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Vishay Semiconductor Opto Division VLDK1535R-08
- Part No.:
- VLDK1535R-08
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- LED Indication - Discrete
- Package:
- 2-SMD, Z-Bend
- Datasheet:
-
VLDK1535R-08.pdf
- Description:
- LED AMBER CLEAR 2SMD BOTTOM ENT
- Quantity:
- Payment:
- Shipping:
Inventory:3,563
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Product details
Overview
VLDK1535R-08 from Vishay Semiconductors is an orange-red dome lens SMD LED using AlInGaP-on-Si chip technology, delivering 4500–14 000 mcd luminous intensity at 50 mA, with dominant wavelength 611–621 nm and ±22° viewing angle - deployed in high-visibility indicator and signage applications.
For engineers reviewing the VLDK1535R-08 datasheet, VLDK1535R-08 pinout, VLDK1535R-08 application, or VLDK1535R-08 equivalent, this page provides verified optical/electrical specs, gullwing/reverse gullwing terminal mapping, thermal derating curves, JEDEC level 2a reflow compliance, and binned luminous intensity groupings per reel.
Technical Context
This orange-red LED operates at 50 mA DC forward current (70 mA max at Tamb ≤ 60 °C), with forward voltage 1.9–2.25–2.7 V and reverse voltage rating of 5 V for short-term use only. Its AlInGaP-on-Si die achieves high luminous flux density and stable chromaticity across -40 to +100 °C ambient range.
Thermal resistance junction-to-ambient is 325 K/W on a >16 mm² PCB pad; luminous intensity ratio IVmax/IVmin ≤ 1.6 ensures tight binning consistency within each reel. ESD withstand voltage reaches 2 kV (JESD22-A114-B), and spectral bandwidth is 18 nm at 50% Irel max.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Luminous intensity | 4500–14 000 mcd @ 50 mA - enables high-contrast visibility in ambient lighting up to 10 000 lux |
| Dominant wavelength | 611–621 nm - precisely targets orange-red spectral band for traffic and safety signaling compliance |
| Forward voltage | 1.9–2.25–2.7 V @ 50 mA - supports low-voltage constant-current drivers without excessive power loss |
| Viewing angle | ±22° half-intensity - delivers focused beam for directional indication while minimizing stray light |
| Max DC forward current | 70 mA @ Tamb ≤ 60 °C - allows overdrive capability for pulsed brightness boost in multiplexed displays |
| Junction temperature | 125 °C - defines thermal ceiling for reliability modeling under sustained 50 mA operation |
| ESD withstand | 2 kV HBM (JESD22-A114-B) - permits handling without active grounding in standard assembly environments |
Pinout & Package
Package: SMD dome lens, 2.3 × 2.3 × 2.6 mm, available in gullwing (VLDK1535G-08) and reverse gullwing (VLDK1535R-08) configurations. Exposed copper thermal pad enhances heat dissipation. Cathode marked by notch or chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive DC supply connection | Accepts 1.9–2.25–2.7 V forward bias; requires current-limiting resistor or constant-current driver |
| Cathode | Ground return path | Marked via physical notch; connects to PCB ground plane for thermal and electrical reference |
Key Features
| Feature | Design Value |
|---|---|
| AlInGaP-on-Si chip technology | Enables high luminous intensity and stable color point across industrial temperature range (-40 to +100 °C) |
| Luminous intensity binning | IVmax/IVmin ≤ 1.6 per reel ensures consistent brightness matching in multi-LED arrays |
| JEDEC level 2a preconditioning | Validates moisture sensitivity and reflow robustness for automated SMT assembly without baking |
| Gullwing/reverse gullwing options | Supports both standard and inverted board layouts - eliminates need for custom footprint redesign |
| Reflow soldering compatibility | Rated for peak 260 °C per J-STD-020 - compatible with lead-free assembly lines without thermal damage |
Applications
| Traffic Signal Modules | Industrial Control Panels |
|---|---|
Use Scenario: Red/orange-red status indicators in outdoor traffic signal heads exposed to UV, rain, and wide thermal cycling. IC Role / Device Role / Timing Role: Visual status emitter - no timing or logic function; driven by constant-current source synchronized to controller PWM. Use Value: 611–621 nm dominant wavelength meets ITE/EN 12367 chromaticity requirements for red-orange traffic signals; ±22° beam controls optical crosstalk between adjacent lamps. |
Use Scenario: Operator-facing status lights on factory HMIs, PLC enclosures, and safety interlock panels. IC Role / Device Role / Timing Role: Human-readable state indicator - electrically isolated via optocoupler-driven current source; no data interface. Use Value: 4500–14 000 mcd output ensures legibility under 5000 lux factory lighting; 125 °C junction rating sustains reliability near heat-generating drives. |
| Automotive Interior Switches | Public Information Displays |
Use Scenario: Backlit tactile switches and bezel indicators in automotive cabin modules operating from -40 to +85 °C. IC Role / Device Role / Timing Role: Illumination source - directly driven by MCU GPIO with external current limiting; no internal regulation. Use Value: 2.3 × 2.3 mm footprint fits tight switch PCB real estate; 2 kV ESD rating prevents failure during manual assembly or service. |
Use Scenario: Dot-matrix or segmented backlighting in transit information kiosks, ticket vending machines, and wayfinding signage. IC Role / Device Role / Timing Role: Pixel-level luminance element - multiplexed at ≤1 kHz to reduce average power and thermal load. Use Value: Tight IV binning (≤1.6 ratio) eliminates visible brightness variation across display segments; 325 K/W RthJA enables passive thermal management on FR4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar orange-red LED applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VLDK1535G-08 | Gullwing package (vs. reverse gullwing); identical optical/electrical specs and binning | Requires PCB footprint rotation; same luminous intensity and wavelength range | Select when board layout uses standard gullwing orientation and thermal pad alignment matches |
| VLDR1535R-08 | Red emission (619–631 nm), higher luminous intensity (3550–11 200 mcd), same package and drive conditions | Better suited for pure red signaling where CIE chromaticity coordinates require stricter red purity | Choose for applications requiring deeper red hue and higher minimum intensity; verify color space compliance |
Compared with VLDK1535R-08, VLDK1535G-08 offers identical photometric performance but requires mechanical reorientation on PCB, whereas VLDR1535R-08 shifts chromaticity toward longer wavelengths and increases minimum intensity by ~20%, making it preferable for red-dominant regulatory zones.
