MBRF735-E3/45 Equivalent & Substitute Parts

Part Overview

The MBRF735-E3/45 is a Schottky rectifier diode rated for 35 V DC reverse voltage and 7.5 A average rectified current in a through-hole TO-220-2 package with isolated tab. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part is manufactured by Vishay General Semiconductor - Diodes Division and is ROHS3 compliant with unlimited moisture sensitivity level.

Substiute Parts

MBRF735-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 829MBRF735-E3/45 Datasheet

Current PartRFQ

MBRF745-E3/45

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

MFR RecommendedRFQ

STPS745FP

STMicroelectronicsIn Stock: 2081STPS745FP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBRF735-E3/45 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Technology: Schottky diode
• Current - Average Rectified (Io): 7.5 A
• Voltage - Forward (Vf) (Max) @ If: 840 mV @ 15 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 100 µA
• Mounting Type: Through Hole
• Package / Case: TO-220-2 Full Pack configuration

Allowable Parameter Variance:

• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 35 V
• Operating Temperature - Junction: Equal to or greater than 150°C maximum

The MBRF735-E3/45 has two qualified substitutes that meet or exceed all critical electrical parameters while maintaining mechanical compatibility with the original through-hole TO-220-2 package footprint.

Parameter Comparison

Engineering Selection Recommendations

MBRF745-E3/45 (Vishay General Semiconductor - Diodes Division)

The MBRF745-E3/45 is the manufacturer-recommended substitute for the obsolete MBRF735-E3/45. This part maintains identical electrical performance across all critical parameters while providing a higher voltage rating of 45 V versus the original 35 V. The MBRF745-E3/45 is in active production status, ensuring long-term availability and supply chain continuity. Both parts share the same base product family (MBRF7 series) and are packaged identically in TO-220-2 Full Pack with isolated tab configuration. ROHS3 compliance and unlimited moisture sensitivity level are maintained.

STPS745FP (STMicroelectronics)

The STPS745FP is a direct functional equivalent offering identical electrical performance to the MBRF735-E3/45 across all critical parameters. This part is manufactured by STMicroelectronics and is in active production. The STPS745FP provides an enhanced maximum junction temperature rating of 175°C compared to 150°C for the original part. The package is TO-220-2 Full Pack configuration, maintaining mechanical compatibility with the original through-hole footprint. ROHS3 compliance and unlimited moisture sensitivity level are maintained.

Both substitute parts are suitable for direct replacement in applications where the MBRF735-E3/45 was originally specified. Selection between the two substitutes depends on supplier availability, procurement lead times, and design team preference for manufacturer sourcing strategy.

Frequently Asked Questions (FAQ)

Q: Can the MBRF745-E3/45 be used as a direct replacement for the MBRF735-E3/45?

A: Yes. The MBRF745-E3/45 meets all electrical performance requirements of the MBRF735-E3/45 and maintains identical package configuration. The higher voltage rating (45 V versus 35 V) provides additional design margin without affecting circuit operation in applications rated for 35 V operation.

Q: What is the difference between the MBRF745-E3/45 and STPS745FP?

A: Both parts provide identical electrical performance and are mechanically compatible with the original MBRF735-E3/45 footprint. The primary differences are manufacturer (Vishay versus STMicroelectronics) and maximum junction temperature rating (150°C for MBRF745-E3/45 versus 175°C for STPS745FP). Selection depends on supplier availability and design requirements.

Q: Are the package configurations identical between all three parts?

A: The MBRF735-E3/45 and MBRF745-E3/45 are packaged in TO-220-2 Full Pack with isolated tab. The STPS745FP is packaged in TO-220-2 Full Pack. Both configurations are mechanically compatible with the original through-hole footprint and PCB layout.

Q: Why is the MBRF735-E3/45 classified as obsolete?

A: The MBRF735-E3/45 has been discontinued by the manufacturer. The MBRF745-E3/45 serves as the active replacement within the Vishay product line, offering improved voltage rating and continued production support.

Q: Do the substitute parts maintain the same compliance certifications?

A: Yes. Both MBRF745-E3/45 and STPS745FP are ROHS3 compliant, REACH unaffected, and carry unlimited moisture sensitivity level (MSL 1), matching the compliance profile of the original MBRF735-E3/45.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by matching or exceeding the following parameters: Schottky technology, 7.5 A average rectified current, 840 mV forward voltage at 15 A, fast recovery speed (≤ 500ns), 100 µA reverse leakage current, and through-hole TO-220-2 package configuration. Voltage rating and maximum junction temperature may be equal to or greater than the original specification.