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

Part Number	Description / PDF	Quantity
5680731830F Dialight	LED 3MM QUAD CBI R/G RVSE POL	0
5615101100F Dialight	LED 5MM VERT SUP DIFF RED PC MNT	1596
5510301F Dialight	LED CBI 3MM DIN YLW DIFF RA SGL	0
5912901102F Dialight	LED SMD PRISM 3MM TRUE GREEN SQ	0
5912501002F Dialight	LED SMD PRISM ORANGE RND LENS	0
5530744100F Dialight	LED CBI 3MM BI-LVL BKLT Y/G Y/G	0
5923031313F Dialight	LED CBI PRISM BLVL RG/YG TR SIL	415
5615601100F Dialight	LED 5MM VERT SUP CLEAR GRN PCMNT	0
5912404002F Dialight	LED PRISM 3MM RND LC YLW SMD	0
5912901113F Dialight	LED SMD PRISM 3MM TRUE GREEN SQ	0
5510207F Dialight	LED 3MM HIGH EFF GREEN	12673
5510603F Dialight	LED CBI 3MM GREEN DIFF 5V .250	0
5913001013F Dialight	LED PRISM 3MM RA SUP RED/GRN SMT	12571
5000036F Dialight	DEMO BOX 598 MICROLED	0
5923535302F Dialight	LED CBI PRISM BLVL RGB/RGB SIL	2
5913101013F Dialight	LED PRISM 3MM RT ANG YEL/GRN SMT	0
5680102323F Dialight	LED 4HI 3MM GRN/YEL/GRN/YEL PCMT	365
5500407F Dialight	LED 5MM RT ANGLE RED PC MNT	3491
5511702F Dialight	LED CBI 3MM HI EFF RED TINTED RA	3700
5530121F Dialight	LED 2HI 3MM GREEN OVER RED PCMNT	8415

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