What risks should I check before replacing MMSZ5244BT1G?

Verify the Zener voltage (Vz), power dissipation, and package (SOD-123). Also check secondary parameters like Zener impedance (Zzt) and tolerance.

MMSZ5244BT1G Alternatives, Datasheet & Cross Reference | onsemi

MMSZ5244BT1G is a 14V, 500mW Zener diode in a SOD-123 package from onsemi. Finding a substitute requires matching voltage, power, and package footprint.

AI replacement insight

Electrical riskmedium

Using a part with incorrect Zener voltage or impedance can affect regulation performance.

Package risklow

Ensure the substitute has the same SOD-123 footprint and land pattern compatibility.

Can it be replaced directly?

Yes, LMSZ5244BT1G is a potential pin-to-pin replacement, but requires engineering review before use.

Best replacement path

Start with Datasheet verified or Strong match candidates for MMSZ5244BT1G, then review parametric alternatives for package and electrical fit.

Main risk

The main risk is using a part with a different Zener voltage, which can cause circuit malfunction.

Recommended alternatives

A potential pin-compatible alternative with matching key electrical parameters and package.

View details

Alternative comparison matrix

Feature / factor	MMSZ5244BT1G	LMSZ5244BT1G	MM1W15	Compatibility / risk
Package	SOD-123	SOD-123	SOD-123	SOD-123 — Same package and pin count.; MM1W15: Package matches.
Voltage	14.0V	14.0V	15.0V	14.0V / 15.0V — Nominal Zener voltage matches.; MM1W15: Slightly higher Zener voltage.
Power	0.5W	0.5W	1.0W	0.5W / 1.0W — Power dissipation matches.; MM1W15: Higher power rating.
Current	9.0mA	9.0mA	17mA	9.0mA / 17mA — Test current matches.; MM1W15: Test current differs.
Manufacturer	onsemi	LRC	-	LRC — Cross-vendor alternative.

Application & sourcing insights

Questions & answers

Verified drop-in options for MMSZ5244BT1G are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.