3528 SMD LED bi-color LED diode

Series No:




3.5 x 2.8 x 1.9


SMD 3528





Revolutionizing Multi-Color LED Applications with 3528 SMD Bi-Color LED Diodes

In today’s tech-driven market, the demand for versatile and efficient lighting solutions is more pronounced than ever. The 3528 SMD LED bi-color LED diode represents a significant advancement in this field, blending functionality with innovation. Known as LED SMD 3528, this component is critical in applications requiring compact, multi-functional light sources. This detailed article explores the features, applications, benefits, and real-world impact of these bi-color LEDs through comprehensive case studies and testimonials.

Unpacking the Features of the 3528 SMD LED Bi-Color Diode

The 3528 SMD LED bi-color diode, often associated with the SMD2835 model for its similar footprint, offers the unique capability of emitting two distinct colors from a single diode without the need for multiple packages. This functionality allows for simplified design processes and enhanced product aesthetics. The compact size and dual-color output make it an ideal choice for space-sensitive applications where multiple lighting options are needed.

Diverse Applications of 3528 SMD Bi-Color LEDs

The versatility of the 3528 SMD bi-color LED extends its usability across various sectors:

  • Consumer Electronics: Utilized in devices like smartphones, laptops, and tablets for status indicators and keyboard backlighting.
  • Automotive: Incorporated in dashboard and control panels for backlighting and warning signals.
  • Industrial Controls: Used in machinery and equipment for fault indication and operational status alerts.

Advantages of Using 3528 SMD Bi-Color LEDs

Opting for 3528 SMD bi-color LEDs brings several significant benefits:

  • Enhanced Design Flexibility: Allows designers to integrate dual-color indicators into products without increasing the footprint.
  • Cost Efficiency: Reduces the number of components required on PCBs, which lowers manufacturing costs.
  • Energy Efficiency: These LEDs are designed to consume less power, which is crucial for battery-operated devices.

Case Studies: Real-World Impact of 3528 SMD Bi-Color LEDs

One compelling case study involves a major consumer electronics manufacturer that integrated 3528 SMD bi-color LEDs into their new line of portable devices. This integration allowed the devices to display multiple status indicators using the same LED, which was instrumental in reducing the device’s overall size and enhancing its user interface.

User Testimonials: Endorsements from Professionals

Professionals across the electronics industry have praised the 3528 SMD bi-color LEDs for their reliability and the versatility they bring to product design. An R&D manager from an automotive firm noted, “The 3528 SMD bi-color LEDs have allowed us to streamline our dashboard designs, reducing complexity and improving the aesthetic appeal.”

The Role of LED Indicator Lights in Modern Electronics

LED indicator lights, particularly those using 3528 SMD bi-color LEDs, play a crucial role in user interfaces by providing clear and immediate visual feedback. These indicators are essential for safety and efficiency in automotive, aerospace, and industrial applications, where clear communication of system status is vital.

Conclusion: Why Choose 3528 SMD Bi-Color LEDs for Your Next Project?

The 3528 SMD LED bi-color diode stands out as a superior choice for modern electronic applications that require reliable, multi-functional, and efficient lighting solutions. Whether you are an engineer, designer, or electronics purchaser, these LEDs offer a competitive edge by enhancing the functionality and design flexibility of your products. Consider integrating 3528 SMD bi-color LEDs into your projects to harness their full potential and drive innovation in your designs.

3528 SMD LED bi-color LED diode
3528 SMD LED bi-color LED diode


  • 3.5mm x 2.8mm SMD Bi-Color, 1.9mm Thickness, PLCC4 Package: This Surface-Mount Device (SMD) LED is compact and housed in a PLCC4 (Plastic Leaded Chip Carrier) package, making it suitable for various applications where space is limited.
  • Bi-Color Type: The LED can emit two different colors, providing versatility in signaling and display applications.
  • Compatible with Automatic Placement Equipment: Designed for compatibility with automated assembly systems, allowing for efficient, high-speed placement and soldering on circuit boards.
  • Wide Viewing Angle: Offers a broad range of visibility, making the LED effective for applications where it needs to be visible from different angles.
  • Ideal for Backlight and Indicator: Well-suited for use as a backlight in various types of displays or as a multi-colored indicator in electronic devices.
  • Packaged 2,000 Pieces per Reel: Supplied in reels of 2,000 pieces, optimizing manufacturing efficiency and facilitating ease of bulk handling.
  • RoHS Compliance: Manufactured in compliance with the Restriction of Hazardous Substances directive, ensuring reduced environmental impact and safety in use.


  • Backlighting in Electronics: Suitable for backlighting displays in devices such as digital watches, handheld gaming devices, and remote controls where dual-color indication is beneficial.
  • Indicator Lights: Ideal for use as status or warning lights in consumer electronics, automotive dashboards, and industrial control panels.
  • Consumer Electronics: Can be used in personal electronic devices like smartphones and tablets for dual-color notification lights.
  • Automotive Lighting: Appropriate for interior lighting solutions in vehicles, including dashboard illumination and signal indicators.
  • Portable Electronics: Given its compact size and dual-color functionality, it’s suitable for portable devices like wearables and handheld gadgets.
  • Control Panels: Useful in control panels for machinery and equipment, providing clear, multi-color indication and backlighting.
  • Medical Devices: Applicable in medical instruments for dual-color status indicators, where reliability and clear visibility are essential.
  • Decorative and Architectural Lighting: Suitable for decorative lighting in interior design and architectural projects where dual-color lighting can enhance aesthetics.

RoHs Compliance, Pb-free              Anti-Static Attention

Electrical-optical characteristics:
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Package configuration & Internal circuit diagram
3528 SMD LED bi-color 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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