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Best Alternatives to MMSZ5254BT1G

Package: SOD-123onsemiDiodes - Zener - SingleSeries: MMSZ52xxxT1GPackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - Zener (Nom) (Vz): 27 VTolerance: ±5%Current - Reverse Leakage @ Vr: 100 nA @ 21 V

Finding a substitute for the onsemi MMSZ5254BT1G requires matching its 27V Zener voltage, 500mW power, and SOD-123 package. Key electrical parameters like Zener impedance must be carefully reviewed.

AI replacement insight

Electrical riskmedium

Zener impedance mismatch can affect regulation performance.

Package risklow

SOD-123 is a common package with standard dimensions.

Can it be replaced directly?

No direct, verified pin-to-pin replacement is available. Candidates like MDD's BZT52C27 require datasheet verification for Zener impedance.

Best replacement path

Find a part with matching 27V voltage, 500mW power, and SOD-123 package, while verifying Zener impedance (Zzt) is close to 41Ω.

Main risk

The main risk is degraded voltage regulation due to a higher or unknown Zener impedance in an alternative part.

Recommended alternatives

2
BZT52C27 package
BZT52C27

MDD

Needs validationmedium risk

Matches package, voltage, and power, but requires verification of Zener impedance for functional equivalence.

View details

Alternative comparison matrix

Feature / factorMMSZ5254BT1GBZT52C27MM1Z27Alt 3Compatibility / risk
PackageSOD-123SOD-123SOD-123SOD-123 — Package matches, enabling form-fit compatibility.; MM1Z27: Package matches, enabling form-fit compatibility.
Voltage27.0V27.0V27.0V27.0V — Nominal Zener voltage matches.; MM1Z27: Nominal Zener voltage matches.
Power500mW500mW500mW500mW — Power rating matches.; MM1Z27: Power rating matches.
Zener Impedance41ΩMissing70ΩMissing / 70Ω — Zzt is not specified in datasheet; critical for regulation performance.; MM1Z27: Higher impedance will result in poorer voltage regulation.
Tolerance±5%±5% (Typical)-±5% (Typical) — Tolerance is assumed from part series, but not guaranteed in datasheet.

Application & sourcing insights

Questions & answers

The MDD BZT52C27 is a potential form-fit-function alternative with the same 27V voltage, 500mW power, and SOD-123 package. However, its Zener impedance is not specified and must be verified before use.