📌 Product Overview
The XL-504UYD from XINGLIGHT is a 5mm diffused Through-Hole Technology (THT) LED that emits a yellow luminous color (Dominant Wavelength 585–595nm). 📏 Housed in a standard F5 round epoxy package with long leads, this component is engineered for reliable indication in general circuit designs.
💡 The device utilizes a yellow colloid to enhance contrast and visibility. Its primary design focus lies in providing stable luminous intensity with low DC voltage requirements, making it suitable for status indicators on PCBs and panel assemblies where SMT integration is not required.
🎯 Typical Applications
Based on the XL-504UYD’s electrical characteristics and robust environmental ratings, this component is deployed across various sectors requiring reliable visual feedback:
- Automotive Electronics: Dashboard indicators and interior cabin lighting.
- Consumer Appliances: Status lights for home appliances and digital communication devices.
- Industrial & Education: Electronic clocks, teaching equipment, and traffic instruction panels.
- Decorative Lighting: Urban lighting projects and electronic toys requiring consistent color points.
⚡ Key Technical Specifications
📊 The following table outlines the electro-optical performance under standard test conditions ($T_a=25^\circ C$):
| Parameter | Symbol | Min | Typ | Max | Unit | Test Condition |
|---|---|---|---|---|---|---|
| Luminous Intensity | $I_V$ | 400 | 600 | 900 | mcd | $I_F=20mA$ |
| Dominant Wavelength | $\lambda_d$ | 585 | 590 | 595 | nm | $I_F=20mA$ |
| Forward Voltage | $V_F$ | 1.8 | 2.0 | 2.4 | V | $I_F=20mA$ |
| Peak Wavelength | $\lambda_p$ | - | 590 | - | nm | $I_F=20mA$ |
| Viewing Angle | $2\theta_{1/2}$ | - | 30 | - | deg | $I_F=20mA$ |
| Reverse Current | $I_R$ | - | - | $\le10$ | $\mu A$ | $V_R=5V$ |
💡 Design Insight: The specified viewing angle of 30 degrees combined with a luminous intensity binning range of 400–900 mcd allows for precise brightness selection tailored to specific ambient light conditions.
⚠️ Absolute Maximum Ratings & Process Limits
To ensure reliability and prevent catastrophic failure during operation or assembly, designers must strictly adhere to these limits ($T_a=25^\circ C$):
| Parameter | Symbol | Max Value | Unit | Notes |
|---|---|---|---|---|
| Power Dissipation | $P_D$ | 70 | mW | Derating above 25°C required |
| Continuous Forward Current | $I_F$ | 20 | mA | |
| Peak Forward Current | $I_{Fp}$ | 80 | mA | Pulse width/duty cycle limited |
| Operating Temperature | $T_{opr}$ | -20 ~ +85 | °C | |
| Storage Temperature | $T_{stg}$ | -40 ~ +85 | °C | |
| Soldering (Reflow) | $T_{sol}$ | 240 | °C | $\le 6s$ (Wave soldering) |
| Soldering (Manual) | $T_{sol}$ | 300 | °C | 3s max, tip > 2.0mm from body |
🔒 Risk Control: The Moisture Sensitivity Level (MSL) is classified as Level 2. Components must be mounted within 1 year of sealing date, or baked according to IPC/JEDEC J-STD-033 if exposed to ambient >30°C/60% RH.
📦 Package, Dimensions & Assembly Notes
The XL-504UYD features a standard F5 epoxy bulb with a diameter of 5.0mm and an overall length of approximately 28mm (including long leads).
- Dimensions: The bulb diameter is 5.0mm + 0.5mm tolerance.
- Lead Spacing: Standard 2.54mm (0.1") pitch for compatibility with most PCB drills and perfboards.
- Soldering Guide: Ensure the soldering point maintains a distance of at least 2.0mm from the bottom of the epoxy colloid to prevent thermal damage to the internal die bond.
- Packaging: Supplied in moisture-proof and anti-electrostatic foil bags, compliant with EIA standards for safe transport and storage.
📈 Sourcing & Supply Considerations
When integrating the XL-504UYD into mass production, consider these supply chain factors to maintain yield and consistency:
- Binning & Grading: Verify voltage (N12) and brightness (A5-A7) bin codes to ensure uniformity across batches, crucial for dashboard lighting and aesthetic consistency.
- ** authenticity Channels:** Source through authorized distributors to guarantee compliance with ROHS environmental protection standards.
- Lead Time Management: As a standard F5 product, lead times are generally stable, but forecasting high-volume consumption (e.g., for urban lighting projects) is recommended.
- Samples: Request samples from the specific production batch to validate color coordinates ($\pm0.01$ deviation) before full-scale PCB assembly.
❓ FAQ
Q: What is the forward voltage requirement for the XL-504UYD?
A: The typical forward voltage is 2.0V, with a maximum of 2.4V at 20mA. Designers should calculate current-limiting resistor values based on a supply voltage and a target forward current of 20mA for optimal brightness and longevity.
Q: Can this LED be used for outdoor traffic indicators?
A: Yes, the datasheet explicitly lists "Traffic instructions" as an application. However, for outdoor use, designers must account for the operating temperature range (-20°C to +85°C) and ensure adequate enclosure sealing against environmental ingress.
Q: What are the soldering limitations for this component?
A: For manual welding, the iron temperature must not exceed 300°C for more than 3 seconds. For wave soldering, the limit is 240°C for ≤6 seconds. Crucially, the solder joint must be >2.0mm away from the LED body base.
Q: How is the brightness categorized?
A: The luminous intensity is binned into codes A5 (400-500 mcd), A6 (500-700 mcd), and A7 (700-900 mcd) measured at 20mA. Selecting the correct bin code is essential for achieving consistent visual brightness across a panel of indicators.
Q: Does this LED meet RoHS standards?
A: Yes, the XL-504UYD is an environmental protection product that meets ROHS requirements, ensuring it is free from hazardous substances above the threshold limits for electronic equipment.
Q: What is the storage shelf life?
A: When stored in the original moisture-proof bag at conditions not exceeding 30°C and 70% relative humidity, the components are recommended for use within three months. For longer storage, use a dry cabinet or nitrogen-filled storage.
