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

Part Number	Description / PDF	Quantity
5502405F Dialight	LED 5MM RT ANG HI EFF RED PCMNT	4087
5553401F Dialight	LED 2MM VERTICAL YELLOW PC MNT	16079
5530332F Dialight	LED CBI 3MM BI-LVL YLW/GRN DIFF	380
5922324313F Dialight	BI-LEVEL PRISM G-Y 13" REEL SIL	0
5506207F Dialight	LED CBI 4MM FLAT TOP GRN DIFF RA	243
5913201113F Dialight	LED PRISM 3MM RND RED,YLW SMD	0
5615101070F Dialight	LED 5MM VERT SUP DIFF RED PC MNT	171
5690794805F Dialight	3MM BI-LEVEL CBI BLUE-Y/G	242
5615501100F Dialight	LED 5MM VERT SUP CLEAR RED PCMNT	0
5690111100F Dialight	LED 2HI 3MM NARROW RED PC MNT	77
5502207F Dialight	LED 5MM RT ANG HI EFF GRN PC MNT	4397
5505108F Dialight	LED CBI 5MM RED DIFF 25A	0
5690212300F Dialight	LED CBI 3MM BI-LEVEL GRN,YLW	360
5913101107F Dialight	LED PRISM 3MM SQ YLW,GRN SMD	0
5530321F Dialight	LED CBI 3MM BI-LVL GRN/RED DIFF	118
5640100833F Dialight	LED CBI 3MM 3X1 RED/GRN/BLU DIFF	718
5952602002F Dialight	LED PRISM 2MM SQ INGAN BLUE SMD	0
5680701819F Dialight	LED CBI 3MM 4X1 R/G,R/G,R/G,R/G	2
5615501070F Dialight	LED 5MM VERT SUP CLEAR RED PC MT	0
5912501013F Dialight	LED SMD PRISM 3MM ORN RND LENS	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