Professional IC Distribution & Technical Solutions

The ELD-406GWA/P10 is a GaAs Infrared Emitting Diode manufactured by EVERLIGHT.

Specifications:

• Wavelength (λ): 940 nm (Typical)
• Forward Voltage (VF): 1.35 V (Typical at 20 mA)
• Forward Current (IF): 50 mA (Maximum)
• Power Dissipation (Pd): 75 mW
• Operating Temperature Range: -40°C to +85°C
• Viewing Angle: 20°
• Package Type: 5 mm Round LED (T-1 3/4)
• Lens Appearance: Water Clear

Descriptions & Features:

• High reliability and efficiency
• Suitable for infrared applications
• Compatible with automated placement equipment
• Pb-free and RoHS compliant
• Designed for remote control systems, sensors, and optoelectronic devices

For detailed performance curves and mechanical dimensions, refer to the official EVERLIGHT datasheet.

# Technical Analysis of EVERLIGHT’s ELD-406GWA/P10 LED Component

## Practical Application Scenarios

The ELD-406GWA/P10 is a high-brightness, surface-mount LED designed for applications requiring reliable illumination with low power consumption. Key use cases include:

1. Automotive Lighting – Used in daytime running lights (DRLs), interior lighting, and dashboard indicators due to its high luminous intensity and wide operating temperature range (-40°C to +85°C).

2. Industrial Indicators – Suitable for machinery status lights, control panels, and emergency signage, leveraging its robust construction and long lifespan (>50,000 hours).

3. Consumer Electronics – Integrated into backlighting for displays, smart home devices, and portable gadgets where consistent brightness and energy efficiency are critical.

4. Outdoor Displays – Employed in low-resolution signage and traffic signals, benefiting from its weather-resistant packaging (IP-rated variants available).

The LED’s 1206 SMD form factor ensures compatibility with automated PCB assembly, while its GaAsP (Gallium Arsenide Phosphide) material composition provides stable performance across varying environmental conditions.

## Common Design-Phase Pitfalls and Avoidance Strategies

1. Thermal Management Issues

• *Pitfall:* Excessive current drive without proper heat dissipation reduces lifespan.
• *Solution:* Implement a current-limiting resistor and ensure adequate PCB copper pour or heatsinking.

2. Inconsistent Forward Voltage Matching

• *Pitfall:* Variations in forward voltage (typ. 2.1V) can cause uneven brightness in parallel configurations.
• *Solution:* Use a constant-current driver or series wiring for uniform illumination.

3. Optical Misalignment

• *Pitfall:* Improper lens or reflector design leads to beam divergence or hotspots.
• *Solution:* Simulate light distribution using ray-tracing tools and verify with prototyping.

4. ESD Sensitivity

• *Pitfall:* Electrostatic discharge (ESD) can degrade the LED’s semiconductor junction.
• *Solution:* Incorporate ESD protection diodes and follow proper handling protocols (e.g., grounded workstations).

## Key Technical Considerations for Implementation

1. Electrical Parameters

• Forward current: 20mA (max 30mA pulsed)
• Reverse voltage: 5V (absolute max)
• Wavelength: 568nm (dominant, yellow-green)

2. Optical Performance

• Viewing angle: 120° (wide dispersion for uniform lighting)
• Luminous intensity: 20-40mcd (dependent on drive current)

3. Mechanical Compatibility

• Pad layout adheres to IPC-7351 standards for reflow soldering.
• Avoid mechanical stress during assembly to prevent epoxy lens cracking.

By addressing these factors, designers can optimize the ELD-406GWA/P10’s performance while mitigating reliability risks in end applications.