3mm LED diode

Series No:





3 x 3.8 x 6.1






The Luminous World of 3mm Yellow-Green LED Diodes

At the heart of countless electronic devices lies the 3mm LED diode, a testament to innovation in the field of light technology. The yellow-green variant of these diodes offers a unique blend of visibility and aesthetic appeal, making it a favored choice for a wide range of applications. Known among led manufacturers for its distinct color, the yellow-green LED combines the clarity of green with the warmth of yellow, providing an optimal solution for various signaling and decorative needs.

Key Features of Yellow-Green 3mm LED Diodes

  • Distinctive Color: The yellow-green LED stands out for its unique color, offering excellent visibility in a variety of lighting conditions.
  • Energy Efficiency: Like other LED diodes, the yellow-green variant is designed for low power consumption, contributing to energy-efficient electronic designs.
  • Compact Size: The 3mm form factor allows for integration into almost any device, ensuring that space constraints do not compromise the design or functionality.

Versatile Applications: From Indicators to Illuminators

The versatility of the yellow-green 3mm LED diode extends its use beyond mere indicators on electronic devices. These diodes are integral to traffic lights, emergency exit signs, and various consumer electronics, offering clarity and direction with their vivid hue. Furthermore, they are used in led light circuit boards for decorative lighting, adding a vibrant touch to both indoor and outdoor spaces.

Advantages of Integrating Yellow-Green 3mm LEDs

Choosing yellow-green 3mm LED diodes offers several benefits:

  • Enhanced Visibility: The yellow-green light is among the most visible colors to the human eye, making it ideal for safety and signaling applications.
  • Durability: These LEDs boast a long lifespan, reducing the need for frequent replacements and lowering maintenance costs.
  • Versatility: The broad application spectrum of the yellow-green LED diodes underscores their versatility, making them suitable for a wide range of uses from industrial to decorative.

Case Studies: Shining Examples of Success

A notable application involved the use of yellow-green 3mm LED diodes in a series of urban safety signs. The project significantly improved nighttime visibility and pedestrian safety, showcasing the diodes’ effectiveness in public safety initiatives.

User Testimonials: In Their Own Words

“Implementing the 3mm yellow-green LEDs in our latest range of portable devices has not only enhanced the products’ aesthetic appeal but also their usability,” shares a Product Manager from a leading electronics company. “The feedback from our customers has been overwhelmingly positive, highlighting the diodes’ visibility and distinctive look.”

Conclusion: Brightening the Future with Yellow-Green 3mm LEDs

The exploration into the world of 3mm yellow-green LED diodes reveals their critical role in advancing electronic design and technology. Offering a unique color, high efficiency, and compact size, these diodes serve as a beacon of innovation across various applications. As the electronics industry continues to evolve, the importance of integrating efficient, versatile components like the yellow-green 3mm LED diode becomes increasingly apparent.

Call to Action: Embrace the vibrant, efficient lighting solution offered by yellow-green 3mm LED diodes. Whether you’re an engineer designing the next generation of electronic devices or a purchaser seeking high-quality components, discover how these LEDs can illuminate your projects with their distinctive color and reliability.

3mm LED diode
3mm LED diode


  • 3.0mm Cylindrical LED Lamp: The cylindrical design provides a unique aesthetic and can be beneficial for specific applications requiring a more focused light distribution.
  • Various Viewing Angles: These LEDs come in different viewing angles, making them versatile for various applications where directionality of light is important.
  • Lens Options: Available with diffused, transparent, and water-clear lenses. Diffused lenses offer a softer light dispersion, transparent lenses provide a more defined light path, and water-clear lenses deliver the most direct and concentrated light output.
  • IC Compatibility / Low Current Capability: These LEDs are suitable for integration with integrated circuits, making them applicable for complex electronic designs. Their low current operation enhances energy efficiency, making them ideal for battery-powered devices.
  • RoHS Compliance: They meet strict environmental and safety standards, indicating that they are manufactured using materials that are safe and environmentally friendly.


  • Indicator Lights: Commonly used in electronics, appliances, and control panels to indicate power status, operational states, or alerts.
  • Backlighting: Suitable for backlighting in small displays, keypads, and control panels in various electronic devices.
  • Consumer Electronics: Used in portable electronics for indicators or aesthetic enhancements, such as in mobile phones, audio devices, and handheld gadgets.
  • Automotive Lighting: Employed in vehicle dashboards and instrumentation for indicators or backlighting.
  • Signal and Signage Applications: Incorporated into signal lights, digital billboards, and other signage for visibility and attention-grabbing purposes.
  • Toys and Novelty Items: Integrated into toys and novelty items, adding visual appeal and enhancing user interaction.
  • DIY Projects and Hobby Electronics: Popular in DIY and hobbyist projects due to their small size, ease of use, and versatility.
  • Decorative and Accent Lighting: Utilized in decorative applications for homes and commercial spaces, including mood lighting and artistic installations.

RoHs Compliance, Pb-free              Anti-Static Attention

Electrical-optical characteristics:
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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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