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

Part Number	Description / PDF	Quantity
5640100132F Dialight	LED 3HI 3MM RED/YEL/GRN PC MNT	0
5663507F Dialight	LED 2MMX5MM RT ANG RED/GRN PCMNT	766
5510203F Dialight	LED CBI 3MM GREEN DIFF RA SGL	1569
5513307F Dialight	LED CBI 3MM BLUE/GREEN RA	0
5501107F Dialight	LED 5MM RT ANG LOW CUR RED PCMNT	2629
5640100221F Dialight	LED CBI 3MM 3X1 GRN/GRN/RED DIFF	0
5520911F Dialight	LED 2HI 5MM LOW CUR RED PC MNT	1612
5962023013F Dialight	596 PRISM SMD 1.6MM BILEVEL RND	0
5511609F Dialight	LED CBI 3MM YELLOW TINTED RA	0
5690113200F Dialight	LED CBI 3MM BI-LEVEL YLW,GRN	0
5530222400F Dialight	LED CBI 3MM BI-LVL GRN/GRN DIFF	17
5502204F Dialight	LED 5MM VERT HI EFF GREEN PC MNT	1929
5530133F Dialight	LED 2HI 3MM YELLOW PC MNT	1586
5912301002F Dialight	LED PRISM 3MM RND GREEN SMD	612
5522222100F Dialight	LED CBI 5MM BI-LEVEL BKLT GN/GN	0
5510607004F Dialight	LED 3MM QUAD 5V GREEN PC MNT	143
5505505F Dialight	LED 5MM RT ANG SUP CLR RED PCMNT	1894
5530008837F Dialight	LED CBI 3MM G,G,X,X,G,G,G,G RA	0
5680201330F Dialight	LED CBI 3MM 4X1 RED,YLW,YLW X	1530
5962626013F 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