P4SMA440AHE3_A/I Equivalent & Substitute Parts

Part Overview

The P4SMA440AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the P4SMA TransZorb® series. This surface mount component in DO-214AC (SMA) package is designed for transient voltage protection applications. The main part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design requirements and procurement needs.

Substiute Parts

P4SMA440AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1034P4SMA440AHE3_A/I Datasheet

Current PartRFQ

P4SMA440A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 937P4SMA440A-M3/5A Datasheet

DirectRFQ

P4SMA440A-M3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 6086P4SMA440A-M3/61 Datasheet

DirectRFQ

P4SMA440AHE3_AIH

Vishay General Semiconductor - Diodes DivisionIn Stock: 1071P4SMA440AHE3_AIH Datasheet

DirectRFQ

P4SMA440AHE3_ALL

Vishay General Semiconductor - Diodes DivisionIn Stock: 1075P4SMA440AHE3_ALL Datasheet

DirectRFQ

P4SMA440AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 704P4SMA440AHM3_B/I Datasheet

DirectRFQ

P4SMA440A

Eaton - Electronics DivisionIn Stock: 65229P4SMA440A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4SMA440AHE3_A/I is determined by the following critical parameters that must remain constant across all equivalent parts:

• Voltage - Reverse Standoff (Typ): 376V
• Voltage - Breakdown (Min): 418V
• Voltage - Clamping (Max) @ Ipp: 602V
• Current - Peak Pulse (10/1000µs): 500mA minimum
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Operating Temperature Range: -65°C ~ 150°C (TJ)
• Unidirectional Channels: 1

Substitute parts are grouped into two categories:

Category 1: Vishay Direct Substitutes (Active Status) Parts P4SMA440A-M3/5A, P4SMA440A-M3/61, P4SMA440AHE3_AIH, and P4SMA440AHE3_ALL maintain identical electrical specifications and automotive-grade qualification (AEC-Q101). These parts differ only in packaging format (Tape & Reel vs. standard packaging) and inventory availability.

Category 2: Cross-Manufacturer Substitute (Eaton) Part P4SMA440A from Eaton - Electronics Division meets the core voltage and package requirements with higher peak pulse current (700mA) and power rating (400W), providing enhanced performance margins within the same physical footprint.

Parameter Comparison

Engineering Selection Recommendations

For Automotive Applications with AEC-Q101 Requirement: Select from Vishay parts P4SMA440AHE3_AIH or P4SMA440AHE3_ALL. Both maintain automotive-grade qualification and AEC-Q101 certification identical to the obsolete main part. These are direct functional equivalents with active product status and full inventory availability.

For General Purpose Applications: Vishay parts P4SMA440A-M3/5A and P4SMA440A-M3/61 are suitable alternatives. These parts meet all core electrical specifications and are available in active status with higher inventory levels (910 and 6055 units respectively). Packaging format differs (Tape & Reel), which may affect procurement and assembly processes.

For Enhanced Performance Margin: Eaton P4SMA440A provides higher peak pulse current (700mA vs. 500mA) and power rating (400W vs. 300W) while maintaining identical voltage specifications and SMA package compatibility. This part is suitable for applications requiring additional transient protection margin. Note that automotive-grade qualification is not specified for this variant.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. The Eaton part specifies RoHS Compliant status without ROHS3 designation. For applications requiring ROHS3 specifically, Vishay substitutes are preferred.

Frequently Asked Questions (FAQ)

Q: Can P4SMA440A-M3/5A directly replace P4SMA440AHE3_A/I in production? A: Yes. Both parts share identical electrical specifications (376V standoff, 418V breakdown, 602V clamping, 500mA peak pulse). The primary difference is packaging format (Tape & Reel vs. standard). Verify your assembly equipment compatibility with the packaging format before implementation.

Q: What is the difference between Vishay substitutes and the Eaton P4SMA440A? A: Vishay substitutes maintain the original 500mA peak pulse current and 300W power rating. The Eaton part increases both to 700mA and 400W respectively, providing enhanced transient protection capability within the same physical package. All three meet the core voltage requirements.

Q: Is the Eaton P4SMA440A suitable for automotive applications? A: The Eaton part meets the electrical specifications required for automotive transient protection. However, automotive-grade designation and AEC-Q101 qualification are not specified in the available data. For applications with explicit automotive qualification requirements, use Vishay parts P4SMA440AHE3_AIH or P4SMA440AHE3_ALL.

Q: Why is the main part P4SMA440AHE3_A/I listed as obsolete? A: Obsolescence is a manufacturer lifecycle decision. Active substitutes from the same P4SMA series are available with identical electrical performance and current production status, ensuring design continuity and supply chain reliability.

Q: Are all substitute parts compatible with the DO-214AC (SMA) footprint? A: Yes. All listed substitute parts use the DO-214AC (SMA) package with surface mount configuration, ensuring PCB footprint and reflow soldering process compatibility.

Q: What is the minimum operating temperature difference between substitutes? A: Vishay parts operate from -65°C to 150°C. The Eaton P4SMA440A operates from -55°C to 150°C. For applications requiring operation below -55°C, Vishay substitutes are required.