1SMA4739A
MDD(Microdiode Semiconductor)
Needs validationmedium risk
Functionally similar Zener diode in the same package with a slightly higher Zener voltage of 9.1V.
Best Alternatives to 1SMA4738A
1SMA4738A is a 1W, 8.2V Zener diode in an SMA package. This page reviews potential alternatives, focusing on matching package, power, and Zener voltage for your application.
AI replacement insight
Electrical riskmedium
Zener voltage difference requires circuit analysis.
Package risklow
Candidates share the same SMA package.
Can it be replaced directly?
No direct drop-in replacement with the exact 8.2V Zener voltage was found. Alternatives have different voltages and require engineering review.
Best replacement path
Consider 1SMA4739A (9.1V) as the closest higher voltage option or 1SMA4737A (7.5V) as the closest lower voltage option. Both require circuit validation.
Main risk
The primary risk is the change in Zener voltage, which can affect the circuit's voltage regulation point.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | 1SMA4738A | 1SMA4739A | 1SMA4737A | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SMA (DO-214AC) | SMA (DO-214AC) | SMA (DO-214AC) | SMA (DO-214AC) — Package is form-factor compatible.; 1SMA4737A: Package is form-factor compatible. | |
| Voltage | 8.2 V | 9.1 V | 7.5 V | 9.1 V / 7.5 V — Higher Zener voltage requires circuit validation.; 1SMA4737A: Lower Zener voltage requires circuit validation. | |
| Power | 1.0 W | 1.0 W | 1.0 W | 1.0 W — Power rating is identical.; 1SMA4737A: Power rating is identical. | |
| Lifecycle | - | Active | Active | Active — Candidate is actively produced.; 1SMA4737A: Candidate is actively produced. |
Application & sourcing insights
Questions & answers
1SMA4739A is a potential alternative with a slightly higher Zener voltage of 9.1V. It shares the same package and power rating but requires engineering review for your application.