May 28, 2025
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In today's rapidly evolving electronics market, high-efficiency LEDs like the VLDY1535G-08 from Vishay are in growing demand for their energy-saving capabilities and superior performance. This 589nm yellow SMD LED delivers exceptional 8000mcd brightness in a compact 2.3x2.3mm package, making it ideal for space-constrained applications. With RoHS compliance, wide temperature tolerance (-40°C to +100°C), and advanced AlInGaP technology, this component stands out for reliability in automotive, industrial, and consumer electronics. Read on to explore its technical advantages, selection criteria, and how it compares to alternatives in its class.
The VLDY1535G-08 is a surface-mount yellow LED manufactured by Vishay Semiconductor Opto Division, utilizing cutting-edge AlInGaP (Aluminum Indium Gallium Phosphide) technology. This 2.3V component combines high luminous intensity (8 cd) with a narrow 22° viewing angle, optimized for directional lighting applications.
| Parameter | Value | Standard |
|---|---|---|
| Forward Current (If) | 50 mA | IEC 60747-5-2 |
| Forward Voltage (Vf) | 2.3 V | JEDEC JS-7002 |
| Wavelength | 589 nm (Yellow) | CIE 1931 |
| Luminous Intensity | 8000 mcd (8 cd) | LM-80 |
| Viewing Angle | 44° (22° half-angle) | IESNA LM-79 |
| Operating Temperature | -40°C to +100°C | JESD22-A104 |
| Package Size | 2.3 x 2.3 x 2.6 mm | JEDEC MO-229 |
| ESD Protection | 2 kV (Human Body Model) | JESD22-A114-B |
When integrating the VLDY1535G-08 into your design, consider these critical factors:
Absolute Maximum Rating: 50 mA continuous current
Recommended Operation: 20-40 mA for optimal lifespan
Current Limiting: Always use series resistors (R = (Vsupply - Vf)/If)
Despite its small size, proper heat dissipation is crucial:
Maximum junction temperature: 100°C
Thermal resistance: 300 K/W (typical)
For high-temperature environments, reduce drive current by 1.5% per °C above 25°C
Lens Type: Non-diffused dome (1.8mm diameter)
Beam Pattern: Lambertian distribution (cosine falloff)
Color Consistency: Binning available per Vishay's TL-1 standard
The 589nm yellow wavelength meets ITE (Institute of Transportation Engineers) standards for caution indicators. Its high intensity ensures visibility in direct sunlight (≥5000 lux conditions).
Used in dashboard backlights and warning indicators, compliant with AEC-Q101 automotive qualification requirements.
Ideal for status indicators in HMI (Human-Machine Interface) systems due to its:
Long lifespan (>50,000 hours at 25°C)
Vibration resistance (passed 10G, 10-2000Hz per MIL-STD-883)
Global SMD LED Market Growth: 7.2% CAGR (Source: MarketsandMarkets)
Key Drivers: Automotive digitization, smart infrastructure, miniaturization
Price Trend: $0.08-$0.12/unit for 5000+ quantities
| Model | VLDY1535G-08 | Kingbright APT2012SYCK | Lite-On LTST-C191YKT |
|---|---|---|---|
| Intensity (mcd) | 8000 | 6000 | 5500 |
| Viewing Angle | 44° | 30° | 50° |
| Size (mm) | 2.3x2.3 | 2.0x1.25 | 2.0x1.2 |
| ESD Protection | 2kV | 1kV | 4kV |
| Best For | High-brightness directional | Space-constrained | ESD-sensitive |
Q1: What is the typical lifespan of the VLDY1535G-08?
A: Under recommended conditions (20mA, 25°C), expect >100,000 hours to L70 (70% initial luminosity) per IES TM-21 projections.
Q2: Can this LED be used in outdoor applications?
A: Yes, with proper conformal coating (IPC-CC-830B compliant) to protect against moisture ingress, as the device is MSL2A rated.
Q3: What PCB pad layout is recommended?
A: Vishay recommends 1.6x1.6mm pads with 0.3mm spacing (refer to package drawing SS-003 in the datasheet).
Q4: Is PWM dimming supported?
A: Yes, up to 1kHz frequency with <10% duty cycle minimum. Avoid reverse voltage during switching.
Q5: How does temperature affect color output?
A: Wavelength shifts approximately 0.07nm/°C (per CIE 015:2018), visually negligible in most applications.
The VLDY1535G-08 represents Vishay's commitment to high-performance micro-optoelectronics. Emerging applications include:
Micro-LED displays: As a backlight component for AR/VR devices
IoT indicators: Low-power variants under development (If=5mA)
Smart packaging: Integration with NFC antennas for product authentication
For pricing, samples, or technical support regarding the VLDY1535G-08 yellow SMD LED, contact our component specialists at [email protected]. We provide full datasheets, application notes, and custom binning services to meet your project requirements.
