P4SMA11A Equivalent & Substitute Parts

Part Overview

The P4SMA11A 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 9.4V reverse standoff voltage and 15.6V maximum clamping voltage. The part is currently in active production status with extensive inventory availability. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, procurement preferences, or design standardization across manufacturing sources.

Substiute Parts

P4SMA11A

Littelfuse Inc.In Stock: 300305P4SMA11A Datasheet

Current PartRFQ

P4SMA11A

Eaton - Electronics DivisionIn Stock: 300231P4SMA11A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA11A is determined by strict equivalence across the following critical parameters:

Voltage specifications must match exactly: 9.4V reverse standoff, 10.5V minimum breakdown, and 15.6V maximum clamping voltage. Current handling capability must equal or exceed 26.3A peak pulse current. Power dissipation must support 400W peak pulse rating. Package and mounting type must remain DO-214AC (SMA) surface mount to ensure PCB compatibility without layout modifications. Device type must be Zener with single unidirectional channel configuration. Operating temperature range must encompass the specified -65°C to 150°C junction temperature window or be compatible with the application's actual operating conditions.

The identified substitute part maintains identical electrical performance and mechanical compatibility with the original P4SMA11A specification.

Parameter Comparison

Engineering Selection Recommendations

The P4SMA11A from Eaton - Electronics Division is electrically and mechanically equivalent to the Littelfuse P4SMA11A for applications operating within the -55°C to 150°C temperature range. Both parts are RoHS compliant and carry identical ECCN and HTSUS classifications, supporting equivalent regulatory and trade compliance requirements. Selection between manufacturers should be based on procurement availability, supply chain strategy, and cost considerations. The Eaton variant exhibits a narrower minimum operating temperature specification (-55°C versus -65°C), which may be a limiting factor for applications requiring extended low-temperature performance below -55°C.

Frequently Asked Questions (FAQ)

Q: Can the Eaton P4SMA11A replace the Littelfuse P4SMA11A in all applications?

A: The Eaton part provides identical electrical performance and package compatibility. However, the operating temperature minimum is -55°C compared to Littelfuse's -65°C. Substitution is valid for applications operating above -55°C junction temperature.

Q: Are there any package or footprint differences between these parts?

A: Both parts use the DO-214AC (SMA) surface mount package with identical mechanical specifications. PCB footprints and reflow profiles remain unchanged.

Q: What are the critical parameters that must match for TVS diode substitution?

A: Reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current rating, power dissipation capability, and package type must all match or exceed the original specification. Operating temperature range must be compatible with the application environment.

Q: Do both parts meet the same compliance standards?

A: Both parts are RoHS compliant with MSL Level 1 (Unlimited moisture sensitivity). ECCN and HTSUS codes are identical, supporting equivalent export and trade compliance.

Q: What is the significance of the 10°C difference in minimum operating temperature?

A: The Littelfuse part operates to -65°C while the Eaton part operates to -55°C. For applications with junction temperatures below -55°C, the Littelfuse part is required. For applications above -55°C, both parts are functionally equivalent.