Is there a pin-compatible replacement for PTVSLC3D3V3B?

While several parts share the SOD-323 package, no pin-compatible replacements with matching 3.3V working voltage and low capacitance were identified. Candidates with a 5V rating exist but are not functionally equivalent.

What risks should I check before replacing PTVSLC3D3V3B?

Key risks include: 1) Protection Level: A higher working voltage (e.g., 5V vs 3.3V) means the device clamps at a higher voltage, potentially leaving your circuit unprotected. 2) Signal Integrity: A higher capacitance (e.g., >30pF vs 3.5pF) can degrade high-speed signals.

PTVSLC3D3V3B Alternatives, Datasheet & Cross Reference | Prisemi

Finding a replacement for the PTVSLC3D3V3B TVS diode requires matching its 3.3V working voltage and low 3.5pF capacitance. Alternatives exist but often have higher voltage and capacitance, requiring careful engineering review.

AI replacement insight

Electrical riskhigh

Higher working voltage (5V vs 3.3V) and capacitance (>30pF vs 3.5pF) can lead to insufficient protection and signal degradation.

Package risklow

Candidates share the same SOD-323 package, ensuring physical compatibility.

Can it be replaced directly?

No direct drop-in replacement was found among the candidates reviewed. All viable options are parametrically different and present significant risks.

Best replacement path

Search for a bidirectional TVS in a SOD-323 package with a reverse working voltage of 3.3V and capacitance under 5pF.

Main risk

The primary risk is inadequate circuit protection due to the higher clamping voltages of all available alternatives.

Recommended alternatives

Shares the SOD-323 package but has a higher 5V working voltage and significantly higher capacitance.

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Alternative comparison matrix

Feature / factor	PTVSLC3D3V3B	PSD05C-LF-T7	SD05C	Compatibility / risk
Package	SOD-323	SOD-323	SOD-323	SOD-323 — Form factor matches.; SD05C: Form factor matches.
Polarity Or Type	Bidirectional	Bidirectional	Bidirectional	Bidirectional — Polarity matches.; SD05C: Polarity matches.
Voltage V	3.3V	5.0V	5.0V	5.0V — Higher working voltage offers less protection.; SD05C: Higher working voltage offers less protection.
Power W	350W	300W-400W	300W-350W	300W-400W / 300W-350W — Conflicting data (300W-400W); verify datasheet.; SD05C: May be a slight downgrade depending on manufacturer.
Capacitance	3.5pF	35pF	~30-50pF	35pF / ~30-50pF — Significantly higher capacitance may affect signal integrity.; SD05C: Significantly higher capacitance may affect signal integrity.

Application & sourcing insights

Questions & answers

No direct drop-in replacements were found. Candidates like SD05C have the same package but a higher 5V working voltage and significantly higher capacitance, making them risky alternatives that require circuit validation.