Is there a pin-compatible replacement for PESDMC2FD5VB?

WE05DUCF-B shares the same DFN1006-2L package and is electrically very similar, making it a likely pin-compatible candidate. However, layout verification is always recommended before production.

What risks should I check before replacing PESDMC2FD5VB?

The most critical parameter is the junction capacitance. The target has an ultra-low 0.42pF capacitance. Using a replacement with higher capacitance can degrade high-speed signal integrity. Also verify the working voltage (5V) and polarity (bi-directional).

PESDMC2FD5VB Alternatives, Datasheet & Cross Reference | Leiditech

PESDMC2FD5VB is a 5V bi-directional low-capacitance ESD protection diode in a DFN1006-2L package, ideal for protecting high-speed data lines. Finding a replacement requires matching its ultra-low capacitance (0.42pF) to maintain signal integrity.

AI replacement insight

Electrical riskhigh

High if capacitance is not matched.

Package risklow

DFN1006-2L is a standard package.

Firmware risklow

Not applicable for this passive component.

Can it be replaced directly?

WE05DUCF-B is a strong candidate for direct replacement, but other options have significantly higher capacitance and are not suitable for high-speed lines.

Best replacement path

WE05DUCF-B is the most promising path due to its closely matched low capacitance and other key electricals.

Main risk

The primary risk is increased junction capacitance, which can degrade signal integrity on high-speed interfaces.

Recommended alternatives

Strong functional alternative with closely matched low capacitance (0.5pF vs 0.42pF) and higher power rating.

View details

Alternative comparison matrix

Feature / factor	PESDMC2FD5VB	WE05DUCF-B	PESDNC2FD5VB	Compatibility / risk
Package	DFN1006-2L	DFN1006-2L	-	DFN1006-2L — Same package and pin count.
Polarity	Bi-directional	Bi-directional	-	Bi-directional — Polarity matches.
Voltage	5V	5V	-	5V — Working voltage matches.
Capacitance	0.42 pF	0.5 pF	-	15 pF — Significantly higher capacitance, risk to signal integrity.
Power	40W	60W	-	80W — Higher power rating.

Application & sourcing insights

Questions & answers

WE05DUCF-B from Leiditech is a strong functional alternative, offering a similar 5V rating, DFN1006-2L package, and very low capacitance (0.5pF), making it suitable for high-speed applications.