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Home > Products > Optoelectronics > LED Indication - Discrete

Vishay Semiconductor Opto Division VLDR1235R

Name: VLDR1235R
Brand: Vishay Semiconductor Opto Division
SKU: VLDR1235R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VLDR1235R

Manufacturer:: Vishay Semiconductor Opto Division

Category:: LED Indication - Discrete

Package:: 2-SMD, Z-Bend

Datasheet:: VLDR1235R.pdf

Description:: LED RED CLEAR 2SMD BOTTOM ENT

Quantity:: RFQ Add To RFQ list

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Inventory:2,579

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Product details

Overview

VLDR1235R from Vishay Semiconductors is a red dome-lens surface-mount LED using AlInGaP-on-Si chip technology, delivering 9000–35500 mcd luminous intensity at 50 mA, with dominant wavelength 619–631 nm and ±11° viewing angle - deployed in traffic signal indicators and high-visibility signage.

For engineers reviewing the VLDR1235R datasheet, VLDR1235R pinout, VLDR1235R application, or VLDR1235R equivalent, this page provides verified optical, electrical, thermal, and packaging data - including gullwing/reverse-gullwing terminal configuration, JEDEC level 2a preconditioning compliance, and reflow-soldering compatibility per J-STD-020.

Technical Context

The VLDR1235R operates as a discrete visible-light emitter with DC forward current capability up to 70 mA at ≤60 °C ambient, junction temperature limited to 125 °C, and thermal resistance of 325 K/W when mounted on a PCB pad >16 mm². Its AlInGaP-on-Si die enables high luminous flux and stable color output across industrial temperature range (−40 to +100 °C).

It features untinted clear molded dome lens for directional light emission, ±11° half-intensity angle, and ESD withstand voltage up to 2 kV (JESD22-A114-B). The device is offered in both gullwing and reverse gullwing SMD configurations, with identical optical and electrical specs but distinct mechanical pin orientation.

Key Specifications

Parameter	Value and Actual Design Meaning
Luminous intensity	9000–35500 mcd at 50 mA - enables high-brightness indicator use without external optics or current boosting.
Dominant wavelength	619–631 nm - standardized red chromaticity compliant with traffic signal and safety signage spectral requirements.
Forward voltage	1.9–2.7 V at 50 mA - compatible with standard 3.3 V and 5 V logic-supply rails using simple series resistor drive.
Viewing angle	±11° half-intensity - narrow beam for focused illumination and reduced optical crosstalk in dense LED arrays.
Absolute max current	70 mA DC - supports pulse-driven or continuous operation in industrial-grade lighting control circuits.
Junction temp limit	125 °C - defines maximum allowable thermal stress during sustained operation under ambient up to +100 °C.
ESD rating	2 kV HBM (JESD22-A114-B) - ensures robustness during automated SMT handling and board assembly.

Pinout & Package

VLDR1235R uses a reverse gullwing SMD package (2.3 × 2.3 × 2.8 mm), with cathode and anode terminals formed by bent leads extending from opposite sides of the molded dome body. The package is untinted and clear, optimized for directional light extraction.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Positive DC supply connection	Accepts forward bias up to 70 mA; requires current-limiting resistor or constant-current driver in series.
Cathode	Ground or return path	Connected to system ground or low-side switch; polarity reversal permitted only for short-term applications (VR ≤ 5 V).

Key Features

Feature	Design Value
AlInGaP-on-Si chip technology	Delivers high luminous intensity and stable red chromaticity over temperature and lifetime.
Reverse gullwing SMD form factor	Enables high-density placement and mechanical stability on PCBs while maintaining optical axis alignment.
Luminous intensity binning (IVmax/IVmin ≤ 1.6)	Ensures consistent brightness across units within same reel - critical for uniform panel illumination.
JEDEC level 2a preconditioning	Guarantees moisture sensitivity compliance for lead-free reflow soldering without baking pre-assembly.
Clear dome lens with ±11° viewing angle	Provides focused beam pattern ideal for directional signaling and reduces need for secondary optics.

