MM1Z5B1
ST (Semtech Electronics)
Needs validationlow risk
A 5.1V, 500mW Zener diode in the same SOD-123 package with identical key electrical parameters. A likely pin-compatible replacement.
Best Alternatives to MM1Z5V1
MM1Z5V1 is a 5.1V, 500mW Zener diode in a common SOD-123 package. Several pin-compatible and functional alternatives are available from major manufacturers, simplifying sourcing and design.
AI replacement insight
Electrical risklow
Key parameters are well-matched by top candidates. Check tolerance.
Package risklow
SOD-123 is a standard package, ensuring mechanical compatibility.
Sourcing risklow
This is a common Zener diode type with many available suppliers.
Can it be replaced directly?
Direct replacement for MM1Z5V1 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
MM1Z5B1 is the strongest candidate, matching key electricals and package. MMSZ5231B is a widely available industry standard part that is also a good option.
Main risk
The primary risk is a mismatch in Zener voltage tolerance, which is a critical but often subtle parameter. A secondary risk is a difference in dynamic impedance (Zzt).
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | MM1Z5V1 | MM1Z5B1 | MMSZ5231B | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-123 | SOD-123 | - | SOD-123 — Package matches, ensuring form and fit. | |
| Voltage | 5.1V | 5.1V | - | 5.1V — Zener voltage is identical. | |
| Power | 500mW | 500mW | - | 500mW — Power rating is identical. | |
| Current | 5mA | 5mA | - | 20mA — Test current differs, may affect dynamic impedance. Verify datasheet. | |
| Tolerance | Not specified | ±2% | - | ±2% — Candidate tolerance is ±2%; target tolerance must be verified. |
Application & sourcing insights
Questions & answers
Verified drop-in options for MM1Z5V1 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.