
Leiditech
A functional alternative from the same series in the same package but with a 12V Zener voltage.
Finding a substitute for the BZX584C10, a 10V Zener diode in a compact SOD-523 package, requires careful attention to electrical parameters. While many parts share the same package, matching the precise 10V Zener voltage is critical for proper circuit function.
Zener voltage mismatch is a critical failure point for regulation circuits.
Multiple alternatives exist in the correct SOD-523 package.
No direct, drop-in replacement for BZX584C10 was found among the candidates. Alternatives exist but have different Zener voltages, which is a critical parameter.
Find a Zener diode with a 10V nominal voltage in a SOD-523 package. If unavailable, using an alternative like BZX584C12 (12V) requires careful circuit analysis and possible redesign.
The primary risk is using a substitute with a different Zener voltage, which will alter the circuit's voltage regulation point and could lead to malfunction or damage.

Leiditech
A functional alternative from the same series in the same package but with a 12V Zener voltage.
| Feature / factor | BZX584C10 | BZX584C12 | BZX584C15-AU_R1_00001 | LM5Z15VT1G | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-523 | SOD-523 | SOD-523 | SOD-523 | SOD-523 — Package matches, ensuring form-fit compatibility.; BZX584C15-AU_R1_00001: Package matches, ensuring form-fit compatibility.; LM5Z15VT1G: Package matches, ensuring form-fit compatibility. |
| Voltage | 10.0V | 12.0V | 15V | 15.0V | 12.0V / 15V / 15.0V — Zener voltage is different, requires redesign.; BZX584C15-AU_R1_00001: Zener voltage is significantly different.; LM5Z15VT1G: Zener voltage is significantly different. |
| Power | 0.15W | 0.15W | 200mW | 0.2W | 0.15W / 200mW / 0.2W — Power rating is identical.; BZX584C15-AU_R1_00001: Higher power rating provides more thermal margin.; LM5Z15VT1G: Higher power rating provides more thermal margin. |
| Application | Standard | - | AEC-Q101 | - | AEC-Q101 — Automotive qualification may be an upgrade. |
No direct drop-in replacement was identified. The best alternatives, like BZX584C12, have the same package but a different Zener voltage (12V vs 10V), which requires careful engineering review before use.