LED Lamp 103UYD/S530-A3 Specification - Brilliant Yellow - 20mA - 2.0V - English Technical Document

1. Product Overview

The 103UYD/S530-A3 is a high-brightness LED lamp designed for applications requiring superior luminous output. It utilizes an AlGaInP chip to produce a brilliant yellow color with a diffused yellow resin package. This component is engineered for reliability and robustness in various electronic assemblies.

1.1 Core Features and Advantages

• High Brightness: Specifically designed for applications demanding higher luminous intensity.
• Choice of Viewing Angles: Available with various viewing angles to suit different application needs.
• Packaging Options: Available on tape and reel for automated assembly processes.
• Environmental Compliance: The product is compliant with RoHS, EU REACH, and is Halogen-Free (Br <900 ppm, Cl <900 ppm, Br+Cl < 1500 ppm). It is also lead-free (Pb-free).
• Color and Intensity Options: The LED lamp series is available in different colors and intensities.

1.2 Target Market and Applications

This LED is targeted at consumer electronics and display backlighting markets. Its primary applications include:

• Television Sets
• Computer Monitors
• Telephones
• Computers and related peripherals

2. Technical Parameters and Specifications

2.1 Absolute Maximum Ratings

These ratings define the limits beyond which permanent damage to the device may occur. All ratings are specified at an ambient temperature (Ta) of 25°C.

2.2 Electro-Optical Characteristics

These are the typical performance parameters measured at Ta=25°C and a forward current (IF) of 20mA, unless otherwise stated.

Measurement Notes:

• Forward Voltage Uncertainty: ±0.1V
• Luminous Intensity Uncertainty: ±10%
• Dominant Wavelength Uncertainty: ±1.0nm

3. Performance Curve Analysis

The datasheet provides several characteristic curves that illustrate the device's behavior under varying conditions. These are essential for design engineers to predict performance in real-world applications.

3.1 Relative Intensity vs. Wavelength

This curve shows the spectral power distribution of the emitted light. The peak is centered around the typical 591nm, confirming the brilliant yellow color. The relatively narrow spectrum radiation bandwidth (Δλ typ. 15nm) indicates good color purity.

3.2 Directivity Pattern

The radiation pattern curve defines the viewing angle. The typical 130-degree full viewing angle (2θ1/2) indicates a wide, diffused emission pattern suitable for area illumination and indicator applications where visibility from multiple angles is required.

3.3 Forward Current vs. Forward Voltage (I-V Curve)

This graph depicts the non-linear relationship between current and voltage. The typical forward voltage (Vf) is 2.0V at 20mA. Designers must use current-limiting resistors or constant-current drivers based on this curve to ensure stable operation and prevent thermal runaway.

3.4 Relative Intensity vs. Forward Current

This curve shows how light output (relative intensity) increases with forward current. It is crucial for understanding the efficiency and for driving the LED at an optimal current to achieve desired brightness without exceeding maximum ratings.

3.5 Thermal Characteristics

Two key curves relate performance to ambient temperature:

• Relative Intensity vs. Ambient Temperature: Shows the decrease in light output as temperature rises. This thermal derating is critical for applications in high-temperature environments.
• Forward Current vs. Ambient Temperature: Illustrates how the permissible forward current should be reduced at higher ambient temperatures to stay within the power dissipation limits and ensure long-term reliability.

4. Mechanical and Package Information

4.1 Package Dimensions

The LED features a standard 3mm round through-hole package. Key dimensional notes include:

• All dimensions are in millimeters (mm).
• The height of the flange must be less than 1.5mm (0.059\").
• The default tolerance is ±0.25mm unless otherwise specified.

The dimensional drawing provides exact measurements for lead spacing, body diameter, and overall height, which are essential for PCB footprint design and ensuring proper fit in the application.

4.2 Polarity Identification

The cathode is typically identified by a flat spot on the lens or a shorter lead. Correct polarity must be observed during installation to prevent reverse bias damage, as the maximum reverse voltage is only 5V.

5. Soldering and Assembly Guidelines

Proper handling is critical to maintain LED performance and reliability.

5.1 Lead Forming

• Bend leads at a point at least 3mm from the base of the epoxy bulb.
• Perform lead forming before soldering.
• Avoid stressing the LED package during forming to prevent internal damage or breakage.
• Cut leads at room temperature.
• Ensure PCB holes align perfectly with LED leads to avoid mounting stress.

5.2 Storage Conditions

• Store at ≤30°C and ≤70% Relative Humidity after receipt.
• Standard storage life is 3 months. For longer storage (up to 1 year), use a sealed container with a nitrogen atmosphere and desiccant.
• Avoid rapid temperature changes, especially in humid environments, to prevent condensation.

5.3 Soldering Recommendations

Maintain a minimum distance of 3mm from the solder joint to the epoxy bulb.

Critical Soldering Notes:

• Avoid stress on leads during high-temperature soldering.
• Do not perform dip/hand soldering more than once.
• Protect the LED from mechanical shock/vibration until it cools to room temperature after soldering.
• Always use the lowest possible soldering temperature.

