MBRB735 Equivalent & Substitute Parts

Part Overview

The MBRB735 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, making identification of equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across a junction temperature range of -65°C to 150°C and exhibits fast recovery characteristics suitable for high-frequency rectification applications.

Substiute Parts

MBRB735

Vishay General Semiconductor - Diodes DivisionIn Stock: 7912MBRB735 Datasheet

Current PartRFQ

STPS745G-TR

STMicroelectronicsIn Stock: 16137STPS745G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRB735 is based on electrical and mechanical parameter compatibility within the Schottky rectifier diode category. The primary substitution criteria are:

Electrical Compatibility:

• Current rating: Minimum 7.5 A average rectified current (Io)
• Voltage rating: Minimum 35 V DC reverse voltage (Vr)
• Forward voltage: Maximum 840 mV @ 15 A
• Recovery speed: Fast recovery ≤ 500ns, > 200mA (Io)
• Reverse leakage: Maximum 100 µA at rated voltage

Mechanical Compatibility:

• Package type: TO-263-3 / D2PAK (2 Leads + Tab)
• Mounting type: Surface Mount

The STPS745G-TR meets or exceeds all electrical parameters of the MBRB735 while maintaining identical mechanical compatibility. The substitute part provides higher voltage rating (45 V vs. 35 V) and extended maximum junction temperature (175°C vs. 150°C), enabling direct substitution in applications requiring the MBRB735.

Parameter Comparison

Engineering Selection Recommendations

The STPS745G-TR is the direct substitute for the obsolete MBRB735. Selection is based on the following engineering factors:

Product Status: The MBRB735 is classified as obsolete, while the STPS745G-TR maintains active product status with confirmed inventory availability (16,100 pcs in stock). This ensures long-term procurement viability and supply chain continuity.

Regulatory Compliance: The STPS745G-TR is ROHS3 compliant, whereas the MBRB735 is RoHS non-compliant. For applications subject to RoHS directives or customer compliance requirements, the STPS745G-TR provides regulatory alignment.

Electrical Performance: The STPS745G-TR exceeds the MBRB735 specifications in voltage rating (45 V vs. 35 V) and maximum junction temperature (175°C vs. 150°C). These higher ratings provide design margin and thermal headroom without compromising any electrical characteristics. Forward voltage, reverse leakage, recovery speed, and current rating are identical.

Mechanical Compatibility: Both parts utilize identical TO-263-3 D2PAK surface mount packaging, enabling direct PCB footprint compatibility without layout modifications.

Certification: Both parts carry identical REACH and ECCN classifications (REACH Unaffected, EAR99), with moisture sensitivity level MSL 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can the STPS745G-TR directly replace the MBRB735 on existing PCBs?

A: Yes. Both components use identical TO-263-3 D2PAK surface mount packaging with the same pinout and footprint. No PCB modifications are required.

Q: What is the primary reason for substitution?

A: The MBRB735 is obsolete. The STPS745G-TR is an active product with equivalent electrical performance and superior specifications, ensuring design continuity and procurement availability.

Q: Are the electrical characteristics identical between these parts?

A: The forward voltage (840 mV @ 15 A), average rectified current (7.5 A), recovery speed (≤ 500ns), and reverse leakage (100 µA) are identical. The STPS745G-TR provides higher voltage rating (45 V vs. 35 V) and extended temperature range (175°C vs. 150°C).

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

A: No. A higher voltage rating does not degrade performance in applications designed for 35 V operation. The substitute part operates safely within the original design specifications while providing additional voltage margin.

Q: What is the difference in RoHS compliance?

A: The MBRB735 is RoHS non-compliant. The STPS745G-TR is ROHS3 compliant, meeting current environmental and regulatory standards for electronic components.

Q: Are there any thermal performance differences?

A: The STPS745G-TR supports a maximum junction temperature of 175°C compared to 150°C for the MBRB735. This provides 25°C additional thermal headroom in high-temperature applications.

Q: Is the packaging identical?

A: Yes. Both parts are supplied in TO-263-3 D2PAK (2 Leads + Tab) surface mount packages. The STPS745G-TR is supplied in Tape & Reel (TR) packaging format.

Q: Can I use the STPS745G-TR in reverse polarity applications?

A: No. Schottky rectifier diodes are polarized components. The STPS745G-TR must be oriented with correct polarity matching the original MBRB735 installation.

Q: What is the reverse leakage current specification for the STPS745G-TR?

A: The STPS745G-TR specifies 100 µA maximum reverse leakage at 45 V, which is equivalent to the MBRB735 specification of 100 µA at 35 V.