LED Indication - Discrete

Part Number	Description / PDF	Quantity
VFHR1104LS-TR Stanley Electric	LED RED CLEAR SURFACE MOUNT	21
VLMK334BACB-GS08 Vishay / Semiconductor - Opto Division	LED AMBER 2PLCC SMD	6756
LTST-S220YKT Lite-On, Inc.	LED YELLOW CLEAR SMD R/A	5606
SSL-LX3044IC Lumex, Inc.	LED RED CLEAR T-1 T/H	51182
VLMO33R2U2-GS18 Vishay / Semiconductor - Opto Division	LED ORANGE 2PLCC SMD	0
C503B-GCN-CB0C0891 Cree	LED GREEN CLEAR 5MM ROUND T/H	650
HLMP-NL06 Broadcom	LED AMBER CLEAR T-1 T/H	6434
CMD11504UR Visual Communications Company, LLC	LED RED CLEAR SMD R/A	5759
TLHF42U1V2-35 Vishay / Semiconductor - Opto Division	LED ORANGE CLEAR 3MM T/H	0
HSMR-C170-R0000 Broadcom	CHIP LED BLUE TOP MT INGAN	15196
LY E65B-AACA-26-1-Z OSRAM Opto Semiconductors, Inc.	LED YELLOW CLEAR 4PLCC SMD	2178
HLMP-EL30-PS000 Broadcom	LED AMBER CLEAR T-1 3/4 T/H	0
VLMO233U1AA-GS08 Vishay / Semiconductor - Opto Division	LED ORANGE SMD MINILED SMD	99
HLMP-EL15-VY0DD Broadcom	LED AMBER CLEAR T-1 3/4 T/H	11543
150060VS75020 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	4032
HLMP-HG75-XY0DD Broadcom	LED RED DIFFUSED 5MM OVAL T/H	13692
5219284F Dialight	LED YELLOW DIFFUSED 5MM T/H	0
VLMR235T2V1-GS08 Vishay / Semiconductor - Opto Division	MINI SMD POWER LED RED	1990
VLMP23L2M2-GS08 Vishay / Semiconductor - Opto Division	LED GREEN CLEAR SMD MINILED SMD	2775
HSMH-C680 Broadcom	LED RED CLEAR CHIP SMD R/A	31175

LED Indication - Discrete

1. Overview

Discrete Light Emitting Diodes (LEDs) are single-chip optoelectronic devices that convert electrical energy into light through electroluminescence. This product category forms the foundation of modern indication systems, offering advantages including low power consumption, long lifespan, and high reliability. Their importance spans across consumer electronics, industrial equipment, automotive systems, and communication infrastructure.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Visible LEDs	Emits light in visible spectrum (400-700nm), available in multiple colors	Indicator lamps, display backlighting, decorative lighting
Infrared LEDs	Emits 700nm-1mm wavelength radiation, invisible to human eye	Remote controls, security sensors, night vision systems
High-Brightness LEDs	Enhanced luminous intensity (>1000mcd) with advanced packaging	Automotive lighting, outdoor displays, emergency signage
UV LEDs	Ultraviolet spectrum emission (280-400nm)	Sterilization equipment, counterfeit detection, curing systems

3. Structure and Composition

Typical discrete LED construction includes:

Die: Semiconductor chip (GaN/InGaN for blue/green, AlGaInP for red)
Encapsulation: Epoxy or silicone lens for light extraction and protection
Lead Frame: Copper or iron alloy for electrical connection and heat dissipation
Phosphor Coating: Used in white LEDs for wavelength conversion
Reflective Cup: Optimizes light directionality

4. Key Technical Parameters

Parameter	Significance	Typical Range
Wavelength	Determines light color and application suitability	375nm-940nm
Luminous Intensity	Measures brightness output (mcd)	50-10,000mcd
Forward Current	Operating current rating	20-150mA
Forward Voltage	Electrical potential drop	1.8-3.6V
Viewing Angle	Light emission spread measurement	5 -120

5. Application Fields

Primary application sectors include:

Consumer Electronics: Mobile phone indicators, keyboard backlighting
Automotive: Dashboard indicators, brake light systems
Industrial: Machine status indicators, safety signage
Medical: Diagnostic equipment indicators, phototherapy devices
Telecommunications: Network equipment status lights

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Cree Inc.	XLamp XP-G3	High brightness (3200mcd), 120 viewing angle
OSRAM Opto	OSTAR Projection	High-power LED for automotive lighting
Nichia Corp.	NSHU5991	UV LED (365nm) for curing applications
Everlight Electronics	LTST-C19HE8WT	Tri-color LED for RGB indication

7. Selection Recommendations

Key consideration factors:

Spectral Requirements: Match wavelength to application needs
Environmental Conditions: Temperature range (-40 C to +85 C typical)
Power Constraints: Select appropriate current/voltage ratings
Optical Design: Consider lens type and viewing angle
Reliability: Check MTTF (Mean Time to Failure) specifications

Industry Development Trends

Current technology directions include:

Miniaturization: Development of micro-LED ( LED) with dimensions <50 m
Efficiency Improvement: Targeting >300lm/W efficacy for visible LEDs
Smart Integration: Incorporating driver ICs and sensors in LED packages
Material Innovation: GaN-on-silicon substrates for cost reduction
Regulatory Compliance: RoHS/REACH compliant packaging materials