LED Lamp 484-10SURT/S530-A3 Datasheet - Brilliant Red - 20mcd - 2.0V - 60mW - English Technical Document

1. Product Overview

This document provides the complete technical specifications and application guidelines for the 484-10SURT/S530-A3 series LED lamp. This component is a discrete light-emitting diode designed for applications requiring reliable illumination with specific color and intensity characteristics.

1.1 Core Features and Advantages

The LED offers several key features that make it suitable for a variety of electronic applications:

• Viewing Angle Options: Available with various viewing angles to suit different application needs.
• Packaging: Supplied on tape and reel for compatibility with automated assembly processes.
• Robustness: Designed to be reliable and robust under standard operating conditions.
• Environmental Compliance: The product complies with RoHS (Restriction of Hazardous Substances), EU REACH regulations, and is Halogen Free, with limits for Bromine (Br) and Chlorine (Cl) as specified.

1.2 Product Description

This LED series is specially engineered to deliver higher brightness levels. The lamps are available in different colors and luminous intensities, allowing designers to select the optimal component for their visual indicator or backlighting needs. The specific model covered here emits a Brilliant Red color.

1.3 Target Applications

Typical applications for this LED include, but are not limited to:

• Television sets
• Computer monitors
• Telephones
• General computer and electronic equipment

2. Technical Specifications and In-Depth Analysis

2.1 Device Selection and Material

The light-emitting chip is constructed from AlGaInP (Aluminum Gallium Indium Phosphide) semiconductor material. This material system is known for producing high-efficiency red, orange, and yellow LEDs. The resin encapsulant is red and transparent, optimized for the Brilliant Red emitted color.

2.2 Absolute Maximum Ratings

These ratings define the limits beyond which permanent damage to the device may occur. Operation under or at these conditions is not guaranteed.

• Continuous Forward Current (I_F): 25 mA
• Peak Forward Current (I_FP): 60 mA (at 1/10 duty cycle, 1 kHz)
• Reverse Voltage (V_R): 5 V
• Power Dissipation (P_d): 60 mW
• Operating Temperature (T_opr): -40°C to +85°C
• Storage Temperature (T_stg): -40°C to +100°C
• Soldering Temperature (T_sol): 260°C for 5 seconds (wave or reflow)

2.3 Electro-Optical Characteristics (Ta=25°C)

These are the typical performance parameters measured under standard test conditions (I_F = 20 mA).

• Luminous Intensity (I_v): Typical 20 mcd (Minimum 10 mcd). This quantifies the perceived brightness of the red light.
• Viewing Angle (2θ_1/2): Typical 130 degrees. This is the full angle at which the luminous intensity is half of the peak intensity.
• Peak Wavelength (λ_p): Typical 632 nm. The wavelength at which the spectral emission is strongest.
• Dominant Wavelength (λ_d): Typical 624 nm. The single wavelength perceived by the human eye, defining the color.
• Spectrum Radiation Bandwidth (Δλ): Typical 20 nm. The width of the emitted spectrum.
• Forward Voltage (V_F): Typical 2.0 V (Range: 1.7 V to 2.4 V). The voltage drop across the LED when operating.
• Reverse Current (I_R): Maximum 10 μA at V_R=5V.

Note: Measurement uncertainties are provided for key parameters: V_F (±0.1V), I_v (±10%), λ_d (±1.0nm).

3. Performance Curve Analysis

The datasheet includes several characteristic curves that illustrate device behavior under varying conditions. These are crucial for circuit design and thermal management.

3.1 Relative Intensity vs. Wavelength

This curve shows the spectral power distribution, peaking around 632 nm (red) with a typical bandwidth of 20 nm, confirming the Brilliant Red color.

3.2 Directivity Pattern

A polar plot illustrating the 130-degree typical viewing angle, showing how light intensity decreases at angles off the central axis.

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

This graph shows the exponential relationship between current and voltage. The typical forward voltage of 2.0V at 20mA is a key parameter for calculating series resistor values in driving circuits.

3.4 Relative Intensity vs. Forward Current

This curve demonstrates that light output (intensity) increases with forward current, but not necessarily linearly across the entire range. It helps in selecting an appropriate drive current for desired brightness.

3.5 Temperature Dependence

Two critical curves are provided:

• Relative Intensity vs. Ambient Temperature: Shows how light output typically decreases as the ambient temperature rises. This is a key consideration for applications in high-temperature environments.
• Forward Current vs. Ambient Temperature: May illustrate how the forward voltage characteristic shifts with temperature, affecting the drive circuit's behavior.

4. Mechanical and Packaging Information

4.1 Package Dimensions

A detailed mechanical drawing is provided specifying the physical size of the LED lamp. Key notes include:

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

The drawing includes lead spacing, body diameter, total height, and other critical mounting dimensions.

4.2 Polarity Identification

The cathode is typically indicated by a flat spot on the lens, a shorter lead, or other marking as shown in the dimension diagram. Correct polarity must be observed during installation.

5. Binning and Ordering Information

5.1 Label Explanation

Product labels contain several codes for traceability and specification:

• CPN: Customer's Production Number
• P/N: Production Number (e.g., 484-10SURT/S530-A3)
• QTY: Packing Quantity
• CAT: Ranks of Luminous Intensity (Brightness bin)
• HUE: Ranks of Dominant Wavelength (Color bin)
• REF: Ranks of Forward Voltage (Voltage bin)
• LOT No: Manufacturing Lot Number

5.2 Packing Specification

The LEDs are packed to prevent damage from electrostatic discharge (ESD) and moisture:

• Primary Packing: Anti-electrostatic bags.
• Secondary Packing: Inner cartons.
• Tertiary Packing: Outside cartons for shipping.
• Packing Quantity: Typically 200 to 1000 pieces per bag, 5 bags per inner carton, and 10 inner cartons per outside carton.

