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

Part Number	Description / PDF	Quantity
HLMP-6820-F0010 Broadcom	LED DOME 5V 565NM GN DIFF RA AXL	6681
5913001113SF Dialight	LED PRISM 3MM SQ RED,GRN SMD	0
5532222F Dialight	LED CBI 3MM BI-LVL GRN/GRN TINT	0
SSB-LX2400YW Lumex, Inc.	LED LT BAR 5X10MM 2CHIP YEL DIFF	49
5680103111F Dialight	LED CBI 3MM 4X1 YLW,RED,RED,RED	0
5552007F Dialight	LED 2MM 5V RT ANGLE RED PCMNT	2289
5912801013F Dialight	LED 3MM PRISM WHITE SMD	0
DE2SGD Kingbright	LIGHT BAR 565NM GREEN 7.5X14MM	0
5952701013F Dialight	LED PRISM 2MM SQ ALLNGAP YLW SMD	0
WP1043ID Kingbright	LED LIGHT BAR SGL 3.65X6.15MM RD	3943
5612301060F Dialight	LED 5MM VERT HE DIFF YLW PC MNT	1378
CMW01R Visual Communications Company, LLC	LED RED T1 MODULAR DIFFUSED	2797
5352T1-5V Visual Communications Company, LLC	LED RED T-3/4 RT ANG 5V PCB	39
5530741F Dialight	LED CBI 3MM BI-LVL YW/GRN RD/GRN	570
5300H7LC Visual Communications Company, LLC	LED YELLOW T1-3/4 RT ANG LC PCB	0
6200T5LC Visual Communications Company, LLC	LED GREEN RIGHT ANGLE LO CUR SMD	1000
5530133300F Dialight	LED 2HI 3MM DIFF YELLOW PC MNT	0
COM-09935 SparkFun	10 SEGMENT LED BAR GRAPH - RED	0
0035.9640.7 Schurter	HOLDER W/LED 3MM YELLOW R/A SGL	1412
5501007F Dialight	LED 5MM R/A BLUE WATER CLEAR	310

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