LED Indication - Discrete

Part Number	Description / PDF	Quantity
5972403502F Dialight	LED YELLOW CLEAR 0605 SMD R/A	0
150141GS73113 Würth Elektronik Midcom	WL-SMTW SMT MONO-COLOR TOP LED A	8307
C503B-RAN-CZ0C0AA2 Cree	LED RED CLEAR 5MM ROUND T/H	27170
MCL0606FRD1GR1T Venkel LTD	MULTI-COLOR LED 0606 FLAT LENS R	0
LTL2P3KRK Lite-On, Inc.	LED RED CLEAR T-1 3/4 T/H	3995
APHB1608LQBDCGKC Kingbright	LED BLUE/GREEN CLEAR 4SMD	0
EAST0603WA0 Everlight Electronics	LED WHITE DIFFUSED 2SMD	36216
SSL-LX5093HD Lumex, Inc.	LED RED DIFFUSED T-1 3/4 T/H	0
SLR-322VCT32 ROHM Semiconductor	LED RED CLEAR T-1 T/H	0
VLMK33Q2T1-GS18 Vishay / Semiconductor - Opto Division	LED AMBER 2PLCC SMD	0
HLMP-1503-D0002 Broadcom	LED GREEN DIFFUSED T-1 T/H	5379
SSL-LX100133SIC Lumex, Inc.	LED RED CLEAR T-10MM T/H	2613
150060BS75020 Würth Elektronik Midcom	WL-SMCW SMT MONO-COLOR CHIP LED	6040
SSL-LX5093BID Lumex, Inc.	LED RED DIFF T-1 3/4 BLINKNG T/H	4493
WP424SRDT Kingbright	LED RED DIFFUSED T-1 T/H	8700
HLMP-EL30-LP000 Broadcom	LED AMBER CLEAR T-1 3/4 T/H	0
XZDGK53W-8ST SunLED	LED GREEN CLEAR CHIP SMD	0
APTD3216SECK Kingbright	LED ORANGE CLEAR 2SMD	55113
150066M173000 Würth Elektronik Midcom	LED RGB CLEAR SMD	1671
SM0805UYC Califia Lighting (Bivar)	LED YELLOW CLEAR 0805 SMD	1420

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