3528 SMD led diode, reverse mount

Series No:




5.2 x 2.8 x 1.8


SMD 3528





Revolutionizing Design with 3528 SMD LED Diodes: The Advantages of Reverse Mount Technology

In the world of electronics manufacturing, the ability to innovate within compact spaces can significantly enhance product design and functionality. The 3528 SMD LED diode, particularly when configured for reverse mounting, represents a substantial leap in this direction. Known widely among engineers for their efficiency and compactness, these surface mount LEDs, including variants like the SMD 2835, provide essential solutions for a broad range of applications. This detailed exploration covers the unique features, applications, benefits, and real-world effectiveness of reverse mount 3528 SMD LEDs, enriched by user testimonials and case studies.

Key Features of Reverse Mount 3528 SMD LED Diodes

The reverse mount configuration of the 3528 SMD LED diodes allows for light to be emitted from the bottom of the LED, which is mounted facing away from the light-emitting side. This design is particularly advantageous for creating uniform backlighting effects in constrained spaces, as it allows the light to be directed towards reflective surfaces or diffusers more efficiently. Known for their robustness and reliability, these LEDs are also favored for their cool operation and long service life.

Applications of Reverse Mount 3528 LEDs

Reverse mount technology in 3528 LEDs opens up several innovative applications:

  • Consumer Electronics: Utilized in devices such as smartphones, tablets, and laptops for backlighting screens and keyboards.
  • Automotive: Employed in dashboard backlighting, where space is limited and illumination needs to be directed precisely.
  • Signage and Display: Ideal for creating even lighting in advertising signs and ambient lighting in retail spaces.

Benefits of Using Reverse Mount SMD LEDs

The adoption of reverse mount 3528 SMD LEDs offers numerous benefits:

  • Enhanced Aesthetics: Provides more consistent and controlled lighting, crucial for devices where design and visual appeal are priorities.
  • Space Efficiency: Because the light is emitted in the opposite direction of the mounting surface, these LEDs are perfect for thin and compact product designs.
  • Improved Heat Dissipation: The unique mounting style helps dissipate heat more effectively, extending the life of the LED and maintaining its efficiency.

Case Studies: Demonstrating the Effectiveness of Reverse Mount LEDs

A compelling case study from the consumer electronics industry involves a leading smartphone manufacturer that incorporated reverse mount 3528 LEDs into their latest model. This integration allowed for a thinner phone design without compromising on screen brightness or uniformity, significantly enhancing the user experience and setting new standards in smartphone design.

User Testimonials: Insights from Industry Professionals

Professionals in the electronics sector frequently praise the reverse mount 3528 LEDs for their performance and versatility. An engineering manager from a major automotive company noted, “The reverse mount 3528 LEDs have allowed us to overcome design challenges in vehicle interior lighting, offering superior illumination while maintaining a sleek, modern look.”

Exploring the Future of RGB Surface Mount LEDs

The incorporation of RGB capabilities in surface mount LEDs, particularly in designs like the 3528, is pushing the boundaries of what is possible in LED lighting. These RGB LEDs are increasingly used in scenarios that require dynamic color changing, adding both functionality and allure to a wide array of products.

Conclusion: Why Choose 3528 SMD LEDs for Your Lighting Needs?

With their compact design, efficiency, and versatile application potential, 3528 SMD LED diodes in a reverse mount configuration are proving to be a game-changer in the electronics and lighting industries. For engineers, designers, and administrators looking to leverage advanced lighting solutions that combine aesthetic appeal with functional excellence, reverse mount 3528 LEDs offer an ideal choice. Embrace these innovative lighting solutions to enhance your projects and lead the way in technological advancements.

3528 SMD led diode, reverse mount
3528 SMD led diode, reverse mount


    • Compact size: 3.5mm x 2.8mm with a thickness of 1.9mm
    • Mono-color type with Ultra Brightness
    • Compatible with automatic placement equipment
    • Wide Viewing Angle for versatile applications
    • Ideal for Backlighting and Indicator purposes
    • Package includes 2,000 pieces
    • Reverse Mount design for specific installation requirements


    • Backlighting for electronic displays
    • Indicator lights on control panels
    • Automotive interior lighting
    • Illumination in consumer electronics
    • Status indicators in industrial equipment
    • Decorative lighting for signage
    • Backlighting for switches and buttons
    • Lighting solutions for wearable devices
    • Illumination in medical devices
    • Compact design for space-constrained applications

RoHs Compliance, Pb-free              Anti-Static Attention

Electrical-optical characteristics:
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Package configuration & Internal circuit diagram
3528 SMD led diode, reverse mount

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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