Professional IC Distribution & Technical Solutions

Manufacturer: EVERLIGHT

Part Number: ELF-346GWB/S295

Specifications:

• Type: LED (Light Emitting Diode)
• Color: White
• Lens Type: Water Clear
• Forward Voltage (Vf): 3.2V (typical)
• Forward Current (If): 20mA
• Luminous Intensity: 2000mcd (minimum)
• Viewing Angle: 30°
• Package Type: 3mm (T-1) Round LED
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -40°C to +100°C

Descriptions:

The ELF-346GWB/S295 is a high-brightness white LED from EVERLIGHT, designed for general-purpose lighting applications. It features a 3mm round package with a water-clear lens for enhanced light output.

Features:

• High luminous intensity (2000mcd min)
• Low power consumption
• Wide operating temperature range
• RoHS compliant
• Lead-free and halogen-free

This LED is suitable for indicators, backlighting, and display applications.

(Note: Always refer to the official datasheet for detailed technical parameters.)

# Technical Analysis of EVERLIGHT’s ELF-346GWB/S295 LED Component

## 1. Practical Application Scenarios

The ELF-346GWB/S295 is a high-performance surface-mount LED designed by EVERLIGHT, primarily optimized for applications requiring bright, efficient illumination with a wide beam angle. Key use cases include:

• Automotive Lighting: Suitable for daytime running lights (DRLs), interior ambient lighting, and dashboard backlighting due to its high luminous intensity and reliability under varying temperatures.
• Consumer Electronics: Integrated into LCD backlighting for displays, keypad illumination, and status indicators in smart devices.
• Industrial Indicators: Used in control panels, machinery status lights, and emergency signaling where long lifespan and consistent brightness are critical.
• Architectural Lighting: Employed in decorative and accent lighting due to its wide 120-degree beam angle and uniform light distribution.

The component’s ability to operate efficiently across a broad temperature range (-40°C to +85°C) makes it particularly valuable in harsh environments.

## 2. Common Design-Phase Pitfalls and Avoidance Strategies

Thermal Management Issues

Pitfall: Inadequate heat dissipation can lead to premature LED degradation.

Solution: Implement a PCB with sufficient thermal vias and copper pours. Use aluminum substrates for high-power applications.

Inconsistent Forward Voltage Matching

Pitfall: Variations in forward voltage (Vf) across parallel-connected LEDs can cause uneven brightness.

Solution: Ensure tight binning of Vf or use current-limiting resistors for each LED.

Optical Misalignment

Pitfall: Improper lens or reflector alignment reduces light output efficiency.

Solution: Verify mechanical tolerances in the housing design and use precision mounting techniques.

ESD Sensitivity

Pitfall: Electrostatic discharge (ESD) can damage the LED during handling.

Solution: Incorporate ESD protection diodes and follow proper anti-static protocols during assembly.

## 3. Key Technical Considerations for Implementation

• Electrical Parameters: Operates at a typical forward current of 20mA, with a maximum rating of 30mA. Exceeding this limit risks accelerated aging.
• Optical Performance: Delivers a dominant wavelength of 525nm (green) with a luminous intensity of 1200mcd (minimum).
• Mechanical Constraints: Compact 3.2mm x 2.8mm footprint requires precise pick-and-place assembly to avoid soldering defects.
• Environmental Robustness: Compliant with RoHS and AEC-Q101 for automotive-grade reliability.

By addressing these factors, designers can maximize the ELF-346GWB/S295’s performance while mitigating common integration challenges.