LED Indication - Discrete

Part Number	Description / PDF	Quantity
L150B-SGC American Opto Plus LED Corp.	3.2X1.6X1.1MM SMD LED Y-GREEN	88
APF3236SEEZGKQBKC Kingbright	LED RGB CLEAR 6SMD	65569
SML-E12Y8WT86 ROHM Semiconductor	LED YELLOW DIFFUSED 0603 SMD	19902
5988050102F Dialight	LED YELLOW CLEAR 0603 SMD	0
HSMF-C164 Broadcom	LED BLUE/RED DIFFUSED 0603 SMD	2615
HLMP-6820 Broadcom	LED GREEN DIFF AXIAL T/H AXIAL	7609
SSL-LX20R6YD Lumex, Inc.	LED YELLOW DIFF 6CHIP JUMBO T/H	10
VLDS1535R-08 Vishay / Semiconductor - Opto Division	LED RED CLEAR 2SMD BOTTOM ENTRY	397
HLMP-1521 Broadcom	LED GREEN CLEAR T-1 T/H	42415
5973007607F Dialight	LED RED CLEAR 1206 SMD	0
VLMKE3401-GS08 Vishay / Semiconductor - Opto Division	LED RED/YELLOW CLEAR 4PLCC SMD	7393
150141YS73100 Würth Elektronik Midcom	LED YELLOW CLEAR 3528 SMD	4332
SML-H1505SIC-TR Lumex, Inc.	LED RED CLEAR SMD DOME LED	750
SLR-342YYT32 ROHM Semiconductor	LED YELLOW DIFFUSED T-1 T/H	1571
HSMY-C680 Broadcom	LED YELLOW CLEAR CHIP SMD R/A	0
NTE30160 NTE Electronics, Inc.	LED 10MM RGB COMMON CATH	2545
HSMG-A100-L02J1 Broadcom	LED YELLOW/GREEN CLEAR 2PLCC SMD	46500
SM1206HC-IL Califia Lighting (Bivar)	LED RED CLEAR 1206 SMD	0
XZMOK56W-1 SunLED	LED ORANGE CLEAR 2SMD R/A	0
5990291007F Dialight	LED BLUE 1206 SMD	11358

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