Is there a pin-compatible replacement for ESD5451X-MS?

Several parts like PESDNC2FD5VBH and WE05DF-BH use the same DFN1006-2L package, making them physically compatible. However, a true pin-compatible replacement requires verifying electrical parameters like capacitance and polarity, which may differ.

What risks should I check before replacing ESD5451X-MS?

Before replacing, check these key parameters: 1) Polarity must be bi-directional. 2) Peak Pulse Current should be at least 8A. 3) Capacitance should be close to 15pF to avoid impacting signal integrity on high-speed lines.

ESD5451X-MS Alternatives, Datasheet & Cross Reference | MSKSEMI

Finding a substitute for the ESD5451X-MS 5V TVS diode involves matching the DFN1006-2L package and key electrical ratings. While several alternatives exist, careful review of peak current and capacitance is required.

AI replacement insight

Electrical riskmedium

Candidates have varying capacitance and current ratings that must be checked.

Package risklow

Multiple candidates share the same DFN1006-2L package, ensuring form-fit compatibility.

Can it be replaced directly?

No direct, drop-in replacement has been verified. Several candidates have the same package and voltage, but differ in key electrical parameters like current rating or capacitance, requiring engineering review.

Best replacement path

PESDNC2FD5VBH is a promising alternative with a higher current rating, but its higher capacitance must be evaluated for your circuit's signal speed.

Main risk

The primary risks are mismatched capacitance affecting signal integrity, insufficient current rating leading to component failure, and incorrect polarity (uni-directional vs. bi-directional).

Recommended alternatives

A form-fit alternate with higher current rating but also higher capacitance, requiring engineering review.

View details

Alternative comparison matrix

Feature / factor	ESD5451X-MS	PESDNC2FD5VBH	WE05DF-BH	JEB05DFA	Compatibility / risk
Package	DFN1006-2L	DFN1006-2L	DFN1006-2L	DFN1006-2L	DFN1006-2L — Same package and pin count.; WE05DF-BH: Same package and pin count.; JEB05DFA: Same package and pin count.
Voltage	5.0V	5.0V	5.0V	5.0V	5.0V — Working voltage matches.; WE05DF-BH: Working voltage matches.; JEB05DFA: Working voltage matches.
Current	8.0A	10.0A	9.0A	7.0A	10.0A / 9.0A / 7.0A — Higher peak pulse current provides more protection.; WE05DF-BH: Higher peak pulse current.; JEB05DFA: Lower peak pulse current offers less protection.
Polarity Or Type	Bi-directional	Bi-directional	Unknown	-	Bi-directional / Unknown — Polarity matches target.; WE05DF-BH: Polarity (uni/bi-directional) must be verified from datasheet.
Capacitance	15pF	35pF	-	-	35pF — Higher capacitance may affect high-speed signal integrity.

Application & sourcing insights

Questions & answers

PESDNC2FD5VBH is a strong candidate due to its matching package, voltage, and higher current rating. However, you must verify that its higher capacitance (35pF vs. 15pF) is acceptable for your application.