LED Lamp 383-2SDRC/S530-A3 Datasheet - Super Deep Red - 650nm - 20mA - 60mW - English Technical Document

1. Product Overview

The 383-2SDRC/S530-A3 is a high-brightness LED lamp designed for applications requiring superior luminous output. It utilizes AlGaInP chip technology to produce a super deep red color with a typical peak wavelength of 650nm. This component is engineered for reliability and robustness, making it suitable for various electronic display and indicator applications.

1.1 Core Advantages

• High Brightness: Specifically designed for applications demanding higher luminous intensity.
• Compliance: The product is compliant with RoHS, EU REACH, and Halogen-Free standards (Br <900 ppm, Cl <900 ppm, Br+Cl < 1500 ppm).
• Packaging Options: Available on tape and reel for automated assembly processes.
• Viewing Angle Choice: Offered with various viewing angles to suit different application needs.

1.2 Target Market & Applications

This LED is primarily targeted at the consumer electronics and display industries. Its typical applications include backlighting or status indication in:

• Television Sets
• Computer Monitors
• Telephones
• Personal Computers

2. Technical Parameter Deep-Dive Analysis

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.

• Continuous Forward Current (I_F): 25 mA
• Reverse Voltage (V_R): 5 V
• Electrostatic Discharge (ESD): 2000 V (Human Body Model)
• 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 (peak)

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

The following parameters are measured under standard test conditions (I_F=20mA) and represent the device's typical performance.

• Luminous Intensity (I_v): 1000 (Min), 2000 (Typ) mcd. This high intensity is a key feature for visibility.
• Viewing Angle (2θ_1/2): 6° (Typ). This narrow viewing angle concentrates light output, enhancing perceived brightness in the forward direction.
• Peak Wavelength (λ_p): 650 nm (Typ). Defines the spectral peak of the emitted light.
• Dominant Wavelength (λ_d): 639 nm (Typ). The wavelength perceived by the human eye.
• Spectrum Radiation Bandwidth (Δλ): 20 nm (Typ). Indicates the spectral purity of the red light.
• Forward Voltage (V_F): 2.0 (Typ), 2.4 (Max) V at 20mA. A relatively low forward voltage is characteristic of AlGaInP technology.
• Reverse Current (I_R): 10 μA (Max) at V_R=5V.

Note on Measurement Uncertainty: Luminous Intensity ±10%, Dominant Wavelength ±1.0nm, Forward Voltage ±0.1V.

3. Performance Curve Analysis

The datasheet provides several characteristic curves that are crucial for design engineers.

3.1 Relative Intensity vs. Wavelength

This curve shows the spectral power distribution, confirming the narrow bandwidth and peak around 650nm, which is ideal for applications requiring a saturated deep red color.

3.2 Directivity Pattern

The radiation pattern illustrates the 6° typical viewing angle, showing how light intensity drops sharply outside the central beam, which is useful for directed lighting.

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

This graph is essential for designing the current-limiting circuitry. It shows the non-linear relationship between voltage and current, with the typical operating point at 20mA/2.0V.

3.4 Relative Intensity vs. Forward Current

This curve demonstrates that light output is approximately linear with current up to the maximum rated current, allowing for simple brightness modulation via current control.

3.5 Temperature Dependence

Two critical curves are provided:

• Relative Intensity vs. Ambient Temperature: Shows the decrease in luminous output as temperature increases. Proper heat management is required to maintain brightness.
• Forward Current vs. Ambient Temperature: Can be used to understand how the I-V characteristic shifts with temperature, important for constant-current driver design.

4. Mechanical and Package Information

4.1 Package Dimensions

The datasheet includes a detailed mechanical drawing of the LED package. Key dimensions include the lead spacing, body size, and overall height. Critical notes specify that the flange height must be less than 1.5mm and general tolerances are ±0.25mm unless otherwise stated.

4.2 Polarity Identification

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

5. Soldering and Assembly Guidelines

Proper handling is critical to ensure reliability and prevent damage to the LED.

5.1 Lead Forming

• Bend leads at a point at least 3mm from the epoxy bulb base.
• Perform forming before soldering.
• Avoid stressing the package. Misalignment during PCB mounting can cause stress and degradation.
• Cut leads at room temperature.

5.2 Storage

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

5.3 Soldering Process

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

Hand Soldering: Iron tip temperature ≤300°C (30W max), soldering time ≤3 seconds.

Wave/Dip Soldering: Preheat ≤100°C for ≤60 sec. Solder bath at ≤260°C for ≤5 sec.

Soldering Profile: A recommended temperature-time profile is provided, emphasizing controlled ramp-up, a defined peak temperature zone, and a controlled cooldown. A rapid cooldown process is not recommended.

Important: Avoid stress on leads during high-temperature phases. Do not solder (dip/hand) more than once. Protect the LED from shock/vibration until it cools to room temperature after soldering.

5.4 Cleaning

• Clean only if necessary using isopropyl alcohol at room temperature for ≤1 minute.
• Avoid ultrasonic cleaning. If absolutely required, pre-qualify the process to ensure no damage occurs.

