P4SMA400A-M3/5A Equivalent & Substitute Parts

Part Overview

The P4SMA400A-M3/5A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 342V reverse standoff voltage class with a maximum clamping voltage of 548V and peak pulse current rating of 550mA. The device is packaged in DO-214AC (SMA) format and is classified as Active product status. Equivalent and substitute parts are identified when component availability is limited or when design requirements permit operation within the specified electrical and mechanical parameter ranges.

Substiute Parts

P4SMA400A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1089P4SMA400A-M3/5A Datasheet

Current PartRFQ

P4SMA400A

Eaton - Electronics DivisionIn Stock: 10205P4SMA400A Datasheet

MFR RecommendedRFQ

PSMAJ400A-13

Diodes IncorporatedIn Stock: 6904PSMAJ400A-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA400A-M3/5A are qualified based on the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 342V
• Voltage - Clamping (Max) @ Ipp: 548V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

Substitute parts must maintain identical voltage ratings and package specifications to ensure direct compatibility in circuit applications. Peak pulse current and power dissipation ratings may vary within acceptable design margins for the intended application class.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain identical voltage specifications (342V reverse standoff, 548V clamping) and package format (DO-214AC, SMA surface mount), establishing electrical and mechanical interchangeability for the 400V class TVS diode application.

The P4SMA400A-M3/5A (Vishay) and PSMAJ400A-13 (Diodes Incorporated) are both ROHS3 compliant. The P4SMA400A (Eaton) is RoHS non-compliant and should be selected only when RoHS compliance is not a design requirement.

The Vishay part operates across a wider temperature range (-65 to 150°C) compared to the Eaton and Diodes Incorporated alternatives (-55 to 150°C). Selection should account for the minimum operating temperature requirement of the end application.

Peak pulse current ratings differ: Vishay 550mA, Diodes Incorporated 730mA, and Eaton 800mA. Higher current ratings provide additional margin for transient suppression but do not affect voltage-based compatibility.

Frequently Asked Questions (FAQ)

Q: Can P4SMA400A (Eaton) be used as a direct replacement for P4SMA400A-M3/5A (Vishay)?

A: Yes, from an electrical and mechanical standpoint. Both parts share identical voltage ratings (342V standoff, 548V clamping) and DO-214AC SMA packaging. However, the Eaton part is RoHS non-compliant, which may restrict use in regulated applications or regions with RoHS requirements.

Q: What is the difference between the three substitute options?

A: All three parts maintain the same voltage class and package. Differences exist in peak pulse current capacity (550mA, 730mA, or 800mA), operating temperature range (-65°C minimum for Vishay versus -55°C for the others), and RoHS compliance status (Vishay and Diodes Incorporated are compliant; Eaton is not).

Q: Does higher peak pulse current rating affect circuit compatibility?

A: No. Higher current ratings indicate greater transient suppression capability but do not affect voltage-based circuit compatibility. The part will function correctly in applications designed for the 342V/548V voltage class regardless of whether the current rating is 550mA, 730mA, or 800mA.

Q: Are all three parts suitable for surface mount assembly?

A: Yes. All three parts are surface mount devices in DO-214AC (SMA) package format and are compatible with standard SMT assembly processes.

Q: Which substitute should be selected for new designs?

A: For new designs requiring RoHS compliance, select either P4SMA400A (Diodes Incorporated) or P4SMA400A-M3/5A (Vishay). If extended low-temperature operation below -55°C is required, the Vishay part is the only option among the three.