The PD12-21B/TR8 is a surface-mount, blue LED manufactured by Everlight Electronics Co Ltd. It is a compact and efficient light source suitable for a variety of applications requiring a visible blue light emission. The 'TR8' designation likely refers to the specific tape and reel packaging used for automated assembly processes. This LED is designed for ease of integration into printed circuit boards (PCBs) and offers reliable performance.

Applications

• Indicator Lights: Status indicators for electronic devices, appliances, and equipment.
• Backlighting: Backlighting for LCD screens, keypads, and other displays.
• Automotive Lighting: Interior lighting, dashboard indicators, and accent lighting in vehicles.
• Medical Devices: Illumination for medical instruments and diagnostic equipment.
• Consumer Electronics: Decorative lighting, accent lighting, and general illumination in various consumer products.

Features

• High Luminous Intensity: Provides a bright and easily visible blue light output.
• Surface Mount Technology (SMT): Allows for automated assembly and compact design.
• Long Lifespan: Offers extended operational life, reducing the need for frequent replacements.
• Low Power Consumption: Operates efficiently, minimizing power usage and heat generation.
• Compact Package: Small form factor enables integration into space-constrained applications.

Benefits

• Improved Visibility: Provides clear and easily distinguishable indicator lights.
• Simplified Assembly: Enables efficient and cost-effective manufacturing processes.
• Reduced Maintenance: Long lifespan minimizes the need for replacements, lowering maintenance costs.
• Energy Efficiency: Low power consumption reduces energy costs and extends battery life in portable devices.
• Versatile Integration: Compact size allows for flexible placement in various applications.

Additional Details

The PD12-21B/TR8 is typically specified with parameters such as luminous intensity, viewing angle, peak wavelength, and forward voltage. The datasheet provides detailed information on these characteristics, as well as recommended operating conditions. Proper current limiting is essential to prevent damage to the LED. A series resistor is typically used to limit the current to the specified forward current value. The viewing angle determines the spread of the emitted light. The peak wavelength specifies the dominant color of the blue light. Ensure that the operating temperature is within the specified range to maintain optimal performance and lifespan. The tape and reel packaging (TR8) is designed for automated pick-and-place assembly, ensuring accurate and efficient placement on PCBs.