📌 Product Overview
The XL-1608UBC-06FB is a standard 0603 (1608 metric) Surface Mount Device (SMD) LED designed by XINGLIGHT. It functions as a Blue light source (water clear colloid) with a dominant wavelength range of 460nm to 475nm.
For engineering teams, the critical selection variables are its forward voltage (Vf) range (2.7V-3.2V) and luminous intensity (125-240mcd). It is specifically engineered for applications requiring low power consumption and a wide 120° viewing angle, such as consumer appliance indicators, backlighting, and basic status icons. 💡
🎯 Typical Applications & Design Context
Based on its optical characteristics and package size, the XL-1608UBC-06FB is ideally suited for:
- Consumer Electronics & Smart Home: Status indicators on white goods and digital displays (nixie tube replacements) where board space is premium.
- Automotive Interior: Non-critical indicator lights and button backlighting (dashboard symbols) 🚗.
- Industrial & Comms: Signal lights on routers, set-top boxes, and industrial instrument panels.
- Medical Devices: Low-intensity indication for oximeters or endoscope equipment interfaces.
Why it fits: Its low power profile (max 20mA continuous) makes it ideal for battery-powered or densely populated PCBs where thermal management is a concern.
📊 Key Technical Specifications
| Parameter | Symbol | Test Conditions | Value (Min / Typ / Max) | Unit |
|---|---|---|---|---|
| Luminous Intensity | Iv | IF = 20mA | 125 / - / 240 | mcd |
| Dominant Wavelength | λd | IF = 20mA | 460 / - / 475 | nm |
| Forward Voltage | Vf | IF = 20mA | 2.7 / - / 3.2 | V |
| Viewing Angle | 2Ø1/2 | IF = 20mA | - / 120 / - | deg |
| Reverse Current | Ir | VR = 5V | - / - | ≤ 1 |
👉 Note: Brightness is graded into codes D3-D6, and voltage into M/N series. Design circuits to accommodate the full Vf spread to ensure consistent current across all bins.
⚠️ Absolute Maximum Ratings & Process Limits
| Parameter | Symbol | Max Value | Unit | Notes |
|---|---|---|---|---|
| Peak Forward Current | IFP | 80 | mA | Pulse width ≤0.1ms, Duty ≤1/10 |
| Continuous Forward Current | IF | 20 | mA | |
| Power Dissipation | PD | 70 | mW | |
| Reverse Voltage | VR | 5 | V | |
| ESD Tolerance | ESD | 2000 | V | Human Body Model (HBM) |
| Storage Temp | Tstg | -40 ~ +85 | °C |
⚠️ Engineering Insight:
- Soldering Limits: The component can withstand a maximum of 260°C for ≤6 seconds. Exceeding this during wave soldering or manual touch-up risks delaminating the internal die bond or cracking the epoxy lens.
- ESD Risk: With a 2000V rating, standard ESD precautions (wrist straps, ionizers) are mandatory during PCB assembly. Blue LEDs are often more ESD-sensitive than red/gunplastic types.
🧩 Package, Dimensions & Assembly Notes
- Package: 0603 (Imperial) / 1608 (Metric).
- Dimensions: 1.6mm (L) x 0.8mm (W) x 0.6mm (H).
- MSL (Moisture Sensitivity Level):Level 3.
- Action: Floor life is 168 hours after opening the sealed bag. If the SMT line is paused for longer, baking (125°C for 24h) is required to prevent "popcorning" (internal cracking) during reflow.
- Soldering: Compatible with standard Infrared Reflow (Lead-free profile peak 255°C recommended) and Wave soldering.
👇 Assembly Tip: The "water clear" (transparent) colloid provides higher brightness but is more susceptible to scratches during handling compared to diffused LEDs. Use pneumatic nozzles with soft covers in pick-and-place machines.
🔍 Procurement & Sourcing Insights
From a supply chain perspective, the XL-1608UBC-06FB presents specific considerations for OEM and EMS teams:
- Binning Management: The datasheet explicitly lists Brightness (D3-D6) and Voltage (M/N) bins. For mass production, you must specify the required bin code (e.g., "D5, N19-2") to your supplier. Failure to lock bins will result in visible brightness variation between batches of your end product. ✨
- Counterfeit Risk in Local Markets: In open markets (like Huaqiangbei), unsorted bulk 0603 LEDs are common. These often mix Grade A and Grade B chips. For instrumentation or automotive backlights, always require original packaging or vendor COA (Certificate of Analysis) to verify MSL and binning consistency.
- Lead Time: 0603 standard colors are typically stock items, but specific bins (e.g., very tight wavelength tolerance HB04/05/06) may have longer lead times.
❓ FAQ
Q: Can I drive this LED at 30mA for higher brightness?
A: No. The absolute maximum continuous forward current is 20mA. Driving it at 30mA will rapidly degrade the junction (thermal runaway) and significantly shorten lifespan. If you need more brightness, consider a larger package (e.g., 2835) or a high-efficiency variant.
Q: What does "MSL 3" mean for my SMT production line?
A: MSL 3 means the components absorb moisture from the air. Once the vacuum seal is broken, you have 168 hours (7 days) to solder them. If not used within 7 days, you must bake them at 125°C for 24 hours before reflow soldering to prevent internal moisture expansion damage.
Q: Why is the Forward Voltage (Vf) range so wide (2.7V - 3.2V)?
A: This is the manufacturing tolerance. Your driver circuit must handle this variance. If you use a simple resistor calculated for 2.7V at 20mA, the current might drop too low for a 3.2V LED, making it look dim. Design your current limiting resistor based on the worst-case (highest Vf) to ensure consistency.
Q: Are the voltage and brightness bins correlated?
A: Not necessarily. They are independent variables. You can have a high brightness LED with high Vf, or high brightness with low Vf. Procurement must select the correct combination code (e.g., D6 + N19-3) to match your PCB design.
