Is there a pin-compatible replacement for PTVS5V0S1UR-FS?

CESD5V0D1 and SLMESD5V0D9 use the same SOD-123 package and are likely pin-compatible. However, due to significant differences in electrical parameters like power rating and capacitance, they are not drop-in replacements and require engineering validation.

What risks should I check before replacing PTVS5V0S1UR-FS?

Before replacing, verify the peak pulse power (Ppp) requirement of your circuit, as some alternatives have a much lower rating. Also, check the maximum clamping voltage to ensure adequate protection. For high-speed signals, review the diode's capacitance to avoid signal degradation.

PTVS5V0S1UR-FS Alternatives, Datasheet & Cross Reference | FUXINSEMI

Finding a substitute for the PTVS5V0S1UR-FS TVS diode requires matching its 5V standoff voltage, 400W power rating, and SOD-123 package. While no perfect drop-in replacements are identified, several functional alternatives exist with specific trade-offs.

AI replacement insight

Electrical riskmedium

Candidates have different power ratings, clamping voltages, or capacitance.

Package risklow

Several candidates share the same SOD-123 package.

Can it be replaced directly?

No direct, drop-in replacement for the PTVS5V0S1UR-FS has been verified. All candidates require engineering review due to differences in power rating, clamping voltage, or capacitance.

Best replacement path

Evaluate functional alternatives like SLMESD5V0D9 for its high power rating, but carefully check its high capacitance. For lower-power needs, CESD5V0D1 is a form-fit option but offers significantly less protection.

Main risk

The main risk is selecting a part with insufficient power handling (Ppp) or a higher clamping voltage, which could fail to protect the downstream circuit.

Recommended alternatives

A SOD-123 alternative with a higher power rating, but its very high capacitance requires careful evaluation.

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Alternative comparison matrix

Feature / factor	PTVS5V0S1UR-FS	SLMESD5V0D9	CESD5V0D1	Compatibility / risk
Package	SOD-123	SOD-123	-	SOD-123 — Package is form-fit compatible.
Voltage	5.0V	5V	-	5.0V — Reverse standoff voltage matches.
Power	400W	1200W	-	170W — Significantly lower peak pulse power rating.
Capacitance	Not specified	700pF	-	700pF — Very high capacitance may impact signal integrity.
Breakdown Voltage	6.4V min	6.2V	-	6.2V — Min breakdown voltage is slightly below target's range.
Polarity	Unidirectional	-	Unidirectional	Unidirectional — Polarity matches the target.
Clamping Voltage	9.2V	-	13V	13V — Higher clamping voltage offers less protection.

Application & sourcing insights

Questions & answers

No direct drop-in replacement has been verified. The best path is to review functional alternatives like SLMESD5V0D9, which has a higher power rating but also high capacitance, or CESD5V0D1, which is a high-risk downgrade with a lower power rating.