Is there a pin-compatible replacement for MM3Z15VT1G?

LM3Z15VT1G is pin-compatible in the same SOD-323 package. However, it is not a direct drop-in due to its lower power handling capability. No fully equivalent pin-compatible part was found.

What risks should I check before replacing MM3Z15VT1G?

First, verify the power dissipation in your circuit is safely below the candidate's rating (e.g., 200mW for LM3Z15VT1G). Second, if considering a part like 1SMA5930BT3G, confirm you can accommodate a different package (SMA) on your PCB.

MM3Z15VT1G Alternatives, Datasheet & Cross Reference | onsemi

Finding a substitute for the MM3Z15VT1G Zener diode involves matching the 15V Zener voltage, 300mW power rating, and SOD-323 package. Key alternatives may have different power ratings or packages, requiring careful review.

AI replacement insight

Electrical riskmedium

Candidates may have lower power ratings or slightly different voltages.

Package riskhigh

Some functional alternatives are not drop-in compatible and require PCB changes.

Sourcing risklow

Multiple manufacturers produce similar Zener diodes.

Can it be replaced directly?

No direct drop-in replacement has been identified. LM3Z15VT1G is form-fit compatible but has a lower power rating (200mW vs 300mW) that must be verified.

Best replacement path

The closest match is LM3Z15VT1G, which shares the package and voltage but has a lower power rating. For new designs, 1SMA5930BT3G offers higher power but in a different package.

Main risk

The main risks are package incompatibility, requiring a board redesign, or lower power ratings, which could lead to thermal failure.

Recommended alternatives

A potential alternative in the same SOD-323 package and 15V Zener voltage, but with a lower power rating.

View details

Alternative comparison matrix

Feature / factor	MM3Z15VT1G	LM3Z15VT1G	1SMA5930BT3G	Compatibility / risk
Package	SOD-323	SOD-323	SMA (DO-214AC)	SOD-323 / SMA (DO-214AC) — Form and fit are matched.; 1SMA5930BT3G: Not a drop-in replacement, requires PCB redesign.
Voltage	15.0V	15.0V	16.0V	15.0V / 16.0V — Nominal Zener voltage is identical.; 1SMA5930BT3G: Zener voltage is 1V higher.
Power	300mW	200mW	1.5W	200mW / 1.5W — Candidate has 33% lower power handling.; 1SMA5930BT3G: Significantly higher power rating.
Manufacturer	onsemi	LRC	onsemi	LRC / onsemi — Cross-vendor alternative.; 1SMA5930BT3G: Same manufacturer.

Application & sourcing insights

Questions & answers

LM3Z15VT1G is a strong candidate with the same 15V rating and SOD-323 package, but its 200mW power rating is lower than the original's 300mW. This requires engineering validation.