MB3505 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB3505 is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 50 V peak reverse voltage and 35 A average rectified current. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The MB3505 features QC terminal mounting and operates across a temperature range of -55°C to 150°C.

Substiute Parts

MB3505

Diodes IncorporatedIn Stock: 979MB3505 Datasheet

Current PartRFQ

BR50005-G

Comchip TechnologyIn Stock: 984BR50005-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MB3505 is determined by equivalence across the following critical parameters:

• Voltage - Peak Reverse (Max): Must equal or exceed 50 V
• Diode Type: Must be Single Phase bridge rectifier
• Mounting Type: Must be QC Terminal
• Technology: Must be Standard
• Current - Average Rectified (Io): Must meet or exceed 35 A
• RoHS Status: Must maintain ROHS3 Compliance
• Package / Case: Must be compatible with 4-Square terminal configuration

The BR50005-G from Comchip Technology satisfies all substitution criteria. While the BR50005-G provides higher current capacity (50 A versus 35 A) and lower forward voltage (1.1 V @ 25 A versus 1.2 V @ 17.5 A), these represent performance improvements within the same functional category and do not preclude substitution.

Parameter Comparison

Engineering Selection Recommendations

The BR50005-G is the manufacturer-recommended substitute for the MB3505. Both components maintain ROHS3 compliance and identical reverse leakage characteristics. The BR50005-G carries active product status, ensuring continued availability and manufacturing support. The higher current rating (50 A) of the BR50005-G provides design margin relative to the original 35 A specification. The operating temperature maximum of the BR50005-G is 125°C, which is 25°C lower than the MB3505; applications requiring operation above 125°C junction temperature require thermal analysis to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can the BR50005-G directly replace the MB3505 in existing designs?

A: The BR50005-G meets all critical substitution parameters: identical peak reverse voltage (50 V), single-phase bridge rectifier topology, QC terminal mounting, and standard technology. The higher current rating and lower forward voltage represent performance improvements. Thermal design must account for the 25°C reduction in maximum operating temperature.

Q: What is the significance of the different package designations (MB versus BR)?

A: Both packages are 4-Square terminal configurations compatible with QC terminal mounting. The different designations reflect manufacturer-specific package nomenclature but maintain mechanical and electrical compatibility.

Q: Why is the MB3505 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The BR50005-G, classified as active, represents the current-generation equivalent with enhanced specifications.

Q: Are there compliance differences between the MB3505 and BR50005-G?

A: Both components are ROHS3 compliant. The MB3505 is REACH Affected; the BR50005-G is REACH Unaffected. Both carry EAR99 ECCN classification and identical HTSUS codes (8541.10.0080).

Q: What thermal considerations apply to substitution?

A: The MB3505 operates to 150°C junction temperature; the BR50005-G operates to 125°C. Applications operating near or above 125°C require thermal analysis to confirm the BR50005-G remains within safe operating limits.