LED Indication - Discrete

Part Number	Description / PDF	Quantity
3UGC-S Califia Lighting (Bivar)	LED GREEN CLEAR T-1 T/H	0
CMDA5DR7D1S Visual Communications Company, LLC	LED RED DIFFUSED 0805 SMD	0
QBLP670D-IB QT Brightek	LED BLUE CLEAR 2PLCC SMD	1515
IN-S42BT5G Inolux	TOP VIEW / 0402 / 1.0X0.5X0.4	30910
HLMP-1540 Broadcom	LED GREEN CLEAR T-1 T/H	34722
XZMDKVG54W-4 SunLED	LED GREEN/RED CLEAR CHIP SMD	238902
SMF-2432SYC-TR Lumex, Inc.	LED YELLOW CLEAR SMD R/A	1173
IN-S63AS5YG Inolux	LED YLW/GRN CLEAR 0603 SMD R/A	2
AM2520SECK09 Kingbright	LED ORANGE CLEAR SMD	14219
CSL0701DT5 ROHM Semiconductor	LED ORANGE CLEAR SMD	693
SM1206UWC Califia Lighting (Bivar)	LED WHITE DIFFUSED 1206 SMD	1993
151054YS04500 Würth Elektronik Midcom	LED YELLOW CLEAR T/H	1939
SMLZ14EGTT86A ROHM Semiconductor	LED BLUE-GREEN CLEAR 1411 SMD	2000
VLMW1502-GS08 Vishay / Semiconductor - Opto Division	LED WHITE DIFFUSED 0402 SMD	0
150505M173300 Würth Elektronik Midcom	LED RGB CLEAR 6PLCC SMD	5596
XZMYKVG56W SunLED	LED GREEN/YELLOW CLEAR 2SMD R/A	24875
SM1206AC Califia Lighting (Bivar)	LED AMBER CLEAR 1206 SMD	0
5990040007F Dialight	LED YELLOW 0603 SMD	8462
QTLP652C4TR Everlight Electronics	LED GREEN CLEAR 1206 SMD	12404
LTST-S115KRKGKT Lite-On, Inc.	LED GREEN/RED CLEAR SMD	6535

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