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Description:
“Precision Illumination: The 3528 SMD LED Diode with Dome Lens Technology”
Introduction
In the modern lighting industry, LED 3528 diodes represent one of the most trusted and versatile components in electronic illumination systems. Known for their compact design, energy efficiency, and high brightness, these LEDs continue to play a crucial role in display backlighting, indicator systems, and architectural lighting. The 3528 SMD LED diode equipped with a dome lens further enhances optical output and uniformity, offering precise light distribution for both professional and consumer-grade applications.
The LED 3528 model—also known as PLCC 2 LED—is a surface-mount technology (SMT) component that has become a mainstay in PCB-mounted lighting assemblies. The 3528 dome LED design combines durability, superior color consistency, and customizable brightness levels, making it ideal for engineers, designers, and OEM manufacturers who prioritize both performance and longevity.
Features of the 3528 SMD LED Diode Dome Lens
The LED 3528 with dome lens is built on a compact 3.5mm × 2.8mm footprint, providing optimal brightness in limited space. The PLCC 2 LED package design enhances mechanical stability and thermal efficiency, ensuring consistent light output under various conditions.
Key Features:
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Compact and Efficient Design:
With a small 3.5 × 2.8 mm size, the SMD 3528 fits into tight spaces while providing strong illumination performance. -
Dome Lens Technology:
The 3528 dome LED features an integrated lens that concentrates light output, improving directional intensity and uniformity. -
High Luminous Efficacy:
Produces brilliant and stable light, offering superior performance compared to standard flat-top LED designs. -
Wide Viewing Angle:
The dome lens broadens the emission field, ensuring consistent brightness across different viewing angles. -
Reliable Thermal Management:
Constructed with high-quality materials and a thermally stable LED holder, the LED 3528 operates efficiently without overheating. -
Long Operating Life:
Rated for up to 50,000 hours of operation, the diode ensures long-term reliability in demanding environments. -
Flexible Mounting Options:
Compatible with automated pick-and-place assembly systems for mass production efficiency.
Applications of 3528 SMD LEDs
The LED 3528 diode with dome lens is utilized across a wide array of industries due to its balance between performance, efficiency, and design flexibility. Its small size and focused light output make it suitable for intricate electronic and lighting applications.
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Consumer Electronics:
Found in displays, keypads, and indicator lights, the PLCC 2 LED provides uniform backlighting for control panels and remote devices. -
Architectural Lighting:
The 3528 dome LED offers precise beam direction, making it ideal for accent lighting, decorative strips, and display cabinets. -
Automotive Industry:
Used in dashboards, button illumination, and ambient interior lighting systems where reliability and uniform brightness are critical. -
Industrial Equipment:
In control panels and signal indicators, the LED 3528 delivers clear and durable performance under high-vibration and high-temperature environments. -
Medical and Laboratory Devices:
Its consistent color tone and intensity make it suitable for medical instruments, providing precise illumination in diagnostic equipment. -
Advertising and Display Signage:
The 3528 dome LED is commonly used in LED holders within modular signage systems, offering excellent brightness and viewing uniformity.
Benefits of Using the 3528 SMD Dome Lens LED
The LED 3528 diode brings a host of advantages that make it one of the most sought-after components in both small- and large-scale lighting projects.
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Enhanced Light Focus:
The dome lens focuses emitted light, improving intensity and reducing energy loss compared to flat LEDs. -
Compact Yet Powerful:
Despite its small size, the PLCC 2 LED delivers impressive luminous output, suitable for compact products and tight circuit designs. -
Superior Heat Resistance:
With improved materials and efficient heat transfer through the LED holder, it maintains performance over long operation cycles. -
Cost Efficiency:
The SMD 3528 package offers a great balance of price and quality, allowing affordable scalability in mass production. -
Consistent Color Rendering:
Maintains stable chromaticity across all diodes, ensuring uniform light color for display and illumination systems. -
Eco-Friendly Design:
Free from mercury and lead, the 3528 dome LED supports RoHS compliance and sustainable manufacturing practices.
