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

Part Number	Description / PDF	Quantity
5602F1-5V Visual Communications Company, LLC	LED RED T1 RIGHT ANGLE 5V PCB	1551
MV64539MP7 Everlight Electronics	LED SS GREEN DIFFUSED LP PCB 5MM	13500
5913101002SF Dialight	LED PRISM 3MM YLW,GRN SILIC SMD	0
XGUYX10D SunLED	BARGRAPH 10-SEGMENT YLW	377
5912401007F Dialight	LED PRISM 3MM RND YELLOW SMD	400
5514007F Dialight	LED 3MM R/A BLUE	0
XEMRA100M SunLED	LIGHTBAR 8.89X3.81MM RD WHT DIFF	0
5952101002SF Dialight	LED PRISM 2MM SQ RED 660NM SMD	0
5922320313F Dialight	LED CBI PRISM BLVL GN/RED TR SIL	466
XPZ3LUGR37M SunLED	3MM BI-COLOR RED/GRN THREE POSIT	25
5640200133F Dialight	LED CBI 3MM 3X1 RED/YLW/YLW	0
XEMG21D SunLED	LIGHTBAR 3.67X6.15MM GREEN DIFF	0
5500207004F Dialight	LED 5MM QUAD GREEN PC MNT	75
5912504002F Dialight	LED PRISM 3MM RND LC ORN SMD	0
5555009F Dialight	LED CBI 2MM RED 5V RES QUAD TH	237
5912701013F Dialight	LED PRISM 3MM RA ALGAAS ALBER SM	1493
5332H5 Visual Communications Company, LLC	LED GREEN T1-3/4 VERTICAL PCMNT	2275
H178CBC-3 Califia Lighting (Bivar)	LED GREEN/RED 625/568NM R/A	93
COM-09938 SparkFun	10 SEGMENT LED BAR GRAPH - GREEN	0
5612301100F Dialight	LED 5MM VERT HIEFF DIFF YEL PCMT	0

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