SMAJ5926B-TP is a strong candidate with a higher power rating (1.5W) but a slightly lower Zener voltage of 11V. Circuit validation is required.
Best Alternatives to 1SMA4742A
1SMA4742A is a 1W, 12V Zener diode in a standard DO-214AC (SMA) package, commonly used for voltage regulation. When seeking replacements, matching the 12V Zener voltage and 1W power rating is critical.
AI replacement insight
Electrical riskhigh
Zener voltage mismatch is a critical functional difference.
Package risklow
The DO-214AC (SMA) package is standard and widely available.
Can it be replaced directly?
No direct pin-to-pin replacement was found. Candidates like SMAJ5926B-TP have different Zener voltages requiring circuit review.
Best replacement path
Find a Zener diode with Vz=12V, Power>=1W, and a DO-214AC/SMA package. SMAJ5926B-TP is a close option but has an 11V rating.
Main risk
The primary risk is substituting a part with a different Zener voltage, which will alter the circuit's regulation point.
Recommended alternatives
Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.
Alternative comparison matrix
| Feature / factor | 1SMA4742A | SMAJ5926B-TP | Z1SMA15 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DO-214AC (SMA) | DO-214AC, SMA | DO-214AC, SMA | DO-214AC, SMA — Package matches, enabling form-fit compatibility.; Z1SMA15: Package matches, enabling form-fit compatibility. | |
| Voltage | 12 V | 11 V | 15 V | 11 V / 15 V — Zener voltage is lower, which will change the regulation point.; Z1SMA15: Zener voltage is higher, which will change the regulation point. | |
| Power | 1 W | 1.5 W | 1 W | 1.5 W / 1 W — Higher power rating provides more thermal margin.; Z1SMA15: Power rating is identical. | |
| Impedance | 9.0 Ω | 5.5 Ohms | 11 Ohms | 5.5 Ohms / 11 Ohms — Lower impedance provides tighter voltage regulation.; Z1SMA15: Impedance is slightly higher, may affect regulation. | |
| Tolerance | ±5% | ±5% | - | ±5% — Voltage tolerance is identical. |