SZMMSZ5231BT1G
onsemi
Needs validationmedium risk
Automotive-grade alternative from onsemi with a higher Zener voltage of 5.1V.
Best Alternatives to MMSZ5230BT1G
MMSZ5230BT1G is a 4.7V, 500mW Zener diode in a SOD-123 package from onsemi. It is commonly used for voltage regulation and transient suppression in a wide range of electronic circuits.
AI replacement insight
Electrical riskmedium
Zener voltage differs (5.1V vs 4.7V), requiring circuit validation.
Package risklow
All viable candidates use the same SOD-123 package.
Can it be replaced directly?
No direct, 1-to-1 replacement for the 4.7V MMSZ5230BT1G was found. All viable form-factor candidates have a 5.1V Zener voltage.
Best replacement path
Consider SZMMSZ5231BT1G if your application can tolerate a 5.1V regulation voltage; it is from the same manufacturer and is AEC-Q101 qualified.
Main risk
The main risk is the Zener voltage difference (4.7V vs. 5.1V), which could affect the regulation point and potentially damage downstream components.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | MMSZ5230BT1G | SZMMSZ5231BT1G | MMSZ5231A_R1_00001 | MMSZ5231B | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-123 | SOD-123 | SOD-123 | SOD-123 | SOD-123 — Package matches, ensuring form and fit.; MMSZ5231A_R1_00001: Package matches, ensuring form and fit.; MMSZ5231B: Package matches, ensuring form and fit.; MM1W5V1: Package matches, ensuring form and fit. |
| Voltage | 4.7 V | 5.1 V | 5.1 V | 5.1 V | 5.1 V — Zener voltage is higher. Circuit must tolerate 5.1V instead of 4.7V.; MMSZ5231A_R1_00001: Zener voltage is higher. Circuit must tolerate 5.1V instead of 4.7V.; MMSZ5231B: Zener voltage is higher. Circuit must tolerate 5.1V instead of 4.7V.; MM1W5V1: Zener voltage is higher. Circuit must tolerate 5.1V instead of 4.7V. |
| Power | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW / 1.0 W — Power dissipation rating is identical.; MMSZ5231A_R1_00001: Power dissipation rating is identical.; MMSZ5231B: Power dissipation rating is identical.; MM1W5V1: Power dissipation is double the target, which is a safe upgrade. |
| Application | Standard | AEC-Q101 | - | - | AEC-Q101 — Candidate is automotive qualified, an upgrade. |
| Impedance | 19 Ω | - | 17 Ω | - | 17 Ω — Lower Zener impedance is generally acceptable. |
| Current | 20 mA | - | - | - | 49 mA — Test current differs, affecting direct impedance comparison. |
Application & sourcing insights
Questions & answers
There are no direct drop-in replacements with the same 4.7V Zener voltage among the candidates reviewed. However, parts like SZMMSZ5231BT1G offer a similar package and power rating but with a 5.1V Zener voltage, which requires circuit validation.