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

Part Number	Description / PDF	Quantity
5615601080F Dialight	LED 5MM VERT SUP CLEAR GRN PC MT	0
5520822F Dialight	LED 2HI 5MM SUP BRIGHT GRN PCMNT	1
5510211F Dialight	LED CBI 3MM HI EFF GREEN .200	651
5530132200F Dialight	LED CBI 3MM BI-LVL YELLOW/GREEN	0
5710112100F Dialight	LED CBI IND 2MM BI-LEVEL RD/GRN	815
5962324002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5912304107F Dialight	LED PRISM 3MM RND LC SQ GRN SMD	0
5500407004F Dialight	LED 5MM QUAD RED PC MNT	0
5554303F Dialight	LED 2MM QUAD 5V GREEN	0
5505308F Dialight	LED CBI 5MM YLW DIFF 25A	0
5680701110F Dialight	LED CBI 3MM 4X1 R/G,R/G,R/G,X	0
5913001837F Dialight	LED PRISM 3MM TRUE G/R SMD	3200
5511309F Dialight	LED 3MM RT ANG LOW CUR GRN PCMNT	6156
5510607F Dialight	LED 3MM 5V GREEN	4075
5530211F Dialight	LED 3MM LOW CURR RED	366
5612201070F Dialight	LED 5MM VERT HE DIFF GRN PC MNT	799
5530744200F Dialight	LED CBI 3MM BI-LVL YW/GRN YW/GRN	0
5511107004F Dialight	LED 3MM QUAD LOW CUR RED PC MNT	139
5554003F Dialight	LED 2MM QUAD 5V RED	1619
5912304113F Dialight	LED PRISM 3MM RND LC SQ GRN SMD	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