📌 Product Overview
The XL-504UBD from XINGLIGHT is a standard 5mm round blue LED featuring extended "long legs" (28mm length) to facilitate specific wave-soldering processes or chassis mounting requirements. This device utilizes a blue colloid epoxy encapsulation, matching the 465nm peak wavelength emission.
💡 Design Focus: This component is engineered for general-purpose indication where standard through-hole assembly is preferred over SMT. It balances luminous intensity—ranging from 300 to 900 mcd—with energy efficiency, driven by a low DC forward voltage. While compliant with RoHS standards, engineers must note the Moisture Sensitivity Level (MSL) of 2, requiring controlled handling prior to assembly to prevent popcorn cracking during reflow.
💡 Typical Applications
The XL-504UBD serves a broad range of indicator and aesthetic lighting functions. Its 460–475nm wavelength makes it suitable for status signals and backlighting accents.
- Consumer Electronics: Status indicators for home appliances and digital communication devices.
- Automotive: Interior panel illumination and dashboard indicators (non-critical lighting).
- Industrial & Education: Electronic teaching equipment, clock displays, and traffic instruction signals.
- Medical & Decor: Instrumentation panels in beauty devices and urban lighting accent strips.
- Toys: Interactive indicators in electronic toys requiring robust leaded components.
⚡ Key Technical Specifications
📉 The following electrical optical characteristics are measured at an ambient temperature of 25°C (Ta=25°C) with a forward current of 20mA.
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Test Conditions |
|---|---|---|---|---|---|---|
| Luminous Intensity | Iv | 300 | 600 | 900 | mcd | IF=20mA |
| Dominant Wavelength | λd | 460 | 465 | 475 | nm | IF=20mA |
| Peak Wavelength | λp | — | 465 | — | nm | IF=20mA |
| Forward Voltage | VF | 2.8 | 3.0 | 3.4 | V | IF=20mA |
| Viewing Angle | 2Ø1/2 | — | 30 | — | deg | IF=20mA |
| Reverse Current | IR | — | — | ≤10 | μA | VR=5V |
🔍 Note: Variance in light intensity is ±10%, and voltage tolerance is ±0.1V. Wavelength deviation is within ±1nm.
⚠️ Absolute Maximum Ratings & Process Limits
Exceeding these ratings may cause device failure or permanent performance degradation. These limits define the stress boundaries for the XL-504UBD.
| 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 ≤ 10ms |
| Operating Temperature | Topr | -20 ~ +85 | °C | |
| Storage Temperature | Tstg | -40 ~ +85 | °C | |
| Soldering (Reflow) | Tsol | 240 | °C | Max 6 seconds |
| Soldering (Manual) | Tsol | 300 | °C | Max 3 seconds |
⚠️ Critical: The soldering point must remain at least 2.0mm above the bottom of the epoxy colloid to prevent thermal damage to the active junction.
📦 Package, Dimensions & Assembly Notes
The XL-504UBD features a standard F5 (5mm) diffusion lens package with a cylindrical body. The "long leg" variant typically specifies a total length of 28mm (5.55.08.7*28mm) to aid in specific assembly fixtures.
- Dimensions: All dimensions are in millimeters. Tolerances are generally ±0.50mm unless otherwise noted.
- Packaging: Supplied in EIA standard compliant bags, utilizing moisture-proof and anti-static foil bags to preserve MSL 2 integrity.
- Assembly: The leads are designed for wave soldering or manual insertion. For flow soldering, ensure the pre-heat temperature profile does not violate the storage temperature limits to avoid delamination.
🚀 Sourcing & Supply Considerations
When integrating the XL-504UBD into BOMs, procurement teams should verify binning codes to ensure color and brightness consistency across production batches.
- Binning Verification: Confirm specific brightness (A4-A7) and voltage (N13-3/4/5) codes with the distributor if the application requires strict uniformity.
- Authenticity: Source exclusively through authorized channels to guarantee ROHS compliance and moisture protection integrity.
- Lead Time: As a standard 5mm LED, this part typically offers stable availability, but volume orders should be placed in advance to secure specific bin grades.
❓ FAQ
Q: What is the typical forward voltage for the XL-504UBD?
A: The typical forward voltage (VF) is 3.0V at a standard test current of 20mA, ranging from a minimum of 2.8V to a maximum of 3.4V.
Q: Can this LED be used in outdoor environments?
A: The storage and operating temperatures support standard environments, but the epoxy colloid is not specifically rated for UV exposure. For outdoor use, additional IP-rated protection is recommended to prevent long-term degradation of the lens.
Q: What does "Moisture Sensitivity Level 2" mean for assembly?
A: MSL 2 means the components can be exposed to ambient conditions (≤30°C / 60% RH) for up to one year before baking is required. If floor life exceeds this, or if the bag is opened, a bake-out procedure may be necessary before soldering.
Q: How do I interpret the brightness codes (A4, A5, etc.)?
A: These codes group the LEDs by luminous intensity. A4 covers 300-400 mcd, while A7 covers 700-900 mcd. Selecting a specific code ensures your light output is consistent across the final product.
Q: What is the peak wavelength of this blue LED?
A: The peak wavelength (λp) is 465nm, placing it in the standard blue spectrum, suitable for dashboard lights and indicators.
Q: Are the long leads compatible with automatic insertion machines?
A: Yes, the 28mm length and F5 diameter are generally compatible with standard axial lead insertion equipment, provided the component track and cut-off tools are calibrated for the longer leg length.
