PT5103C Equivalent & Substitute Parts Reference

Part Overview

The Texas Instruments PT5103C is a DC DC converter designed as a linear regulator replacement, providing 1 output at 3.3V with up to 1A current, and supporting a 9V to 26V input range. It delivers 3W of power and operates within an industrial temperature range, featuring OCP (Overcurrent Protection) and OTP (Overtemperature Protection). The product is classified as obsolete, necessitating the identification of suitable substitute parts for continued designs or maintenance.

Substiute Parts

PT5103C

Texas InstrumentsIn Stock: 1241PT5103C Datasheet

Current PartRFQ

R-78C3.3-1.0

Recom PowerIn Stock: 59709R-78C3.3-1.0 Datasheet

MFR RecommendedRFQ

R-78T3.3-1.0/AC-TRAY

Recom PowerIn Stock: 979R-78T3.3-1.0/AC-TRAY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution has been determined strictly by the following key parameters required for interchangeability:

• Type: Linear Regulator Replacement or equivalent module
• Number of Outputs: 1
• Output Voltage: 3.3V
• Max Output Current: 1A
• Input Voltage Range: Must cover 9V–26V
• Power Rating: ≥3 W
• Mounting Type and Package: Compatibility is noted, with both surface mount and through hole options included
• Operating Temperature: -40°C ~ 85°C
• Compliance: RoHS3, REACH, MSL 1, ECCN EAR99, HTSUS 8504.40.9580

Only parts matching or exceeding these specifications have been included as substitutes.

Parameter Comparison

Engineering Selection Recommendations

PT5103C is obsolete and is no longer in active production. Both the Recom Power R-78C3.3-1.0 and R-78T3.3-1.0/AC-TRAY are active and adhere to the same industry compliance statuses: RoHS3 Compliant, MSL 1, REACH Unaffected, ECCN EAR99, and HTSUS 8504.40.9580. Substitute selection may be made using only these compliance and regulatory fields.

Frequently Asked Questions (FAQ)

Q: What criteria must a substitute part meet for PT5103C?
A: To be a substitute for PT5103C, a part must have 1 output, a 3.3V output at up to 1A, support a 9V–26V input range or broader, deliver at least 3W, be compatible with industrial temperature range (-40°C ~ 85°C), and share similar compliance certifications.

Q: Are mounting type and package the same for all substitutes?
A: PT5103C and R-78T3.3-1.0/AC-TRAY use surface mount packages. The R-78C3.3-1.0 uses a through hole (SIP) package. Mechanical compatibility should be checked.

Q: Are the recommended substitutes compliant with environmental and trade regulations?
A: All listed substitutes—R-78C3.3-1.0 and R-78T3.3-1.0/AC-TRAY—match PT5103C in RoHS3 compliance, MSL, REACH, ECCN, and HTSUS classifications.

Q: Can the substitute parts be used in the same application environment?
A: All selected substitutes are suitable for ITE (Commercial) applications, support -40°C ~ 85°C, and offer the required output and input voltage ranges.

Q: Does efficiency or additional features affect substitution?
A: Only parameters explicitly provided, such as efficiency and defined features, have been considered. Both substitutes meet or exceed the PT5103C efficiency.

Q: How is output compatibility ensured?
A: Output voltage, current, and power ratings in all substitute parts meet or exceed the corresponding parameters in PT5103C.