📌 Product Overview
The XINGLIGHT XL-502SURD is a standard F5 (5mm diameter) radial leaded LED featuring a red diffused lens and colloid. This component is engineered to provide high luminous intensity with a wide viewing angle, making it suitable for status indication and backlighting in printed circuit board assemblies.
💡 Design Focus: Targeting general-purpose indication, this device balances luminous efficacy (up to 900 mcd) with low forward voltage requirements (2.2V typical). It is constructed to meet RoHS compliance, utilizing an F5 package footprint that ensures compatibility with legacy and modern automated assembly processes.
🚀 Typical Applications
Based on the F5 footprint and optical parameters, the XL-502SURD is optimized for the following scenarios:
- Status Indication: ✅ Power on/off, signal transmission, and error status in consumer appliances and industrial control panels.
- Backlighting: 🖥️ Icon and switch illumination in automotive dashboards and household appliances.
- Digital & Communication: 👇 Signal display for routers, modems, and telecommunication devices.
- Specialized Electronics: ⏱️ Integration into digital clocks, electronic toys, and medical beauty instruments requiring visible red light cues.
📈 Key Technical Specifications
The following electrical and optical characteristics are measured at $T_a=25^\circ C$.
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Conditions |
|---|---|---|---|---|---|---|
| Luminous Intensity | $I_V$ | 400 | 600 | 900 | mcd | $I_F=20\text{mA}$ |
| Dominant Wavelength | $\lambda_d$ | 615 | 620 | 625 | nm | $I_F=20\text{mA}$ |
| Forward Voltage | $V_F$ | 1.8 | 2.2 | 2.4 | V | $I_F=20\text{mA}$ |
| Peak Wavelength | $\lambda_p$ | - | 625 | - | nm | $I_F=20\text{mA}$ |
| Viewing Angle | $2\theta_{1/2}$ | - | 30 | - | deg | $I_F=20\text{mA}$ |
| Spectral Width | $\Delta\lambda$ | - | 20 | - | nm | $I_F=20\text{mA}$ |
| Reverse Current | $I_R$ | - | - | 10 | $\mu A$ | $V_R=5\text{V}$ |
💡 Note: Luminous intensity is categorized into bins A5, A6, and A7. Voltage sorting (N12-7/8/9) allows for precise circuit matching. Wavelength binning (HR01/HR02) ensures color consistency.
🔒 Absolute Maximum Ratings & Process Limits
To ensure reliability and prevent catastrophic failure, designers must strictly adhere to these absolute maximum ratings ($T_a=25^\circ C$).
| Parameter | Symbol | Rating | Unit |
|---|---|---|---|
| Power Dissipation | $P_D$ | 70 | mW |
| Max Continuous Forward Current | $I_F$ | 20 | mA |
| Peak Forward Current | $I_{Fp}$ | 80 | mA |
| Operating Temperature | $T_{opr}$ | -20 to +85 | $^\circ C$ |
| Storage Temperature | $T_{stg}$ | -40 to +85 | $^\circ C$ |
⚠️ Soldering Limits:
- Reflow Soldering: Max 240°C for ≤6 seconds.
- Manual Welding: Max 300°C for ≤3 seconds.
- Lead Forming: Keep the welding point >2.0mm from the colloid bottom to prevent thermal damage to the epoxy resin.
📦 Package, Dimensions & Assembly Notes
The XL-502SURD utilizes the standard F5 (5mm) round radial package.
👇 Key Dimensions (mm):
- Diameter: 5.5mm
- Overall Length: 18.0mm (Typically 25mm including leads, check specific datasheet diagram if available, min 18mm body).
- Tolerance: $\pm0.50\text{mm}$ unless otherwise noted.
Assembly & Handling:
- MSL Level: 2 (Floor life > 1 year at $\le 30^\circ C$ / 60% RH).
- Packaging: Moisture-proof and anti-static EIA standard bulk/bag packaging.
- PCB Layout: Ensure drill holes accommodate the lead diameter (typically 0.5-0.6mm) and maintain sufficient spacing from adjacent components.
🛒 Sourcing & Supply Considerations
When integrating the XL-502SURD into mass production, procurement teams should prioritize:
- Binning Consistency: 🔒 Verify brightness (A5-A7) and voltage (N12-7/8/9) codes to ensure uniform appearance and current draw across batches.
- Authenticity: Sourcing through XINGLIGHT authorized channels prevents variance in chromaticity and reliability risks associated with untested substitutes.
- Lead-Time Management: The F5 platform is a mature technology, typically offering stable availability, but volume forecasts are recommended for specific wavelength sorting.
❓ Frequently Asked Questions
Q: What is the difference between the A5, A6, and A7 brightness codes?
A: These are luminous intensity bins. A5 covers 400-500 mcd, A6 covers 500-700 mcd, and A7 covers 700-900 mcd at 20mA. Selecting a single bin is crucial for consistent panel brightness in mass production.
Q: Can this LED be used in automotive environments?
A: The datasheet lists "Automotive Electronics" as an application, but the component is rated for $-20^\circ C$ to $+85^\circ C$. For exterior or under-hood applications requiring higher temperature ranges or AEC-Q102 qualification, specific verification is required.
Q: What is the recommended storage method if the LED is not used immediately?
A: Store at temperatures $\le 30^\circ C$ and humidity $\le 70%$. Use within 3 months of opening. For longer storage, use a sealed dry box with desiccant or nitrogen filling.
Q: How close to the epoxy body can I solder during manual assembly?
A: The datasheet specifies that the soldering point must be at least 2.0mm away from the bottom of the colloid (epoxy body) to prevent thermal damage.
Q: What is the MSL (Moisture Sensitivity Level) of this component?
A: The XL-502SURD is classified as MSL 2. This means it has a floor life of 1 year at $\le 30^\circ C$ / 60% RH after the moisture barrier bag is opened, before baking is required for reflow soldering.
