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

Part Number	Description / PDF	Quantity
5530744F Dialight	LED 2HI 3MM YEL/GRN BICLR PC MNT	4398
5503004F Dialight	LED 5MM VERT RED/GRN DIFF PCMNT	477
5553403F Dialight	LED 2MM 5V VERTICAL YELLOW PC MN	720
5912201007F Dialight	LED PRISM 3MM RND HI INT GRN SMD	975
5680103122F Dialight	LED 3MM QUAD LEVEL CBI Y,R,G,G	0
5611101100F Dialight	LED 5MM VERT LOW CUR RED PC MNT	721
5962429002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5922727302F Dialight	LED CBI PRISM BLVL YW/YW SIL	0
5912701846F Dialight	LED SMD PRISM 3MM 590NM YLW	0
5503505F Dialight	LED 5MM RED/GRN BICLR 3LEAD	388
5515911F Dialight	LED CBI 3MM GRN 532NM W/PIN RA	0
5530122F Dialight	LED 2HI 3MM GREEN PC MNT	12072
5913001107F Dialight	LED PRISM 3MM SQ RED,GRN SMD	0
5530203200F Dialight	LED CBI 3MM BI-LVL BLANK/YELLOW	0
5505304F Dialight	LED 5MM VERT SUP DIFF YEL PC MNT	0
5510407F Dialight	LED 3MM HIGH EFF RED	6872
5912401102F Dialight	LED PRISM 3MM SQ YELLOW SMD	0
5912201102F Dialight	LED PRISM 3MM SQ HI INT GRN SMD	0
5913101113SF Dialight	LED PRISM 3MM SQ YW,GN SILIC SMD	0
5530004810F Dialight	LED CBI 3MM MULTI-LEVEL	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