MBRB745 Equivalent & Substitute Parts

Part Overview

The MBRB745 is an active Schottky rectifier diode manufactured by SMC Diode Solutions, rated for 45V DC reverse voltage and 7.5A average rectified current in a surface mount D2PAK package. This component is designed for fast recovery applications requiring switching speeds of 500ns or less at currents exceeding 200mA. Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility is required within specified electrical and mechanical parameters.

Substiute Parts

MBRB745

SMC Diode SolutionsIn Stock: 3850MBRB745 Datasheet

Current PartRFQ

VS-6TQ045S-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 5575VS-6TQ045S-M3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBRB745 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is based on the following parameters:

Voltage Rating Compatibility: Substitute parts must maintain the same maximum DC reverse voltage rating of 45V to ensure equivalent circuit protection and reliability.

Package Compatibility: Substitute parts must use the same physical package designation (TO-263-3, D2PAK with 2 Leads + Tab, TO-263AB) to ensure direct mechanical and electrical pin compatibility on printed circuit boards.

Technology Type: Substitute parts must employ Schottky diode technology to maintain identical switching characteristics and forward voltage behavior.

Speed Classification: Substitute parts must meet the fast recovery specification of 500ns or less at currents exceeding 200mA to ensure equivalent performance in high-frequency switching applications.

Compliance Standards: Substitute parts must maintain ROHS3 compliance and EAR99 export classification to ensure regulatory equivalence.

Current rating differences are permitted within the substitution framework when all other parameters align, as long as the substitute part's current rating meets or exceeds the application requirement. The VS-6TQ045S-M3 qualifies as a substitute despite a 6A current rating versus the 7.5A rating of the MBRB745, provided the application does not require the full 7.5A capacity.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The MBRB745 remains the preferred selection when full 7.5A current capacity is required and when the operating temperature range does not exceed 150°C. This part is manufactured by SMC Diode Solutions and maintains active product status with ROHS3 compliance and REACH affected designation.

Substitute Part Selection: The VS-6TQ045S-M3 manufactured by Vishay General Semiconductor - Diodes Division is suitable as a substitute when the application current requirement does not exceed 6A and when extended operating temperature capability to 175°C provides design advantage. This part maintains active product status, ROHS3 compliance, and REACH unaffected designation.

Compliance Considerations: Both parts maintain identical ECCN classification (EAR99) and HTSUS code (8541.10.0080), ensuring equivalent export and tariff treatment. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions.

Packaging Consideration: The MBRB745 is supplied in Tape & Reel format, while the VS-6TQ045S-M3 is supplied in Tube format. This difference affects inventory management and automated assembly compatibility but does not affect electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the VS-6TQ045S-M3 be used as a direct replacement for the MBRB745 in all applications?

A: The VS-6TQ045S-M3 is a direct mechanical and electrical substitute only when the application current requirement does not exceed 6A. The MBRB745 is rated for 7.5A average rectified current, while the VS-6TQ045S-M3 is rated for 6A. If the circuit design requires the full 7.5A capacity, the MBRB745 must be used.

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

A: The primary differences are: (1) Current rating: MBRB745 at 7.5A versus VS-6TQ045S-M3 at 6A; (2) Reverse leakage current: MBRB745 at 100µA versus VS-6TQ045S-M3 at 800µA; (3) Maximum junction temperature: MBRB745 at 150°C versus VS-6TQ045S-M3 at 175°C; (4) Packaging format: MBRB745 in Tape & Reel versus VS-6TQ045S-M3 in Tube.

Q: Are both parts RoHS compliant?

A: Yes, both the MBRB745 and VS-6TQ045S-M3 are ROHS3 compliant and carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: Do these parts have identical package dimensions?

A: Yes, both parts use the TO-263-3 package designation, also known as D2PAK with 2 Leads + Tab (TO-263AB). The physical dimensions and pin configurations are identical, allowing direct PCB footprint compatibility.

Q: What is the significance of the reverse leakage current difference?

A: The VS-6TQ045S-M3 exhibits higher reverse leakage current (800µA at 45V) compared to the MBRB745 (100µA at 45V). In applications sensitive to leakage current, such as precision analog circuits or low-power standby modes, this difference may be significant and should be evaluated against circuit requirements.

Q: Can I use the VS-6TQ045S-M3 in a high-temperature application?

A: The VS-6TQ045S-M3 supports extended junction temperature operation to 175°C, compared to the MBRB745 maximum of 150°C. This makes the VS-6TQ045S-M3 suitable for applications requiring higher temperature capability, provided the current requirement does not exceed 6A.

Q: What is the difference between Tape & Reel and Tube packaging?

A: Tape & Reel packaging is optimized for automated pick-and-place assembly equipment, while Tube packaging is suitable for manual handling and lower-volume assembly processes. Both formats contain the same electrical components; the difference is in supply and handling methodology.