5.4 Cleaning

• If necessary, clean only with isopropyl alcohol at room temperature for ≤1 minute. Air dry.
• Do not use ultrasonic cleaning unless absolutely necessary and pre-qualified, as it can damage the LED.

5.5 Heat Management

Proper thermal design is essential. The operating current must be de-rated appropriately at higher ambient temperatures, as shown in the derating curves. Inadequate heat sinking can lead to reduced light output, color shift, and accelerated degradation.

6. Packaging and Ordering Information

6.1 Packing Specification

The LEDs are packaged to ensure moisture resistance and protection from electrostatic discharge (ESD).

• Primary Packing: Anti-electrostatic bag.
• Inner Packing: Inner carton.
• Outer Packing: Outside carton.

6.2 Packing Quantity

1. Minimum 200 to 500 pieces per anti-static bag.
2. 5 bags per inner carton.
3. 10 inner cartons per outside carton.

6.3 Label Explanation

Labels on packaging contain the following information:

• CPN: Customer's Production Number
• P/N: Production Number (e.g., 103UYD/S530-A3)
• QTY: Packing Quantity
• CAT: Ranks (performance bin)
• HUE: Dominant Wavelength (e.g., 589nm)
• REF: Reference
• LOT No: Lot Number for traceability

7. Application Suggestions and Design Considerations

7.1 Typical Application Circuits

For basic indicator use, a simple series current-limiting resistor is sufficient. The resistor value (R) can be calculated using Ohm's Law: R = (Vsupply - Vf) / If. Where Vf is the forward voltage (use 2.0V typical for design margin) and If is the desired forward current (e.g., 20mA). Ensure the resistor power rating is adequate: P = (Vsupply - Vf) * If.

7.2 Design Considerations

• Current Driving: Always drive with a constant current or a current-limited voltage source. Do not connect directly to a voltage source.
• Thermal Management: In high-power or high-ambient-temperature applications, consider PCB copper area for heat spreading or external heat sinking.
• ESD Protection: Although not explicitly rated as highly sensitive, standard ESD handling precautions are recommended during assembly.
• Optical Design: The wide 130-degree viewing angle makes it suitable for omnidirectional indicators. For focused light, external lenses or reflectors may be needed.

8. Technical Comparison and Differentiation

The 103UYD/S530-A3 differentiates itself through its specific combination of attributes:

• Material Technology: The use of AlGaInP semiconductor material is optimal for high-efficiency yellow and amber LEDs, often offering better performance in these wavelengths compared to other technologies like phosphor-converted blue LEDs for certain color points.
• Brightness: Positioned as a \"higher brightness\" solution within its category, making it suitable for applications where visibility is paramount.
• Compliance: Full compliance with modern environmental regulations (RoHS, REACH, Halogen-Free) is a key advantage for products targeting global markets, especially Europe.

9. Frequently Asked Questions (FAQ)

9.1 What is the difference between peak wavelength and dominant wavelength?

Peak Wavelength (λp, 591nm typ.) is the wavelength at which the emission spectrum has its maximum intensity. Dominant Wavelength (λd, 589nm typ.) is the single wavelength of monochromatic light that matches the perceived color of the LED. Designers concerned with color perception should reference the dominant wavelength.

9.2 Can I drive this LED at its maximum continuous current of 25mA?

While possible, it is not recommended for optimal lifetime and reliability unless necessary for brightness. Driving at the typical 20mA provides a good balance of performance and longevity. Always consider thermal derating at elevated ambient temperatures.

9.3 Why is the reverse voltage rating only 5V?

LEDs are not designed to be operated in reverse bias. The low reverse voltage rating is typical for standard indicator LEDs. Always ensure correct polarity in the circuit. Incorporating a protection diode in parallel (cathode to anode) can be considered in applications where reverse voltage is a risk.

9.4 How critical is the 3mm distance rule for soldering and lead bending?

Very critical. The epoxy resin bulb is sensitive to heat and mechanical stress. Violating this distance can transfer excessive heat during soldering, potentially cracking the epoxy or damaging the internal die/bond wires, leading to immediate failure or reduced long-term reliability.

10. Operational Principles and Technology Trends

10.1 Basic Operating Principle

This LED operates on the principle of electroluminescence in a semiconductor p-n junction. When a forward voltage is applied, electrons and holes are injected into the active region (the AlGaInP layer). When these charge carriers recombine, they release energy in the form of photons (light). The specific composition of the AlGaInP alloy determines the bandgap energy, which directly defines the wavelength (color) of the emitted light—in this case, brilliant yellow.

10.2 Industry Trends

While through-hole LEDs like the 103UYD/S530-A3 remain vital for many applications, the industry trend is strongly towards surface-mount device (SMD) packages for automated assembly, higher density, and better thermal performance. However, through-hole components continue to be preferred for applications requiring high mechanical strength, ease of manual prototyping, or specific optical form factors. The underlying AlGaInP technology for pure color LEDs like yellow remains a mature and efficient solution, though advancements continue in efficiency (lumens per watt) and maximum operating temperature.