LED Indication - Discrete

Part Number	Description / PDF	Quantity
SM0805RC Califia Lighting (Bivar)	LED RED CLEAR 0805 SMD	0
SM0805UOC Califia Lighting (Bivar)	LED ORANGE CLEAR 0805 SMD	0
SMS1105UWDN Califia Lighting (Bivar)	LED NEUT WHT DIFF 2PLCC SMD R/A	41894
SM1206NBWC-IL Califia Lighting (Bivar)	LED BLUE CLEAR 1206 SMD	3991
SMS1105UWDW Califia Lighting (Bivar)	LED WARM WHT DIFF 2PLCC SMD R/A	39489
SMTL2-YC Califia Lighting (Bivar)	LED YELLOW CLEAR 2PLCC SMD	0
1.8GDL Califia Lighting (Bivar)	LED GREEN DIFFUSED 1.8MM T/H	0
SM1204BC-R/B Califia Lighting (Bivar)	LED BLUE/RED CLEAR 1204 SMD R/A	47363
SMTL2-AC Califia Lighting (Bivar)	LED AMBER CLEAR 2PLCC SMD	0
3BC-3-F Califia Lighting (Bivar)	LED GREEN/RED DIFFUSED T-1 T/H	880
R20BLU-5-0080 Califia Lighting (Bivar)	LED BLUE CLEAR T/H	0
SM0603GCL Califia Lighting (Bivar)	LED GREEN CLEAR 0603 SMD	12471
SM0605BC-R/G Califia Lighting (Bivar)	LED GREEN/RED CLEAR 0605 SMD	16208
SM0402OC Califia Lighting (Bivar)	LED ORANGE CLEAR 0402 SMD	82
SMTL2-SYC Califia Lighting (Bivar)	LED YELLOW CLEAR 2PLCC SMD	327
SM1204PGC Califia Lighting (Bivar)	LED GREEN CLEAR 1204 R/A SMD	8645
SMTL4-BC Califia Lighting (Bivar)	LED GREEN/RED CLEAR 4PLCC SMD	6131
SM1206BWC-IL Califia Lighting (Bivar)	LED BLUE CLEAR 1206 SMD	0
SMTL2-OC Califia Lighting (Bivar)	LED ORANGE CLEAR 2PLCC SMD	0
3BCC-F Califia Lighting (Bivar)	LED GREEN/RED CLEAR 3MM T/H	5093

LED Indication - Discrete

1. Overview

Discrete Light Emitting Diodes (LEDs) are single-chip optoelectronic devices that convert electrical energy into light through electroluminescence. This product category forms the foundation of modern indication systems, offering advantages including low power consumption, long lifespan, and high reliability. Their importance spans across consumer electronics, industrial equipment, automotive systems, and communication infrastructure.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Visible LEDs	Emits light in visible spectrum (400-700nm), available in multiple colors	Indicator lamps, display backlighting, decorative lighting
Infrared LEDs	Emits 700nm-1mm wavelength radiation, invisible to human eye	Remote controls, security sensors, night vision systems
High-Brightness LEDs	Enhanced luminous intensity (>1000mcd) with advanced packaging	Automotive lighting, outdoor displays, emergency signage
UV LEDs	Ultraviolet spectrum emission (280-400nm)	Sterilization equipment, counterfeit detection, curing systems

3. Structure and Composition

Typical discrete LED construction includes:

Die: Semiconductor chip (GaN/InGaN for blue/green, AlGaInP for red)
Encapsulation: Epoxy or silicone lens for light extraction and protection
Lead Frame: Copper or iron alloy for electrical connection and heat dissipation
Phosphor Coating: Used in white LEDs for wavelength conversion
Reflective Cup: Optimizes light directionality

4. Key Technical Parameters

Parameter	Significance	Typical Range
Wavelength	Determines light color and application suitability	375nm-940nm
Luminous Intensity	Measures brightness output (mcd)	50-10,000mcd
Forward Current	Operating current rating	20-150mA
Forward Voltage	Electrical potential drop	1.8-3.6V
Viewing Angle	Light emission spread measurement	5 -120

5. Application Fields

Primary application sectors include:

Consumer Electronics: Mobile phone indicators, keyboard backlighting
Automotive: Dashboard indicators, brake light systems
Industrial: Machine status indicators, safety signage
Medical: Diagnostic equipment indicators, phototherapy devices
Telecommunications: Network equipment status lights

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Cree Inc.	XLamp XP-G3	High brightness (3200mcd), 120 viewing angle
OSRAM Opto	OSTAR Projection	High-power LED for automotive lighting
Nichia Corp.	NSHU5991	UV LED (365nm) for curing applications
Everlight Electronics	LTST-C19HE8WT	Tri-color LED for RGB indication

7. Selection Recommendations

Key consideration factors:

Spectral Requirements: Match wavelength to application needs
Environmental Conditions: Temperature range (-40 C to +85 C typical)
Power Constraints: Select appropriate current/voltage ratings
Optical Design: Consider lens type and viewing angle
Reliability: Check MTTF (Mean Time to Failure) specifications

Industry Development Trends

Current technology directions include:

Miniaturization: Development of micro-LED ( LED) with dimensions <50 m
Efficiency Improvement: Targeting >300lm/W efficacy for visible LEDs
Smart Integration: Incorporating driver ICs and sensors in LED packages
Material Innovation: GaN-on-silicon substrates for cost reduction
Regulatory Compliance: RoHS/REACH compliant packaging materials