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

Part Number	Description / PDF	Quantity
5552008F Dialight	LED 2MM 24V RT ANGLE RED PCMNT	780
5500405F Dialight	LED 5MM RT ANGLE RED PC MNT	8244
5923030313F Dialight	BI-LEVEL R/G-R/G 13" REEL SIL	21
5640200111F Dialight	LED 3HI 3MM LOW CUR RED PC MNT	7564500
5612201100F Dialight	LED 5MM VERT HIEFF DIFF GRN PCMT	111
5912004013F Dialight	LED RED PRISM/CBI 630NM SMD	2255
5510507004F Dialight	LED 3MM QUAD 5V RED PC MNT	0
5530231F Dialight	LED CBI 3MM BI-LVL YLW/RED DIFF	1579
5690107777F Dialight	LED 2X2 3MM HI DENSITY ORN PCMNT	0
5912301102F Dialight	LED PRISM 3MM SQ GREEN SMD	0
5913001002SF Dialight	LED PRISM 3MM RED,GRN SILIC SMD	0
5690112100F Dialight	LED CBI 3MM BI-LEVEL GRN,RED	254
5500704F Dialight	LED 5MM 5V VERTICAL GREEN PC MNT	0
5614301055F Dialight	LED 2.5MM X 7MM VERT YELLOW PC M	774
5615601060F Dialight	LED 5MM VERT SUP CLEAR GRN PC MT	4
5552009F Dialight	LED 2MM 5V RT ANGLE RED PCMNT	0
5913101113F Dialight	LED PRISM 3MM SQ YLW,GRN SMD	0
5680701823F Dialight	LED CBI 3MM 4X1 R/G,Y/G,Y/G,Y/G	0
5912201113F Dialight	LED PRISM 3MM SQ HI INT GRN SMD	0
5612101070F Dialight	LED 5MM VERT HE DIFF RED PC MNT	278

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