📌 Product Overview
The XL-3528UVA is a compact Surface Mount Device (SMD) LED designed by XINGLIGHT for specific Ultraviolet A (UV-A) emission. 📏 With standard 3528 footprint dimensions (3.5x2.8x1.9mm), it provides a balance of size and performance for applications requiring 395nm–405nm wavelengths.
🛠️ This component is engineered for automated SMT production lines. It features a transparent water-clear colloid optimized for UV transmission while maintaining compliance with ROHS environmental standards. Designers should focus on the MSL 3 rating and specific forward voltage requirements when integrating this into drive circuits.
💡 Typical Applications
Based on its dominant wavelength of 395-405nm and luminous intensity, the XL-3528UVA is suitable for specialized lighting scenarios:
- Curing & Sterilization: Utilizing the UV-A spectrum for resin curing or surface sanitation in enclosed modules.
- Counter & Jewelry Display: High-contrast lighting to enhance the visual appeal of items under UV light.
- Advertising & Luminescent Characters: Powering "black light" effects in signage and decorative channel letters.
- Auxiliary Indoor Lighting: Supplementing primary lighting systems where UV effects are desired.
📊 Key Technical Specifications
🔍 The following optical and electrical characteristics are measured under standard test conditions ($T_a=25^\circ C$, $I_F=20mA$).
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|---|
| Luminous Intensity | $I_V$ | 80 | - | 180 | mcd | $I_F=20mA$ |
| Dominant Wavelength | $\lambda_d$ | 395 | - | 405 | nm | $I_F=20mA$ |
| Forward Voltage | $V_F$ | 2.8 | - | 3.4 | V | $I_F=20mA$ |
| Viewing Angle | $2\theta_{1/2}$ | - | 120 | - | deg | $I_F=20mA$ |
| Half Wave Width | $\Delta\lambda$ | - | 15 | - | nm | $I_F=20mA$ |
⚠️ Design Note: The forward voltage can range up to 3.4V; ensure your LED driver constant current source can handle this variance at 20mA.
🚨 Absolute Maximum Ratings & Process Limits
🔒 To ensure reliability and prevent catastrophic failure, these stress limits must never be exceeded during operation or storage.
| Parameter | Symbol | Value | Unit | Notes |
|---|---|---|---|---|
| Max Power Dissipation | $P_D$ | 70 | mW | |
| Max Continuous Forward Current | $I_F$ | 20 | mA | |
| Peak Forward Current | $I_{FP}$ | 80 | mA | Pulse $\le 0.1ms$, Duty $\le 1/10$ |
| Max Reverse Voltage | $V_R$ | 5 | V | |
| ESD Ability | ESD | 2000 | V | Human Body Model (HBM) |
| Operating Temperature | $T_{OPR}$ | -40 ~ +85 | $^\circ C$ | |
| Storage Temperature | $T_{STR}$ | -40 ~ +85 | $^\circ C$ |
⚠️ Warning: Exceeding the 20mA continuous current or the 5V reverse voltage will permanently degrade the LED chip.
📦 Package, Dimensions & Assembly Notes
🏗️ The XL-3528UVA utilizes industry-standard EIA packaging compatible with modern infrared reflow soldering processes.
- Dimensions: The outline measures 3.5mm x 2.8mm with a height of 1.9mm.
- Soldering: It is suitable for infrared reflow.
- Lead Process: Max peak 260$^\circ$C (within 6 seconds).
- Lead-Free Process: Max peak 255$^\circ$C.
- Moisture Sensitivity: Classified as MSL 3. Components must be baked according to J-STD-033 if exposed to ambient moisture for more than 168 hours before reflow to prevent "popcorning" or delamination.
🚀 Sourcing & Supply Considerations
✅ When planning for mass production, consider the following supply chain factors to ensure seamless integration:
- Bin Selection: Verify specific bin codes (D2-D4 for brightness, SZ06-SZ07 for wavelength) to ensure color consistency across batches.
- Authenticity: Source through XINGLIGHT authorized channels to avoid counterfeit components that may fail reliability tests.
- Sample Evaluation: Always request samples from the specific production batch before committing to large volume orders.
- Packaging: Confirm tape and reel specifications match your pick-and-place machine feeders.
❓ FAQ
Q: What is the peak current capability for pulsed operations?
A: The XL-3528UVA can handle a peak forward current ($I_{FP}$) of up to 80mA. However, this is strictly limited to pulse widths $\le 0.1ms$ and a duty cycle $\le 1/10$. Do not exceed this in continuous operation.
Q: Can I use a standard lead-free reflow profile for this component?
A: Yes, the XL-3528UVA is designed for lead-free processes. The maximum peak temperature allowed is 255$^\circ$C ($+0/-5^\circ$C), with time above 217$^\circ$C strictly controlled between 60-120 seconds.
Q: What precautions should I take regarding storage?
A: The component has a Moisture Sensitivity Level (MSL) of 3. If the vacuum-sealed bag is open and the components are not mounted within 168 hours (1 week), they must be baked at 80$^\circ$C for 24 hours to remove moisture before reflow soldering.
Q: Why is the forward voltage range (2.8V - 3.4V) important?
A: This variance affects how you design your constant current driver. If you design for a 2.8V drop without accounting for the 3.4V maximum, some LEDs might be underdriven or the driver might fail to regulate current properly across the batch.
Q: Is this component suitable for outdoor use?
A: While the operating temperature supports -40 to +85$^\circ$C, the datasheet specifies "Indoor lighting" applications. For outdoor use, additional protective encapsulation against UV degradation and water ingress (IP rating) is required.
