LED Indication - Discrete

Part Number	Description / PDF	Quantity
LO P476-R2T1-24-F-Z OSRAM Opto Semiconductors, Inc.	LED POINTLED 606NM ORANGE SMD	0
APTD1608SURCK Kingbright	LED RED CLEAR CHIP SMD	293622
TLHP4201 Vishay / Semiconductor - Opto Division	LED GREEN CLEAR 3MM T/H	4974
HSMC-C191-T0000 Broadcom	CHIP LED RED TOP MT ALINGAP	17739
L170B-RC American Opto Plus LED Corp.	2.0X1.25X0.8 MM SMD LEDRED	100
HLMP-1790-A0002 Broadcom	LED GREEN DIFFUSED T-1 T/H	597
VFHA1104P-4C42C-TR Stanley Electric	LED ORANGE CLEAR 1608 SMD	2421
HSMA-C120 Broadcom	LED AMBER CLEAR CHIP SMD R/A	34697
5973202507F Dialight	LED ORANGE CLEAR 1208 SMD	1556
APD3224SECK-F01 Kingbright	LED ORANGE CLEAR SMD	96064
VLMK2300-GS08 Vishay / Semiconductor - Opto Division	LED RED CLEAR SMD MINILED SMD	1325
B2102USNG20C000133U1930 Harvatek Corporation	3.2(L)X1.5(W)X1.0(H) MM RED/GREE	0
VLMG21J2M1-GS08 Vishay / Semiconductor - Opto Division	LED GREEN CLEAR SMD MINILED SMD	2773
LA L296-Q2R2-1-0-20-R18-Z OSRAM Opto Semiconductors, Inc.	LED AMBER DIFFUSED 0603 SMD	4956
150202M153130 Würth Elektronik Midcom	WL-SFTD SMT FULL-COLOR TOP LED D	6167
XZDGK55W-A2RT SunLED	LED GREEN CLEAR 2SMD	6064
XZVG55W-2 SunLED	LED GRN CLEAR 2SMD BOTTOM ENTRY	2213
SML-H12Y8TT86 ROHM Semiconductor	LED YELLOW CLEAR 0805 SMD	0
5988A60107F Dialight	SM LED 0402 YELGRN 572NM	10214
5975412407F Dialight	LED YLW/GREEN DIFFUSED 0603 SMD	3746

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