LED Indication - Discrete

Part Number	Description / PDF	Quantity
SSL-LX3054GD Lumex, Inc.	LED GREEN DIFFUSED T-1 T/H	2516
VLMTG41S2U1-GS18 Vishay / Semiconductor - Opto Division	LED GREEN 2PLCC SMD	0
VAOL-5GWY4 Visual Communications Company, LLC	LED WHITE CLEAR T/H	641
5972601817F Dialight	LED BLUE CLEAR 1616 SMD R/A	3620
LB QH9G-N1OO-35-1 OSRAM Opto Semiconductors, Inc.	LED BLUE DIFFUSED 0402 SMD	6049
NTE30088 NTE Electronics, Inc.	LED-SMD SOT-23 SUPER RED	2204
HLMPM501 Everlight Electronics	LED GREEN DIFFUSED 4MM T/H	0
5973211207F Dialight	LED ORANGE 2SMD	157
SML-D13UWT86C ROHM Semiconductor	LED RED 1608 SMD	162
NTE3015 NTE Electronics, Inc.	LED 5MM GREEN JEWEL	242
HLMP-1440 Broadcom	LED YELLOW CLEAR T-1 T/H	17234
5973311402NF Dialight	LED GREEN CLEAR 1206 SMD	2060
HLMP-WG02 Broadcom	LED RED DIFFUSED T-1 3/4 T/H	0
NTE30092 NTE Electronics, Inc.	LED-SMD SOT-23 YELL/GREEN	2023
XZFBB55W-1 SunLED	LED BLUE CLEAR 2SMD	0
MV5354A Everlight Electronics	LED YELLOW DIFFUSED T-1 3/4 T/H	0
SMLE13WBC8W1 ROHM Semiconductor	LED WHITE 0603 SMD	38332
SLR-56YY3F ROHM Semiconductor	LED YELLOW DIFFUSED T-1 3/4 T/H	13059
SLI-343U8R3F ROHM Semiconductor	LED RED DIFFUSED T-1 T/H	1874
APT2012LSECK/J4-PRV Kingbright	LED ORANGE CLEAR 2SMD	9826

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