MB352W Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB352W 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 classified as Obsolete, making identification of suitable alternatives necessary for ongoing production and maintenance applications. The MB352W features a through-hole MB-W package configuration and operates across a temperature range of -55°C to 150°C.

Substiute Parts

MB352W

Diodes IncorporatedIn Stock: 1060MB352W Datasheet

Current PartRFQ

MB251W-BP

Micro Commercial CoIn Stock: 1496MB251W-BP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MB352W is determined by the following critical electrical and mechanical parameters:

• Diode Type: Single Phase bridge rectifier configuration
• Technology: Standard rectifier technology
• Voltage - Peak Reverse (Max): Must support minimum 200 V
• Current - Average Rectified (Io): Must support minimum 35 A
• Mounting Type: Through Hole configuration
• Package / Case: 4-Square form factor compatibility
• Operating Temperature Range: Must encompass or exceed -55°C to 150°C

The MB251W-BP is identified as a manufacturer-recommended substitute. However, this part operates at reduced electrical ratings: 100 V peak reverse voltage and 25 A average rectified current. This substitute is suitable only for applications where the circuit design permits operation at these lower voltage and current specifications.

Parameter Comparison

Engineering Selection Recommendations

The MB352W is classified as Obsolete. The MB251W-BP is the manufacturer-recommended substitute but carries a "Not For New Designs" status, indicating limited long-term availability.

Both parts are ROHS3 Compliant and share identical forward voltage characteristics (1.2 V maximum). Both maintain the same reverse leakage current specification (10 µA) within their respective voltage ratings.

The MB251W-BP operates at reduced electrical specifications: 100 V peak reverse voltage versus 200 V, and 25 A average rectified current versus 35 A. The MB251W-BP also has a lower maximum operating temperature of 125°C compared to 150°C for the MB352W.

Selection of the MB251W-BP is appropriate only when circuit design requirements permit operation within these reduced electrical and thermal parameters. Applications requiring the full 200 V and 35 A specifications of the MB352W cannot use the MB251W-BP as a direct substitute.

Frequently Asked Questions (FAQ)

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

A: No. The MB251W-BP has reduced electrical ratings (100 V / 25 A versus 200 V / 35 A). Substitution is valid only when the circuit design operates within these lower specifications.

Q: What are the key differences between these parts?

A: Peak reverse voltage is reduced from 200 V to 100 V. Average rectified current is reduced from 35 A to 25 A. Maximum operating temperature is reduced from 150°C to 125°C. Package form factors differ (MB-W versus MB-35W).

Q: Are both parts RoHS compliant?

A: Yes. Both the MB352W and MB251W-BP are ROHS3 Compliant.

Q: What is the significance of the "Obsolete" and "Not For New Designs" status?

A: The MB352W is Obsolete, indicating it is no longer manufactured. The MB251W-BP is marked "Not For New Designs," indicating limited future availability and unsuitability for new product development.

Q: Are the packages physically compatible?

A: Both use 4-Square through-hole configurations. However, the specific package designations differ (MB-W versus MB-35W). Physical compatibility should be verified against PCB footprint specifications.

Q: What is the forward voltage drop for each part?

A: Both parts specify 1.2 V maximum forward voltage. The MB352W is rated at 17.5 A, while the MB251W-BP is rated at 12.5 A for this specification.