LED Indication - Discrete

Part Number	Description / PDF	Quantity
XZMYK45WT-9 SunLED	LED YELLOW CLEAR 2PLCC SMD	1140
XLMDK01D SunLED	10MM RED LED	0
XLMDKCBD59M SunLED	LED BLUE/RED DIFF T-1 3/4 T/H	4045
XSUY18D SunLED	LED YELLOW DIFF RECT 2MMX5MM T/H	9800
XZFBB87W SunLED	LED BLUE CLEAR 2SMD R/A	1785
XZMYF151W SunLED	LED YELLOW CLEAR 2SMD R/A	15915
XZM2CYK55W-3 SunLED	LED YELLOW CLEAR 2SMD	7150
XZMER68W-3 SunLED	LED RED CLEAR 0402 SMD	4140
XSUGY47M SunLED	LED GRN/YELLOW DIFFUSED RECT T/H	0
XZM2CRK53W-1 SunLED	LED RED CLEAR 2SMD	29191
XLUY11D SunLED	LED YELLOW DIFFUSED T-1 T/H	739
XZCBD81FS SunLED	LED BLUE CLEAR 2SMD R/A	8870
XZM2DG81FS SunLED	LED GREEN CLEAR 2SMD R/A	5990
XLMDK11W SunLED	LED RED CLEAR T-1 T/H	0
XLMYK11D SunLED	LED YELLOW DIFFUSED T-1 T/H	0
XZMDKCBD55W-4 SunLED	LED BLUE/RED CLEAR 2SMD	8653
XSVG43MB SunLED	LED GREEN DIFFUSED ICE CUBE T/H	0
XZMRVG67WTR SunLED	LED GRN/RED CLEAR 2SMD R/A	8998
XLM2MOK01W SunLED	LED ORANGE CLEAR 10MM T/H	0
XZM2CYK74W SunLED	LED YELLOW CLEAR 2SMD R/A	0

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