Is there a pin-compatible replacement for MMBZ27VALT1G?

SZMMBZ27VALT1G appears to be pin-compatible, sharing the SOT-23 package and Dual Common Anode configuration. A datasheet review is essential to confirm the pinout matches your layout.

What risks should I check before replacing MMBZ27VALT1G?

Key risks include mismatched working voltage (VRWM), clamping voltage (VC), and peak pulse current (Ipp). Also, ensure the replacement has the same 'Dual Common Anode' configuration and SOT-23 pinout to avoid circuit damage.

MMBZ27VALT1G Alternatives, Datasheet & Cross Reference | onsemi

MMBZ27VALT1G is a popular 22V dual common anode TVS diode from onsemi in a SOT-23 package. When seeking alternatives, key parameters include working voltage, peak power, and pin configuration.

AI replacement insight

Electrical riskmedium

Working voltage and peak current must be verified.

Package risklow

SOT-23 is a standard package, but pinout must be confirmed.

Can it be replaced directly?

SZMMBZ27VALT1G is a likely direct replacement, but requires datasheet verification for pinout and peak current. Other candidates have significant parametric or functional differences.

Best replacement path

The most promising path is the automotive-grade SZMMBZ27VALT1G, which appears to be a direct functional match and potential upgrade.

Main risk

The main risk is selecting a part with a different polarity (e.g., common cathode, bi-directional) or a higher working voltage, which could compromise circuit protection.

Recommended alternatives

onsemi SZMMBZ27VALT1G is an AEC-Q101 qualified upgrade with the same package, polarity, and key voltage ratings.

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Alternative comparison matrix

Feature / factor	MMBZ27VALT1G	SZMMBZ27VALT1G	MMBZ33VALT1G	Compatibility / risk
Package	SOT-23	SOT-23	SOT-23	SOT-23 — Package matches.; MMBZ33VALT1G: Package matches.
Polarity Or Type	Dual Common Anode	Dual Common Anode	Dual Common Anode	Dual Common Anode — Polarity and configuration match.; MMBZ33VALT1G: Polarity and configuration match.
Voltage V	22V	22V	26V	22V / 26V — Working voltage (VRWM) matches.; MMBZ33VALT1G: Higher working voltage may not protect the circuit.
Power W	40W	40W	40W	40W — Peak power rating matches.; MMBZ33VALT1G: Peak power rating matches.
Application	Standard	AEC-Q101	-	AEC-Q101 — Candidate is automotive qualified.

Application & sourcing insights

Questions & answers

SZMMBZ27VALT1G is a strong candidate, offering the same key electricals and package with an AEC-Q101 automotive qualification. However, verification of all parameters against your design is recommended.