LED Lamp 339-1SURSYGC/S530-A3 Datasheet - Bicolor/Bipolar - 25mA - Brilliant Red/Yellow Green - English Technical Document

1. Product Overview

The 339-1SURSYGC/S530-A3 is a dual-chip LED lamp designed for applications requiring clear, reliable indicator lighting. It is available in both bicolor and bipolar configurations, offering design flexibility. The primary emitted colors are Brilliant Red and Brilliant Yellow Green, achieved through AlGaInP semiconductor technology. The device is characterized by its solid-state reliability, long operational life, and low power consumption, making it suitable for integration into various electronic systems.

1.1 Core Advantages and Target Market

The key advantages of this LED lamp include matched chips for uniform light output and a wide viewing angle, ensuring consistent visual performance. It is designed to be I.C. compatible, simplifying circuit design. The product complies with relevant environmental regulations, including RoHS, EU REACH, and is Halogen Free (Br <900 ppm, Cl <900 ppm, Br+Cl < 1500 ppm). Its primary target markets and applications are consumer electronics and computing peripherals, specifically:

• Television Sets
• Computer Monitors
• Telephones
• Computers

2. In-Depth Technical Parameter Analysis

This section provides a detailed breakdown of the device's electrical, optical, and thermal specifications.

2.1 Absolute Maximum Ratings

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

2.2 Electro-Optical Characteristics (T_a=25°C)

These are the typical operating parameters under standard test conditions.

Measurement Notes: Forward Voltage uncertainty is ±0.1V. Luminous Intensity uncertainty is ±10%. Dominant Wavelength uncertainty is ±1.0nm.

3. Performance Curve Analysis

The datasheet provides characteristic curves for both the SUR (Brilliant Red) and SYG (Brilliant Yellow Green) variants. These curves are essential for understanding device behavior under varying conditions.

3.1 SUR (Brilliant Red) Characteristics

The curves for the SUR LED show the relationship between relative intensity and wavelength, directivity pattern, forward current versus forward voltage (I-V curve), relative intensity versus forward current, relative intensity versus ambient temperature, and forward current versus ambient temperature. The I-V curve is typical of a diode, showing an exponential increase in current after the forward voltage threshold (~1.7-2.0V) is reached. The intensity vs. temperature curve shows a decrease in output as ambient temperature rises, which is a common characteristic of LEDs due to increased non-radiative recombination and efficiency droop.

3.2 SYG (Brilliant Yellow Green) Characteristics

The SYG LED shares similar curve types: relative intensity vs. wavelength, directivity, I-V curve, and intensity vs. forward current. Additionally, it includes a curve for chromaticity coordinate vs. forward current, which is crucial for applications where color consistency under different drive conditions is important. The forward current vs. ambient temperature curve helps in thermal management design.

4. Mechanical and Package Information

4.1 Package Dimensions

The LED is housed in a standard lamp-style package. Key dimensional notes from the datasheet include:

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

A detailed dimensioned drawing is provided in the original datasheet, specifying lead spacing, body diameter, and overall height. Designers must refer to this drawing for accurate PCB footprint creation.

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 damage or breakage.
• Cut leadframes at room temperature.
• Ensure PCB holes align exactly with LED leads to avoid mounting stress.

5.2 Storage

• Recommended storage: ≤30°C and ≤70% Relative Humidity.
• Storage life after shipping: 3 months under recommended conditions.
• For longer storage (up to 1 year): use a sealed container with a nitrogen atmosphere and moisture absorbent.
• Avoid rapid temperature transitions in high humidity to prevent condensation.

5.3 Soldering Process

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

Additional Soldering Notes:

• Avoid stress on the lead frame at high temperatures.
• Do not perform dip or hand soldering more than once.
• Protect the epoxy bulb from mechanical shock/vibration until the LED cools to room temperature.
• Avoid rapid cooling from peak soldering temperature.
• Always use the lowest effective temperature and shortest time.

6. Packaging and Ordering Information

6.1 Packing Specification

The LEDs are packaged to prevent electrostatic discharge (ESD) and moisture damage.

• Primary Packing: Anti-electrostatic bag.
• Secondary Packing: Inner carton.
• Tertiary Packing: Outside carton.
• Packing Quantity: Minimum 200 to 500 pieces per bag. 5 bags per inner carton. 10 inner cartons per outside carton.

6.2 Label Explanation

Labels on the packaging contain the following information:

• CPN: Customer's Production Number
• P/N: Production Number (e.g., 339-1SURSYGC/S530-A3)
• QTY: Packing Quantity
• CAT: Ranks of Luminous Intensity
• HUE: Ranks of Dominant Wavelength
• REF: Ranks of Forward Voltage
• LOT No: Lot Number for traceability

7. Application Suggestions and Design Considerations

7.1 Typical Application Circuits

For standard indicator use, a simple series current-limiting resistor is required. The resistor value (R_s) can be calculated using Ohm's Law: R_s = (V_supply - V_F) / I_F. Where V_F is the typical forward voltage (2.0V) and I_F is the desired forward current (e.g., 20mA). Ensure the resistor's power rating is sufficient: P_R = (I_F)² * R_s.

