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

Part Number	Description / PDF	Quantity
5511207F Dialight	LED 3MM LOW CURR YELLOW	1040
5690113300F Dialight	LED 2HI 3MM NARROW YELLOW PC MNT	17
5510407004F Dialight	LED 3MM QUAD HI EFF RED PC MNT	1005
5554007F Dialight	LED 2MM QUAD 5V RED	1071
5510307004F Dialight	LED 3MM QUAD HI EFF YELLOW PC M	45218280
5952902007F Dialight	LED PRISM 2MM SQ INGAN GREEN SMD	0
5511104F Dialight	LED CBI 3MM RED LOW CURR RA	1800
5913501831F Dialight	LED PRISM DIFFUSED RND RGB SMD	726
5922927313F Dialight	LED CBI PRISM BLVL GRN/YW TR SIL	0
5530212F Dialight	LED CBI 3MM BI-LVL RED/GRN DIFF	1679
5502407004F Dialight	LED 5MM QUAD RED HI EFF PC MNT	10
5700100311F Dialight	LED CBI 2MM 3X1 YLW,RED,RED DIFF	0
5523511F Dialight	LED 5MM RED/GRN BICLR 3LEAD	483
5700100222F Dialight	LED 3HI 2MM GREEN	1663
5503507F Dialight	LED CBI 5MM RED/GRN BI-COLOR RA	203
5615101050F Dialight	LED 5MM VERT SUP DIFF RED PC MNT	266
5513003F Dialight	LED CBI 3MM RED/GRN BICOLOR .250	0
5530210F Dialight	LED 3MM BI-LEVEL RED/BLANK	0
5962626002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5520233F Dialight	LED 2HI 5MM RT ANG YELLOW PC MNT	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