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Vishay Semiconductor Opto Division VLDS1535R-08
- Part No.:
- VLDS1535R-08
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- 2-SMD, Z-Bend
- Datasheet:
-
VLDS1535R-08.pdf
- Description:
- LED RED CLEAR 2SMD BOTTOM ENT
- Quantity:
- Payment:
- Shipping:
Inventory:5,192
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Product details
Overview
VLDS1535R-08 from Vishay Semiconductors is a super red dome lens SMD LED using AlInGaP-on-Si chip technology, delivering 2800–9000 mcd luminous intensity at 50 mA, with dominant wavelength 626–637 nm and ±22° viewing angle. It supports DC forward current up to 70 mA and operates across –40 °C to +100 °C ambient temperature for traffic signal and industrial indicator applications.
For engineers reviewing the VLDS1535R-08 datasheet, VLDS1535R-08 pinout, VLDS1535R-08 application, or VLDS1535R-08 equivalent, key selection criteria include luminous intensity binning (CA–EA groups), forward voltage range (1.9–2.7 V at 50 mA), thermal resistance (325 K/W), ESD rating (2 kV HBM), and compatibility with J-STD-020 reflow profiles.
Technical Context
The VLDS1535R-08 employs an AlInGaP-on-Si die optimized for high-luminance super red emission, with spectral bandwidth of 18 nm and peak wavelength at 639 nm. Its gullwing surface-mount package enables direct PCB mounting without through-hole assembly.
Thermal performance is defined by junction-to-ambient thermal resistance of 325 K/W when mounted on a PCB pad >16 mm². The device meets JEDEC level 2a preconditioning and JESD22-A114-B ESD requirements (2 kV HBM), supporting automated reflow soldering per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 2800–9000 mcd at 50 mA - defines brightness range for visual signaling under standard drive conditions |
| Dominant wavelength | 626–637 nm - specifies super red chromaticity compliant with traffic signal color standards |
| Forward voltage | 1.9–2.7 V at 50 mA - determines series resistor sizing and power supply headroom requirements |
| Viewing angle | ±22° half-intensity - sets optical beam spread for directional indication and uniform panel illumination |
| Max DC forward current | 70 mA at Tamb ≤ 60 °C - establishes continuous drive capability without derating below 60 °C ambient |
| Thermal resistance | 325 K/W - quantifies junction temperature rise per watt dissipated, critical for lifetime estimation |
| ESD withstand | 2 kV HBM - indicates handling robustness during PCB assembly and system integration |
Pinout & Package
VLDS1535R-08 uses a reverse gullwing SMD package (2.3 × 2.3 × 2.6 mm) with exposed copper thermal pad. Cathode and anode terminals are identified by physical pin orientation per Vishay drawing 6.544-5409.01-4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive DC input terminal | Connected to current-limiting resistor or constant-current driver output; polarity must be observed to avoid reverse breakdown |
| Cathode | Negative DC return terminal | Typically tied to ground or low-side switch; provides thermal path via exposed copper pad beneath package |
Key Features
| Feature | Design Value |
|---|---|
| AlInGaP-on-Si chip technology | Enables high luminous flux and stable super red output with improved thermal conductivity vs. epoxy-based substrates |
| Clear dome lens encapsulation | Provides ±22° viewing angle and high light extraction efficiency without secondary optics |
| Luminous intensity binning | IVmax/IVmin ≤ 1.6 per reel ensures consistent brightness across production batches for uniform panel appearance |
| Reflow-solder compatible | Rated for peak reflow temperature up to 260 °C per J-STD-020, enabling standard SMT line integration |
| JEDEC level 2a preconditioning | Validates moisture sensitivity and process robustness for high-yield manufacturing in humid environments |
Applications
| Traffic Signal Modules | Industrial Control Panels |
|---|---|
Use Scenario: Red status indicators in vehicular traffic light controllers and pedestrian crossing systems. IC Role / Device Role / Timing Role: Visual status emitter providing fail-safe red indication with high ambient visibility. Use Value: 9000 mcd max intensity and ±22° beam ensure legibility at >100 m distance under daylight conditions. |
Use Scenario: Power-on and fault indicators on factory HMIs, PLC I/O modules, and safety-rated panels. IC Role / Device Role / Timing Role: Human-machine interface element conveying operational state without microcontroller intervention. Use Value: 70 mA DC rating and –40 °C to +100 °C operating range support long-term reliability in uncontrolled industrial enclosures. |
| Audio/Video Equipment Indicators | Backlit Symbol Displays |
Use Scenario: Power, mute, and record status lights on professional audio mixers and broadcast monitors. IC Role / Device Role / Timing Role: Low-power visual feedback component driven directly from logic-level outputs. Use Value: 1.9–2.7 V VF range matches standard 3.3 V or 5 V rail operation with minimal external components. |
Use Scenario: Illuminated pushbutton symbols and function labels on medical devices and test equipment front panels. IC Role / Device Role / Timing Role: Directional backlight source aligned to molded lens geometry for even symbol illumination. Use Value: Clear dome lens and ±22° viewing angle deliver uniform brightness across 8–12 mm symbol areas without diffusion films. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super red LED applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VLDR1535R-08 | Higher luminous intensity (3550–11200 mcd), red (not super red) dominant wavelength (619–631 nm) | Better suited for general-purpose red signaling where chromaticity tolerance is wider than traffic-grade super red | Select when higher brightness is prioritized over strict 626–637 nm chromaticity compliance |
| VLDK1535R-08 | Orange-red dominant wavelength (611–621 nm), 4500–14000 mcd intensity, VF up to 2.7 V | Used where amber-shifted red is required for differentiation (e.g., warning vs. stop functions) | Choose for applications requiring distinct orange-red hue while maintaining same package and thermal profile |
Compared with VLDS1535R-08, VLDR1535R-08 offers higher intensity but looser chromaticity control, while VLDK1535R-08 shifts wavelength toward orange-red-both retain identical 2.3 × 2.3 mm reverse gullwing package and 325 K/W thermal resistance, enabling drop-in layout reuse where color specification permits.