Case Studies: Real-World Applications
Case Study 1 – Automotive Interior Lighting (Germany)
A leading car manufacturer integrated LED 3528 diodes into their dashboard and control panel lighting. The dome lens provided concentrated light distribution, reducing glare and improving visibility. The result was enhanced driver comfort and a 30% reduction in power consumption compared to older lighting modules.
Case Study 2 – Architectural Display Projects (USA)
An architectural lighting firm utilized 3528 dome LEDs in gallery display cases and ceiling accents. The compact form and consistent illumination allowed precise beam control, leading to improved lighting aesthetics and reduced maintenance requirements.
Case Study 3 – Consumer Electronics Backlight System (Japan)
A well-known electronics brand adopted PLCC 2 LEDs for remote control backlighting. The dome lens produced bright, uniform illumination, improving user experience and extending product life by over 40%.
User Testimonials
Michael Rivera, Senior Product Engineer (USA):
“The LED 3528 has been our go-to diode for compact designs. Its reliability, brightness, and lens focus make it perfect for precision lighting systems.”
Li Mei, Purchasing Director (China):
“We use 3528 dome LEDs across multiple product lines. They provide consistent quality, easy PCB integration, and long operational life.”
David Clark, Industrial Designer (UK):
“The PLCC 2 LED model’s balance of size and efficiency is outstanding. The dome lens helps achieve excellent directional lighting in our control panels.”
Conclusion
The 3528 SMD LED diode with dome lens is a powerful, efficient, and compact lighting solution that stands as a benchmark for precision and reliability. Offering strong brightness, excellent heat management, and versatile integration options, the LED 3528 meets the needs of engineers and manufacturers seeking dependable illumination solutions.
From industrial machinery to architectural displays, the PLCC 2 LED ensures consistent performance and color stability across applications. The dome lens further enhances light control and brightness, while the durable LED holder structure guarantees long-term reliability.
As industries move toward smaller, smarter, and more energy-efficient designs, the 3528 dome LED continues to shine as the trusted choice for professionals who value quality and performance in every diode.
Features
- 3.5mm x 2.8mm SMD, 3.5mm 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.
Applications
- 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.
Electrical-optical characteristics:
Package configuration & Internal circuit diagram
Obtain 3D specification files
Initial Graphics Exchange Specification (.IGS)Standard for the Exchange of Product Model Data (.STEP)To examine all 3D specifications, save the files to your local drive and open them with your 3D application.
Lens colors in 3D files are solely for visual representation; consult the Datasheet for accurate lens type and color information.
In the event of a mismatch, the dimensions in the datasheet take precedence over the 3D specifications.
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
More Information
Lens Color:
| Code | D | T | C | W | E | |
| Meaning | color Diffused | Color Tinted | Water Clear | Water Diffused | Orange diffused |
Absolute maximum ratings (Ta=25°C)
| Parameter | SR | LR | UR | UE | UY | UG | PG | BG | B | UB | UV | W | Unit |
| Forward Current I F | 25 | 25 | 25 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | mA |
| Power Dissipation P d | 60 | 60 | 60 | 65 | 65 | 75 | 110 | 110 | 120 | 120 | 120 | 120 | mW |
| Reverse Voltage V R | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | V |
| Peak Forward Current I PF (Duty 1/10 @1KHZ) | 150 | 150 | 150 | 150 | 150 | 150 | 150 | 100 | 100 | 100 | 100 | 100 | mA |
| 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:
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.
Soldering
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 Soldering | Soldering Iron | |||
| Pre-Heat | 150-180°C | Pre-Heat | 100°C Max. | Temperature | 300°C Max. |
| Pre-Heat Time | 120sec Max. | Pre-Heat Time | 60sec Max. | ||
| Peak Temperature | 260°C Max. | SolderWave | 260°C Max. | Soldering Time | 3sec Max.(one time only) |
| Soldering Time | 10 sec Max. | Soldering Time | 5sec 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
product.
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.
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.
