📌 Product Overview
The XINGLIGHT XL-257UGC-L is a standard 3mm radial LED featuring a white water-clear diffused colloid that emits green light at a peak wavelength of 525nm. Designed for general-purpose indication on printed circuit boards (PCBs), this component offers a balance between visibility (typical 1500 mcd) and power consumption (70mW). It is engineered to meet ROHS environmental standards and provides a viewing angle of 110 degrees, making it suitable for dashboard illumination and status indicators where wide-angle visibility is required.
💡 Typical Applications
- Industrial & Consumer Electronics: Status indicators for home appliances, digital communication devices, and electronic teaching equipment.
- Automotive & Traffic: Dashboard backlighting and interior signal lights (non-critical illumination).
- Instrumentation: Indicator panels for medical beauty instruments and electronic clocks.
- Urban Infrastructure: Traffic instructions and city lighting decorations requiring reliable through-hole technology.
📊 Key Technical Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions |
|---|---|---|---|---|---|---|
| Luminous Intensity | Iv | 900 | 1500 | 1800 | mcd | IF = 20mA |
| Dominant Wavelength | λd | 515 | 520 | 530 | nm | IF = 20mA |
| Forward Voltage | VF | 2.8 | 3.0 | 3.4 | V | IF = 20mA |
| Viewing Angle | 2Ø1/2 | - | 110 | - | deg | IF = 20mA |
| Reverse Current | IR | - | - | ≤10 | μA | VR = 5V |
Note: Designers should account for a luminous intensity tolerance of ±10% and voltage deviation of ±0.1V when calculating driver circuit limits.
⚠️ Absolute Maximum Ratings & Process Limits
Exceeding these ratings may cause permanent device failure or significant degradation in optical performance. These limits are critical for designing robust protection circuits.
| Parameter | Symbol | Rating | Unit | Notes |
|---|---|---|---|---|
| Power Dissipation | Pd | 70 | mW | Derate above 25°C ambient |
| Max Continuous Forward Current | IF | 20 | mA | |
| Peak Forward Current | IFp | 80 | mA | Pulse width dependent |
| Operating Temperature | Topr | -20 to +85 | °C | |
| Storage Temperature | Tstg | -40 to +85 | °C | |
| Soldering (Wave) | Tsol | 240 | °C | Max 6 seconds |
| Soldering (Manual) | Tsol | 300 | °C | Max 3 seconds; >2mm from body |
📦 Package, Dimensions & Assembly Notes
- Dimensions: The component features a cylindrical bulb with a diameter of 5.0mm and a length of 28mm (including leads).
- Tolerance: Standard mechanical tolerances are set at ±0.50mm unless otherwise noted.
- MSL Level: The device is classified at Moisture Sensitivity Level 2 (MSL 2).
- Assembly: Ensure the soldering point maintains a distance of at least 2.0mm from the bottom of the colloid to prevent thermal damage to the epoxy resin during wave or manual soldering processes.
🚀 Sourcing & Supply Considerations
- Binning Codes: Verify brightness (A8/A9/B1) and voltage (N13-3/4/5) bin codes to match circuit driver requirements.
- Packaging: Components are shipped in moisture-proof and anti-electrostatic foil bags to preserve MSL integrity.
- Authenticity: Cross-reference the packaging label with the datasheet model XL-257UGC-L to ensure supply chain accuracy.
- Samples: Request pre-production samples to validate color temperature and intensity consistency before full-scale procurement.
❓ FAQ
Q: What is the forward voltage requirement for the XL-257UGC-L?
A: The typical forward voltage is 3.0V, with a maximum of 3.4V at 20mA. Designers should ensure the supply voltage can handle the maximum drop to maintain consistent current.
Q: Can this LED be used in high-temperature environments?
A: Yes, the operating ambient temperature range is -20°C to +85°C. However, power dissipation must be managed to prevent exceeding the junction temperature limits.
Q: What are the soldering constraints for this component?
A: For wave soldering, do not exceed 240°C for 6 seconds. For manual welding, the limit is 300°C for 3 seconds. Crucially, the solder joint must be >2mm from the LED body base.
Q: How is luminous intensity categorized?
A: Intensity is sorted into bins: A8 (900-1200 mcd), A9 (1200-1500 mcd), and B1 (1500-1800 mcd). Selecting the correct bin is vital for visual uniformity across panels.
Q: Is the XL-257UGC-L RoHS compliant?
A: Yes, the datasheet explicitly states that the product is environmentally friendly and meets ROHS requirements, making it suitable for global markets.
Q: What is the peak forward current?
A: The peak forward current is rated at 80mA. This is intended for pulsed operation; continuous operation should not exceed 20mA.
