FYPF0545STU Equivalent & Substitute Parts

Part Overview

The FYPF0545STU is a Schottky diode manufactured by onsemi, rated for 45 V DC reverse voltage and 5 A average rectified current in a Through Hole TO-220-2 package configuration. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Substiute Parts

FYPF0545STU

onsemiIn Stock: 1116FYPF0545STU Datasheet

Current PartRFQ

MBRF745-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 2259MBRF745-E3/45 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FYPF0545STU is determined by the following critical electrical and mechanical parameters:

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

Current Rating: The substitute part must support an average rectified current of 5 A or greater. Parts with higher current ratings provide design margin and extended operational capability.

Technology Type: Both the main part and substitute must utilize Schottky diode technology to maintain consistent forward voltage characteristics and switching speed performance.

Mounting Configuration: The substitute part must be Through Hole mounted to ensure mechanical compatibility with existing printed circuit board layouts and assembly processes.

Package Type: The substitute part must utilize a TO-220-2 package configuration or equivalent isolated tab variant to maintain thermal management and electrical isolation properties.

Operating Temperature Range: The substitute part must support the junction temperature range of -65°C to 150°C to ensure reliability across specified environmental conditions.

Speed Classification: The substitute part must maintain Fast Recovery characteristics with switching times ≤ 500ns at currents > 200mA to preserve circuit performance.

The MBRF745-E3/45 meets all substitution criteria with equivalent or superior electrical ratings and active product status.

Parameter Comparison

Engineering Selection Recommendations

The MBRF745-E3/45 is a direct substitute for the obsolete FYPF0545STU based on the following engineering criteria:

Product Status: The MBRF745-E3/45 maintains active product status with current manufacturing availability, eliminating supply chain risk associated with the obsolete FYPF0545STU.

Electrical Equivalence: Both parts share identical DC reverse voltage ratings (45 V) and Fast Recovery speed classifications (≤ 500ns). The substitute part's higher current rating (7.5 A versus 5 A) provides design margin without introducing incompatibility.

Regulatory Compliance: Both parts maintain REACH Unaffected status and EAR99 ECCN classification, ensuring equivalent compliance posture for export and environmental regulations.

Thermal Management: Identical operating temperature ranges (-65°C to 150°C) ensure equivalent thermal performance and reliability across specified environmental conditions.

Packaging Compatibility: Both parts utilize Through Hole mounting in TO-220-2 package configurations. The substitute's isolated tab feature provides enhanced electrical isolation without compromising mechanical compatibility.

Moisture Sensitivity: Both parts maintain MSL 1 (Unlimited) classification, indicating equivalent moisture handling requirements and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the MBRF745-E3/45 directly replace the FYPF0545STU in existing circuit designs?

A: Yes. Both parts share identical voltage ratings (45 V), speed classifications (Fast Recovery ≤ 500ns), and operating temperature ranges (-65°C to 150°C). The substitute's higher current rating (7.5 A) provides design margin for the original 5 A specification. Through Hole mounting and TO-220-2 package compatibility ensure mechanical interchangeability.

Q: What is the significance of the MBRF745-E3/45 having a higher current rating?

A: The 7.5 A rating of the MBRF745-E3/45 exceeds the 5 A requirement of the FYPF0545STU. This higher rating provides operational margin and extended thermal headroom without introducing circuit incompatibility. The substitute part can safely handle the original design's current demands with reduced thermal stress.

Q: How do the forward voltage characteristics compare between these parts?

A: The FYPF0545STU specifies 550 mV maximum forward voltage at 5 A, while the MBRF745-E3/45 specifies 840 mV maximum at 15 A. These measurements occur at different test conditions. The substitute's lower reverse leakage current (100 µA versus 1 mA at 45 V) indicates superior junction quality and reduced power dissipation in standby conditions.

Q: Are there packaging differences that affect circuit board layout?

A: Both parts utilize Through Hole TO-220-2 package configurations with identical mechanical footprints. The MBRF745-E3/45 includes an isolated tab feature, which enhances electrical isolation. This feature does not compromise mechanical compatibility and may provide additional design flexibility for thermal management applications.

Q: What is the impact of the substitute part's active product status?

A: The MBRF745-E3/45 maintains active manufacturing status, ensuring long-term availability and supply chain stability. The FYPF0545STU's obsolete classification creates procurement risk and potential design discontinuation. Substitution to an active part eliminates these supply chain concerns.

Q: Do both parts meet the same regulatory and compliance requirements?

A: Yes. Both parts maintain REACH Unaffected status, EAR99 ECCN classification, and MSL 1 (Unlimited) moisture sensitivity levels. Regulatory and environmental compliance postures are equivalent, with no additional certification or documentation requirements for substitution.

Q: Can the substitute part be used in high-temperature applications?

A: Yes. Both parts support identical operating temperature ranges from -65°C to 150°C junction temperature. The MBRF745-E3/45 maintains equivalent thermal performance and reliability across this full range, making it suitable for high-temperature circuit environments.