3528 SMD led diode

Series No:




3.5 x 2.8 x 1.9


SMD 3528





Innovations in LED Technology: Exploring the 3528 SMD LED Diode

In the evolving world of lighting technology, the 3528 SMD LED diode stands out as a versatile and efficient solution for a wide array of applications. Known also by its designation as the LED 2835, and often used in PLCC-2 configurations, this LED variant offers significant benefits, which have been instrumental in its adoption across various sectors. This article delves into the features, applications, and benefits of the 3528 SMD LED diode, enhanced by case studies and testimonials that highlight its effectiveness and versatility.

Key Features of the 3528 SMD LED Diode

The 3528 SMD LED diode, often referenced alongside its cousin the LED 2835, is renowned for its small size and high efficiency. As a PLCC-2 LED, it features a compact package that is easy to integrate into a variety of electronic circuits and devices. This LED type offers high luminous efficacy with a low power consumption, making it an environmentally friendly choice for designers and manufacturers focused on reducing their ecological footprint.

Diverse Applications of the 3528 SMD LED Diode

The adaptability of the 3528 SMD LED allows it to serve a multitude of applications:

  • General Lighting: Used in residential and commercial lighting for its balanced output and energy efficiency.
  • Automotive Lighting: Ideal for dashboard lights, interior enhancements, and exterior signals.
  • Portable Devices: Incorporated in the backlighting of phones, tablets, and other handheld devices due to its minimal power draw and compact size.

Benefits of Using 3528 SMD LEDs

Opting for 3528 SMD LEDs brings several advantages:

  • Energy Efficiency: These LEDs consume less energy, which translates to lower operational costs and a smaller carbon footprint.
  • Longevity: With a lifespan typically exceeding other lighting solutions, they offer long-term reliability.
  • Design Flexibility: The small size allows for innovative designs in space-constrained applications.

Case Studies: Success Stories with 3528 SMD LEDs

One impactful case study involves a tech company that integrated the 3528 LEDs into their new line of eco-friendly consumer electronics. The company reported a 25% reduction in energy consumption for their devices, attributing this improvement directly to the efficiency of the 3528 SMD LEDs.

User Testimonials: Real-World Impact

Engineers and developers often praise the 3528 SMD LED for its performance and adaptability. A product manager from a leading electronics manufacturer stated, “The 3528 SMD LED has allowed us to develop products that are not only more energy-efficient but also offer superior light quality compared to previous models.”

The Role of SmartLED Technology with 3528 LEDs

Incorporating SmartLED technology into systems using 3528 SMD LEDs is becoming increasingly popular. This integration allows for dynamic control of lighting systems, enhancing user interaction and energy savings. SmartLED applications are particularly effective in creating adaptive lighting environments that can change according to specific needs or conditions.

Conclusion: Why 3528 SMD LEDs Are the Future of Lighting

The 3528 SMD LED diode exemplifies the advancements in LED technology with its combination of efficiency, versatility, and durability. Its widespread adoption across industries is a testament to its capability to meet the demands of modern applications. Whether you are an engineer, designer, or an electronics purchaser, considering the 3528 SMD LED for your projects can lead to significant improvements in both performance and sustainability.

3528 SMD led diode
3528 SMD led diode


  • 3.5mm x 2.8mm SMD, 1.9mm Thickness, PLCC2 Package: This Surface-Mount Device (SMD) LED is compact, making it suitable for high-density mounting on circuit boards. Its PLCC2 (Plastic Leaded Chip Carrier) package ensures robustness and reliability.
  • Mono-Color Type with Ultra Brightness: Provides a single-color light output with high luminosity, ensuring clear visibility and strong illumination.
  • Compatible with Automatic Placement Equipment: Designed for seamless integration with automated assembly systems, enabling 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 seen from different angles.
  • Ideal for Backlight and Indicator: Well-suited for use as a backlight in display panels or as an indicator light in various electronic devices.
  • Packaged 2,000 Pieces per Reel: Supplied in reels of 2,000 pieces, facilitating bulk handling and automated assembly processes.
  • RoHS Compliance: Manufactured in accordance with the Restriction of Hazardous Substances directive, ensuring environmentally safer production and use.


  • Backlighting in Displays: Suitable for backlighting LCDs, control panels, and keypads in various electronic devices.
  • Indicator Lights in Electronics: Ideal for use as status or warning lights in consumer electronics, industrial machinery, and automotive applications.
  • Automotive Lighting: Appropriate for interior and exterior lighting solutions in vehicles, including dashboard lights, accent lighting, and external signal lights.
  • Portable Electronics: Given its small size and brightness, it’s well-suited for use in portable devices like smartphones, tablets, and wearable technology.
  • Control Panels: Useful in control panels for machinery and industrial equipment, providing clear indication and backlighting.
  • Medical Devices: Can be employed in various medical instruments for backlighting and status indicators, where reliability and clear visibility are essential.
  • Decorative and Architectural Lighting: Suitable for decorative lighting in interior design, architectural projects, and ambient lighting setups.
  • Safety and Emergency Equipment: Applicable in safety gear and emergency lighting due to its high visibility and compact design.

RoHs Compliance, Pb-free              Anti-Static Attention

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Package configuration & Internal circuit diagram
3528 SMD 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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