Applications

Traffic Signal Modules	Industrial Status Panels
Use Scenario: Red LED array in vehicular traffic light heads operating outdoors under wide ambient temperature (−40 to +85 °C) and UV exposure. IC Role / Device Role / Timing Role: Discrete red light source providing regulatory-compliant stop indication with high visibility at distance. Use Value: 35500 mcd max intensity and 619–631 nm dominant wavelength meet ITE/EN 12367 spectral and luminance requirements.	Use Scenario: High-reliability status indicator on factory automation HMIs exposed to dust, vibration, and intermittent power cycling. IC Role / Device Role / Timing Role: Visual feedback element confirming PLC I/O state changes in real time. Use Value: 70 mA DC rating and −40 to +100 °C operating range ensure uninterrupted operation in harsh industrial environments.
Emergency Exit Signage	Medical Device Indicators
Use Scenario: Self-luminous exit sign with battery-backed LED array requiring long-life, low-power, high-contrast red illumination. IC Role / Device Role / Timing Role: Primary red emission component in fail-safe evacuation guidance systems. Use Value: 125 °C junction limit and 325 K/W RthJA support thermally constrained enclosures without active cooling.	Use Scenario: Front-panel alarm indicator on diagnostic equipment where color accuracy and ESD immunity are critical. IC Role / Device Role / Timing Role: Human-readable alert emitter synchronized with fault detection logic. Use Value: 2 kV HBM ESD rating prevents false triggers during handling; tight luminous intensity binning ensures consistent visual hierarchy across multi-LED interfaces.

Traffic Signal Modules

Industrial Status Panels

Use Scenario: Red LED array in vehicular traffic light heads operating outdoors under wide ambient temperature (−40 to +85 °C) and UV exposure.

IC Role / Device Role / Timing Role: Discrete red light source providing regulatory-compliant stop indication with high visibility at distance.

Use Value: 35500 mcd max intensity and 619–631 nm dominant wavelength meet ITE/EN 12367 spectral and luminance requirements.

Use Scenario: High-reliability status indicator on factory automation HMIs exposed to dust, vibration, and intermittent power cycling.

IC Role / Device Role / Timing Role: Visual feedback element confirming PLC I/O state changes in real time.

Use Value: 70 mA DC rating and −40 to +100 °C operating range ensure uninterrupted operation in harsh industrial environments.

Emergency Exit Signage

Medical Device Indicators

Use Scenario: Self-luminous exit sign with battery-backed LED array requiring long-life, low-power, high-contrast red illumination.

IC Role / Device Role / Timing Role: Primary red emission component in fail-safe evacuation guidance systems.

Use Value: 125 °C junction limit and 325 K/W RthJA support thermally constrained enclosures without active cooling.

Use Scenario: Front-panel alarm indicator on diagnostic equipment where color accuracy and ESD immunity are critical.

IC Role / Device Role / Timing Role: Human-readable alert emitter synchronized with fault detection logic.

Use Value: 2 kV HBM ESD rating prevents false triggers during handling; tight luminous intensity binning ensures consistent visual hierarchy across multi-LED interfaces.

Equivalent & Alternatives

The following parts are listed as comparable options for similar red LED applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
VLDR1235G	Same package and electrical specs, but green-color variant (525 nm dominant wavelength); luminous intensity 9000–35500 mcd at 50 mA.	Used where green status indication (e.g., "ready", "OK") is required instead of red ("alarm", "stop").	Select VLDR1235G only when green chromaticity and matching optical performance are needed - not a drop-in color substitute.
VLDS1235R	Super-red variant (626–637 nm), lower luminous intensity (5600–22400 mcd), identical package and VF range.	Suitable for applications requiring deeper red hue and lower brightness, such as aesthetic backlighting or non-regulatory signage.	Choose VLDS1235R when spectral purity at longer wavelengths outweighs peak intensity needs - not interchangeable for traffic signal compliance.

Compared with VLDR1235R, VLDR1235G offers identical mechanical and thermal behavior but shifts chromaticity to green, while VLDS1235R trades intensity and wavelength for super-red spectral positioning - neither is pin-compatible nor functionally substitutable without optical and regulatory validation.

Availability

VLDR1235R is available at Aetrix Electronics and suitable for traffic signaling, industrial status panels, emergency exit signage, and medical device indicators requiring stable component supply, consistent luminous intensity binning, and JEDEC level 2a moisture sensitivity compliance.

