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

Part Number	Description / PDF	Quantity
5553009F Dialight	LED 2MM 5V VERTICAL RED PC MNT	312
5530211300F Dialight	LED 2HI 3MM LOW CUR RED PC MNT	227
5912701007SF Dialight	LED PRISM 3MM RND ALLINGAP Y SMD	0
5913101102SF Dialight	LED PRISM 3MM SQ YW,GN SILIC SMD	0
5680701041F Dialight	LED CBI 3MM 4X1 R/G,X,Y/G,R/G	20
5503007F Dialight	LED 5MM RT ANG RED/GRN DIFF PCMT	5388
5962926002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5912101107F Dialight	LED PRISM 3MM SQ ALGAAS RED SMD	0
5700100332F Dialight	LED CBI 2MM 3X1 YLW,YLW,GRN DIFF	0
5912001002F Dialight	LED PRISM 3MM RND HI EFF RED SMD	850
5913101102F Dialight	LED PRISM 3MM SQ YLW,GRN SMD	0
5553001F Dialight	LED 2MM VERT RED PC MNT	0
5503007004F Dialight	LED 5MM RT ANG RED/GRN DIFF PCMT	0
5912301102SF Dialight	LED PRISM 3MM SQ GREEN SIL SMD	0
5511307004F Dialight	LED 3MM QUAD LOW CUR GRN PCMNT	441
5912301113F Dialight	LED PRISM 3MM GREEN	7590
5912701102F Dialight	LED PRISM 3MM SQ ALLINGAP YW SMD	0
5680702837F Dialight	LED CBI 3MM QUAD LEVEL	0
5962423002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5510003828F Dialight	LED CBI 3MM YW/GN/GN TRI LEVEL	762

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