Professional IC Distribution & Technical Solutions

Part Number: SS345SURWA/S530-A3/290

Manufacturer: EVERLIGHT

Specifications:

• Type: SMD LED
• Color: Red
• Wavelength: 620-625nm (typical)
• Luminous Intensity: 290mcd (minimum at 20mA)
• Forward Voltage: 1.8-2.2V (typical at 20mA)
• Reverse Current: ≤10μA (at 5V)
• Viewing Angle: 120°
• Package Type: PLCC-2 (Surface Mount)
• Dimensions: 3.2mm x 2.8mm x 1.9mm
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -40°C to +100°C

Descriptions:

The SS345SURWA/S530-A3/290 is a high-brightness red LED designed for surface-mount applications. It features a wide viewing angle and is suitable for backlighting, indicators, and general lighting purposes.

Features:

• High luminous intensity
• Low power consumption
• Wide viewing angle (120°)
• Compact PLCC-2 package
• RoHS compliant
• Lead-free and halogen-free

This LED is ideal for applications requiring reliable performance in a small form factor.

# Technical Analysis of EVERLIGHT SS345SURWA/S530-A3/290

## 1. Practical Application Scenarios

The EVERLIGHT SS345SURWA/S530-A3/290 is a high-performance optoelectronic component, typically used in sensing and switching applications. Key use cases include:

Industrial Automation

• Position Sensing: Integrated into assembly lines to detect object presence or alignment via infrared (IR) reflection.
• Safety Interlocks: Ensures machinery operates only when protective barriers are closed, reducing workplace hazards.

Consumer Electronics

• Proximity Detection: Used in smartphones and tablets to disable touchscreens during calls.
• Ambient Light Sensing: Automatically adjusts display brightness based on environmental lighting conditions.

Automotive Systems

• Gear Position Sensing: Monects transmission state in automatic vehicles.
• Liquid Level Detection: Confirms fuel or brake fluid levels via IR beam interruption.

These applications benefit from the component’s high sensitivity, low power consumption, and robust packaging.

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

Optical Misalignment

• Pitfall: Improper alignment between emitter and detector reduces signal integrity.
• Solution: Use precision mounting fixtures and verify alignment during prototyping with an oscilloscope.

Ambient Light Interference

• Pitfall: External light sources (e.g., sunlight) may trigger false positives.
• Solution: Implement modulated IR signals with synchronous detection to filter noise.

Thermal Drift

• Pitfall: Temperature fluctuations alter output characteristics.
• Solution: Select components with specified operating ranges (-40°C to +85°C) and incorporate thermal compensation circuits.

Electrical Overstress

• Pitfall: Voltage spikes damage the phototransistor or LED emitter.
• Solution: Add transient voltage suppressors (TVS) and current-limiting resistors.

## 3. Key Technical Considerations for Implementation

Optical Characteristics

• Wavelength: 940 nm IR emission ensures compatibility with standard phototransistors.
• Sensitivity: Verify detector response time (<10 µs) for high-speed applications.

Electrical Parameters

• Forward Current (IF): Do not exceed 50 mA to prevent LED degradation.
• Collector-Emitter Voltage (VCEO): Ensure phototransistor ratings match system voltage (typically 5V–24V).

Mechanical Integration

• Package: Surface-mount (SMD) design requires reflow soldering; avoid mechanical stress during assembly.
• Optical Path: Maintain a clear, unobstructed line-of-sight between emitter and detector.

By addressing these factors, designers can optimize reliability and performance in end-use environments.