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

Part Number	Description / PDF	Quantity
5640700444F Dialight	LED 3HI 3MM YEL/GRN BICLR PC MNT	49
5500404F Dialight	LED 5MM VERTICAL RED PC MNT	852
5502205F Dialight	LED 5MM RT ANG HI EFF GRN PC MNT	192
5615201070F Dialight	LED 5MM VERT SUP DIFF GRN PC MNT	2273
5530112204F Dialight	LED CBI 3MM BI-LEVEL TH	0
5923024302F Dialight	LED PRISM 3MM BI-COLOR SMD	0
5922222313F Dialight	LED CBI PRISM BLVL GN/GN TR SIL	214
5511107809F Dialight	LED CBI 3MM RED DIFFUSED RA .200	0
5530711200F Dialight	LED CBI 3MM BI-LVL RD/GRN RD/GRN	479
5530222204F Dialight	LED CBI 3MM BI-LVL 4X2 BLK GREEN	4
5505105F Dialight	LED 5MM RT ANG SUP DIFF RED PCMN	779
5912504013F Dialight	LED ORANGE PRISM/CBI 606NM SMD	0
5961010002F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5520232F Dialight	LED CBI 5MM BI-LVL YLW/GRN DIFF	0
5912101113F Dialight	LED PRISM 3MM ALGASS RED SMT	0
5640700111F Dialight	LED 3HI 3MM RED/GRN BICLR PC MNT	2222
5680724444F Dialight	LED CBI 4X1 RECT Y/G,Y/G,Y/G,Y/G	510
5554301F Dialight	LED 2MM QUAD GREEN	0
5952701013HFBRF Dialight	LED 2MM PRISM Y 13" HYSOL LENS	968
5530128F Dialight	LED 3MM BI-LEVEL GRN/BLUE PC MNT	334

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