Is there a pin-compatible replacement for ESD5451N-2-ES?

Several parts, including ESD5451X-MS and PESDNC2FD5VBH, use the same DFN1006-2L package and are likely pin-compatible. However, they are not guaranteed drop-in replacements without verifying key electrical parameters like power rating and capacitance.

What risks should I check before replacing ESD5451N-2-ES?

Before replacing ESD5451N-2-ES, you must check: 1) Peak Pulse Power (Ppp) to ensure the substitute can handle expected surges. 2) Junction Capacitance (Cj) to avoid degrading high-speed signal integrity. 3) Clamping Voltage (Vc) to ensure it protects downstream components effectively.

ESD5451N-2-ES Alternatives, Datasheet & Cross Reference | ElecSuper

Find and compare alternatives for the ESD5451N-2-ES, a 5V bi-directional TVS diode in a DFN1006-2L package. This guide helps you evaluate replacements by matching key parameters like package, voltage, peak power, and capacitance.

AI replacement insight

Electrical riskmedium

Candidates have varying power ratings and capacitance values that must be verified.

Package risklow

All recommended candidates use the same DFN1006-2L package, implying form and fit compatibility.

Can it be replaced directly?

No guaranteed drop-in replacement exists without review. ESD5451X-MS is a strong candidate, but its slightly lower power rating (approx. 80W vs 96W) must be acceptable for your application's surge requirements.

Best replacement path

ESD5451X-MS is the strongest candidate, matching package, voltage, and capacitance, but requires review of its slightly lower power rating.

Main risk

The primary risks are mismatched peak pulse power (Ppp), affecting surge survivability, and different junction capacitance (Cj), which can impact signal integrity.

Recommended alternatives

A strong alternative in the same package with matching voltage and capacitance, but a slightly lower power rating.

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Alternative comparison matrix

Feature / factor	ESD5451N-2-ES	ESD5451X-MS	PESDNC2FD5VBH	Compatibility / risk
Package	DFN1006-2L	DFN1006-2L	DFN1006-2L	DFN1006-2L — Same package and pin count.; PESDNC2FD5VBH: Same package and pin count.
Voltage	5.0V	5.0V	5.0V	5.0V — Working voltage matches.; PESDNC2FD5VBH: Working voltage matches.
Power	96W	~80W	100W	~80W / 100W — Candidate peak power is slightly lower. Verify application surge requirements.; PESDNC2FD5VBH: Higher peak power rating is an upgrade.
Capacitance	15pF	15pF	35pF	15pF / 35pF — Junction capacitance matches.; PESDNC2FD5VBH: Significantly higher capacitance may affect high-speed signals.
Polarity	Bi-directional (per summary)	Bi-directional (per summary)	-	Bi-directional (per summary) — Both parts are bi-directional.

Application & sourcing insights

Questions & answers

The best alternative appears to be ESD5451X-MS from MSKSEMI. It matches the package, 5V working voltage, and 15pF capacitance, but has a slightly lower peak power rating (approx. 80W vs 96W) that requires engineering validation.