Is there a pin-compatible replacement for LTST-C191TGKT?

Currently, no pin-to-pin compatible replacement has been verified. Any potential substitute requires datasheet review for package dimensions and pinout.

What risks should I check before replacing LTST-C191TGKT?

Key risks include: 1) Electrical mismatch (forward voltage differences requiring resistor changes), 2) Optical mismatch (changes in brightness, color wavelength, and viewing angle), and 3) Mechanical mismatch (different package size or footprint).

LTST-C191TGKT Alternatives, Datasheet & Cross Reference | LITEON

Finding a replacement for the LTST-C191TGKT green LED requires careful matching of its 520-535nm wavelength, 2.8-3.6V forward voltage, and compact package. Alternatives may differ in brightness and color shade.

AI replacement insight

Electrical riskhigh

Forward voltage mismatch requires circuit redesign.

Package riskmedium

Different package footprint requires layout verification.

Sourcing risklow

Target part is currently Active.

Can it be replaced directly?

No direct replacement found. All candidates have significant electrical, optical, or mechanical differences.

Best replacement path

Parametric search for green LEDs with 525nm wavelength, ~3.2V Vf, and 0603 or similar package.

Main risk

Electrical incompatibility due to forward voltage differences is the primary risk, potentially damaging the LED or driver circuit if not addressed.

Recommended alternatives

A functional but weaker green LED; requires circuit and layout changes.

View details

Alternative comparison matrix

Feature / factor	LTST-C191TGKT	NCD2012C1	Compatibility / risk
Color	Green	Green	Green — Color family matches.
Wavelength	520-535 nm	572 nm	572 nm — Noticeably different shade (yellow-green vs. true green).
Voltage	2.8 - 3.6 V	2.0 V	2.0 V — Requires circuit modification (e.g., series resistor change).
Luminous Intensity	71 - 450 mcd	45 mcd	45 mcd — Significantly dimmer than target's minimum brightness.
Package	SMD (C191)	SMD (2.0x1.2mm)	SMD (2.0x1.2mm) — Different footprint and likely height; requires layout check.

Application & sourcing insights

Questions & answers

No direct drop-in replacement has been identified. NCD2012C1 is a functional alternative but is dimmer, has a different shade of green, and requires circuit changes due to a lower forward voltage.