PT4122C Equivalent & Substitute Parts Reference

Part Overview

The PT4122C by Texas Instruments is an isolated module DC-DC converter providing a single output of 5V at up to 4A, with an input range of 36V to 75V, rated at 20W. This part is categorized as obsolete, making it necessary to identify direct substitute models to ensure continued product lifecycle support. Alternatives must strictly match key electrical, mechanical, and regulatory parameters defined for this category.

Substiute Parts

PT4122C

Texas InstrumentsIn Stock: 925PT4122C Datasheet

Current PartRFQ

RP20-4805SFW

Recom PowerIn Stock: 1097RP20-4805SFW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part selection for the PT4122C is defined strictly by the following allowed parameters:

• Isolated DC-DC converter modules
• Single output of 5V at 4A maximum
• Input voltage range encompassing 36V - 75V
• Maximum power output of 20W
• Isolation voltage minimum 1.5 kV
• Comparable features: SCP, UVLO, remote control
• Application scope: ITE (Commercial)
• Environmental and regulatory compliance: ROHS3, REACH, ECCN, and HTSUS matching

Mechanical and mounting considerations (package type, dimensions, and mounting method) must also match or be directly adaptable within design constraints as per provided parameters.

Parameter Comparison

Engineering Selection Recommendations

Selection between PT4122C and RP20-4805SFW is primarily determined by product status and regulatory compliance. PT4122C is obsolete, while RP20-4805SFW is active and maintains comparable compliance with ROHS3, REACH, ECCN EAR99, and HTSUS 8504.40.9580. Substitute selection should utilize only parts classified as active and possessing equivalent certifications and compliance status.

Frequently Asked Questions (FAQ)

Q: What parameters define if a DC-DC converter module is a valid substitute for PT4122C?
A: Key parameters are output voltage (5V), output current (4A), input voltage range (36V–75V), power rating (20W), isolation voltage (minimum 1.5kV), and ITE (Commercial) application classification.

Q: Is the mounting type and package form factor interchangeable between PT4122C and RP20-4805SFW?
A: PT4122C uses a surface mount (6-SMD Module), while RP20-4805SFW is a through hole (6-DIP Module). Compatibility must be determined by the supported mounting and layout in the application per provided form factors.

Q: Does RP20-4805SFW meet or exceed the efficiency and isolation voltage of PT4122C?
A: RP20-4805SFW provides greater efficiency (86% vs 82%) and higher isolation voltage (1.6kV vs 1.5kV) within specified substitution parameters.

Q: Are regulatory and environmental certifications (RoHS, REACH) consistent across both part numbers?
A: Both PT4122C and RP20-4805SFW are ROHS3 Compliant, REACH Unaffected, and share ECCN and HTSUS codes as listed.

Q: What is the impact of operating temperature differences?
A: PT4122C supports a range of -40°C ~ 85°C, while RP20-4805SFW supports -40°C ~ 63°C. Selection must adhere to required end-application ambient conditions within these specified ranges.