PT4143C Equivalent & Substitute Parts Reference

Part Overview

Texas Instruments PT4143C is an obsolete isolated DC-DC converter module, part of the PT4140 (20W) series. It offers 12V output at up to 1.6A from an 18V–40V input range, with 1.5kV isolation. The PT4143C is RoHS3 compliant, surface mount, and operates from -40°C to 85°C. Alternate models are required due to product obsolescence, supply chain availability, or updated mechanical/electrical requirements within the same performance category.

Substiute Parts

PT4143C

Texas InstrumentsIn Stock: 1516PT4143C Datasheet

Current PartRFQ

RP20-4812SFW

Recom PowerIn Stock: 713RP20-4812SFW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Equivalent and substitute DC-DC converter modules are identified strictly by matching key electrical and mechanical parameters. These parameters are: isolated module type, one output, 12V output voltage, similar or higher input voltage range covering 18–40V, at least 1.6A output current, 20W output power, comparable isolation voltage, identical or greater efficiency, RoHS3 and REACH compliance, similar or compatible mounting type and package, and matching MSL. All listed substitute parts match these constraints as documented in their manufacturer part numbers and supplied datasheets.

Strictly controlled parameters for substitution:

• Module type (Isolated)
• Number of Outputs (1)
• Input Voltage Range
• Output Voltage and Current
• Output Power
• Isolation Voltage
• Efficiency
• Operating Temperature Range
• RoHS & REACH Compliance
• Mounting Type & Package/Case
• Moisture Sensitivity Level

Parameter Comparison

Engineering Selection Recommendations

Texas Instruments PT4143C is obsolete. Recom Power RP20-4812SFW is documented as meeting or exceeding all relevant compliance standards, including RoHS3 and REACH unaffected status, and both feature an unlimited MSL rating. Selection is enabled strictly by matching or exceeding mandatory functional parameters and compliance, without the introduction of unlisted or inferred criteria.

Frequently Asked Questions (FAQ)

Q: What are the primary criteria for substituting the PT4143C DC-DC converter?
A: Substitution requires identical or broader input voltage range, matching 12V output, at least 1.6A output current, minimum 20W power, equivalent isolation voltage, same number of outputs, and similar form factor and mounting type if mechanical constraints are relevant.

Q: Does the substitute part RP20-4812SFW maintain full compliance for regulated industry use?
A: Yes. Both PT4143C and RP20-4812SFW are RoHS3 compliant and REACH unaffected, fulfilling industry environmental and materials regulations.

Q: Are the mounting types and package dimensions identical between PT4143C and RP20-4812SFW?
A: No. PT4143C is surface mount with an 8-SMD module package. RP20-4812SFW is through hole with a 6-DIP module package. Compare dimensions and mounting type directly with system mechanical requirements.

Q: Can the output characteristics of the substitute part exceed those of the original?
A: Yes, allowed parameters in this comparison show RP20-4812SFW supports up to 1.67A (versus 1.6A) and an extended input range, fitting the required design window.

Q: Do both modules support use in ITE (Commercial) applications?
A: Yes. Both PT4143C and RP20-4812SFW are specified for ITE (Commercial) applications.