7.2 Design Considerations

• Current Driving: Always drive LEDs with a constant current or using a current-limiting resistor. Applying a constant voltage equal to V_F is not recommended due to unit-to-unit variation and temperature dependence of V_F.
• Thermal Management: Although power dissipation is low, ensure adequate ventilation in the enclosure, especially if multiple LEDs are used or if ambient temperatures approach the maximum rating.
• Bicolor/Bipolar Operation: Understand the pinout and internal configuration (common anode/cathode for bipolar, separate dies for bicolor) for correct circuit design.
• ESD Protection: Follow standard ESD handling procedures during assembly, as LEDs are sensitive to electrostatic discharge.

8. Technical Comparison and Differentiation

The 339-1 series differentiates itself through its dual-chip design in a standard lamp package. Compared to single-die LEDs, it offers the possibility of two colors or a bipolar (reverse polarity protection) configuration in the same footprint. The use of AlGaInP technology provides high efficiency for red and yellow-green wavelengths, resulting in good luminous intensity (250 mcd for red, 63 mcd for yellow-green) at a modest 20mA drive current. The wide 25-degree viewing angle ensures visibility from various perspectives, which is advantageous for panel indicators.

9. Frequently Asked Questions (Based on Technical Parameters)

9.1 What is the difference between the SUR and SYG versions?

SUR denotes the Brilliant Red LED (λ_d ~624nm), while SYG denotes the Brilliant Yellow Green LED (λ_d ~573nm). They differ in the dominant wavelength and typical luminous intensity.

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

Yes, but the electro-optical characteristics in the datasheet are specified at 20mA. Operating at 25mA will produce higher light output but will also increase power dissipation and junction temperature, potentially affecting long-term reliability and causing a slight shift in wavelength. It is generally good practice to derate and operate slightly below the absolute maximum rating for improved lifespan.

9.3 What does "bicolor" and "bipolar" mean for this lamp?

Bicolor: The package contains two separate LED chips (e.g., one red, one green) that can be controlled independently. They typically have three leads (common cathode or anode).
Bipolar: The package contains a single LED die but is constructed such that it will light when voltage is applied in either polarity (though likely only one polarity is correct for the intended color). It acts as a simple indicator that lights regardless of DC polarity, often used in AC or polarity-agnostic circuits. The datasheet mentions these are available in White Clear and Color Clear resin.

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

Very critical. The epoxy resin that forms the LED bulb is sensitive to heat and mechanical stress. Soldering or bending closer than 3mm can transfer excessive heat to the semiconductor die, damaging it, or can crack the epoxy, leading to premature failure or moisture ingress.

10. Practical Design and Usage Case

Scenario: Designing a dual-status indicator for a power supply unit.
A designer needs a single component to show "Standby" (yellow) and "On" (red) states. They select the bicolor version of the 339-1 lamp. They design a circuit where a microcontroller pin drives the cathode of the yellow (SYG) die through a current-limiting resistor for standby. Another pin drives the cathode of the red (SUR) die through a separate resistor for the "On" state. The anodes of both dies are tied together to the positive supply rail. The 25° viewing angle ensures the indicator is visible from the front panel. The designer follows the soldering guidelines, ensuring a 3mm gap, and specifies the correct PCB footprint from the package dimensions. They also ensure the storage and handling instructions are passed to the manufacturing team.

11. Technology Principle Introduction

The 339-1 LED lamp utilizes Aluminum Gallium Indium Phosphide (AlGaInP) semiconductor material for its light-emitting region. AlGaInP is a compound semiconductor whose bandgap energy--and thus the color of emitted light--can be tuned by varying the ratios of aluminum, gallium, and indium. A Brilliant Red emission (~624nm) requires a different composition than a Brilliant Yellow Green emission (~573nm). When a forward voltage exceeding the diode's turn-on voltage is applied, electrons and holes are injected into the active region where they recombine, releasing energy in the form of photons (light). The specific wavelength of these photons is determined by the bandgap of the AlGaInP material. The epoxy lens serves to protect the semiconductor die, shape the light output beam (25° viewing angle), and enhance light extraction.

12. Industry Trends and Context

While this product represents a mature through-hole LED technology, it remains relevant in applications requiring high reliability, ease of manual assembly, or specific mechanical form factors. The industry trend for indicator lights in consumer electronics has largely shifted towards surface-mount device (SMD) LEDs (e.g., 0603, 0402 packages) for automated assembly and space savings. However, through-hole LEDs like the 339-1 are still widely used in industrial controls, appliances, and areas where superior mechanical bond strength or higher single-point light output from a larger package is desired. The emphasis on environmental compliance (RoHS, REACH, Halogen-Free) seen in this datasheet is a direct reflection of global regulatory trends driving electronics manufacturing towards greener materials and processes.