LED Indication - Discrete

Part Number	Description / PDF	Quantity
LO T676-S1T1-24-Z OSRAM Opto Semiconductors, Inc.	LED ORANGE CLEAR 2PLCC SMD	1360
AAAF5051-05 Kingbright	LED RGB CLEAR 6SMD	4158
IN-S63AT5G Inolux	LED GREEN CLEAR 0603 SMD	0
IN-S124BRR Inolux	LED RED CLEAR 1204 SMD	581
19-113Z/T1D-CP2Q2HY/3T Everlight Electronics	LED WHITE DIFFUSED 2SMD	47186
APHD1608LZGCK Kingbright	LED GREEN CLEAR 1608 SMD	3630
ALMD-LL37-XZ002 Broadcom	LED AMBER DIFFUSED SMD	3880
HSMG-A100-H01J1 Broadcom	LED GREEN CLEAR 2PLCC SMD	216
150505GS73300 Würth Elektronik Midcom	WL-SMTW SMT MONO-COLOR TOP LED W	2000
NTE30156-10 NTE Electronics, Inc.	LED 5MM RGB COMMON CATH 10PCS	8
APTD1608SECK/J3-PF Kingbright	LED RED CLEAR 2SMD	123910
LTW-020ZDCG Lite-On, Inc.	LED WHITE 2PLCC SMD R/A	3852
IN-S124BRA Inolux	LED AMBER CLEAR 1204 SMD	0
XSUR36D SunLED	LED RED DIFFUSED RECT T/H	0
5975004402F Dialight	LED RED DIFFUSED 0603 SMD	0
NTE30014 NTE Electronics, Inc.	LED-T-1 RIGHT ANGLE RED	303
IN-S42BT5YG Inolux	TOP VIEW / 0402 / 1.0X0.5X0.4	5647
XLUG11D SunLED	LED GREEN DIFFUSED T-1 T/H	7862
L170B-QOC American Opto Plus LED Corp.	2.0X1.25X0.8 MM SMD LEDORANGE	200
WP937EGW Kingbright	LED GREEN/RED DIFFUSED T-1 T/H	67190

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