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

Part Number	Description / PDF	Quantity
5505307F Dialight	LED 5MM RT ANG SUP DIFF YEL PCMT	2123
5640740111F Dialight	LED CBI 3MM 3X1 R/G,R/G,R/G	0
5330H5 Visual Communications Company, LLC	LED GREEN T1-3/4 PCB	1459
5552001F Dialight	LED 2MM RT ANGLE RED PC MNT	0
5680212802F Dialight	LED CBI 4MM 4X1 GRN,CUST,X,GRN	0
HLMP-2350-EF000 Broadcom	LIGHT BAR 0.8X0.195" HER	3431
553-0111 Visual Communications Company, LLC	LED 3MM BI-LEVEL RED RA PCB	13
XVG2LUR11D SunLED	LED 2POS GREEN DIFFUSED CBI	0
5530122300F Dialight	LED 2HI 3MM DIFF GREEN PC MNT	4671
5532221100F Dialight	LED CBI 3MM BI-LVL GRN/RED TINT	0
5612101080F Dialight	LED 5MM VERT HE DIFF RED PC MNT	8
5680F1_1 Visual Communications Company, LLC	LED RED T1 DUAL RIGHT ANGLE PCB	0
5912801107F Dialight	LED PRISM 3MM SQ WHITE SMD	276
5510703F Dialight	LED CBI 3MM GREEN DIFF 5V .250	0
A01PC NKK Switches	INDICATOR LOW PRO STR RED LED	50
5360F1 Visual Communications Company, LLC	LED RED T-1 QUAD RT ANG PCB	2080
5952401002NF Dialight	2MM PRISM Y SAMPLE STRIP	0
5923126302F Dialight	LED CBI PRISM BLVL YG/BLU SIL	0
KB2655EW Kingbright	LED LIGHT BAR 8.89X8.89MM RED	4217
5962424013F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	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