PT5401A Equivalent & Substitute Parts Reference

Part Overview

The Texas Instruments PT5401A is a Non-Isolated PoL Module DC-DC converter that provides a regulated 3.3V output at up to 6A from a 4.5V to 5.5V input. This module, part of the Excalibur™ PT5400 Series, is designed for ITE (commercial) applications and features undervoltage lockout (UVLO), ROHS3 compliance, and a through-hole, right-angle mounting style. The PT5401A is classified as obsolete, making it necessary to identify substitute parts that maintain acceptable electrical and mechanical compatibility within the allowed key parameters.

Substiute Parts

PT5401A

Texas InstrumentsIn Stock: 662PT5401A Datasheet

Current PartRFQ

R-78AA3.3-1.0SMD

Recom PowerIn Stock: 2265R-78AA3.3-1.0SMD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are grouped based on strict adherence to the following key allowed parameters for DC-DC converter modules:

• Number of Outputs
• Output Voltage
• Input Voltage Range
• Maximum Output Current
• Application (ITE - Commercial)
• Operating Temperature Range
• Compliance Status (RoHS3, REACH)
• Product Status

Only substitute parts matching or falling within these electrical and regulatory parameters are listed as alternatives.

Parameter Comparison

Engineering Selection Recommendations

The PT5401A is classified as obsolete. Substitute selection is based on RoHS3 compliance and similar certification status (such as REACH unaffected), as well as product availability. Only parts meeting provided regulatory criteria and matching stated key electrical parameters are included in substitution consideration.

Frequently Asked Questions (FAQ)

Q: What are the primary criteria for selecting a substitute for PT5401A?
A: Substitute selection is based strictly on parameters including output voltage, number of outputs, input voltage range, maximum output current, application type, operating temperature, and compliance status.

Q: Is matching the package and mounting style required for substitution?
A: The substitute list includes package and mounting type, but only those explicitly provided in the parameters. Compatibility with the original package must be confirmed for mechanical and assembly constraints.

Q: Are there differences in input voltage range and output current between PT5401A and R-78AA3.3-1.0SMD?
A: Yes. PT5401A supports 4.5V to 5.5V input and 6A output current; R-78AA3.3-1.0SMD supports 4.75V to 18V input with 1A maximum output.

Q: What compliance certifications are required for substitute parts?
A: Only RoHS3 compliant and REACH unaffected parts are considered valid substitutes as per provided input parameters.

Q: Can the substitute be used in the same application environment as PT5401A?
A: Substitute parts that match the ITE (Commercial) application and the specified operating temperature range are included based on provided data.