Is there a pin-compatible replacement for BZX84C33LT1G?

Yes, SZBZX84C33LT1G is a pin-compatible replacement. BZX84-C33,215 from Nexperia also uses the same SOT-23 package and is likely pin-compatible, but you must verify its pinout from the datasheet before design-in.

What risks should I check before replacing BZX84C33LT1G?

When replacing BZX84C33LT1G, especially with a part from a different manufacturer, you should verify the pinout is identical. Also, check dynamic parameters like Zener impedance (Zzt) and reverse leakage current (Ir) to ensure performance in your circuit is unaffected.

BZX84C33LT1G Alternatives, Datasheet & Cross Reference | onsemi

BZX84C33LT1G is a 33V, 225mW Zener diode in a SOT-23 package from onsemi. Excellent replacements are available, including a pin-compatible automotive-grade version from onsemi and functional alternatives from other major suppliers.

AI replacement insight

Electrical risklow

Key static parameters match well across top candidates, but dynamic parameters (impedance) need checking for non-identical parts.

Package riskmedium

SOT-23 packages are standard, but pinout must be confirmed for cross-vendor parts. Risk is low for same-MFR family parts.

Can it be replaced directly?

Yes, SZBZX84C33LT1G from onsemi is a direct, pin-compatible replacement for BZX84C33LT1G, offering an upgrade to AEC-Q101 qualification.

Best replacement path

The best replacement is SZBZX84C33LT1G, an automotive-grade version from the same manufacturer (onsemi) with identical electrical and package specifications.

Main risk

The main risk involves using cross-vendor alternatives, which requires careful verification of the pinout and dynamic electrical characteristics from the datasheet.

Recommended alternatives

An AEC-Q101 qualified version from the same manufacturer with identical key electrical parameters and package.

View details

Alternative comparison matrix

Feature / factor	BZX84C33LT1G	SZBZX84C33LT1G	BZX84-C33,215	Compatibility / risk
Voltage	33 V	33 V	33.0 V	33 V / 33.0 V — Zener voltage matches.; BZX84-C33,215: Zener voltage matches.
Power	225 mW	225 mW	0.25 W	225 mW / 0.25 W — Power dissipation matches.; BZX84-C33,215: Slightly higher power rating is a safe margin.
Package	SOT-23 (TO-236)	SOT-23 (TO-236)	SOT23 (TO-236AB)	SOT-23 (TO-236) / SOT23 (TO-236AB) — Package is identical.; BZX84-C33,215: Package is form-factor compatible.
Application	Standard	AEC-Q101	-	AEC-Q101 — Candidate is automotive qualified, an upgrade.
Pinout	Standard	-	Unknown	Unknown — Pinout must be verified from datasheet.

Application & sourcing insights

Questions & answers

The best alternative is SZBZX84C33LT1G. It is made by the same manufacturer (onsemi) and has identical electrical specs and package, with the added benefit of being AEC-Q101 qualified for automotive use.