Supply support for VLDR1235R 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, optoelectronics, and passive components with emphasis on reliability, precision, and industrial-grade performance.

The VLDR1235R belongs to Vishay's VLD.1235 dome-lens SMD LED product line, engineered for high-brightness, narrow-beam visible-light indication in transportation, industrial, and safety-critical applications.

FAQ

What is the maximum DC forward current rating for VLDR1235R?

The VLDR1235R has a maximum DC forward current rating of 70 mA at ambient temperatures ≤60 °C. Exceeding this value risks accelerated lumen depreciation and thermal runaway. Derating is required above 60 °C per Figure 1 in the datasheet, where permissible current drops to ~50 mA at 85 °C ambient. Always verify thermal design with the 325 K/W junction-to-ambient resistance value.

Does VLDR1235R support lead-free reflow soldering?

Yes, VLDR1235R is qualified for lead-free reflow soldering per J-STD-020, with a peak temperature of 245 °C (max 260 °C for ≤10 s). It meets JEDEC level 2a preconditioning requirements and ships in dry-packed reels with EIA JESD22-A112 level 2a labeling. No baking is required if used within 672 hours of opening the sealed bag under <30 °C/60 % RH conditions.

What is the viewing angle specification for VLDR1235R?

The VLDR1235R has an angle of half intensity of ±11°, measured at 50 mA forward current. This narrow beam angle results from its clear dome lens geometry and is confirmed in Figure 2 of the datasheet. It enables precise light directionality - useful in applications like segmented displays or collimated signaling where optical crosstalk must be minimized.

How is luminous intensity binned for VLDR1235R?

VLDR1235R is binned by luminous intensity per packing unit, with IVmax/IVmin ≤ 1.6. Binning follows the HA group (28000–35500 mcd) and GA group (18000–22400 mcd) per the datasheet's luminous intensity classification table. Each reel contains only one brightness group - no mixing - ensuring uniform appearance in multi-LED assemblies without post-production sorting.

Can VLDR1235R be operated in reverse bias?

VLDR1235R permits reverse voltage up to 5 V, but only for short-term applications as noted in the datasheet. Continuous reverse bias degrades the AlInGaP die and may cause irreversible damage. Reverse conduction is not intended for functional operation - the device is strictly a unidirectional emitter. Use appropriate polarity protection in circuit design.

VLDR1235R Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Semiconductor Opto Division

Series:: VLD.1235

Package/Case:: 2-SMD, Z-Bend

Packaging:: Tape & Reel (TR)

Product Status:: Active

Color:: Red

Configuration:: Standard

Lens Color:: Colorless

Lens Transparency:: Clear

Millicandela Rating:: 14500mcd

Lens Style:: Round with Domed Top

Lens Size:: 1.80mm Dia

Voltage - Forward (Vf) (Typ):: 2.2V

Current - Test:: 50mA

Viewing Angle:: 11°

Mounting Type:: Surface Mount, Bottom Entry

Wavelength - Dominant:: 624nm

Wavelength - Peak:: 632nm

Features:: -

Grade:: -

Qualification:: -

Supplier Device Package:: 2-SMD

Size / Dimension:: 2.30mm L x 2.30mm W

VLDR1235R FAQ

1.How can I place an order for VLDR1235R through Aetrix?

Please submit a Request for Quotation (RFQ) for VLDR1235R 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 VLDR1235R reliable?

The price and inventory of VLDR1235R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VLDR1235R is usually 5 days.

3.What payment methods are accepted for VLDR1235R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VLDR1235R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VLDR1235R?

VLDR1235R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VLDR1235R 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 VLDR1235R?

For technical support, including VLDR1235R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VLDR1235R requirements.

6.How does Aetrix verify that VLDR1235R is sourced from the original manufacturer or authorized distributors?

All VLDR1235R 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 VLDR1235R meets industry standards.

7.What is the process for return or replacement of VLDR1235R?

All VLDR1235R units undergo pre-shipment inspection (PSI). If there is an issue with VLDR1235R, 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 VLDR1235R part is unused and in its original packaging.

Return procedure for VLDR1235R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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