LTST-C191KSKT Lite-On LED (LEDs Chip) In Stock

Name: LTST-C191KSKT
Brand: Lite-On
SKU: LTST-C191KSKT
Availability: InStock

LTST-C191KSKT is a yellow SMD LED by Lite-On emitting at 597 nm with 28 mcd luminous intensity in a 0603 (1608) package. Key specs: 30 mA maximum forward current, 2.4 V maximum forward voltage, 130-degree viewing angle, IC-compatible. Available from stock with worldwide shipping.

ACTIVELEDVerified Jun 2026

Package / Visual Reference

LTST-C191KSKTLEDs Chip

Quick Facts

Manufacturer: Lite-On
Package: LEDs Chip
Pin Count: 2
Lifecycle: ACTIVE
Datasheet: LTST-C191KSKT Datasheet PDF
Category: LED
Price: From $0.0188(MOQ 1)
Temp Range: -55.0°C to 85.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of LTST-C191KSKT?

597 nm yellow emission with 28 mcd luminous intensity provides clear visual indication at 30 mA drive current
0603 (1608) SMD rectangular lens package enables ultra-compact LED placement on high-density PCBs
130-degree wide viewing angle ensures LED indicators remain visible from broad observation angles in panel designs
IC-compatible drive levels allow direct GPIO or logic-level transistor drive without external driver ICs
Pb-free, RoHS-compliant JESD-609 e3 rated for lead-free reflow solder assembly

What is LTST-C191KSKT used for?

The Lite-On LTST-C191KSKT yellow 0603 LED is used as a status indicator, activity light, or visual alert element on PCBs in consumer electronics, networking equipment, and industrial control panels where compact size and yellow color coding are required. Its 597 nm wavelength and 28 mcd output at 30 mA make it visible in typical indoor lighting conditions, suitable for charging status indicators on battery-powered devices and link/activity LEDs on Ethernet switches. The wide 130-degree viewing angle also makes it effective in multi-user interface panels and handheld device displays where viewing direction varies.

What are the specifications of LTST-C191KSKT?

Pbfree Code	Yes
Factory Lead Time	16Weeks
YTEOL	7
Additional Feature	IC COMPATIBLE
Color	YELLOW
Color@Wavelength	Yellow
Configuration	SINGLE
Forward Current-Max	0.03A
Forward Voltage-Max	2.4V
JESD-609 Code	e3
Lens Type	WATER CLEAR
Luminous Intensity-Nom	104.0mcd
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	588nm
Reverse Voltage-Max	5V
Shape	RECTANGULAR
Size	1.1mm
Surface Mount	YES
Terminal Finish	Tin (Sn)
Terminal Pitch	1.5mm
Viewing Angle	130deg
Package	LEDs Chip

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
HTS Code	8541.40.20.00
Country of Origin	Mainland China, Thailand

Where can I find the LTST-C191KSKT datasheet?

LTST-C191KSKT Datasheet Download

Official datasheet from Lite-On

What are equivalent replacements for LTST-C191KSKT?

Compatible alternatives and drop-in replacements for LTST-C191KSKT:

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Frequently Asked Questions

At what wavelength does LTST-C191KSKT emit and how bright is it at rated current?

The LTST-C191KSKT emits yellow light at a dominant wavelength of 597 nm and produces a luminous intensity of 28 mcd at the rated 30 mA forward current. This brightness level is adequate for use as a status indicator in indoor environments with ambient illuminance up to approximately 1000 lux, typical of office and industrial lighting conditions.

How can LTST-C191KSKT be driven directly from a 3.3 V microcontroller GPIO pin?

With a maximum forward voltage of 2.4 V and maximum forward current of 30 mA, LTST-C191KSKT can be driven via a current-limiting resistor from a 3.3 V GPIO. A 33 Ω resistor limits current to approximately (3.3 V − 2.0 V) / 33 Ω ≈ 39 mA at typical forward voltage, so a 47 Ω to 68 Ω resistor is recommended to keep drive current safely below the 30 mA maximum for most GPIO output configurations.

What is the viewing angle of LTST-C191KSKT and how does it affect PCB indicator placement?

The LTST-C191KSKT has a 130-degree half-angle viewing cone, providing wide spatial light distribution suitable for panel indicators viewed at oblique angles up to 65° from the optical axis. This wide angle reduces the need for precise LED alignment in light-guide or diffuser-panel applications on network switches, appliances, and wearable devices.

Is LTST-C191KSKT compatible with standard 0603 SMT PCB footprints and reflow solder assembly?

Yes, the LTST-C191KSKT uses a standard 1608 (0603 imperial) SMD package with a rectangular lens profile, fitting the IPC-7351 0603 footprint used by most EDA tools. It is rated Pb-free (JESD-609 e3) and qualified for lead-free SAC305 reflow solder processes at peak temperatures up to 260 °C, compatible with modern automated SMT production lines.

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AvailabilityIn Stock

Reference Price (USD)

From $0.0188

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$0.5000	$0.50
100+	$0.3800	$38.00
500+	$0.0594	$29.68
850+	$0.0300	$25.50
3000+	$0.0225	$67.50
7500+	$0.0188	$141.00

pcs

Unit price: $0.5000 · Total: $0.50

In Stock · 24h Response · Worldwide Shipping

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

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