P4SMA27A Equivalent & Substitute Parts

Part Overview

The P4SMA27A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AC (SMA) package. This component provides transient voltage protection with a 23.1V reverse standoff voltage and 37.5V maximum clamping voltage. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

P4SMA27A

Littelfuse Inc.In Stock: 1979P4SMA27A Datasheet

Current PartRFQ

P4SMA27A

Eaton - Electronics DivisionIn Stock: 1977P4SMA27A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA27A is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 23.1V
• Voltage - Breakdown (Min): 25.7V
• Voltage - Clamping (Max) @ Ipp: 37.5V
• Current - Peak Pulse (10/1000µs): 10.9A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Type: Zener
• Unidirectional Channels: 1

The identified substitute part maintains identical electrical performance specifications and package compatibility, ensuring direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse Inc. P4SMA27A and the Eaton - Electronics Division P4SMA27A are active production components with full regulatory compliance. Selection between these parts is based on:

• Procurement availability and lead time requirements
• Supply chain preferences and established vendor relationships
• Operating temperature range requirements: The Littelfuse version supports -65°C minimum junction temperature, while the Eaton version supports -55°C minimum
• Compliance certifications: Both parts meet RoHS and REACH requirements; Littelfuse carries ROHS3 designation while Eaton carries RoHS designation

For applications requiring the full -65°C to 150°C operating range, the Littelfuse P4SMA27A is the specified choice. For applications within the -55°C to 150°C range, either part is functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can the Eaton P4SMA27A replace the Littelfuse P4SMA27A in all applications?

A: The Eaton part is electrically and mechanically equivalent for applications operating within the -55°C to 150°C temperature range. Applications requiring operation below -55°C junction temperature must use the Littelfuse version.

Q: Are the package dimensions identical between these parts?

A: Both parts use the DO-214AC (SMA) package with identical mechanical specifications, ensuring direct PCB footprint compatibility.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching voltage ratings (23.1V standoff, 25.7V breakdown minimum, 37.5V clamping maximum), peak pulse current (10.9A), peak pulse power (400W), and package type (DO-214AC, SMA).

Q: Are there any compliance differences between these parts?

A: Both parts are REACH Unaffected and carry MSL 1 (Unlimited) ratings. The Littelfuse part carries ROHS3 compliance while the Eaton part carries RoHS compliance; both meet current regulatory requirements.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes, both parts share identical DO-214AC (SMA) package specifications and electrical performance within their respective operating temperature ranges, allowing direct substitution at the component level.