LED Indication - Discrete

Part Number	Description / PDF	Quantity
MV5354A Everlight Electronics	LED YELLOW DIFFUSED T-1 3/4 T/H	0
MV5753 Everlight Electronics	LED RED DIFFUSED T-1 3/4 T/H	34532
3474AN-R7DB-AHJB-PR-MS Everlight Electronics	LED RED DIFFUSED RADIAL LEAD T/H	2242
HLMP3301 Everlight Electronics	LED RED DIFFUSED T-1 3/4 T/H	0
QTLP601CEBTR Everlight Electronics	LED BLUE CLEAR 0603 SMD	3187
MV5374C Everlight Electronics	LED YELLOW DIFFUSED T-1 T/H	1509
61-238/QK2C-B45562FAGB2/ET Everlight Electronics	LED COOL WHITE DIFF 6PLCC SMD	1513
EAST1615RGA1 Everlight Electronics	LED GREEN/RED CLEAR 4SMD	5559
EAST10052WA0 Everlight Electronics	LED WHITE DIFFUSED 2SMD	1856
MV3350 Everlight Electronics	LED YELLOW CLEAR T-1 3/4 T/H	7581
HLMP1790 Everlight Electronics	LED GREEN DIFFUSED T-1 T/H	878
HLMP1340 Everlight Electronics	LED RED CLEAR T-1 T/H	0
19-213/R6C-AP1Q2B/3T Everlight Electronics	LED RED CLEAR 2SMD	20275
EAST20128GA6 Everlight Electronics	LED YELLOW/GREEN CLEAR 2SMD	1810
HLMP3950A Everlight Electronics	LED GREEN CLEAR 5MM ROUND T/H	32100
334-15/F1C5-1RTA Everlight Electronics	LED COOL WHITE CLEAR T-1 3/4 T/H	3511
MV50154 Everlight Electronics	LED RED DIFF BULLET T-1 3/4 T/H	6604
EAST1616RGBB8 Everlight Electronics	RGB SMD B PART	3687
95-21SUBC/S400-A4/TR10 Everlight Electronics	LED BLUE CLEAR Z-BEND SMD	4406
334-15/X2C1-1WYB Everlight Electronics	5MM, WHITE, HIG H INTENSITY, WAR	26

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