Is there a pin-compatible replacement for TPESD0402G12V?

Yes, PESD0402AV12 from Leiditech appears to be a pin-compatible replacement, sharing the same 0402 package, pin count, and key electrical characteristics. However, full datasheet validation is recommended before production use.

What risks should I check before replacing TPESD0402G12V?

The main risk is mismatched capacitance, which can degrade signal integrity on high-speed lines. Also, verify the working voltage (V_RWM) is sufficient and the polarity (bidirectional) matches your application's needs.

TPESD0402G12V Alternatives, Datasheet & Cross Reference | TECH PUBLIC

TPESD0402G12V is an ultra-low capacitance (0.05pF) bidirectional TVS diode in a 0402 package, designed for protecting high-speed data lines. Finding a substitute requires matching capacitance, voltage, and package.

AI replacement insight

Electrical riskhigh

Mismatched capacitance can cause signal issues. Polarity must be bidirectional.

Package risklow

The 0402 package is standard, but pad layouts should be double-checked.

Can it be replaced directly?

Yes, PESD0402AV12 from Leiditech is a strong candidate for direct replacement, matching the 12V rating, 0.05pF capacitance, and 0402 package.

Best replacement path

PESD0402AV12 is the best direct match. TPESD0402G15V is the best upgrade path from the same manufacturer.

Main risk

The primary risk when substituting this part is an increase in capacitance, which can degrade signal integrity on the high-speed data lines it is designed to protect.

Recommended alternatives

A same-series upgrade from the original manufacturer with a higher 15V working voltage.

View details

Alternative comparison matrix

Feature / factor	TPESD0402G12V	TPESD0402G15V	PESD0402AV12	PESD0402-140	Compatibility / risk
Package	0402	0402	0402	0402	0402 — Form factor matches.; PESD0402AV12: Form factor matches.; PESD0402-140: Form factor matches.
Voltage	12V	15V	12V	14V	15V / 12V / 14V — Higher working voltage provides more margin.; PESD0402AV12: Working voltage matches.; PESD0402-140: Working voltage is slightly higher.
Capacitance	0.05pF	0.05pF	0.05pF	0.05pF	0.05pF — Ultra-low capacitance matches.; PESD0402AV12: Ultra-low capacitance matches.; PESD0402-140: Ultra-low capacitance matches.
Polarity	Bidirectional (inferred)	Bidirectional	Bidirectional	Bidirectional	Bidirectional — Polarity matches application need.; PESD0402AV12: Polarity matches.; PESD0402-140: Polarity matches.
Manufacturer	TECH PUBLIC	-	Leiditech	-	Leiditech — Cross-vendor alternative.

Application & sourcing insights

Questions & answers

The best alternative is PESD0402AV12 for a direct parametric match, or TPESD0402G15V for a manufacturer-approved upgrade path with a higher voltage rating.