MB1M-G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB1M-G is a single-phase bridge rectifier diode manufactured by Comchip Technology, rated for 100 V peak reverse voltage and 800 mA average rectified current. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The through-hole MBM package configuration and standard rectification technology establish the baseline for equivalent part selection.

Substiute Parts

MB1M-G

Comchip TechnologyIn Stock: 791MB1M-G Datasheet

Current PartRFQ

EDF1BM-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1908EDF1BM-E3/45 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MB1M-G are selected based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Peak Reverse (Max): Must equal or exceed 100 V
• Current - Average Rectified (Io): Must equal or exceed 800 mA
• Diode Type: Single Phase bridge rectifier
• Technology: Standard rectification
• Operating Temperature Range: Must encompass -55°C ~ 150°C

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package Configuration: 4-pin DIP or equivalent through-hole package
• Moisture Sensitivity Level: MSL 1 or better

The EDF1BM-E3/45 meets all substitution criteria with electrical ratings that equal or exceed the MB1M-G specifications and maintains through-hole mounting compatibility.

Parameter Comparison

Engineering Selection Recommendations

The EDF1BM-E3/45 is a qualified substitute for the obsolete MB1M-G based on electrical parameter equivalence and through-hole mounting compatibility. The substitute part offers the following advantages:

• Active product status ensures ongoing availability and supply chain continuity
• Current rating of 1 A exceeds the 800 mA requirement, providing operational margin
• Forward voltage of 1.05 V @ 1 A is lower than the MB1M-G specification, resulting in reduced power dissipation
• ROHS3 compliance and REACH unaffected status meet modern regulatory requirements
• Identical reverse leakage and operating temperature specifications

Package footprint differences between the 4-DIP (0.200", 5.08mm) and 4-EDIP (0.300", 7.62mm) require PCB layout verification prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the EDF1BM-E3/45 directly replace the MB1M-G without circuit modifications?

A: Electrical substitution is valid based on voltage, current, and temperature specifications. However, the different package footprint (4-DIP vs. 4-EDIP) requires PCB layout assessment. Pin spacing differs (0.200" vs. 0.300"), necessitating through-hole position verification.

Q: What is the significance of the higher current rating on the EDF1BM-E3/45?

A: The 1 A rating on the substitute part exceeds the 800 mA requirement of the MB1M-G. This provides operational margin and does not create compatibility issues in circuits designed for 800 mA operation.

Q: Are there compliance differences between the main part and substitute?

A: The MB1M-G product status is listed as obsolete with unspecified RoHS compliance. The EDF1BM-E3/45 is active production with ROHS3 compliance and REACH unaffected status, meeting current regulatory standards.

Q: How do the forward voltage specifications compare?

A: The MB1M-G specifies 1.1 V @ 800 mA, while the EDF1BM-E3/45 specifies 1.05 V @ 1 A. The lower forward voltage on the substitute reduces power dissipation in rectification applications.

Q: What packaging considerations apply to this substitution?

A: Both parts use through-hole mounting, maintaining the same installation method. The package case dimensions differ, requiring verification that the 4-EDIP (0.300", 7.62mm) spacing accommodates existing PCB hole patterns designed for 4-DIP (0.200", 5.08mm) configuration.