MBRB735-E3/45 Equivalent & Substitute Parts

Part Overview

The MBRB735-E3/45 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 35 V DC reverse voltage and 7.5 A average rectified current in a surface mount TO-263AB (D2PAK) package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while supporting the same surface mount package configuration.

Substiute Parts

MBRB735-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1069MBRB735-E3/45 Datasheet

Current PartRFQ

STPS745G-TR

STMicroelectronicsIn Stock: 16137STPS745G-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRB735-E3/45 is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must support a DC reverse voltage (Vr) rating equal to or greater than 35 V. This ensures the diode operates within safe limits in the original circuit application.

Current Rating: The substitute part must support an average rectified current (Io) of 7.5 A or greater to handle the same load conditions.

Forward Voltage Characteristics: The substitute part must maintain forward voltage (Vf) specifications at the specified current level (15 A) to ensure circuit performance consistency.

Recovery Speed: The substitute part must maintain fast recovery characteristics (≤ 500ns, > 200mA) to preserve switching performance in rectification applications.

Reverse Leakage Current: The substitute part must maintain reverse leakage current specifications at the rated voltage to ensure circuit reliability.

Package Compatibility: The substitute part must use the TO-263-3 D2PAK surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Compliance Standards: The substitute part must maintain ROHS3 compliance and MSL 1 rating to meet regulatory and manufacturing requirements.

The STPS745G-TR from STMicroelectronics meets all substitution criteria with enhanced voltage rating and active product status.

Parameter Comparison

Engineering Selection Recommendations

The STPS745G-TR is a direct functional substitute for the obsolete MBRB735-E3/45. Selection of this substitute is supported by the following factors:

Active Product Status: The STPS745G-TR maintains active product status with 16,100 units in stock, ensuring long-term availability and supply chain continuity compared to the obsolete MBRB735-E3/45.

Electrical Equivalence: Both diodes share identical current ratings (7.5 A), forward voltage characteristics (840 mV @ 15 A), and recovery speed specifications (≤ 500ns, > 200mA). The STPS745G-TR provides a higher DC reverse voltage rating (45 V versus 35 V), which is compatible with applications designed for the lower-rated part.

Package Compatibility: Both parts use the TO-263-3 D2PAK surface mount package, enabling direct PCB layout compatibility without redesign.

Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 rating, meeting regulatory and manufacturing requirements without modification to procurement or assembly processes.

Thermal Performance: The STPS745G-TR supports a maximum junction temperature of 175°C compared to 150°C for the MBRB735-E3/45, providing enhanced thermal margin in high-temperature operating environments.

Frequently Asked Questions (FAQ)

Q: Can the STPS745G-TR directly replace the MBRB735-E3/45 in existing designs?

A: Yes. The STPS745G-TR is electrically and mechanically compatible with the MBRB735-E3/45. Both diodes share identical current ratings, forward voltage characteristics, recovery speed, and D2PAK package configuration. The higher voltage rating of the STPS745G-TR (45 V versus 35 V) does not create compatibility issues in circuits designed for the lower-rated part.

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

A: The primary differences are manufacturer (Vishay versus STMicroelectronics), product status (obsolete versus active), DC reverse voltage rating (35 V versus 45 V), and maximum junction temperature (150°C versus 175°C). All other electrical and mechanical specifications are identical.

Q: Does the higher voltage rating of the STPS745G-TR affect circuit performance?

A: No. A higher voltage rating does not negatively affect circuit performance. The diode will operate identically in the original circuit application. The higher voltage rating provides additional design margin and reliability in the same application.

Q: Are there any packaging differences between these parts?

A: No. Both parts use the TO-263-3 D2PAK surface mount package with identical pinout and mechanical dimensions. No PCB layout modifications are required for substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the MBRB735-E3/45 and STPS745G-TR are ROHS3 compliant with MSL 1 rating. No changes to procurement, handling, or assembly processes are required.

Q: What is the availability status of each part?

A: The MBRB735-E3/45 is obsolete with 1,051 units in stock. The STPS745G-TR is an active product with 16,100 units in stock, ensuring reliable long-term supply for production and maintenance applications.

Q: Are the forward voltage characteristics identical?

A: Yes. Both diodes specify 840 mV maximum forward voltage at 15 A, ensuring identical voltage drop performance in rectification circuits.

Q: Do both parts support the same current rating?

A: Yes. Both diodes are rated for 7.5 A average rectified current, supporting identical load conditions in the original application.