Lite-On Inc. LTST-C194KSKT

LTST-C194KSKT Lite-On Yellow SMD LED Product Summary

The LTST-C194KSKT from Lite-On Inc. is a yellow surface-mount device (SMD) LED built for discrete indication purposes. Leveraging advanced aluminum indium gallium phosphide (AlInGaP) chip technology, the LTST-C194KSKT provides a robust and efficient solution for applications that demand compact design and high luminous intensity. Compliant with the 0603 (1608 metric) SMD package, LTST-C194KSKT is suitable for integration across a variety of modern electronic assemblies, spanning consumer electronics, industrial controls, and communications equipment.

Main Attributes of LTST-C194KSKT Lite-On Yellow SMD LED

Designed to support the requirements of automated, high-density electronic assembly, the LTST-C194KSKT Lite-On Yellow SMD LED offers several critical features for design engineers and procurement teams:

RoHS compliant, classified as a green product, enabling integration into environmentally conscious or export-focused projects.

Ultra-thin profile of 0.30 mm height, facilitating use in low-profile or miniature assemblies.

Utilizes high-brightness AlInGaP chip technology for optimal yellow light output at a dominant wavelength of 592 nm.

Packaged in industry-standard 8mm tape, on 7" diameter reels, aligning with automated pick-and-place equipment.

Fully compatible with standard IR reflow and vapor phase soldering processes, minimizing process development time.

EIA standard 0603 footprint ensures drop-in compatibility for conventional PCB layouts.

Maximum Limits and Safe Usage Parameters for LTST-C194KSKT Lite-On Yellow SMD LED

Before integrating the LTST-C194KSKT, engineers must consider its maximum ratings to ensure device safety and reliability:

Forward Voltage: Maximum of 2.4V at 20mA, with typical operating at 2.0V.

Forward Current: Up to 30mA continuous; derating is necessary at higher ambient temperatures.

Reverse Voltage: Not recommended for operation; LEDs are sensitive to reverse bias.

Power Dissipation and Thermal Management: Maintain appropriate airflow or heat sinking, though the low power rating simplifies this in most portable or embedded applications.

ESD Handling: The device must be handled in a static-safe environment, as AlInGaP-based LEDs can be sensitive to surges and static discharge.

Optical and Electrical Specifications of LTST-C194KSKT Lite-On Yellow SMD LED

For engineering optimization, the LTST-C194KSKT provides:

Luminous Intensity: Sorted in bins with a typical central value around 70 mcd (at 20mA), supporting both visual and sensor-based indication.

Wavelength: Dominant wavelength tightly controlled at 592nm, with a narrow binning tolerance (±1nm), ensuring color uniformity.

Forward-Current Response: Provides a linear light output response up to the rated current, aiding in predictable brightness scaling.

Angular Emission Pattern: Details provided in the spatial distribution curve, facilitating precise optical modeling.

Intensity and color bin data support applications where multiple indicators must match in appearance across a front panel or user interface.

Packaging, Handling, and Mounting Instructions for LTST-C194KSKT Lite-On Yellow SMD LED

Adherence to recommended storage, handling, and assembly procedures maximizes yields and minimizes failures:

Tape-and-reel packaging: Supplied on 7-inch reels (approx. 5000 pcs/reel), with pocket integrity and ANSI/EIA-481 compliant tape structure for reliable automated processing.

Solder Pad Dimensions: 0603 SMD standard with a recommended stencil thickness of 0.10mm for optimal solder deposition.

Storage: Maximum 30°C, 70% RH; desiccant protection or nitrogen storage recommended for extended shelf life. LEDs that have exited dry packs for more than 672 hours should be baked at 60°C for at least 24 hours pre-assembly.

Cleaning: Use isopropyl or ethyl alcohol only, avoiding harsh chemicals that could affect lens or encapsulant integrity.

Handling: Use antistatic gloves, wrist straps, and ESD-safe workstations as defined in the ESD guidelines. Regular audits and proper personnel training ensure continued compliance.

Integration Tips and Soldering Methods for LTST-C194KSKT Lite-On Yellow SMD LED

For best performance, follow these integration guidelines:

Compatible with IR and vapor-phase reflow soldering processes as per Lite-On recommendations. Adhere strictly to suggested temperature profiles to preserve LED performance.

Drive Method: Each LTST-C194KSKT LED should have its dedicated current-limiting resistor—required to achieve consistent brightness, especially in parallel configurations.

Circuit Model: "Model A" with independent series resistors per LED is strongly recommended over shared current-source designs.

Post-assembly cleaning, if necessary, should use only specified alcohols, and immersion times should be minimized (<1 minute) to prevent encapsulant degradation.

Reliability Considerations and Application Guidelines for LTST-C194KSKT Lite-On Yellow SMD LED

Design teams should align with the intended reliability profile and applications for the LTST-C194KSKT:

Recommended primarily for standard consumer and industrial electronic applications such as status indication in office, communication, and household equipment.

Not suitable for applications where LED failure would pose risks to life or health (aviation, life support, traffic systems, etc.) without additional qualification and consultation.

Routine ESD checklists, proper device packaging, and comprehensive static-safe facility management are required for optimal operational life.

Reliability testing available per Lite-On standards; engineers should consult the manufacturer for detailed testing protocols when high reliability is mandated.

Alternative or Substitute Options for LTST-C194KSKT Lite-On Yellow SMD LED

When evaluating alternative supply options, consider these common strategies:

Cross reference to other leading SMD yellow 0603 LEDs using AlInGaP technology with a nominal 592nm wavelength to ensure optical consistency.

Key parameters for equivalency: package size (0603/1608 metric), luminous intensity range (nominal 70 mcd at 20mA), forward voltage specification, RoHS compliance, and compatibility with pick-and-place processes.

For qualification of a replacement, review manufacturer datasheets for binning, soldering profiles, and ESD tolerances; these factors are crucial for seamless drop-in replacement in automated lines.

Industry standards (such as J-STD-020 for reflow soldering) should also guide equivalent selection.

Conclusion

The LTST-C194KSKT Lite-On Yellow SMD LED stands out for its compact size, high-brightness yellow emission, and robust compatibility with automated assembly and RoHS requirements. It is particularly well-suited for mainstream electronic indicators where optical consistency, process reliability, and integration ease drive component selection. By closely adhering to Lite-On’s handling and integration guidelines, and by comparing key optical and electrical performance metrics with industry equivalents, engineers and procurement professionals can confidently specify or approve the LTST-C194KSKT for new and existing designs.