Is there a pin-compatible replacement for MM3Z5V6?

Yes, many Zener diodes share the 2-pin SOD-323 package. However, pin compatibility is not enough. A replacement must also have a 5.6V Zener voltage to be functionally equivalent. Candidates like MM3Z6V2 have the same package but a different voltage.

What risks should I check before replacing MM3Z5V6?

The primary risk is a mismatch in the Zener voltage (Vz), which must be 5.6V. Also verify power dissipation (≥200mW), Zener impedance (Zzt), and reverse leakage current (Ir) to ensure your circuit's regulation and power consumption are unaffected.

MM3Z5V6 Alternatives, Datasheet & Cross Reference | Diotec Semiconductor AG

MM3Z5V6 is a 5.6V, 200mW Zener diode in a compact SOD-323 package from Diotec Semiconductor, used for voltage regulation. Finding a precise replacement requires matching the Zener voltage, power rating, and package.

AI replacement insight

Electrical riskhigh

Zener voltage is a critical functional parameter; mismatch will cause circuit failure.

Package risklow

The SOD-323 package is standard, ensuring physical compatibility.

Sourcing riskmedium

Many 5.6V Zener diodes exist, but require careful vetting of datasheets to confirm all parameters.

Can it be replaced directly?

No direct, verified drop-in replacement has been identified in this review. All candidates have different Zener voltages and require careful circuit analysis before use.

Best replacement path

Search for Zener diodes with Vz=5.6V, P_max≥200mW in an SOD-323 package from other manufacturers, such as parts in the BZT52C5V6S series.

Main risk

The main risk is using a part with an incorrect Zener voltage, which will lead to improper voltage regulation and could damage the circuit.

Recommended alternatives

A Zener diode in the same package with a higher Zener voltage (6.2V) and similar power rating.

View details

Alternative comparison matrix

Feature / factor	MM3Z5V6	MM3Z6V2	MM3Z6V8	Compatibility / risk
Package	SOD-323	SOD-323	SOD-323	SOD-323 — Package matches, ensuring form and fit.; MM3Z6V8: Package matches, ensuring form and fit.
Voltage	5.6 V	6.2 V	6.8 V	6.2 V / 6.8 V — Zener voltage is higher.; MM3Z6V8: Zener voltage is significantly higher.
Power	200 mW	200 mW	200 mW	200 mW — Power rating is equivalent.; MM3Z6V8: Power rating is equivalent.
Zener Impedance	40 Ohms	10 Ohms	15 Ohms	10 Ohms / 15 Ohms — Lower impedance provides better regulation.; MM3Z6V8: Lower impedance provides better regulation.

Application & sourcing insights

Questions & answers

The best alternative is another Zener diode with a 5.6V nominal voltage, a power rating of at least 200mW, and an SOD-323 package. Parts like BZT52C5V6S from other vendors are a good starting point for evaluation.