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

Image	Part Number	Description / PDF	Quantity	Rfq
	H134CGYAHD-140 Califia Lighting (Bivar)	LED ASSY RA 3MM GN/YAMB/RD DFF	0
	ELM13505GD Califia Lighting (Bivar)	LED ASSY VERT	0
	H401CGDL Califia Lighting (Bivar)	LED ASSY RA 3MM 4X1 GREEN DIFF	0
	ELM14255GD Califia Lighting (Bivar)	LED ASSY VERT 5MM GRN 565NM	0
	H131CBC-Y/G-120 Califia Lighting (Bivar)	LED ASSY RA 3MM YLGRN WHT DIFF	0
	ELM50603GDL Califia Lighting (Bivar)	LED ASSY VERT	0
	H200CYD Califia Lighting (Bivar)	LED ASSY RA 3MM 2LVL YLW DIFF	0
	H400CYD Califia Lighting (Bivar)	LED ASSY RA 3MM 4X1 YLW DIFF	0
	R2F-12.0-RED Califia Lighting (Bivar)	ORCA ADAPTER LT PIPE RED 2.4V	0
	H278CHGD Califia Lighting (Bivar)	LED ASSY RA 5MM 2LVL HER/GN DIFF	0
	FLPR6.0-UG Califia Lighting (Bivar)	LIGHT PIPE 4MM RND LENS	0
	ELM75MM3RD Califia Lighting (Bivar)	LED ASSY 5MM 3MM RED DIFF 2LD	0
	ELM10555GD Califia Lighting (Bivar)	LED ASSY VERT 5MM GRN PVC 565NM	0
	H175CSRD Califia Lighting (Bivar)	LED ASSY RA 5MM RED DIFF	0
	H131CBC-180 Califia Lighting (Bivar)	LED ASSY RA 3MM	0
	ELM54003HD Califia Lighting (Bivar)	LED ASSY VERT	0
	H131CYDL-120 Califia Lighting (Bivar)	LED ASSY RA 3MM YELLOW DIFF	0
	H485CAD Califia Lighting (Bivar)	LED ASSY RA 1.8MM 4X1 AMBER DIFF	0
	ELM22003RD Califia Lighting (Bivar)	LED ASSY 0.200" 3MM RED DIFF 2LD	0
	ORFLP2-RG Califia Lighting (Bivar)	ORCA LIGHT PIPE ADAPTER	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