LED Lamp 6324-15SUGC/S400-A6 Datasheet - Brilliant Green - 20mA - 1250mcd - English Technical Document

1. Product Overview

This document provides the complete technical specifications for a high-brightness, brilliant green LED lamp. The device is part of a series engineered for applications demanding superior luminous output. It utilizes InGaN chip technology encapsulated in a water-clear resin, resulting in a vibrant and intense green emission. The product is designed with reliability and robustness as core principles, ensuring consistent performance in various electronic applications.

1.1 Core Features and Compliance

The LED lamp offers several key features that enhance its versatility and suitability for modern electronics manufacturing. It is available in various viewing angles to accommodate different optical design requirements. For high-volume assembly, the component is supplied on tape and reel. The product adheres to several important environmental and safety standards: it is compliant with the EU's RoHS (Restriction of Hazardous Substances) directive, meets the requirements of the EU REACH regulation, and is classified as Halogen-Free, with strict limits on Bromine (Br) and Chlorine (Cl) content (Br <900 ppm, Cl <900 ppm, Br+Cl < 1500 ppm).

1.2 Target Applications

This LED is specifically targeted at backlighting and indicator functions within consumer and computer electronics. Its primary applications include television sets, computer monitors, telephones, and general computer peripherals, where its brightness and color quality can be effectively utilized.

2. Technical Specifications Deep Dive

This section details the critical electrical, optical, and thermal parameters that define the operational boundaries and performance of the LED.

2.1 Absolute Maximum Ratings

Operating the device beyond these limits may cause permanent damage. The continuous forward current (I_F) is rated at 25 mA. For pulsed operation, a peak forward current (I_FP) of 100 mA is permissible at a duty cycle of 1/10 and 1 kHz frequency. The maximum reverse voltage (V_R) is 5 V. The power dissipation (P_d) is limited to 90 mW. The device can operate in ambient temperatures (T_opr) from -40°C to +85°C and be stored (T_stg) between -40°C and +100°C. The soldering temperature (T_sol) tolerance is 260°C for a maximum of 5 seconds.

2.2 Electro-Optical Characteristics

These parameters are measured at a standard test condition of 25°C ambient temperature and a forward current of 20 mA, which is the typical operating point. The luminous intensity (I_v) has a typical value of 1250 millicandelas (mcd), with a minimum of 630 mcd. The viewing angle (2θ_1/2), defined as the angle where intensity drops to half its peak value, is typically 60 degrees. The peak wavelength (λ_p) is typically 518 nm, while the dominant wavelength (λ_d) is typically 525 nm, defining the perceived brilliant green color. The spectral bandwidth (Δλ) is typically 35 nm. The forward voltage (V_F) ranges from a minimum of 2.7 V, through a typical of 3.3 V, to a maximum of 3.7 V. The reverse current (I_R) is a maximum of 50 µA at the full 5 V reverse bias.

3. Performance Curve Analysis

The datasheet provides several characteristic graphs that illustrate the device's behavior under varying conditions, crucial for circuit and thermal design.

3.1 Spectral and Angular Distribution

The Relative Intensity vs. Wavelength curve shows the emission spectrum, centered around 518 nm with a defined bandwidth. The Directivity curve visually represents the 60-degree viewing angle, showing how light intensity distributes spatially.

3.2 Electrical and Thermal Dependence

The Forward Current vs. Forward Voltage curve demonstrates the diode's exponential I-V relationship, essential for driver design. The Relative Intensity vs. Forward Current graph shows how light output increases with current, important for brightness tuning. The Relative Intensity vs. Ambient Temperature and Forward Current vs. Ambient Temperature graphs are critical for thermal management, illustrating the decrease in efficiency and the potential need for current derating as temperature rises.

4. Mechanical and Package Information

4.1 Package Dimensions

The LED features a standard lamp-style package. Key dimensional notes include: all dimensions are in millimeters; the height of the flange must be less than 1.5mm (0.059 inches); and the general tolerance is ±0.25mm unless otherwise specified. The detailed drawing provides exact measurements for lead spacing, body size, and lens geometry, which are vital for PCB footprint design and ensuring proper fit within the assembly.

5. Assembly, Handling, and Storage Guidelines

Proper handling is essential to maintain device reliability and performance.

5.1 Lead Forming

If leads need to be bent, it must be done before soldering. The bend should be at least 3mm from the base of the epoxy bulb to avoid stress on the package. Cutting should be done at room temperature. The PCB holes must align perfectly with the LED leads to prevent mounting stress.

5.2 Storage Conditions

LEDs should be stored at or below 30°C and 70% Relative Humidity. The recommended storage life from shipment is 3 months. For longer storage up to one year, use a sealed container with a nitrogen atmosphere and desiccant. Avoid rapid temperature changes in humid environments to prevent condensation.