6. Assembly, Handling, and Application Guidelines

6.1 Lead Forming

If leads need to be bent for through-hole mounting:

• Bend at a point at least 3mm from the base of the epoxy bulb.
• Perform bending before soldering.
• Avoid stressing the LED package; stress can damage internal connections or crack the epoxy.
• Cut leads at room temperature.
• Ensure PCB holes align perfectly with LED leads to avoid mounting stress.

6.2 Storage Conditions

To preserve solderability and performance:

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

6.3 Soldering Instructions

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

Hand Soldering:

• Iron tip temperature: 300°C Max. (30W Max. iron)
• Soldering time per lead: 3 seconds Max.

Wave/Dip Soldering:

• Preheat temperature: 100°C Max. (60 seconds Max.)
• Solder bath temperature & time: 260°C Max., 5 seconds Max.

A recommended soldering temperature profile graph is provided, showing preheat, soak, reflow, and cooling phases. Key additional notes:

• Avoid mechanical stress on leads while the LED is hot.
• Do not solder (dip or hand) more than once.
• Protect the LED from shock/vibration until it cools to room temperature after soldering.
• Do not use rapid cooling processes.
• Use the lowest possible soldering temperature that achieves a reliable joint.

6.4 Cleaning

• If cleaning is necessary, use isopropyl alcohol at room temperature for no more than one minute.
• Dry at room temperature before use.
• Avoid ultrasonic cleaning. If absolutely required, pre-qualify the process parameters (power, time) to ensure no damage occurs.

6.5 Heat Management

The datasheet emphasizes that thermal management must be considered during the application design phase. The operating current should be derated appropriately if the LED is used in high ambient temperatures or on a PCB with poor heat dissipation to ensure longevity and maintain light output. Exceeding the maximum junction temperature will accelerate light output degradation and can lead to premature failure.

7. Application Suggestions and Design Considerations

7.1 Driving Circuit Design

To operate this LED, a current-limiting device (usually a resistor) is mandatory. The resistor value (R_s) can be calculated using Ohm's Law: R_s = (V_supply - V_F) / I_F. Use the maximum V_F from the datasheet (2.4V) for a conservative design to ensure the current does not exceed 20mA even with component tolerances. For example, with a 5V supply: R_s = (5V - 2.4V) / 0.020A = 130 Ohms. A standard 130Ω or 150Ω resistor would be suitable.

7.2 PCB Layout and Mounting

Ensure the PCB footprint matches the package dimensions. Provide adequate clearance around the LED body. For through-hole mounting, hole sizes should accommodate the lead diameter without excessive force. For best optical performance, consider the viewing angle when positioning the LED on the board relative to the intended viewer or light guide.

7.3 Long-Term Reliability

Operating the LED significantly below its maximum ratings (current, temperature) will enhance its long-term reliability and maintain stable luminous intensity over time. Consider using a constant-current driver for applications requiring precise and stable brightness.

8. Frequently Asked Questions (Based on Technical Parameters)

8.1 What is the difference between Peak Wavelength and Dominant Wavelength?

Peak Wavelength (632 nm) is the physical wavelength where the spectral emission is strongest. Dominant Wavelength (624 nm) is the psychophysical single wavelength that the human eye perceives as matching the color of the LED. They often differ, especially for saturated colors.

8.2 Can I drive this LED with a 3.3V supply?

Yes. Using the calculation above: R_s = (3.3V - 2.4V) / 0.020A = 45 Ohms. A 47Ω resistor would be appropriate. Ensure the power rating of the resistor is sufficient (P = I²R = 0.02² * 47 = 0.0188W, so a 1/8W or 1/10W resistor is fine).

8.3 Why is the viewing angle so wide (130°)?

A wide viewing angle is beneficial for applications where the indicator needs to be visible from a broad range of positions, such as status lights on consumer electronics placed on a desk. The lens design diffuses the light to create this wide pattern.

8.4 How does temperature affect brightness?

As shown in the performance curves, the relative luminous intensity typically decreases as the ambient temperature increases. For high-temperature applications, you may need to select an LED from a higher brightness bin initially or implement thermal management to keep the junction temperature lower.

9. Technical Principles and Trends

9.1 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) where they recombine. This recombination releases energy in the form of photons (light). The specific composition of the AlGaInP alloy determines the bandgap energy, which in turn dictates the wavelength (color) of the emitted light—in this case, Brilliant Red.

9.2 Industry Context and Trends

Discrete LED lamps like this one represent a mature and highly reliable technology for indicator and simple lighting functions. While high-power LEDs for illumination and advanced packages like chip-scale LEDs (CSP) are areas of rapid development, through-hole and low-power SMD LEDs continue to be essential for cost-effective, reliable signaling in countless electronic products. Trends in this segment focus on increasing efficiency (more light output per mA), improving color consistency through tighter binning, and enhancing reliability under harsh conditions. The drive for miniaturization also continues, though packages like the 484 series offer a good balance of size, ease of handling, and optical performance.