5.5 Heat Management

Thermal management must be considered during PCB and system design. The operating current should be de-rated appropriately based on the ambient temperature and the provided de-rating curves to ensure long-term reliability and maintain performance.

6. Packaging and Ordering Information

6.1 Packing Specification

• Anti-static Bag: Protects the LEDs from electrostatic discharge during transport and handling.
• Inner Carton: Contains multiple bags.
• Outside Carton: The final shipping container.
• Packing Quantity: Minimum 200-500 pieces per bag. 6 bags per inner carton. 10 inner cartons per outside carton.

6.2 Label Explanation

Labels on the packaging contain several codes:

• CPN: Customer's Production Number
• P/N: Production Number (e.g., 383-2SDRC/S530-A3)
• QTY: Packing Quantity
• CAT: Ranks of Luminous Intensity (Binning)
• HUE: Ranks of Dominant Wavelength (Binning)
• REF: Ranks of Forward Voltage (Binning)
• LOT No: Lot Number for traceability

7. Application Suggestions and Design Considerations

7.1 Typical Application Circuits

This LED requires a simple series current-limiting resistor when driven from a voltage source. The resistor value (R) can be calculated using Ohm's Law: R = (V_source - V_F) / I_F. For a 5V supply and a target I_F of 20mA with V_F=2.0V, R = (5 - 2.0) / 0.02 = 150 Ω. A resistor with sufficient power rating (P = I²R) should be selected.

7.2 Design Considerations

• Current Drive: Always drive with a constant current or a current-limited source for stable brightness and longevity. Do not connect directly to a voltage source without a current limiter.
• PCB Layout: Ensure PCB holes align perfectly with LED leads to avoid mechanical stress. Provide adequate copper area or thermal vias for heat dissipation if operating at high ambient temperatures or near maximum current.
• Optical Design: The narrow 6° viewing angle makes this LED suitable for applications requiring a focused beam. For wider illumination, secondary optics (e.g., lenses) may be needed.

8. Technical Comparison and Differentiation

The 383-2SDRC/S530-A3 differentiates itself primarily through its use of AlGaInP semiconductor material, which is highly efficient for producing red and amber colors. Compared to older technologies or some broad-spectrum white LEDs used with filters, AlGaInP LEDs offer superior luminous efficacy for deep red light, resulting in higher brightness for a given input power. The specific 650nm peak wavelength provides a saturated color ideal for status indicators and backlights where color purity is important.

9. Frequently Asked Questions (Based on Technical Parameters)

9.1 What is the difference between Peak Wavelength (650nm) and Dominant Wavelength (639nm)?

Peak wavelength is the point of maximum power in the spectral output curve. Dominant wavelength is the single wavelength perceived by the human eye that matches the color of the light. The difference is due to the shape of the LED's emission spectrum and the sensitivity of the human eye (photopic response).

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

While possible, it is generally recommended to operate below the absolute maximum rating for improved long-term reliability and to account for temperature rises. The typical operating condition specified (20mA) is a safe and standard operating point that delivers the rated luminous intensity.

9.3 How critical is the 3mm minimum distance from the solder joint?

Very critical. Soldering closer than 3mm to the epoxy bulb can transfer excessive heat into the LED chip and internal wire bonds, potentially causing immediate failure or latent damage that reduces lifespan. This rule must be strictly followed during PCB design and assembly.

10. Practical Use Case Example

Scenario: Status Indicator on a Network Router

A designer needs a bright, unmistakable "Standby" or "Error" indicator. The 383-2SDRC/S530-A3 is an excellent choice. Its high luminous intensity (2000 mcd typical) ensures visibility even in well-lit rooms. The deep red color is universally associated with "stop" or "warning." The designer would:

1. Design the PCB with holes matching the LED's lead spacing.
2. Place a 150Ω current-limiting resistor in series with the LED, connected to a 5V GPIO pin from the router's microcontroller.
3. Program the microcontroller to turn the GPIO pin on/off to control the LED state.
4. Ensure the LED is placed on the router's front panel with a clear aperture, taking advantage of its narrow viewing angle to direct light toward the user.

This simple implementation provides a reliable, long-lasting, and highly visible status indicator.

11. Operating Principle Introduction

Light Emitting Diodes (LEDs) are semiconductor devices that emit light through electroluminescence. When a forward voltage is applied across the p-n junction of the semiconductor material (in this case, AlGaInP), electrons and holes recombine in the active region, releasing energy in the form of photons. The wavelength (color) of the emitted light is determined by the bandgap energy of the semiconductor material. AlGaInP has a bandgap suitable for producing light in the red to amber portion of the visible spectrum. The specific doping and structure of the chip are engineered to maximize the efficiency of this light generation process.

12. Technology Trends

The LED industry continues to focus on increasing luminous efficacy (more light output per watt of electrical input), improving color consistency and saturation, and enhancing reliability. For monochromatic LEDs like the deep red type, trends include pushing for even higher brightness in smaller packages, improving high-temperature performance for automotive and industrial applications, and further refining binning processes to provide designers with tighter tolerances on key parameters like wavelength and forward voltage. The drive for miniaturization and integration also continues, with LEDs being incorporated into more complex modules and systems.