MB352W-F Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB352W-F is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 200 V peak reverse voltage and 35 A average rectified current. This component is designed for through-hole mounting applications requiring standard bridge rectification in the MB-W package configuration. The product is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing system support and new procurement requirements.

Substiute Parts

MB352W-F

Diodes IncorporatedIn Stock: 788MB352W-F Datasheet

Current PartRFQ

MB251W-BP

Micro Commercial CoIn Stock: 1496MB251W-BP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MB352W-F requires strict adherence to the following electrical and mechanical criteria:

Critical Parameters for Substitution:

• Diode Type: Single Phase (fixed requirement)
• Technology: Standard (fixed requirement)
• Mounting Type: Through Hole (fixed requirement)
• Package Configuration: 4-Square form factor (mechanical compatibility)

Allowable Parameter Variations:

• Voltage - Peak Reverse (Max): Must equal or exceed 200 V
• Current - Average Rectified (Io): Must equal or exceed 35 A
• Operating Temperature Range: Must encompass or exceed -55°C ~ 150°C
• Forward Voltage and Reverse Leakage: Must not exceed specified maximums

The MB251W-BP is identified as a manufacturer-recommended substitute. However, this part operates at reduced electrical ratings (100 V peak reverse, 25 A average rectified current), placing it outside the strict substitution criteria for direct replacement in applications requiring the full 200 V / 35 A specification.

Parameter Comparison

Engineering Selection Recommendations

The MB251W-BP presents a functional alternative only for applications where the reduced electrical specifications are acceptable. The 100 V peak reverse voltage and 25 A average rectified current ratings represent significant derating compared to the MB352W-F specification.

Compliance Considerations: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for applications subject to these requirements. Both components carry MSL 1 (Unlimited) moisture sensitivity classification, indicating equivalent handling and storage requirements.

Availability Status: The MB352W-F is discontinued at DiGi Electronics with 734 units reported in stock. The MB251W-BP carries a "Not For New Designs" status with 1392 units available. Neither part is recommended for new design implementations; both represent legacy component selections.

Application Scope: Selection of MB251W-BP is limited to circuits where peak reverse voltage does not exceed 100 V and average rectified current does not exceed 25 A. Applications requiring the full 200 V / 35 A capability of the MB352W-F cannot use this substitute without circuit redesign or derating analysis.

Frequently Asked Questions (FAQ)

Q: Can MB251W-BP directly replace MB352W-F in all applications?

A: No. The MB251W-BP operates at reduced electrical ratings (100 V / 25 A versus 200 V / 35 A). Direct substitution is only valid for applications designed to operate within the lower specification envelope.

Q: What are the mechanical compatibility considerations?

A: Both parts use 4-Square through-hole package configurations (MB-W and MB-35W respectively). Physical footprint compatibility exists, but pin spacing and mounting hole alignment must be verified against PCB design specifications.

Q: Are there temperature range differences between these parts?

A: Yes. The MB352W-F operates to 150°C junction temperature, while MB251W-BP is rated to 125°C. Applications requiring operation above 125°C cannot use the substitute.

Q: Do both parts meet the same regulatory compliance standards?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1). Regulatory compliance is equivalent between the two components.

Q: Why is MB251W-BP listed as "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active support for new applications. Both the main part and substitute represent legacy components with limited long-term availability.

Q: What forward voltage characteristics should be considered?

A: Both parts specify 1.2 V maximum forward voltage, but at different rated currents (17.5 A for MB352W-F, 12.5 A for MB251W-BP). Forward voltage performance is equivalent within their respective current ratings.