Overview
The LTST-C150YKT is a surface-mount device (SMD) LED designed for high-density PCB applications. Manufactured by Lite-On Technology, it emits yellow light at 590nm and is widely adopted due to its energy efficiency and compact 1608 package size (1.6mm × 0.8mm). Its reliability makes it suitable for harsh environments, including automotive dashboards and industrial control panels. The LED complies with RoHS directives, ensuring minimal environmental impact.
Structure and Working Principle
The LED consists of an InGaN/GaN semiconductor chip mounted on a lead frame, encapsulated in an epoxy resin lens. When forward voltage (typically 2.0–2.5V) is applied, electron-hole recombination generates photons at 590nm. The 1608 package features a molded reflector for optimized light distribution. Gold wire bonding ensures stable electrical connections, while the resin lens provides mechanical protection and color stability.
Key Features
With a luminous intensity of 20–40 mcd at 20mA, the LTST-C150YKT offers high visibility even in daylight. Its low power consumption (40–60mW) reduces heat generation, extending lifespan to approximately 100,000 hours. The component operates across a -40°C to +85°C temperature range, making it suitable for outdoor and automotive use. Its Pb-free construction aligns with global environmental standards.
Application Areas
Primary applications include status indicators in networking equipment, backlighting for LCD panels, and dashboard illumination in vehicles. Consumer electronics like smart home devices and wearables also leverage its compact size. Industrial uses encompass control panel indicators, machinery status lights, and emergency signage. The LED’s moisture resistance (JEDEC Level 2A) suits humid environments.
Maintenance and Precautions
Avoid exposing the LED to voltages exceeding 3V or currents above 30mA to prevent burnout. Use reflow soldering profiles per JEDEC J-STD-020 (peak temperature 260°C for 10 seconds max). Storage should be in dry, anti-static packaging at <40°C/60% RH. Mechanical stress during handling may damage the resin lens or wire bonds.
B2B Procurement Guide
Bulk purchases (reels of 3,000–4,000 units) commonly reduce per-unit costs by 15–30%. Verify supplier certifications (ISO 9001, IATF 16949 for automotive grade) and request batch-specific luminance test reports. Alternate part numbers include Everlight’s 19-217/Y2C-CQ2R2B/3T or Samsung’s LM-YN68-RTV1. Lead times vary from 2–8 weeks depending on market demand.
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