Is there a pin-compatible replacement for LTST-C191KRKT?

No pin-compatible replacements have been verified. While other LEDs exist in the same 0603 package, differences in electrical characteristics like forward voltage or luminous intensity require engineering review before substitution.

What risks should I check before replacing LTST-C191KRKT?

Key risks include: 1) Package mismatch, ensure the replacement is 0603. 2) Electrical mismatch, verify forward voltage and current are compatible with your driver circuit. 3) Color and brightness, ensure the replacement's wavelength and luminous intensity meet your design's requirements.

LTST-C191KRKT Alternatives, Datasheet & Cross Reference | LITEON

LTST-C191KRKT is a popular 0603 red SMD LED from LITEON. When seeking alternatives, key considerations include matching the 0603 package, 2.0V forward voltage, and red color for functional and visual consistency.

AI replacement insight

Electrical riskmedium

Forward voltage can vary between colors and manufacturers, potentially requiring driver circuit changes.

Package risklow

0603 is a standard package, but land pattern should always be confirmed.

Sourcing risklow

The target part is active and widely available. Alternatives may be generic or have less reliable supply chains.

Can it be replaced directly?

No direct, drop-in replacement for LTST-C191KRKT has been identified. All potential alternatives require engineering review.

Best replacement path

Explore other color variants within the LITEON LTST-C191 family if color is flexible, or evaluate generic 0603 red LEDs after careful datasheet verification.

Main risk

The main risk is functional failure due to color or electrical mismatch. Using a non-red LED or one with a different forward voltage can impact circuit performance and visual indication.

Recommended alternatives

A green LED in the same 0603 package and product family, suitable for applications where color can be changed.

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Alternative comparison matrix

Feature / factor	LTST-C191KRKT	LTST-C191KGKT	LTST-C191KSKT	LTST-C191TBKT	Compatibility / risk
Package	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric) — Package size matches.; LTST-C191KSKT: Package size matches.; LTST-C191TBKT: Package size matches.
Color	Red	Green	Yellow	Blue	Green / Yellow / Blue — Candidate is a different color.; LTST-C191KSKT: Candidate is a different color.; LTST-C191TBKT: Candidate is a different color.
Voltage V	2.0V	1.9V	1.8V	2.8V	1.9V / 1.8V / 2.8V — Slightly lower forward voltage.; LTST-C191KSKT: Lower forward voltage.; LTST-C191TBKT: Significantly higher forward voltage requires circuit review.
Current A	20mA	20mA	20mA	20mA	20mA — Test current matches.; LTST-C191KSKT: Test current matches (catalog spec of 80mA is likely peak).; LTST-C191TBKT: Test current matches.

Application & sourcing insights

Questions & answers

There are no verified pin-to-pin replacements. The closest options are other color variants in the LITEON LTST-C191 series, like the green LTST-C191KGKT, if color is not critical. For a red alternative, generic part MP006843 is claimed to be similar but requires full verification.