LEDs - Circuit Board Indicators, Arrays, Light Bars, Bar Graphs

Part Number	Description / PDF	Quantity
SSF-LXH100MYD Lumex, Inc.	LED 5MM RA MATING YELLOW PC MNT	484
WP1503CB/SRD Kingbright	5MM ALGAAS RA.RED LED	0
XNK1LUG147DSMD SunLED	LED 3MM 1POS GREEN DIFF RA SMD	0
5505605F Dialight	LED 5MM RT ANG SUP CLR GRN PCMNT	175
5913001002HF Dialight	LED PRISM 3MM RED,GRN HYSOL SMD	0
KB2350EW Kingbright	LED LIGHT BAR 19.05X3.81MM RED	2273
5690112300F Dialight	LED CBI 3MM BI-LEVEL GRN,YLW	7
WP1503CB/GD Kingbright	5MM RA.GRN.LED	33588
5912404113F Dialight	LED PRISM 3MM RND LC SQ YLW SMD	0
5310F5 Visual Communications Company, LLC	LED GREEN T1 VERTICAL PCB	3827
5510403F Dialight	LED CBI 3MM HI EFF RED DIFF .250	321
5912101002F Dialight	LED PRISM 3MM RND ALGAAS RED SMD	15
SMA-B500YG G/W American Opto Plus LED Corp.	SMD 5 SEGMENT BARGRAPH	1201
6300T1 Visual Communications Company, LLC	LED SINGLE RED RIGHT ANGLE SMD	297
5505305F Dialight	LED 5MM RT ANG SUP DIFF YEL PCMT	822
5912404102F Dialight	LED PRISM 3MM RND LC SQ YLW SMD	0
WP934ZH/GD Kingbright	LED 3MM RA 565NM GRN GRN DIFF	13223
5511107F Dialight	LED 3MM LOW CURR RED	2213000
5501205F Dialight	LED 5MM RT ANG LOW CUR YEL PCMNT	0
5710133100F Dialight	LED CBI 2MM BI-LEVEL YW,YW DIFF	480

LEDs - Circuit Board Indicators, Arrays, Light Bars, Bar Graphs

1. Overview

Light Emitting Diodes (LEDs) are semiconductor devices that convert electrical energy into light through electroluminescence. This product category includes indicators, arrays, light bars, and bar graphs designed for circuit board integration. LEDs serve critical roles in modern electronics for status indication, data visualization, and illumination. Their advantages include low power consumption, long lifespan, and compact form factors.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Indicators	Single/dual-color point-source lighting for status indication	Power switches, network routers, medical device panels
Arrays	Matrix configurations for alphanumeric/symbol display	Seven-segment displays, dot matrix modules
Light Bars	Linear arrangements for directional lighting/brightness zones	Audio level meters, industrial control panels
Bar Graphs	Segmented columns for quantitative visual representation	Battery level indicators, sensor data visualization

3. Structure and Components

Typical LED components include:

Die: Gallium Nitride (GaN) or Indium Gallium Aluminum Phosphide (InGaAlP) semiconductor chips
Substrate: FR4 or metal-core PCB for thermal management
Encapsulation: Epoxy resin with diffused/optical lens structures
Driver Circuitry: Current-limiting resistors or PWM control ICs

4. Key Technical Specifications

Parameter	Description	Importance
Luminous Intensity	0.1-100 cd/m range	Determines visibility in various lighting conditions
Wavelength	400-700 nm (visible spectrum)	Defines color output accuracy
Forward Current	2-30 mA typical	Impacts brightness and longevity
Viewing Angle	5-120 depending on lens design	Dictates light distribution pattern
MTBF	50,000-100,000 hours	System reliability prediction

5. Application Fields

Key industries include:

Consumer Electronics: Smartphones, laptops, home appliances
Industrial Automation: PLC status indicators, HMI panels
Automotive: Dashboard lighting, warning indicators
Medical Equipment: Diagnostic status visualization

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Cree	XLamp XR	High-brightness automotive indicators
OSRAM	LED Line	Programmable RGB light bars
Nichia	NSPWR70CSS	Ultra-compact bar graph displays
Everlight	DLW-5xxx	Waterproof array modules

7. Selection Recommendations

Key considerations:

Environmental Conditions: Temperature (-40 to +85 C operational range)
Optical Requirements: Color consistency (CIE 1931 standard)
Electrical Compatibility: Driver circuit matching
Form Factor: 0402-5050 package size constraints
Cost Optimization: Trade-off between performance and budget

Industry Trend Analysis

Current trends show:

Micronization: Development of 0201 package formats
Smart Integration: Embedded ICs for addressable lighting
Energy Efficiency: Sub-1mA operational current devices
Automotive Growth: HUD and LiDAR indicator applications
Medical Advancements: UV/IR spectrum specialized indicators