5.3 Soldering Recommendations

Maintain a minimum distance of 3mm from the solder joint to the epoxy bulb. For hand soldering: use an iron tip at a maximum of 300°C (30W max) for no more than 3 seconds. For dip soldering: preheat to a maximum of 100°C for up to 60 seconds, with a solder bath at a maximum of 260°C for 5 seconds. Avoid applying stress to the leads while hot. Do not solder (dip or hand) more than once. Allow the LED to cool gradually to room temperature after soldering, protecting it from shock or vibration during this period.

5.4 Cleaning

If cleaning is necessary, use isopropyl alcohol at room temperature for no more than one minute, then air dry. Ultrasonic cleaning is not recommended. If absolutely required, its parameters (power, duration) must be pre-qualified to ensure no damage occurs.

5.5 Heat Management

Thermal management is a critical design consideration. The operating current should be appropriately derated based on the ambient temperature, referring to the derating curve typically found in the product specification. Proper heat sinking or PCB thermal design is necessary to maintain junction temperature within safe limits for long-term reliability.

6. Packaging and Ordering Information

6.1 Packing Specification

The LEDs are packed in anti-static bags for ESD protection. The packing hierarchy is: a minimum of 200 to 500 pieces per bag, 5 bags per inner carton, and 10 inner cartons per master (outside) carton.

6.2 Label Explanation

Labels on the packaging contain several codes: CPN (Customer's Part Number), P/N (Manufacturer's Part Number), QTY (Packing Quantity), CAT (Luminous Intensity Rank), HUE (Dominant Wavelength Rank), REF (Forward Voltage Rank), and LOT No. (Lot Traceability Number). This binning information allows for selection of LEDs with tightly specified parameters.

7. Application Notes and Design Considerations

7.1 Driver Circuit Design

Design the driver circuit based on the typical forward voltage of 3.3V at 20mA. A current-limiting resistor or constant-current driver is mandatory to prevent exceeding the absolute maximum current rating, especially considering the forward voltage variation (2.7V to 3.7V). For pulsed operation for higher perceived brightness, ensure the pulse parameters (duty cycle, frequency) stay within the I_FP rating.

7.2 Optical Integration

The 60-degree viewing angle makes this LED suitable for both direct viewing and light guide applications. The water-clear resin provides a transparent window. For diffused light, external diffusers or light guides must be used. Consider the spatial radiation pattern shown in the directivity curve when designing lenses or light pipes.

7.3 Thermal Design in End Application

In enclosed spaces like monitor bezels or TV cabinets, ambient temperature can rise significantly. Use the derating curves to determine the maximum safe operating current for the expected worst-case ambient temperature. Ensure adequate ventilation or heat dissipation paths in the final product to preserve LED lifespan and maintain brightness.

8. Technical Comparison and Differentiation

While specific competitor data is not provided here, key differentiators of this LED can be inferred from its datasheet. The combination of high typical luminous intensity (1250 mcd) at a standard 20mA drive current, a relatively wide 60-degree viewing angle, and compliance with halogen-free and stringent RoHS standards positions it as a modern, environmentally conscious component. The detailed characteristic curves and comprehensive handling instructions provide designers with the necessary data for robust implementation, which may not be available for all comparable products.

9. Frequently Asked Questions (FAQ)

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

Peak wavelength (518 nm) is the point of maximum radiant power in the emission spectrum. Dominant wavelength (525 nm) is the single wavelength perceived by the human eye that matches the color of the LED. For green LEDs, the dominant wavelength is often longer than the peak wavelength due to the shape of the human eye's photopic response curve.

9.2 Can I drive this LED at 25mA continuously?

While the absolute maximum rating for continuous forward current is 25 mA, the standard test condition and typical performance data are specified at 20 mA. Operating at 25 mA may increase brightness but will also generate more heat, potentially reducing lifespan and shifting color. It is generally recommended to design for the typical 20mA drive unless the application requires the marginal extra output and thermal management is excellent.

9.3 How do the CAT, HUE, and REF ranks work?

These are binning codes. LEDs are sorted after manufacture based on measured performance. CAT ranks luminous intensity (e.g., brighter batches get a different code). HUE ranks dominant wavelength (tightening the color spread). REF ranks forward voltage. Specifying these ranks allows designers to select LEDs with very consistent behavior for applications where uniformity is critical, though it may affect cost and availability.

10. Operational Principle

This LED is based on an Indium Gallium Nitride (InGaN) semiconductor chip. When a forward voltage exceeding the diode's threshold is applied, electrons and holes are injected into the active region where they recombine. In this material system, the energy released during recombination corresponds to photons in the green portion of the visible spectrum (around 518-525 nm). The specific color is determined by the precise composition of the InGaN alloy. The water-clear epoxy resin encapsulant protects the chip, acts as a lens to shape the light output, and may contain phosphors or diffusers (though for this brilliant green version, it is clear).