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

Part Number	Description / PDF	Quantity
5510001881F Dialight	LED CBI 3MM YELLOW SGL BLOCK RA	0
5500001853F Dialight	LED CBI 5MM 1LEVEL	0
5510307100F Dialight	LED CBI 3MM YELLOW DIFF RA .200	0
5530177005F Dialight	LED CBI 3MM BI-LVL ORN/ORN DIFF	0
5530113802F Dialight	LED CBI 3MM BI-LVL RED/YELLOW	0
5511111F Dialight	LED CBI 3MM RED LOW CURR .200	0
5530008812F Dialight	LED CBI 3MM R,Y,R,Y,X,X,X,X RA	0
5503107004F Dialight	LED CBI 5MM YLW/GRN QUAD BLOCK	0
5680100222F Dialight	3MM QUAD LEVEL CBI X-G-G-G	0
5502207100F Dialight	LED CBI 5MM GREEN DIFFUSED RA	0
5530213400F Dialight	LED CBI 3MM BI-LVL RED/YLW DIFF	2200
5690714804F Dialight	LED CBI 3MM BI-LEVEL Y/G,BLUE	0
5530002842F Dialight	LED CBI 3MM YW/RD DIFF BI-LVL RA	0
5680701414F Dialight	LED CBI 3MM 4X1 R/G,Y/G,R/G,Y/G	0
5532223110F Dialight	LED CBI 3MM BI-LVL GRN/YLW TINT	0
5680101237F Dialight	LED CBI 3MM 4X1 RED,GRN,YLW,ORN	0
5690101970F Dialight	LED CBI 3MM BI-LEVEL R,B,O,X	0
5512507004F Dialight	LED 3MM QUAD HI EFF ORN PC MNT	0
5680103022F Dialight	LED 3MM QUAD LEVEL CBI	0
HLMP1700104F Dialight	LED CBI 3MM ARRAY 1X4 RED 2MA TH	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