3528 SMD photo diodes led diode

Series No:




3.5 x 2.8 x 1.9


SMD 3528





Mastering Light Detection: The Versatility of 3528 SMD Photodiodes

In the intricate world of electronic components, the 3528 SMD photodiode stands out as a fundamental device for detecting and managing light. Widely known as SMD 3528, this type of photodiode offers unmatched precision in light detection, making it indispensable in various high-tech applications. This article will delve deeply into the features, applications, and benefits of 3528 SMD photodiodes, supplemented by case studies and testimonials that showcase their impact and utility in the electronics industry.

Unveiling the Features of 3528 SMD Photodiodes

The 3528 SMD photodiode, synonymous with efficiency and precision, is engineered to convert light into electrical signals with remarkable accuracy. Its compact form factor makes it an ideal choice for space-constrained applications where precise light measurement is crucial. The photodiode operates across a broad spectrum of light wavelengths, providing versatility in its use across different technologies and industries.

Diverse Applications of SMD 3528 Photodiodes

Photodiodes, especially the 3528 SMD variant, are crucial in numerous applications:

  • Optical Communication Systems: They play a pivotal role in fiber optic networks, where they convert light signals into electrical data.
  • Consumer Electronics: Used in devices such as digital cameras and barcode scanners to enhance accuracy and functionality.
  • Healthcare Equipment: Integral in medical devices for diagnostic procedures that involve light sensing, such as pulse oximeters.

Advantages of Employing 3528 SMD Photodiodes

Integrating 3528 SMD photodiodes into electronic systems brings several significant benefits:

  • High Sensitivity: These photodiodes are highly responsive to light, which allows for quick and accurate readings.
  • Durability: Built to last, they offer a reliable solution for applications requiring prolonged use.
  • Energy Efficiency: They require minimal power to operate, which helps in developing energy-efficient products.

Case Studies: Effective Implementation of SMD 3528 Photodiodes

A notable case study involves a telecommunications company that utilized 3528 SMD photodiodes to upgrade their optical network. The implementation of these photodiodes enabled faster data transmission and greater reliability, leading to enhanced service quality and customer satisfaction.

User Testimonials: Validation from Industry Professionals

The feedback from users who have implemented 3528 SMD photodiodes in their projects consistently highlights the product’s reliability and performance. An electronics development manager remarked, “The 3528 SMD photodiodes have transformed our optical systems, providing faster and more accurate responses than ever before.”

Exploring the Synergy Between Photodiodes and Advanced Technologies

Beyond their traditional applications, 3528 SMD photodiodes are also being integrated into emerging technologies such as autonomous vehicles and smart lighting systems, where precise light detection is critical for functionality and safety.

Conclusion: The Future Is Bright with 3528 SMD Photodiodes

The 3528 SMD photodiode is more than just a component; it’s a pivotal element in the advancement of modern technology. With its ability to precisely detect and manage light, it has become a cornerstone in numerous electronic applications. For engineers, designers, and purchasers in the electronics field, adopting 3528 SMD photodiodes can lead to significant enhancements in product design and functionality. Embrace the capabilities of these powerful devices and propel your projects into a new era of innovation and efficiency.

3528 SMD photo diodes led diode
3528 SMD photo diodes led diode


  • 3.5mm x 2.8mm SMD, 1.9mm Thickness, PLCC2 Package: This compact Silicon Photo Diode is housed in a PLCC2 package, making it suitable for high-density electronic applications.
  • Choice of Various Viewing Angles: Available in different viewing angles to suit various application needs, allowing for flexibility in design and usage.
  • Diffused and Water Clear Lens Options: The diodes come with either diffused or water clear lens options, offering a choice between softer light diffusion and clearer, more direct light.
  • Fast Response Time: Designed for quick response to light changes, making them ideal for applications requiring rapid detection.
  • High Photo Sensitivity: Exhibits high sensitivity to light, ensuring effective performance in light detection applications.
  • Small Junction Capacitance: The low capacitance results in faster response times and better frequency characteristics.
  • IR Filter Epoxy Package: The epoxy packaging of the diode acts as an infrared filter, spectrally matched to Gallium Arsenide (GaAs) or Gallium Aluminum Arsenide (GaAlAs) infrared emitters.
  • Packaging: 2,000 Pieces per Reel: Supplied in reels containing 2,000 pieces, optimizing for bulk manufacturing and handling.
  • RoHS Compliance: Manufactured in compliance with the Restriction of Hazardous Substances directive, ensuring reduced environmental impact.


  • Light Detection in Consumer Electronics: Can be used in a variety of consumer electronics for ambient light sensing or proximity detection.
  • Optical Switches: Suitable for use in optical switching applications where rapid response to light presence or absence is needed.
  • Automatic Brightness Control: Ideal for systems that require automatic brightness adjustment based on ambient light conditions, such as in smartphones and tablets.
  • Security and Surveillance Systems: Used in security systems for beam interruption detection or in surveillance equipment.
  • Medical Devices: Applicable in medical devices that require light detection or measurement, such as pulse oximeters.
  • Industrial Automation: Can be used in industrial sensors for detecting light changes or presence in automation processes.
  • Automotive Sensors: Suitable for automotive applications, including light-based proximity sensors and automatic headlight control systems.
  • Communication Devices: Utilized in optical communication devices for detecting light signals.

RoHs Compliance, Pb-free              Anti-Static Attention

Electrical-optical characteristics:
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Package configuration & Internal circuit diagram
3528 SMD photo diodes 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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