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

Part Number	Description / PDF	Quantity
WP1384AD/ID Kingbright	LED RA 3.4MM 627NM HE RED DIFF	1315
5502404F Dialight	LED 5MM VERT HI EFF RED PC MNT	2800
5912701848F Dialight	LED SMD PRISM 3MM 590NM YLW	0
AM2520EF/4SGD Kingbright	SUPER BRIGHT GREEN SOLID STATE L	0
5511209F Dialight	LED 3MM RT ANG LOW CUR YEL PCMNT	8133
MV63538MP7	LED SS YELLOW DIFFUSED PCB 5MM	3750
XNN1LUYR86M SunLED	LED 3MM 1POS YLW/RED WHT DIFF RA	0
5532232100F Dialight	LED CBI 3MM BI-LVL YLW/GRN TINT	531
5690101111F Dialight	LED 2X2 3MM HI DENSITY RED PCMNT	908
6321F5 Visual Communications Company, LLC	LED GREEN T1 MODULAR ASSY	2402
5502507F Dialight	LED 5MM RTANG HI EFF ORANGE PCMT	660
5350T7 Visual Communications Company, LLC	LED YELLOW T-3/4 RT ANG PCB	524
XEUY2755M SunLED	LIGHTBAR 8.89MM SQ YLW WHT DIFF	0
KB-A100SRW Kingbright	LIGHT BAR 660NM RED 8.89X3.81MM	0
5923030302F Dialight	LED CBI PRISM BLVL RG/RG SIL	238
SMA-B500PG G/W American Opto Plus LED Corp.	SMD 5 SEGMENT BARGRAPH	1822
5912504113F Dialight	LED PRISM 3MM RND LC SQ ORN SMD	0
5510411F Dialight	LED CBI 3MM HI EFF RED .201	1755
5912304002F Dialight	LED PRISM 3MM RND LC GRN SMD	0
5710111F Dialight	LED 2MM BI-LEVEL RED/RED DIFF	4099

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