MMSZ5242B-E3-08
Vishay General Semiconductor - Diodes Division
Needs validationlow risk
A pin-compatible 12V, 500mW Zener diode in a SOD-123 package from Vishay, matching all key electrical parameters.
Best Alternatives to MMSZ5242B-7-F
MMSZ5242B-7-F is a widely used 12V, 500mW Zener diode in a compact SOD-123 package. Due to its adherence to JEDEC standards, numerous pin-compatible alternatives from various manufacturers are available, offering flexibility in sourcing.
AI replacement insight
Electrical risklow
Key parameters are standardized across manufacturers.
Package risklow
SOD-123 is a standard surface-mount package.
Sourcing risklow
This is a high-volume, multi-source component.
Can it be replaced directly?
Direct replacement for MMSZ5242B-7-F should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Use a cross-referenced part from a major manufacturer like onsemi (MMSZ5242BT1G) or Vishay (MMSZ5242B-E3-08) for a direct replacement.
Main risk
The primary risk is minor parametric variation between manufacturers, which is typically low for this common Zener diode. Always check the datasheet.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | MMSZ5242B-7-F | MMSZ5242B-E3-08 | MMSZ5242BT1G | MMSZ5242B-TP | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD123 | SOD-123 | SOD-123 | SOD-123 | SOD-123 / SOD123 — Package matches.; MMSZ5242BT1G: Package matches.; MMSZ5242B-TP: Package matches.; BZT52C12-7-F: Package matches. |
| Voltage | 12 V | 12 V | 12 V | 12 V | 12 V — Zener voltage matches.; MMSZ5242BT1G: Zener voltage matches.; MMSZ5242B-TP: Zener voltage matches.; BZT52C12-7-F: Zener voltage matches. |
| Power | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW — Power rating matches.; MMSZ5242BT1G: Power rating matches.; MMSZ5242B-TP: Power rating matches. |
| Impedance | 30 Ohm | 30 Ohms | 30 Ohms | - | 30 Ohms / 25 Ohm — Zener impedance matches.; MMSZ5242BT1G: Zener impedance matches.; BZT52C12-7-F: Lower impedance is generally better but is specified at a different test current. |
| Manufacturer | Diodes Incorporated | Vishay | onsemi | MCC | Vishay / onsemi / MCC — Cross-vendor alternative from a major manufacturer.; MMSZ5242BT1G: Cross-vendor alternative from a major manufacturer.; MMSZ5242B-TP: Cross-vendor alternative, often a cost-effective choice. |
| Test Current | 20 mA | - | - | - | 5 mA — Zener voltage is specified at a different test current, may affect performance. |
Application & sourcing insights
Questions & answers
Verified drop-in options for MMSZ5242B-7-F 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.