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

Part Number	Description / PDF	Quantity
5530323F Dialight	LED CBI 3MM BI-LVL GRN/YLW DIFF	750
XGCBDX20D SunLED	BAR GRAPH ARRAY 20-SEG BLUE	0
5912501113F Dialight	LED PRISM 3MM SQ ORANGE SMD	700
XVB1LUR11D SunLED	LED 1POS RED DIFFUSED CBI	0
5530177300F Dialight	LED 2HI 3MM DIFF ORANGE PC MNT	0
5520211F Dialight	LED 2HI 5MM RT ANG RED PC MNT	836
0035.9640.1 Schurter	HOLDER W/LED 3MM RED RT ANG SGL	196
5341H7 Visual Communications Company, LLC	LED YELLOW T1-3/4 VERTICAL PCB	112
5554401F Dialight	LED 2MM QUAD YELLOW	0
XEUY2450M SunLED	LIGHTBAR 19.05X3.81MM YLW WH DIF	0
A01PF NKK Switches	INDICATOR SW LOPRO STRAIGHT GRN	51
5913201002F Dialight	LED PRISM 3MM RND RED,YLW SMD	0
5503007002F Dialight	LED CBI 5MM RED/GRN DUAL BLK	0
5912701002F Dialight	LED PRISM 3MM RND ALLINGAP Y SMD	310
5690101372F Dialight	LED CBI 3MM BI-LEVEL R,Y,O,G	0
5372T3-5VLC Visual Communications Company, LLC	LED AMBER T-3/4 5V VERT LC PCB	36
5500707F Dialight	LED 5MM 5V RT ANGLE GREEN PC MNT	86
5660206F Dialight	LED 2MM X 5MM RT ANGLE GRN PCMNT	3794
QLA694BGY	LED BI-LEVEL GRN/YELLOW PCB 3MM	543
AA3528AVU/ACGSK Kingbright	LED 3MM 1-LEVEL GRN SMD	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