PT4142A Equivalent & Substitute Parts Reference

Part Overview

The PT4142A from Texas Instruments is an isolated DC DC converter module that delivers 5V output at up to 4A, with a 20W power rating and an input voltage range of 18V to 40V. The module features a 1.5kV isolation voltage, through-hole right-angle mounting, and is housed in a 6-DIP package. The PT4142A is designated as obsolete. For designs requiring continued availability, identification of substitute models with strictly matching electrical and mechanical parameters is required.

Substiute Parts

PT4142A

Texas InstrumentsIn Stock: 720PT4142A Datasheet

Current PartRFQ

RP20-4805SFW

Recom PowerIn Stock: 1097RP20-4805SFW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is strictly governed by matching electrical and mechanical parameters. The key parameters selected for equivalency are isolated module type, number of outputs, input voltage range, output voltage, maximum output current, power rating, isolation voltage, application area (ITE Commercial), mounting type, package/case, and compliance (RoHS3, MSL, REACH). Only parts meeting all these criteria are included as substitutes.

Parameter Comparison

Engineering Selection Recommendations

When the main part, PT4142A, is obsolete, selection should be based on substitute part RP20-4805SFW only when the part complies fully with the necessary RoHS status, moisture sensitivity level, and REACH requirements specified for the application. Product status as Active for RP20-4805SFW ensures ongoing availability. Only substitute parts meeting all required compliance and certification fields are suitable for selection.

Frequently Asked Questions (FAQ)

Q1: What makes RP20-4805SFW a valid substitute for PT4142A?
A1: RP20-4805SFW matches the isolated module type, output voltage and current, power rating, input voltage parameters, package case, and required compliance standards.

Q2: Are the mounting types identical for PT4142A and RP20-4805SFW?
A2: PT4142A features through-hole, right angle mounting, while RP20-4805SFW offers through-hole mounting. Review mechanical compatibility based on assembly requirements.

Q3: Do both models have the same output characteristics?
A3: Both provide a single isolated output of 5V at 4A.

Q4: What certifications and standards must substitutes meet?
A4: Substitute parts require ROHS3 compliance, MSL level 1, and REACH unaffected status as specified.

Q5: Is the input voltage range for RP20-4805SFW compatible with PT4142A requirements?
A5: Yes. RP20-4805SFW supports an input range of 18V–75V, which encompasses the 18V–40V range of PT4142A.

Q6: Is the physical package size the same between both modules?
A6: Both use a 6-DIP module package; however, dimensions differ. Review mechanical drawings for assembly compatibility.

Q7: Can RP20-4805SFW be used in ITE (Commercial) applications?
A7: Yes, both modules are specified for ITE (Commercial) usage.

Q8: Is there a difference in environmental compliance between the two modules?
A8: Both are ROHS3 compliant and REACH unaffected, with MSL 1 (Unlimited).