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PT4144C Equivalent & Substitute Parts Reference
Part Overview
The PT4144C from Texas Instruments is an isolated DC-DC converter module delivering a single output of 15V at up to 1.3A, intended for ITE (Commercial) applications. This module forms part of the PT4140 (20W) series and features an input voltage range of 18V to 40V, 20W power rating, 1.5 kV isolation, and is designed for surface mount installation. The PT4144C is currently classified as obsolete, making it necessary to identify equivalent or substitute models that comply with the same key electrical and mechanical parameters for continued system availability and support.
Substiute Parts
Key Parameters
| Manufacturer Part Number | Manufacturer | Series | Type | Number of Outputs | Voltage - Input (Min) | Voltage - Input (Max) | Voltage - Output 1 | Current - Output (Max) | Power (Watts) | Voltage - Isolation | Efficiency | Operating Temperature | Mounting Type | Package / Case | Size / Dimension | RoHS Status | MSL | REACH Status | Product Status |
|---|
Substitute Part Grouping Explanation
Substitute selection is strictly determined by the following parameters:
- Output Voltage: 15V (single output)
- Output Current: Minimum of 1.3A
- Input Voltage Range: 18V up to at least 40V
- Power Rating: 20W minimum
- Isolation Voltage: At least 1.5 kV
- Efficiency: 86%
- Application: ITE (Commercial)
- Compliance: RoHS3, REACH, ECCN, HTSUS
- Mounting and package requirements
- Operating Temperature: Must overlap with specified range
Only modules meeting these criteria are considered suitable equivalents for direct replacement in existing designs or for ongoing procurement due to the obsolete status of PT4144C.
Parameter Comparison
| Parameter | PT4144C | RP20-4815SFW |
|---|---|---|
| Manufacturer | Texas Instruments | Recom Power |
| Series | PT4140 (20W) | POWERLINE RP20-FW (20W) |
| Type | Isolated Module | Isolated Module |
| Number of Outputs | 1 | 1 |
| Voltage - Input (Min) | 18V | 18V |
| Voltage - Input (Max) | 40V | 75V |
| Voltage - Output 1 | 15V | 15V |
| Current - Output (Max) | 1.3A | 1.33A |
| Power (Watts) | 20 W | 20 W |
| Voltage - Isolation | 1.5 kV | 1.6 kV |
| Efficiency | 86% | 86% |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 63°C |
| Mounting Type | Surface Mount | Through Hole |
| Package / Case | 8-SMD Module, 6 Leads | 6-DIP Module |
| Size / Dimension | 1.67" L x 1.48" W x 0.34" H (42.4mm x 37.6mm x 8.6mm) | 2.00" L x 1.00" W x 0.40" H (50.8mm x 25.4mm x 10.2mm) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
Selection is determined by product status, compliance, and environmental certification. The PT4144C is obsolete, and RP20-4815SFW is active with ROHS3 and REACH certifications, ECCN classification of EAR99, and conforms to the required power, voltage, and output specifications. Substitute models listed comply with inventory, regulatory, and technical requirements based on the provided parameters.
Frequently Asked Questions (FAQ)
Q1: What are the necessary parameters for direct substitution of PT4144C?
A1: Key parameters are output voltage (15V), output current (≥1.3A), input voltage range (≥18V-40V), isolation voltage (≥1.5kV), efficiency (86%), and regulatory compliance.
Q2: How should mounting type and package be considered in substitution?
A2: Substitutes must be evaluated for compatibility regarding mounting type (surface mount versus through hole) and physical dimensions, as these affect board layout.
Q3: Are there differences in input voltage ranges between PT4144C and RP20-4815SFW?
A3: RP20-4815SFW supports a broader input voltage range (18V to 75V), which exceeds the PT4144C minimum and maximum requirements.
Q4: Is there a difference in operating temperature range?
A4: PT4144C supports -40°C to 85°C, while RP20-4815SFW is specified for -40°C to 63°C.
Q5: What compliance certifications do the substitutes hold?
A5: Both PT4144C and RP20-4815SFW are ROHS3 compliant and REACH unaffected. MSL for both is 1 (Unlimited). ECCN and HTSUS codes are the same.
Q6: Is the isolation voltage sufficient for substitution?
A6: RP20-4815SFW has an isolation voltage of 1.6kV, meeting and exceeding the PT4144C requirement of 1.5kV.
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