3522 Silicon Photo Diodes

Article No:






5.1 x 3 x 7.4


Product Series information
Filters Sort results
Reset Apply
Product Series
Series No:BL-L3522PD
Specification Download:
5.1 × 3 × 7.4 mm

Unlocking the Potential of 3522 Silicon Photo Diodes

At the forefront of light detection technology, 3522 Silicon Photo Diodes, or photodiodes, represent a significant advancement in optical sensors. These components are renowned for their ability to precisely detect and measure light intensity, making them indispensable in a wide array of applications, from simple light sensors to complex communication systems.

Core Features of 3522 Silicon Photo Diodes

  • High Sensitivity: These photodiodes excel in detecting a wide range of light wavelengths, ensuring accurate readings even in low-light conditions.
  • Rapid Response Time: The 3522 models boast fast response times, enabling real-time light measurement and rapid signal processing.
  • Durability: Designed for longevity, these photodiodes maintain their performance over extended periods, even in challenging environments.

Versatile Applications: Beyond Light Detection

The applications of 3522 Silicon Photo Diodes extend far beyond basic light sensing:
  • Optical Communication: They play a crucial role in fiber optic communication systems, converting light signals into electrical ones.
  • Medical Devices: Utilized in various medical instruments, including blood analysis machines, to accurately measure light and color intensities.
  • Safety and Security: Integrated into smoke detectors and security systems, offering reliable performance in critical applications.

Advantages of Employing 3522 Silicon Photo Diodes

Incorporating 3522 Silicon Photo Diodes into electronic designs offers several benefits:
  • Enhanced Precision: Their sensitivity to light ensures precise measurements, critical for applications requiring exact data.
  • Energy Efficiency: These diodes consume minimal power, contributing to the overall energy efficiency of the devices they're part of.
  • Compact Design: The small footprint of these photodiodes allows for their use in space-constrained applications, adding to their versatility.

Case Studies: Illuminating Success

A notable case study involves a leading telecommunications company that integrated 3522 Silicon Photo Diodes into their newest fiber optic communication system. The use of these diodes significantly improved data transmission rates and reliability, marking a breakthrough in optical communication technology.

User Testimonials: Voices from the Field

"We've experienced a remarkable improvement in our optical sensor products since we started using 3522 Silicon Photo Diodes," shares a senior engineer from a prominent electronics manufacturing firm. "Their reliability and precision have allowed us to push the boundaries of what we thought was possible in light detection."

Conclusion: Shaping the Future with 3522 Silicon Photo Diodes

The exploration of 3522 Silicon Photo Diodes reveals their crucial role in the evolution of modern electronics. With their unmatched sensitivity, rapid response, and durability, these photodiodes are setting new standards in light detection technology. As the electronics industry continues to evolve, the significance of integrating efficient, versatile components like the 3522 Silicon Photo Diodes becomes increasingly evident. Call to Action: Embrace the innovation and precision offered by 3522 Silicon Photo Diodes. Discover how these advanced components can elevate your projects, delivering unparalleled performance in light detection and beyond. Step into the future of electronics with confidence, powered by the capabilities of these exceptional diodes.
3522 Silicon Photo Diodes
3522 Silicon Photo Diodes


  • 5.1 x 3.0 x 7.4mm Silicon Photodiodes: Compact size, making them suitable for applications where space efficiency is a key factor.
  • Choice of Various Viewing Angles: Available in different viewing angles to cater to specific application needs, enhancing their adaptability in various design contexts.
  • Lens Options: Comes with diffused and water-clear lens options. Diffused lenses are ideal for applications requiring a softer response to light, while water-clear lenses are better for more direct and precise light detection.
  • Fast Response Time: Capable of rapidly responding to changes in light intensity, crucial for applications that require quick detection and reaction.
  • High Photo Sensitivity: Exhibits excellent sensitivity to light, ensuring accurate and efficient detection even in low-light conditions.
  • Small Junction Capacitance: Results in faster response times and better frequency performance, which is beneficial in high-speed applications.
  • Epoxy Package as IR Filter: The epoxy packaging of the photodiode acts as an infrared (IR) filter, providing spectral sensitivity suitable for specific IR applications.
  • RoHS Compliance: Adheres to the Restriction of Hazardous Substances Directive, indicating that they are environmentally friendly and safe for use in various applications.


  • Optical Sensors: Used in various optical sensing applications, such as light meters, barcode scanners, and position sensors.
  • Consumer Electronics: Employed in devices like digital cameras and light meters, where accurate light detection is crucial.
  • Industrial Measurement and Control: Integral to industrial applications for precision light measurement, including in robotics and automated machinery.
  • Communication Devices: Utilized in optical communication systems for detecting light signals, including fiber-optic data transmission.
  • Medical Devices: Used in medical diagnostics equipment, such as pulse oximeters, that rely on light sensing.
  • Environmental Monitoring: Employed in devices for monitoring light levels in environmental and scientific research applications.
  • Safety and Security Systems: Integral in security systems like smoke detectors and intrusion sensors.
  • Automotive Applications: Used in light sensing applications within vehicles, including automatic headlight control systems.
Dimension and Circuit Drawing:
Related Article List
Filters Sort results
Reset Apply
More information, Contact us at sales@betlux.com
Related Information


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

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.
Need help?
Scroll to Top