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Best Alternatives to MMSZ4706

Package: SOD-123onsemiDiodes - Zener - SingleSeries: -Package: Tape & Reel (TR)Voltage - Zener (Nom) (Vz): 19 VTolerance: ±5%Current - Reverse Leakage @ Vr: 50 nA @ 14.4 V

MMSZ4706 is an obsolete 19V, 500mW Zener diode in a SOD-123 package. While no exact replacement exists, several strong alternatives like MMSZ5250BT1G offer a pin-compatible solution with a slightly different Zener voltage that requires engineering review.

AI replacement insight

Electrical riskmedium

Zener voltage mismatch requires circuit tolerance analysis.

Package risklow

Multiple candidates are available in the same SOD-123 package.

Can it be replaced directly?

Direct replacement for MMSZ4706 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

MMSZ5250BT1G from onsemi is the most promising alternative, offering the same package and power with a Zener voltage of 20V.

Main risk

The primary risk is the difference in Zener voltage (Vz), which can affect the regulation point and downstream components in the circuit.

Recommended alternatives

2
MMSZ5250BT1G package
MMSZ5250BT1G

onsemi

Needs validationlow risk

A strong alternative from the same manufacturer with a slightly higher Zener voltage (20V).

View details

Alternative comparison matrix

Feature / factorMMSZ4706MMSZ5250BT1GLMSZ5250BT1GAlt 3Compatibility / risk
ApplicationZenerZenerZenerZener — Candidate is a Zener diode, matching the target's function.; LMSZ5250BT1G: Matches target function.
PackageSOD-123SOD-123SOD-123SOD-123 — Same package ensures form and fit compatibility.; LMSZ5250BT1G: Same package ensures form/fit.
Voltage19V20V20V20V — Slightly higher Zener voltage, requires circuit tolerance check.; LMSZ5250BT1G: Slightly higher Zener voltage, requires circuit tolerance check.
Power500mW500mW500mW500mW — Identical power dissipation rating.; LMSZ5250BT1G: Identical power rating.
Temperature-55°C to +150°C-55°C to +150°C--55°C to +150°C — Same operating temperature range.

Application & sourcing insights

Questions & answers

Verified drop-in options for MMSZ4706 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.