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

Part Number	Description / PDF	Quantity
SSF-LXH103ID Lumex, Inc.	LED 3MM RA FAULT-IND RED PC MNT	0
SSF-LXH305GD Lumex, Inc.	LED T-3MM 565NM GRN DIFF RA SMD	46
SMF-HM1530GD-305 Lumex, Inc.	LED 3MM RA 565NM GREEN DIFF SMD	0
SSA-LXB525SRD Lumex, Inc.	LED ARRAY 2X5MM 5-SEG SUPER RED	69
SSF-LXH240IID Lumex, Inc.	LED 3MM RA 2-HI RED/RED PC MNT	1714
SSF-LXH100MID Lumex, Inc.	LED 5MM RA MATING RED PC MOUNT	3181
SSA-LXH1025GD Lumex, Inc.	LED ARRAY 2.5X5MM 10-SEG GREEN	744
SSF-LXH103HGW Lumex, Inc.	LED 3MM RA RED/GRN BICOLOR PCMT	7427
SSF-LXH100GD-01 Lumex, Inc.	LED 5MM RA GREEN DIFF PC MOUNT	3189
SSF-LXH4RA5YD Lumex, Inc.	LED 5MM RELAMPABLE YELLOW PC MNT	1558
SSF-LXH240IGD Lumex, Inc.	PCB DUAL TWR LED IND, RED/GREEN	10112
SSF-LXH103UWC Lumex, Inc.	LED 3MM BRIGHT WHITE WATER CLEAR	823
SSF-LXH100LID Lumex, Inc.	LED 5MM RA LOWCUR RED PC MOUNT	10011
SSA-LXB525YD Lumex, Inc.	LED ARRAY 2X5MM 5-SEG YELLOW	0
SSF-LXH100LGD-01 Lumex, Inc.	LED 5MM RA LOWCUR GREEN PC MNT	396
SSF-LXH100MSRD Lumex, Inc.	LED 5MM RA MATING SUP RED PCMNT	1980
SSF-LXH2103LGGD/4 Lumex, Inc.	LED 3MM 2-HI GRN/GRN LOW I PCMNT	291
SSF-LXH103SRD Lumex, Inc.	LED 3MM RA FAULTIND SUPRED PCMT	0
SSF-LXH103GD Lumex, Inc.	LED 3MM RA FAULT-IND GRN PC MNT	24407
SSF-LXH22573LGGD Lumex, Inc.	LED 2X5MM RA 2-HI GRN LO-I PCMT	558

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