STPS1045SFY Equivalent & Substitute Parts

Part Overview

The STPS1045SFY is an active Schottky rectifier diode manufactured by STMicroelectronics, rated for 45 V DC reverse voltage and 10 A average rectified current in a surface mount TO-277A package. This component is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH regulations. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter ranges.

Substiute Parts

STPS1045SFY

STMicroelectronicsIn Stock: 4363STPS1045SFY Datasheet

Current PartRFQ

FSV2050V

onsemiIn Stock: 15279FSV2050V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS1045SFY is permissible when the alternative component meets or exceeds the following critical parameters:

Mandatory Compatibility Criteria:

• Technology: Schottky diode
• Package / Case: TO-277, 3-PowerDFN (surface mount, same footprint)
• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 45 V
• Current - Average Rectified (Io): Equal to or greater than 10 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The FSV2050V from onsemi satisfies all mandatory compatibility criteria. It provides higher voltage rating (50 V) and higher current capacity (20 A), ensuring functional equivalence with enhanced performance margins. Both components share identical package geometry, fast recovery speed classification, and equivalent environmental compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

STPS1045SFY Selection: The STPS1045SFY is the primary component choice when the design requires STMicroelectronics ECOPACK®2 series qualification, automotive AEC-Q101 certification, or when the specified 45 V / 10 A rating exactly matches circuit requirements. This component is active and maintains full inventory availability.

FSV2050V Selection: The FSV2050V is a functionally equivalent substitute when component availability is constrained or when design flexibility permits higher voltage and current ratings. The FSV2050V provides 50 V reverse voltage and 20 A current capacity, both exceeding STPS1045SFY specifications. Both components are ROHS3 compliant, MSL 1 rated, and maintain active product status. The FSV2050V operates across a wider low-temperature range (-55°C minimum versus -40°C), though the maximum junction temperature is 150°C compared to 175°C for the STPS1045SFY. Package geometry and fast recovery speed characteristics are identical, ensuring direct footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the FSV2050V directly replace the STPS1045SFY on the PCB?

A: Yes. Both components use identical TO-277, 3-PowerDFN package geometry and surface mount configuration. Pin assignments and footprint dimensions are compatible for direct substitution without PCB layout modification.

Q: What are the key differences between these two diodes?

A: The FSV2050V provides higher voltage rating (50 V versus 45 V) and higher current capacity (20 A versus 10 A). Reverse leakage current is higher in the FSV2050V (320 µA @ 50 V versus 50 µA @ 45 V). Maximum junction temperature differs: STPS1045SFY operates to 175°C while FSV2050V operates to 150°C. Both share identical fast recovery speed classification and package type.

Q: Are both components automotive qualified?

A: The STPS1045SFY carries AEC-Q101 automotive qualification. The FSV2050V does not list AEC-Q101 qualification in the provided specifications. If automotive qualification is a design requirement, the STPS1045SFY is the specified choice.

Q: Do both components meet RoHS and REACH compliance?

A: Yes. Both STPS1045SFY and FSV2050V are ROHS3 compliant and REACH unaffected, meeting current environmental regulatory requirements.

Q: What is the moisture sensitivity level for these components?

A: Both components are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can the FSV2050V be used in applications requiring the full -40°C to 175°C temperature range?

A: No. The FSV2050V maximum junction temperature is 150°C, which is below the STPS1045SFY maximum of 175°C. If the application requires operation at temperatures above 150°C, the STPS1045SFY must be used.

Q: Are there any electrical performance differences that affect circuit operation?

A: Both components meet the fast recovery speed specification (≤ 500ns, > 200mA). The FSV2050V exhibits higher reverse leakage current at its rated voltage. For circuits sensitive to leakage current, the STPS1045SFY provides lower leakage performance. For applications where the 10 A current rating is adequate, both components function equivalently.