What risks should I check before replacing PSD15C?

When replacing the PSD15C, verify the substitute's working voltage (must be 15V), peak power rating (≥350W is ideal), and clamping voltage (lower is better). Also, check the junction capacitance, as a large difference can affect signal integrity in high-speed circuits.

PSD15C Alternatives, Datasheet & Cross Reference | ProTek Devices

Finding a replacement for the PSD15C TVS diode involves matching its 15V working voltage, SOD-323 package, and bi-directional protection. Key considerations for substitutes are peak pulse power, clamping voltage, and junction capacitance to ensure proper circuit protection.

AI replacement insight

Electrical risklow

Several candidates match or exceed key electrical ratings.

Package risklow

SOD-323 is a standard, widely available package.

Sourcing riskmedium

Availability of specific alternatives may vary by region and distributor.

Can it be replaced directly?

Direct replacement for PSD15C should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

SD15C-01FTG offers an upgrade in power and qualification with closely matched parameters.

Main risk

The primary risk when substituting is mismatching junction capacitance, which can impact high-frequency signal performance. A substitute with a lower power rating also increases risk.

Recommended alternatives

Excellent alternative with higher power rating (450W), similar capacitance, and AEC-Q101 qualification.

View details

Alternative comparison matrix

Feature / factor	PSD15C	SD15C-01FTG	PSD15C-ES	TPGC15C	Compatibility / risk
Package	SOD-323	SOD-323	SOD-323	SOD-323	SOD-323 — Form factor matches.; PSD15C-ES: Form factor matches.; TPGC15C: Form factor matches.
Voltage	15V	15V	15V	15V	15V — Reverse working voltage matches.; PSD15C-ES: Reverse working voltage matches.; TPGC15C: Reverse working voltage matches.
Polarity	Bi-directional	Bi-directional	-	-	Bi-directional — Polarity matches.
Power	350W	450W	550W	350W	450W / 550W / 350W — Higher peak pulse power provides more protection.; PSD15C-ES: Significantly higher power rating provides superior protection.; TPGC15C: Peak pulse power matches.
Capacitance	70pF	75pF	36pF	1pF	75pF / 36pF / 1pF — Capacitance is very similar, suitable for same applications.; PSD15C-ES: Lower capacitance may improve signal integrity but is a functional difference.; TPGC15C: Extremely low capacitance is a major functional difference.
Application	N/A	AEC-Q101	-	-	AEC-Q101 — Candidate is automotive qualified, an upgrade.
Clamping Voltage	35V	-	30V	-	30V — Lower clamping voltage offers better protection.

Application & sourcing insights

Questions & answers

Verified drop-in options for PSD15C are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.