LED Indication - Discrete

Part Number	Description / PDF	Quantity
C566D-AFF-CV34Q341 Cree	LED AMBER CLEAR 5MM OVAL T/H	0
TLCR5100 Vishay / Semiconductor - Opto Division	LED RED CLEAR 5MM T/H	2742
17-21SYGC/S530-E3/TR8 Everlight Electronics	LED GREEN-YELLOW CLEAR 0805 SMD	9750
NTE30101 NTE Electronics, Inc.	LED-YEL/YEL_GRN 3MM 3LEAD	1793
APTF1616LSEKJ3ZGKQBC Kingbright	LED RGB CLEAR 4SMD	0
BL-BGX3V4V-1 American Bright	5MM GREEN HIGH BRIGHTNESS W20000	18100
151053RS03000 Würth Elektronik Midcom	LED RED CLEAR 5MM ROUND T/H	764
C503B-ACN-CYBZA342-030 Cree	LED AMBER CLEAR 5MM ROUND T/H	0
APT2012SGC Kingbright	LED GREEN CLEAR CHIP SMD	185774
EAST16082WA0 Everlight Electronics	LED WHITE DIFFUSED 2SMD	0
5SYD Califia Lighting (Bivar)	LED YELLOW DIFFUSED T-1 3/4 T/H	36
VLMO2100-GS08 Vishay / Semiconductor - Opto Division	LED ORANGE CLEAR SMD MINILED SMD	0
SML-310PTT86 ROHM Semiconductor	LED GREEN CLEAR 0603 SMD	67012
CSB63CR2G2C ChromeLED	LED RED/GRN CLEAR 0603 CHIP SMD	20
R50BG2-F-0160 Califia Lighting (Bivar)	LED BLUE/GREEN CLEAR T/H	0
HLMP-6505-L001L Broadcom	LED GREEN CLEAR AXIAL T/H	0
B2972USNB05D000514U1930 Harvatek Corporation	1.6(L)X0.8(W)X0.5(H) MM RED/BLUE	0
XZM2MOK105S SunLED	LED ORANGE CLEAR 2SMD	0
SSL-LX2573PGD Lumex, Inc.	LED GREEN DIFF RECT 2MMX5MM T/H	7226
151053BS04500 Würth Elektronik Midcom	LED BLUE CLEAR 5MM ROUND T/H	2767

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