LTST-C191TGKT Lite-On LED (LED Moulded) In Stock

Name: LTST-C191TGKT
Brand: Lite-On
SKU: LTST-C191TGKT
Availability: InStock

Lite-On LTST-C191TGKT is a single green SMD LED in a compact plastic 0402-style moulded package, emitting blue-green light with a 3.6 V maximum forward voltage and 20 mA maximum forward current. IC-compatible drive levels allow direct GPIO connection without a buffer, making it well suited for status indicators on microcontroller boards. Available RoHS-compliant with JEDEC e3 moisture classification for lead-free SMT assembly.

ACTIVELEDVerified Jun 2026

Package / Visual Reference

LTST-C191TGKTLED Moulded

Quick Facts

Manufacturer: Lite-On
Package: LED Moulded
Pin Count: 2
Lifecycle: ACTIVE
Datasheet: LTST-C191TGKT Datasheet PDF
Category: LED
Price: From $0.0362(MOQ 1)
Temp Range: -20.0°C to 80.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of LTST-C191TGKT?

Green (blue-green wavelength) single LED with 3.6 V max forward voltage and 20 mA max forward current for direct IC GPIO-level drive
IC-compatible design enabling direct connection to 3.3 V and 5 V microcontroller output pins without additional buffer circuitry
Compact moulded SMD package optimized for high-density status indicator placement on PCBs with standard reflow soldering
RoHS-compliant, JEDEC e3 moisture-rated with Pb-free construction for lead-free SMT production compatibility

What is LTST-C191TGKT used for?

The Lite-On LTST-C191TGKT green SMD LED is used as a status indicator on microcontroller development boards, consumer electronics panels, and industrial HMI interfaces where a small footprint, low forward voltage, and IC-compatible drive are required. Its 20 mA maximum forward current and direct GPIO driveability make it a go-to choice for power-on, link, and activity indicators in networking equipment, wearables, and embedded systems. The moulded package suits high-volume automated SMT assembly on compact PCBs where through-hole LEDs would consume excessive board space.

What are the specifications of LTST-C191TGKT?

Pbfree Code	Yes
Factory Lead Time	16Weeks
YTEOL	7
Additional Feature	IC COMPATIBLE
Color	GREEN
Color@Wavelength	Blue-Green
Configuration	SINGLE
Forward Current-Max	0.02A
Forward Voltage-Max	3.6V
JESD-609 Code	e3
Lens Type	WATER CLEAR
Luminous Intensity-Min	130cd
Luminous Intensity-Nom	260.5mcd
Mounting Feature	SURFACE MOUNT
Number of Functions	1
Optoelectronic Device Type	SINGLE COLOR LED
Overall Height	0.55mm
Packing Method	TR, 7 INCH
Peak Wavelength	530nm
Reverse Voltage-Max	5V
Shape	RECTANGULAR
Size	1.1mm
Surface Mount	YES
Terminal Finish	Pure Tin (Sn)
Terminal Pitch	1.5mm
Viewing Angle	130deg
Package	LED Moulded

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8541.40.20.00

Where can I find the LTST-C191TGKT datasheet?

LTST-C191TGKT Datasheet Download

Official datasheet from Lite-On

What are equivalent replacements for LTST-C191TGKT?

Compatible alternatives and drop-in replacements for LTST-C191TGKT:

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Frequently Asked Questions

Can the LTST-C191TGKT be driven directly from a 3.3 V microcontroller GPIO pin without a transistor buffer?

Yes, the LTST-C191TGKT is IC-compatible, meaning its 20 mA maximum forward current and 3.6 V maximum forward voltage allow direct connection to 3.3 V GPIO output pins through a current-limiting resistor. A 68 ohm to 100 ohm series resistor limits current to approximately 5-10 mA, producing visible green illumination without exceeding the GPIO source current limit typical of most ARM Cortex-M and AVR microcontrollers rated at 8-16 mA per pin.

At what forward current does the LTST-C191TGKT produce its rated luminous intensity and how does dimming affect it?

The LTST-C191TGKT produces rated luminous intensity at its specified forward current up to 20 mA maximum. Pulse-width modulation (PWM) dimming at frequencies above 100 Hz with duty cycles from 5% to 100% effectively reduces perceived brightness without color shift, since blue-green LEDs maintain consistent chromaticity across a wide current range from 1 mA to 20 mA. This makes it suitable for PWM-dimmed indicators in battery-powered devices needing adjustable brightness control.

What SMD package size does the LTST-C191TGKT use and how does it compare to through-hole LED alternatives for board space?

The LTST-C191TGKT uses a compact moulded SMD package suitable for standard pick-and-place assembly, occupying significantly less PCB area than a standard 3 mm or 5 mm through-hole LED which requires a 1.0 mm to 1.5 mm hole and at least 2.54 mm lead pitch. The SMD format eliminates drilling costs and allows placement on either side of the PCB, enabling higher component density on boards where indicators must be positioned adjacent to the ICs they monitor at 3.3 V or 5 V logic levels.

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AvailabilityIn Stock

Reference Price (USD)

From $0.0362

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$1.0000	$1.00
10+	$0.2280	$2.28
100+	$0.1080	$10.80
500+	$0.1030	$51.50
15000+	$0.0549	$823.50
20000+	$0.0362	$724.00

pcs

Unit price: $1.0000 · Total: $1.00

In Stock · 24h Response · Worldwide Shipping

Direct Contact

WhatsApp Inquiry Email RFQ

Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”

Rajesh Patel

Procurement Manager, VoltEdge Energy, India

LTST-C191TGKT Lite-On LED (LED Moulded) In Stock

What are the key features of LTST-C191TGKT?

What is LTST-C191TGKT used for?

What are the specifications of LTST-C191TGKT?

Compliance & Regulatory

Where can I find the LTST-C191TGKT datasheet?

What are equivalent replacements for LTST-C191TGKT?

Frequently Asked Questions

Can the LTST-C191TGKT be driven directly from a 3.3 V microcontroller GPIO pin without a transistor buffer?

At what forward current does the LTST-C191TGKT produce its rated luminous intensity and how does dimming affect it?

What SMD package size does the LTST-C191TGKT use and how does it compare to through-hole LED alternatives for board space?

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