LED Indication - Discrete

Part Number	Description / PDF	Quantity
LO R976-PS-1 OSRAM Opto Semiconductors, Inc.	LED ORANGE DIFFUSED 0805 SMD	5467
QTLP650D4TR Everlight Electronics	LED GREEN DIFFUSED 1206 SMD	27127
VLME31S1T1-GS08 Vishay / Semiconductor - Opto Division	LED YELLOW CLEAR 2PLCC SMD	9097
XZM2CYK56W SunLED	LED YELLOW CLEAR 2SMD R/A	1370
CL50W4C ChromeLED	LED WHITE CLEAR T-1 3/4 T/H	1000
C5SMF-BJE-CT34Q3T2 Cree	LED BLUE 5MM OVAL T/H	0
HLMP-EG2G-XZ0DD Broadcom	LED RED CLEAR T-1 3/4 T/H	5005
HLMA-KH00-J0000 Broadcom	LED RED CLEAR T-1 T/H	20324
APT3216QBC/D Kingbright	LED BLUE CLEAR CHIP SMD	11483
CSM28G2CG ChromeLED	LED GREEN CLEAR GULL WING SMD	62
VLMW1300-GS08 Vishay / Semiconductor - Opto Division	LED COOL WHITE 0603 SMD	42332
LY M67K-J1K2-26-Z OSRAM Opto Semiconductors, Inc.	LED YELLOW CLEAR SMD	1656
HSMM-C110 Broadcom	LED GREEN CLEAR CHIP SMD R/A	8890
XZDGKMDK116W10MA-1 SunLED	3.2X1.25MM BI-COLOR G/R CHIP LED	4000
MCL1204RRD1GR1T Venkel LTD	MULTI-COLOR LED 1204 R/A LENS RE	9000
SSL-LX3044ID-12V Lumex, Inc.	LED RED DIFFUSED T-1 T/H	22426
LTL-4238 Lite-On, Inc.	LED GREEN CLEAR T-1 3/4 T/H	23585
5973008207F Dialight	LED RED CLEAR 2PLCC SMD	1601
150080AS75000 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	2396
SSL-LX5093SID Lumex, Inc.	LED RED DIFFUSED T-1 3/4 T/H	12142

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