configuration & Internal circuit diagram
3mm LED diode

All dimensions are in millimeters(inches)
Tolerance is +-0.25(0.01″) unless otherwise note
Specifications are subject to change without notice.

Partno description:

LEDs, Light Emitting diodes, which include various small kinds, such as 3mm, 5mm, 8mm, 10mm; round type, rectangular type square type, tower type, Oval led, elliptical, flat top; SMDs, high power led, piranha LEDs

Part No of  LED diode

More Information

Lens Color:

Meaningcolor DiffusedColor TintedWater ClearWater DiffusedOrange diffused 

Absolute maximum ratings (Ta=25°C)

Forward Current I F252525303030303030303030mA
Power Dissipation P d606060656575110110120120120120mW
Reverse Voltage V R555555555555V
Peak Forward Current I PF (Duty 1/10 @1KHZ)150150150150150150150100100100100100mA
Operation Temperature T OPR-40 to +80°C
Storage Temperature T STG-40 to +85°C
Lead Soldering Temperature T SOL  Max.260+-5°C for 3 sec Max. (1.6mm from the base of the epoxy bulb)°C
Related Information

Applied for:
auto lampcameradome lightrgb screentraffic light


The LEDs described here are intended to be used for ordinary electronic equipment (such as office equipment, 

communication equipment and household applications). Consult Betlux’s Sales in advance for information on 

applications in which exceptional reliability is required, particularly when the failure or malfunction of the LEDs

 may directly jeopardize life or health (such as in aviation, transportation, traffic control equipment, medical 

and life support systems and safety devices).

CAUTIONS for Through-Hole LED Lamps

1. Application
The LEDs described here are intended to be used for ordinary electronic equipment (such as office equipment, communication equipment and household applications). Consult Betlux’s Sales in advance for information on applications in which exceptional reliability is required, particularly when the failure or malfunction of the LEDs may directly jeopardize life or health (such as in aviation, transportation, traffic control equipment, medical and life support systems and safety devices).

2. Storage
The storage ambient for the LEDs should not exceed 30℃ temperature or 70% relative humidity. It is
recommended that LEDs out of their original packaging are used within three months
For extended storage out of their original packaging, it is recommended that the LEDs be stored in a sealed
container with appropriate desiccant or in a desiccator with nitrogen ambient.

3. Cleaning
Use alcohol-based cleaning solvents such as isopropyl alcohol to clean the LED if necessary

4. Lead Forming & Assembly
During lead forming, the leads should be bent at a point at least 3mm from the base of LED lens. Do not use
the base of the leadframe as a fulcrum during forming.
Lead forming must be done before soldering, at normal temperature.
During assembly on PCB, use minimum clinch force possible to avoid excessive mechanical stress.

led diode formingassembly notice of led diode


When soldering, leave a minimum of 2mm clearance from the base of the base of the lens to the soldering point. Dipping the lens into the solder must be avoided.

Do not apply any external stress to the lead frame during soldering while the LED is at high temperature.

Recommended soldering conditions:


IR Reflow Soldering (for SMD display)Wave SolderingSoldering Iron
Pre-Heat150-180°CPre-Heat100°C Max.Temperature300°C Max.
Pre-Heat Time120sec Max.Pre-Heat Time60sec Max.
Peak Temperature260°C Max.SolderWave260°C Max.Soldering Time3sec Max.(one time only)
Soldering Time10 sec Max.Soldering Time5sec Max.

Note: Excessive soldering temperature and/or time might result in deformation of the LED lens or failure of the LED

ESD(Electrostatic Discharge)

Static Electricity or power surge will damage the LED.

Suggestions to prevent ESD (Electrostatic Discharge):

n Use a conductive wrist band or anti-electrostatic glove when handling these LEDs

n All devices, equipment, and machinery must be properly grounded

n Work tables, storage racks, etc. should be properly grounded

n Use ion blower to neutralize the static charge which might have built up on surface of the LED’s

 plastic lens as a result of friction between LEDs during storage and handling

ESD-damaged LEDs will exhibit abnormal characteristics such as high reverse leakage current, 

low forward voltage, or “no light on” at low currents. To verify for ESD damage, check for “light on” 

and Vf of the suspect LEDs at low currents.

