STPS3045FP Equivalent & Substitute Parts

Part Overview

The STPS3045FP is a Schottky rectifier diode manufactured by STMicroelectronics, rated for 45 V DC reverse voltage and 30 A average rectified current in a Through Hole TO-220FPAC package. This component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. Equivalent parts must maintain electrical performance within the specified voltage and current ratings while accommodating available packaging and thermal characteristics.

Substiute Parts

STPS3045FP

STMicroelectronicsIn Stock: 847STPS3045FP Datasheet

Current PartRFQ

VFT4045BP-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 4861VFT4045BP-M3/4W Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS3045FP is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: The substitute part must maintain a DC reverse voltage rating of 45 V or greater to ensure safe operation within the original circuit design envelope.

Current Rating Compatibility: The substitute part must support an average rectified current rating equal to or exceeding 30 A to handle the specified load without thermal or electrical stress.

Technology Requirement: Schottky diode technology is mandatory to preserve the fast recovery characteristics and forward voltage performance of the original design.

Mounting and Package Compatibility: Through Hole mounting with TO-220-2 Full Pack configuration ensures mechanical and thermal interface compatibility with existing PCB layouts and heat dissipation infrastructure.

Speed Characteristic: Fast Recovery performance with switching time ≤ 500 ns at currents > 200 mA is required to maintain circuit switching performance and efficiency.

Compliance Requirements: RoHS3 compliance is mandatory for regulatory alignment with the original component specification.

The VFT4045BP-M3/4W from Vishay General Semiconductor meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The VFT4045BP-M3/4W is a direct functional substitute for the STPS3045FP based on the following engineering criteria:

Electrical Equivalence: Both components share identical 45 V DC reverse voltage ratings and Fast Recovery Schottky technology. The VFT4045BP-M3/4W is rated for 40 A average rectified current, which exceeds the 30 A requirement of the original design, providing operational margin.

Thermal Performance: The substitute component features a maximum junction temperature rating of 200°C compared to 175°C for the original part, enabling improved thermal headroom in high-temperature operating environments.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH Unaffected status, ensuring continued regulatory alignment for new designs and procurement.

Product Availability: The STPS3045FP is classified as Obsolete, while the VFT4045BP-M3/4W is Active status with 4786 units in stock, ensuring reliable long-term supply chain continuity.

Package Compatibility: Both components utilize Through Hole mounting in TO-220-2 Full Pack configuration. The substitute offers an Isolated Tab option, which provides additional design flexibility for thermal management and electrical isolation applications.

Frequently Asked Questions (FAQ)

Q: Can the VFT4045BP-M3/4W directly replace the STPS3045FP in existing circuit designs?

A: Yes. Both components share identical voltage ratings (45 V), equivalent fast recovery switching characteristics, and compatible Through Hole TO-220-2 Full Pack mounting. The substitute's higher current rating (40 A vs. 30 A) and elevated junction temperature rating (200°C vs. 175°C) provide operational margin without circuit modification.

Q: What is the significance of the higher reverse leakage current in the VFT4045BP-M3/4W?

A: The VFT4045BP-M3/4W exhibits 3 mA reverse leakage at 45 V compared to 300 µA for the STPS3045FP. This difference reflects manufacturing process variations between manufacturers. For most rectification applications, this leakage remains negligible relative to forward current operation. Circuit designs with specific leakage-sensitive requirements must evaluate this parameter against application thresholds.

Q: Does the Isolated Tab option on the VFT4045BP-M3/4W affect mechanical compatibility?

A: The Isolated Tab is an optional feature that does not affect standard Through Hole mounting compatibility. Designs utilizing the isolated tab benefit from enhanced thermal management and electrical isolation capabilities. Designs not requiring isolation function identically with standard tab configurations.

Q: Are there thermal management differences between these components?

A: The VFT4045BP-M3/4W supports a maximum junction temperature of 200°C versus 175°C for the STPS3045FP. Both components utilize identical TO-220-2 Full Pack thermal interfaces. The substitute's higher thermal rating provides additional operational margin in thermally constrained applications.

Q: What forward voltage differences should be considered during substitution?

A: The STPS3045FP specifies 620 mV maximum forward voltage at 30 A, while the VFT4045BP-M3/4W specifies 670 mV at 40 A. At the original 30 A operating point, the substitute's forward voltage remains within acceptable rectification performance parameters. Power dissipation calculations should account for the slightly higher forward voltage characteristic.

Q: Is the substitute part available for immediate procurement?

A: Yes. The VFT4045BP-M3/4W is classified as Active product status with 4786 units in stock, ensuring immediate availability. The original STPS3045FP is Obsolete, making the substitute the recommended procurement choice for new designs and ongoing production requirements.