📌 Product Overview
The XL-1606UYC is a standard 0603 (1606 metric) SMD LED designed by XINGLIGHT, utilizing a water-clear colloid and a high-brightness yellow chip. It targets the volume consumer electronics and indicator markets. For engineering teams, this component represents a balance between cost-efficiency and standard optical performance. While the 1.8x2.4V forward voltage is typical, the critical selection variables for this model are the luminous intensity uniformity (80-210mcd range) and MSL3 sensitivity, which dictates floor life after opening the moisture barrier bag before reflow soldering.
🚀 Typical Applications & Design Context
- Status Indicators & Pilot Lamps: Ideal for PCB-mounted status lights on white goods or industrial control panels due to its wide 120° viewing angle.
- Consumer Mobile Devices: Suitable for mobile phone backlights or keypads where space is constrained (0603 footprint) and low power consumption (20mA max) is required.
- Electronic Displays: Used in segment or dot-matrix information displays where the HY03-HY06 wavelength binning ensures color consistency across the screen.
- Why it fits: The low thermal mass of the 0603 package allows for rapid SMT placement, while the wide viewing angle provides good visibility from oblique angles on user interface panels.
📊 Key Technical Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Condition |
|---|---|---|---|---|---|---|
| Luminous Intensity | Iv | 80 | - | 210 | mcd | IF = 20mA |
| Dominant Wavelength | λd | 585 | - | 595 | nm | IF = 20mA |
| Forward Voltage | VF | 1.8 | - | 2.4 | V | IF = 20mA |
| Viewing Angle | 2Ø1/2 | - | - | 120 | deg | IF = 20mA |
| Reverse Voltage | VR | - | - | 5 | V | - |
| ESD Capability | ESD | - | - | 2000 | V | Human Body Model |
💡 Note: Engineers should design drivers assuming a worst-case VF of 2.4V to ensure current limiting resistors are adequately sized, preventing thermal runaway in batches with higher VF codes (M18-5).
⚠️ Absolute Maximum Ratings & Process Limits
| Parameter | Symbol | Max Value | Unit | E-E-A-T Technical Insight |
|---|---|---|---|---|
| Max Power Dissipation | PD | 50 | mW | ⚠️ Exceeding this causes junction overheating, leading to rapid luminous depreciation or catastrophic failure. |
| Max Continuous Forward Current | IF | 20 | mA | 🚫 Derating is required if ambient temp exceeds 25°C. Continuous drive above 20mA will melt the bond wires. |
| Peak Forward Current | IFP | 80 | mA | ⚡ Only for pulses ≤0.1ms duty. Using 80mA DC will destroy the LED instantly. |
| Storage Temperature | TSTR | -40 ~ +85 | °C | 🔒 Storing outside this range risks epoxy lens cracking or delamination. |
| Soldering (Lead-Free) | TSOL | 260 | °C | ⚠️ Max 6 seconds exposure. Prolonged heat during wave soldering (if hand-soldering) can lift the pads. |
🔧 Package, Dimensions & Assembly Notes
- Package Size: 1.7mm (L) x 0.6mm (W) x 1.1mm (H).
- Soldering Profile: Compatible with standard Reflow SMT.
- Lead-Free: Peak temp 255°C (+0/-5°C), time above 217°C for 60-120s.
- With Lead: Peak temp 235°C (+5/-0°C), time above 183°C for 60-150s.
- MSL Level:3 (Level 3). This is a critical supply chain parameter. Floor life is 168 hours after opening the sealed bag. If the tape is left open longer than 1 week in a standard factory environment (30°C/60%RH), baking is mandatory (125°C for 24-48 hours based on J-STD-033) to prevent "popcorning" during reflow.
🔒 Procurement & Sourcing Insights
- Bin Management: The XL-1606UYC utilizes tight grading for Brightness (D2-D5), Voltage (M17-M18), and Wavelength (HY03-HY06). When ordering from local distributors or Huaqiangbei channels, verify if the stock is "Mixed Bin" or "Sorted Bin." Mixed bins result in uneven brightness on the same UI panel.
- Counterfeit Risk: As a standard 0603 commodity, this part is high-risk for counterfeiting (shaving or remarking lower-grade chips). Authentic XINGLIGHT reels will have EIA-481 standard labeling.
- MOQ & Lead Time: Typically available in cut-tape (low quantity) or full reel (4000 pcs). For mass production, insist on full reels to minimize moisture exposure during handling.
- Validation: Always request a sample lot from your designated supplier to verify the Color Coordinate (CIE) and VF match your current BOM before switching bulk suppliers.
❓ FAQ
Q: Can I drive this LED at 30mA for higher brightness?
A: No. The Absolute Maximum Rating for continuous forward current is 20mA. Driving at 30mA will drastically reduce lifespan and likely cause immediate thermal failure. Use a larger package (e.g., 3528 or 5050) if higher brightness is needed.
Q: What happens if I don't bake the reels after they have been open for more than 1 week?
A: Since the MSL is Level 3, moisture ingress will occur. During the reflow soldering peak (approx 250°C), the trapped moisture will expand violently, causing the epoxy package to crack or delaminate (popcorning). This leads to immediate failures or field returns weeks later.
Q: Are the voltage and brightness bins correlated?
A: Not strictly. A high brightness batch (D5) can still have a low forward voltage (M17). If your design relies on Vf to regulate brightness, you must sort by both codes.
Q: Is the "water clear colloid" suitable for outdoor use?
A: While the LED is rated for indoor/outdoor lighting, the 0603 package itself is not IP-rated. For outdoor applications, you must ensure the final product enclosure provides UV protection and water sealing, as long-term UV exposure can yellow the epoxy lens.