The Vf of “good” LEDs should be>2.0V@0.1mA for InGaN product and >1.4V@0.1mA for AlInGaP


antistatic notice-smd led

Drive Method

An LED is a current-operated device. In order to ensure intensity uniformity on multiple LEDs connected in 

parallel in an application, it is recommended that a current limiting resistor be incorporated in the drive circuit,

 in series with each LED as shown in Circuit A below.

drive notice - led diode

When selecting power for LED systems, it’s essential to understand several key parameters to ensure safe operation, longevity, and optimal performance. Here are some steps and considerations for LED power selection:

  • Determine the Forward Voltage (Vf) of the LED(s):

Each LED has a forward voltage, which is the voltage at which the LED operates when the current is flowing through it. This value can typically be found in the LED’s datasheet.

  • Determine the Forward Current (If) of the LED(s):

The forward current is the current at which the LED is designed to operate. Running an LED at higher than its rated current can reduce its lifespan and increase the heat it produces.

  • Decide on the Configuration:

Series Configuration: When LEDs are connected in series, the forward voltages add up, but the current remains the same.

Parallel Configuration: When LEDs are connected in parallel, the forward voltage remains the same, but the currents add up. This configuration can be risky because if one LED fails or has a slightly lower forward voltage, it can cause the other LEDs to draw more current.

Calculate Total Power Requirements:

Power (W) = Total Forward Voltage (V) x Total Forward Current (A)

For example, if you have three LEDs connected in series, each with a forward voltage of 3V and a forward current of 20mA, the total power requirement would be:

Power = (3V + 3V + 3V) x 20mA = 9V x 0.02A = 0.18W

  • Select an Appropriate Power Supply:
  • Voltage Rating: The power supply voltage should match or slightly exceed the total forward voltage of your LED configuration.
  • Current Rating: The power supply’s current rating should meet or exceed the total forward current of your LED configuration.
  • Safety Margin: It’s a good practice to select a power supply that can provide at least 20% more power than your calculated requirement. This ensures the power supply isn’t operating at its maximum capacity, which can extend its life and ensure safer operation.
  • Consider Additional Features:
  • Dimming Capability: If you want to control the brightness of your LEDs, choose a power supply with dimming capabilities.
  • Overcurrent and Overvoltage Protection: To protect your LEDs, select a power supply with built-in protection mechanisms.
  • Thermal Management: Ensure that the power supply has adequate cooling, especially if it will be enclosed or in a location with limited airflow.
  • Regulation and Efficiency:A power supply with good regulation will maintain a consistent voltage output despite variations in the load. High efficiency ensures minimal power is wasted as heat.
  • Physical Size and Form Factor:Depending on where you plan to place the power supply, its size and shape may be critical factors.

In summary, when selecting power for LED systems, understanding your LED’s requirements and the configuration you plan to use is essential. Then, pick a power supply that meets those needs with some added safety margin, keeping in mind any additional features or constraints relevant to your project.

Here are some well-regarded brands in the industry:

  • Mean Well: One of the most recognized brands in the LED power supply industry, Mean Well offers a wide range of products suitable for both indoor and outdoor applications. Their units often come with features like overcurrent protection, dimming capabilities, and high efficiency.
  • Tridonic: A global leader in lighting technology, Tridonic offers LED drivers and power supplies that cater to various lighting solutions, from simple setups to advanced smart lighting systems.
  • Philips Advance Xitanium: Philips is a well-known brand in the lighting industry, and their Xitanium series of LED drivers are known for reliability and performance. They cater to both indoor and outdoor LED applications.
  • Osram: Another giant in the lighting industry, Osram offers a range of LED drivers and power supplies suitable for various applications, including architectural and street lighting.
  • LIFUD: Specializing in LED drivers, LIFUD is known for its high-quality products that cater to both commercial and residential LED lighting solutions.
  • MOSO: This brand offers a variety of LED drivers, especially for outdoor and industrial applications. Their products are known for durability and performance.
  • TDK-Lambda: With a history in power electronics, TDK-Lambda offers a range of power supplies and LED drivers suitable for various applications, emphasizing reliability and advanced features.
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