Is there a pin-compatible replacement for DY-204UYGD-H38-A3?

While several candidates like NFD3401HGD share the same 3mm T-1 package and 2-pin layout, they are classified as form-fit-function alternatives. True pin-to-pin compatibility requires verifying the specific application's tolerance for minor differences in viewing angle and luminous intensity.

What risks should I check before replacing DY-204UYGD-H38-A3?

When replacing DY-204UYGD-H38-A3, check three main risks: 1) Viewing Angle: some alternatives have a narrower angle (e.g., 30° vs 50°), affecting light dispersion. 2) Forward Voltage: ensure the replacement's Vf is compatible with your driver circuit. 3) Luminous Intensity: verify the brightness meets your application's requirements.

DY-204UYGD-H38-A3 Alternatives, Datasheet & Cross Reference | TONYU

Find suitable replacements for the TONYU DY-204UYGD-H38-A3, a 3mm T-1 yellow-green LED. Our analysis identifies several alternatives, highlighting key parametric differences like viewing angle and forward voltage to ensure a successful substitution.

AI replacement insight

Package risklow

All viable candidates use a compatible 3mm through-hole package.

Electrical riskmedium

Some candidates have different forward voltage ranges, requiring circuit review.

Can it be replaced directly?

No guaranteed drop-in replacement has been verified. NFD3401HGD is a very strong candidate but should be validated in the application before large-scale use.

Best replacement path

Start with NFD3401HGD due to its close parametric match. If unavailable, consider XL-304SYGC but be prepared to validate the narrower viewing angle.

Main risk

The primary risk is a mismatch in optical characteristics, specifically the viewing angle, which could alter the visual appearance or user interface experience.

Recommended alternatives

A strong alternative with matching package, color, and forward voltage; viewing angle is similar.

View details

Alternative comparison matrix

Feature / factor	DY-204UYGD-H38-A3	NFD3401HGD	XL-304SYGC	Compatibility / risk
Package	3mm (T-1)	3mm (T-1)	3mm (F3)	3mm (T-1) / 3mm (F3) — Package size and type match.; XL-304SYGC: Package is a compatible 3mm through-hole type.
Application	25 - 400 mcd	50 - 150 mcd	White Diffused	50 - 150 mcd / White Diffused — Luminous intensity range is within target's range.; XL-304SYGC: Lens color differs but both are diffused.
Voltage	1.8V - 2.4V	1.8V - 2.4V	2.2V typ	1.8V - 2.4V / 2.2V typ — Forward voltage range is identical.; XL-304SYGC: Typical forward voltage is within target's range.

Application & sourcing insights

Questions & answers

The Foshan NationStar NFD3401HGD is the best alternative for DY-204UYGD-H38-A3. It shares the same package, pin count, color, and forward voltage, with a very similar viewing angle, making it a strong candidate for replacement.