📌 Product Overview
The XL-1608UBC-06FB is a standard 0603 (1608 metric) SMD Blue LED featuring a transparent water-clear colloid and a wide viewing angle. Designed for general indication and backlighting in consumer electronics and industrial devices, it provides a balance of luminosity and compact footprint. For engineering teams, the critical selection variables are the Forward Voltage (Vf) consistency for driving circuit design and the 120-degree viewing angle for light guide coupling. For procurement, the Moisture Sensitivity Level (MSL) 3 rating is the key constraint for storage and floor life management.
🎯 Typical Applications & Design Context
Based on its optical and electrical characteristics, the XL-1608UBC-06FB is ideally suited for:
- Status Indicators: Router and modem LEDs, where the wide 120° angle ensures visibility from off-axes positions.
- Consumer Backlighting: White appliances and keypads, leveraging the low power consumption (max 70mW).
- Industrial Instrumentation: Dashboard indicators that require operation within the -40°C to +85°C range.
- Automotive Interior: Non-critical indicator lights (refer to AEC-Q102 compliance for dashboard clusters).
📊 Key Technical Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|---|
| Luminous Intensity | Iv | 125 | - | 240 | mcd | IF = 20mA |
| Dominant Wavelength | λd | 460 | - | 475 | nm | IF = 20mA |
| Forward Voltage | Vf | 2.7 | - | 3.2 | V | IF = 20mA |
| Viewing Angle | 2θ1/2 | - | 120 | - | deg | IF = 20mA |
| Reverse Voltage | Vr | - | - | 5 | V | IR = 10μA |
💡 Insight: The wide Vf range (2.7V - 3.2V) implies significant variance in brightness if driven by a constant voltage source; strict constant current driving is recommended to ensure uniform luminosity across different production batches.
⚠️ Absolute Maximum Ratings & Process Limits
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Max Forward Current | IF | 20 | mA |
| Peak Pulse Current | IFP | 80 | mA |
| Power Dissipation | PD | 70 | mW |
| ESD Capability | ESD | 2000 | V |
| Operating Temperature | TOPR | -40 ~ +85 | °C |
⚠️ Failure Risk: The datasheet specifies an MSL (Moisture Sensitivity Level) of 3.
- Supply Chain Risk: Components must be baked before opening if the vacuum seal is broken. Floor life after opening is limited to 168 hours at <30°C/60% RH. Exceeding this limit without baking prior to Reflow soldering will cause "popcorning" (internal delamination/cracking) during the high-temperature peak of the soldering profile, leading to field failures.
🧩 Package, Dimensions & Assembly Notes
- Package Type: 0603 Surface Mount Device (SMD).
- Dimensions: 1.6mm (L) x 0.8mm (W) x 0.6mm (H).
- Soldering Profile: Compatible with standard Reflow soldering.
- Lead-Free Process: Peak temp 255°C (+0/-5°C) for 5-10 seconds.
- Lead Process: Peak temp 235°C (+5/-0°C) for 10-15 seconds.
- Tape Packaging: EIA standard compliant for automated pick-and-place machines.
👇 Assembly Note: Ensure the pick-and-place nozzle pressure is calibrated. The "water-clear" transparent lens can be prone to cosmetic scratching if the nozzle force is excessive or if tape cover peel-off is too aggressive.
🔍 Procurement & Sourcing Insights
- Binning & Consistency: The datasheet lists specific bins for Brightness (D3-D6), Voltage (M/N series), and Wavelength (HB04-HB06). When sourcing for high-volume consumer goods (e.g., remote controls), strictly enforcing Vf Binning is critical to prevent resistive value changes in your BOM from causing visible brightness differences.
- Sourcing Strategy: Since this is a standard commodity component, availability in Huaqiangbei or local distribution is generally high, but counterfeits often use lower-grade chips failing the "Anti-tin test" (pad peeling). Always verify traceability codes.
- Yield Management: For samples, verify the specific "Code" on the tape matches your requested bin (e.g., D5, N19-2) to avoid surprises during pilot runs.
❓ FAQ
Q: Can I drive this LED directly from a 3.3V MCU GPIO pin?
A: It is not recommended. The LED's Max Forward Voltage is 3.2V. When the LED heats up, Vf typically drops, but driving from 3.3V provides no current limiting headroom. The brightness may fluctuate with temperature. A series resistor or a dedicated constant current driver is required for reliability.
Q: What is the difference between "Dominant Wavelength" and "Peak Wavelength" in the specs?
A: Peak Wavelength (λp) is the physical maximum intensity on the spectrum curve (typically 460nm here). Dominant Wavelength (λd) is how the human eye perceives the color (460-475nm). For color matching in a backlight assembly, focus on Dominant Wavelength.
Q: The datasheet mentions MSL 3. What if I leave the reels open for a week?
A: An open reel at MSL 3 has a floor life of 168 hours (1 week). If exposed longer than 1 week at 30°C/60% RH, you must bake the components at 125°C for a specified time (usually 8-24 hours depending on carrier thickness) before reflow to prevent moisture-induced cracking.
Q: How do I select the correct brightness bin for my design?
A: If this is for a power indicator where battery life is critical, select a lower bin (e.g., D3/D4) and drive at 10-15mA. If for a specific ambient light sensor application or sunlight-readable status, select the highest bin (D6). Never mix bins on the same production run for a single SKU.
