Equivalent & Substitute Parts for P4SMA15A

Part Overview

The P4SMA15A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in surface-mount applications. This component operates with a reverse standoff voltage of 12.8V and provides clamping at 21.2V maximum, with a peak pulse current rating of 19.3A. The part is actively produced and RoHS3 compliant, making it suitable for modern electronic circuit protection requirements. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability in circuit applications.

Substiute Parts

P4SMA15A

Littelfuse Inc.In Stock: 10446P4SMA15A Datasheet

Current PartRFQ

P4SMA15A

Eaton - Electronics DivisionIn Stock: 10438P4SMA15A Datasheet

MFR RecommendedRFQ

P4SMA15A

Eaton - Electronics DivisionIn Stock: 10438P4SMA15A Datasheet

MFR RecommendedRFQ

P4SMA15A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 55238P4SMA15A-E3/61 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA15A TVS diode are qualified based on the following critical parameters that determine functional interchangeability:

• Voltage - Reverse Standoff (Typ): 12.8V
• Voltage - Clamping (Max) @ Ipp: 21.2V
• Current - Peak Pulse (10/1000µs): 19.3A nominal (tolerance range 18.9A–19.3A acceptable)
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional (1 channel)

All identified substitute parts maintain these electrical specifications within acceptable engineering tolerances and are packaged in the same DO-214AC (SMA) surface-mount form factor. Substitutes are sourced from qualified manufacturers with active product status and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

All three parts listed are actively produced and meet RoHS compliance requirements, ensuring availability and regulatory conformance for current applications. The P4SMA15A from Littelfuse and Eaton are direct part number matches with identical electrical specifications. The P4SMA15A-E3/61 from Vishay (TransZorb® series) is a qualified substitute with a peak pulse current specification of 18.9A, which is within acceptable tolerance of the 19.3A nominal rating and maintains all other critical voltage and power parameters.

Selection between these parts should be based on supplier availability, lead time, and procurement requirements. The Eaton variant operates across a narrower temperature range (-55 to 150°C) compared to the Littelfuse and Vishay options (-65 to 150°C), which may be a consideration for applications requiring extended low-temperature performance. All parts are packaged identically in DO-214AC (SMA) surface-mount form factor and are suitable for direct substitution in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can P4SMA15A-E3/61 from Vishay be used as a direct replacement for P4SMA15A from Littelfuse?

A: Yes. The P4SMA15A-E3/61 maintains the same reverse standoff voltage (12.8V), clamping voltage (21.2V), and power rating (400W). The peak pulse current specification of 18.9A is within acceptable tolerance of the 19.3A nominal rating. Both parts use identical DO-214AC (SMA) packaging and are surface-mount compatible.

Q: What is the difference between the Littelfuse and Eaton P4SMA15A parts?

A: Both parts share the same part number and identical electrical specifications. The primary difference is the operating temperature range: Littelfuse operates from -65 to 150°C, while Eaton operates from -55 to 150°C. For applications requiring operation below -55°C, the Littelfuse variant is required.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three parts meet RoHS compliance standards (Littelfuse and Vishay are ROHS3 compliant; Eaton is RoHS compliant), ensuring suitability for modern electronic applications and regulatory requirements.

Q: Can these parts be used interchangeably in the same PCB layout?

A: Yes. All parts are packaged in DO-214AC (SMA) surface-mount form factor with identical pin configurations and footprints, allowing direct substitution without PCB redesign.

Q: What is the moisture sensitivity level for these parts?

A: All three parts have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions and unlimited shelf life under standard storage conditions.