Availability
VLDS1535R-08 is available at Aetrix Electronics and suitable for traffic signal modules, industrial control panels, and audio/video equipment indicators requiring stable component supply, consistent luminous intensity binning, and high-temperature operational reliability.
Supply support for VLDS1535R-08 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Semiconductors designs and manufactures discrete semiconductors and optoelectronics with emphasis on reliability, precision, and application-specific performance.
The VLDS1535R-08 belongs to Vishay's power SMD LED product series, engineered for high-brightness visual indication in demanding outdoor and industrial environments where thermal stability and color consistency are critical.
FAQ
What is the maximum DC forward current rating for VLDS1535R-08?
The VLDS1535R-08 has a maximum DC forward current of 70 mA when ambient temperature is ≤60 °C. At higher ambient temperatures, derating is required per Figure 1 in the datasheet. This rating enables sustained operation in high-duty-cycle indicator applications without thermal runaway, provided PCB thermal design meets the 325 K/W junction-to-ambient specification. The VLDS1535R-08 must not be operated above 70 mA under continuous DC conditions.
Does VLDS1535R-08 require current-limiting circuitry?
Yes, VLDS1535R-08 requires external current limiting-either a series resistor or constant-current driver-because its forward voltage varies from 1.9 V to 2.7 V at 50 mA. Without current control, variations in supply voltage or temperature could cause excessive current flow, exceeding the 70 mA absolute maximum and accelerating lumen depreciation. The VLDS1535R-08 is not internally regulated and relies on precise external biasing for stable photometric output.
What does the "-08" suffix indicate in VLDS1535R-08?
The "-08" suffix in VLDS1535R-08 denotes the tape-and-reel packaging configuration: 1500 pieces per reel, conforming to EIA-481 standard carrier tape dimensions and Vishay's taping specification 9.800-5138.01-4 for reverse gullwing variants. It does not indicate electrical binning, wavelength group, or intensity grade-the VLDS1535R-08 part number itself encompasses multiple luminous intensity (CA–EA) and dominant wavelength bins shipped separately per reel.
Can VLDS1535R-08 be used in outdoor traffic signals?
Yes, VLDS1535R-08 is qualified for outdoor traffic signal use due to its super red chromaticity (626–637 nm dominant wavelength), high luminous intensity (up to 9000 mcd), and operating temperature range of –40 °C to +100 °C. Its clear dome lens and ±22° viewing angle meet ITE and EN 12368 visibility requirements when arrayed in modular configurations. The VLDS1535R-08 must be mounted on thermally adequate PCBs to maintain junction temperature below 125 °C under continuous operation.
Is VLDS1535R-08 compatible with lead-free reflow soldering processes?
Yes, VLDS1535R-08 is fully compatible with lead-free reflow soldering per J-STD-020, supporting a peak package body temperature of up to 260 °C for ≤10 seconds. The recommended profile includes ramp rates ≤3 °C/s (up) and ≤6 °C/s (down), with time above 217 °C limited to 60–150 seconds. The VLDS1535R-08 has undergone JEDEC level 2a preconditioning and carries Vishay's Pb-free and RoHS-compliant markings per its standard bar code label.
VLDS1535R-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- VLD.1535
- Package/Case:
- 2-SMD, Z-Bend
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Color:
- Red
- Configuration:
- Independent
- Lens Color:
- Colorless
- Lens Transparency:
- Clear
- Millicandela Rating:
- 5000mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 1.80mm Dia
- Voltage - Forward (Vf) (Typ):
- 2.2V
- Current - Test:
- 50mA
- Viewing Angle:
- 44°
- Mounting Type:
- Surface Mount, Bottom Entry
- Wavelength - Dominant:
- 630nm
- Wavelength - Peak:
- 639nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 2-SMD
- Size / Dimension:
- 2.30mm L x 2.30mm W
VLDS1535R-08 FAQ
1.How can I place an order for VLDS1535R-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VLDS1535R-08 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VLDS1535R-08 reliable?
The price and inventory of VLDS1535R-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VLDS1535R-08 is usually 5 days.
3.What payment methods are accepted for VLDS1535R-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VLDS1535R-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VLDS1535R-08?
VLDS1535R-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VLDS1535R-08 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VLDS1535R-08?
For technical support, including VLDS1535R-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VLDS1535R-08 requirements.
6.How does Aetrix verify that VLDS1535R-08 is sourced from the original manufacturer or authorized distributors?
All VLDS1535R-08 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VLDS1535R-08 meets industry standards.
7.What is the process for return or replacement of VLDS1535R-08?
All VLDS1535R-08 units undergo pre-shipment inspection (PSI). If there is an issue with VLDS1535R-08, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VLDS1535R-08 part is unused and in its original packaging.
Return procedure for VLDS1535R-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VLDS1535R-08 Tags
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LTST-C281KRKT
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150060GS75000
Würth Elektronik
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150060VS75000
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150060AS75000
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150060YS75000
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150060SS75000
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150060BS75000
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151031VS06000
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151033RS03000
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150080BS75000
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150080GS75000
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150141GS73100
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