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

Part Number	Description / PDF	Quantity
5660306F Dialight	LED 2MM X 5MM RT ANGLE YEL PCMNT	72
5510609F Dialight	LED 3MM 5V RT ANG GREEN PC MNT	856
5913101013SF Dialight	LED PRISM 3MM YLW,GRN SILIC SMD	0
5514207803F Dialight	LED CBI 3MM GRN 525NM RA	0
5912001107F Dialight	LED PRISM 3MM SQ HI EFF RED SMD	0
5611301100F Dialight	LED 5MM VERT LOW CUR GREEN PCMT	1570
5500705F Dialight	LED 5MM 5V RT ANGLE GREEN PC MNT	844
5640710555F Dialight	LED CBI 3MM 3X1 R/Y,R/Y,R/Y DIFF	310
5530781853F Dialight	LED CBI 3MM BI-LVL BLUE/RED DIFF	0
5680202323F Dialight	LED 4HI 3MM GRN/YEL/GRN/YEL PCMT	345
5520922F Dialight	LED 2HI 5MM LOW CUR GRN PC MNT	2666
5530744306F Dialight	LED CBI 3MM BI-LVL YW/GN YW/GN	144
5700100333F Dialight	LED 3HI 2MM YELLOW	954
5912004113F Dialight	LED PRISM 3MM RND LC SQ RED SMD	0
5642210222F Dialight	LED CBI 3MM 3X1 GRN,GRN,GRN TINT	0
5505605F Dialight	LED 5MM RT ANG SUP CLR GRN PCMNT	175
5913001002HF Dialight	LED PRISM 3MM RED,GRN HYSOL SMD	0
5690112300F Dialight	LED CBI 3MM BI-LEVEL GRN,YLW	7
5912404113F Dialight	LED PRISM 3MM RND LC SQ YLW SMD	0
5510403F Dialight	LED CBI 3MM HI EFF RED DIFF .250	321

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