Availability
VLDK1535R-08 is available at Aetrix Electronics and suitable for traffic signal modules, industrial control panels, automotive interior switches, and public information displays requiring stable component supply, consistent binned luminosity, and JEDEC-compliant reflow processing.
Supply support for VLDK1535R-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 industrial-grade environmental tolerance.
The VLDK1535R-08 belongs to Vishay's power SMD LED product series, engineered for high-brightness, long-life visual indication in demanding outdoor and industrial environments.
FAQ
What is the maximum continuous forward current for VLDK1535R-08?
The VLDK1535R-08 supports 70 mA DC forward current only when ambient temperature remains at or below 60 °C. At higher temperatures, derating is required per Figure 1 in the datasheet; at 100 °C ambient, maximum permissible current drops to approximately 35 mA to maintain 125 °C junction temperature. Always reference the absolute maximum ratings table and thermal derating curve for VLDK1535R-08 before final design validation.
Does VLDK1535R-08 have a built-in current regulator or driver circuit?
No, the VLDK1535R-08 is a passive two-terminal LED device with no integrated driver, regulator, or control logic. It requires an external constant-current source or appropriately sized series resistor to limit forward current to 50 mA (typical operating point) or up to 70 mA (derated). The VLDK1535R-08 datasheet specifies VF = 1.9–2.25–2.7 V at 50 mA, confirming its reliance on external biasing.
How is luminous intensity binned for VLDK1535R-08, and what does "FA" group mean?
VLDK1535R-08 is binned into luminous intensity groups per the FA classification (11 200–14 000 mcd at 50 mA), ensuring IVmax/IVmin ≤ 1.6 within each reel. Group FA corresponds to the highest intensity tier in the orange-red family. Each reel ships with only one intensity group and one wavelength group - mixing is prohibited to guarantee uniformity in production assemblies using VLDK1535R-08.
Can VLDK1535R-08 be used in reverse-bias configuration?
The VLDK1535R-08 is rated for 5 V reverse voltage only for short-term applications, as explicitly noted in the datasheet. Continuous or repeated reverse bias risks permanent degradation of the AlInGaP-on-Si junction. It must not be used as a bidirectional indicator or in AC-driven circuits without series protection diodes. Reverse conduction is not a functional feature of VLDK1535R-08.
What is the thermal resistance junction-to-ambient for VLDK1535R-08, and how is it measured?
The thermal resistance junction-to-ambient (RthJA) for VLDK1535R-08 is 325 K/W, measured with the device mounted on a PCB having a copper pad area exceeding 16 mm². This value assumes standard FR4 substrate and natural convection cooling - no heatsink or forced airflow. Designers must apply this RthJA with Tamb and power dissipation (VF × IF) to calculate actual Tj and ensure it stays ≤125 °C for VLDK1535R-08 reliability.
VLDK1535R-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:
- Amber
- Configuration:
- Independent
- Lens Color:
- Colorless
- Lens Transparency:
- Clear
- Millicandela Rating:
- 8000mcd
- Lens Style:
- Round with Domed Top
- Lens Size:
- 1.80mm Dia
- Voltage - Forward (Vf) (Typ):
- 2.25V
- Current - Test:
- 50mA
- Viewing Angle:
- 44°
- Mounting Type:
- Surface Mount, Bottom Entry
- Wavelength - Dominant:
- 616nm
- Wavelength - Peak:
- 622nm
- Features:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 2-SMD
- Size / Dimension:
- 2.30mm L x 2.30mm W
VLDK1535R-08 FAQ
1.How can I place an order for VLDK1535R-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VLDK1535R-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 VLDK1535R-08 reliable?
The price and inventory of VLDK1535R-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VLDK1535R-08 is usually 5 days.
3.What payment methods are accepted for VLDK1535R-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VLDK1535R-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VLDK1535R-08?
VLDK1535R-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VLDK1535R-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 VLDK1535R-08?
For technical support, including VLDK1535R-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VLDK1535R-08 requirements.
6.How does Aetrix verify that VLDK1535R-08 is sourced from the original manufacturer or authorized distributors?
All VLDK1535R-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 VLDK1535R-08 meets industry standards.
7.What is the process for return or replacement of VLDK1535R-08?
All VLDK1535R-08 units undergo pre-shipment inspection (PSI). If there is an issue with VLDK1535R-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 VLDK1535R-08 part is unused and in its original packaging.
Return procedure for VLDK1535R-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VLDK1535R-08 Tags
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LTST-C281KRKT
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150060GS75000
Würth Elektronik
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150060VS75000
Würth Elektronik
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150060AS75000
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150060YS75000
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150060SS75000
Würth Elektronik
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150060BS75000
Würth Elektronik
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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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