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

Part Number	Description / PDF	Quantity
5530741F Dialight	LED CBI 3MM BI-LVL YW/GRN RD/GRN	570
5530133300F Dialight	LED 2HI 3MM DIFF YELLOW PC MNT	0
5501007F Dialight	LED 5MM R/A BLUE WATER CLEAR	310
5500804F Dialight	LED 5MM 5V VERTICAL YELLOW PCMNT	31
5913001815F Dialight	LED PRISM 3MM SQ RED,GRN SMD	0
5912801007F Dialight	LED PRISM 3MM RND INGAN WHT SMD	0
5640100223F Dialight	LED CBI 3MM 3X1 GRN/GRN/YLW DIFF	0
5913001002F Dialight	LED PRISM 3MM BICOLOR RD,GN SMD	4032
5640200201F Dialight	LED CBI 3MM 3X1 GREEN/X/RED	0
5505204F Dialight	LED 5MM VERT SUP DIFF GREEN PCMT	558
5505507F Dialight	LED 5MM RT ANG SUP CLR RED PCMNT	0
5530111200F Dialight	LED CBI 3MM BI-LVL RED/RED	7
5913101826F Dialight	LED PRISM 3MM SQ YLW,GRN SMD	0
5640700414F Dialight	LED CBI 3MM 3X1 Y/G,R/G/Y/G	12
5532223300F Dialight	LED CBI 3MM BI-LVL GRN/YLW TINT	0
5501005F Dialight	LED 5MM R/A BLUE WATER CLEAR	1964
HLMPK101104F Dialight	LED CBI 3MM ARRAY 1X4 ALG RED TH	0
5510201F Dialight	LED CBI 3MM DIN GRN DIFF RA SGL	540
5700100723F Dialight	LED CBI 2MM 3X1 ORN,GRN,YLW DIFF	0
5660207F Dialight	LED 2MM X 5MM RT ANGLE GRN PCMNT	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