MB4M-E3/45 Equivalent & Substitute Parts

Part Overview

The MB4M-E3/45 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V peak reverse voltage and 500 mA average rectified current. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and procurement planning. The through-hole MBM package configuration requires alternative solutions for new production or maintenance applications.

Substiute Parts

MB4M-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 925MB4M-E3/45 Datasheet

Current PartRFQ

MB4S-E3/80

Vishay General Semiconductor - Diodes DivisionIn Stock: 55651MB4S-E3/80 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MB4M-E3/45 is determined by electrical parameter equivalence across the MB4 base product family. The following parameters must remain constant for functional interchangeability:

• Voltage - Peak Reverse (Max): 400 V
• Current - Average Rectified (Io): 500 mA
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 400 mA
• Current - Reverse Leakage @ Vr: 5 µA @ 400 V
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Diode Type: Single Phase
• Technology: Standard

The MB4S-E3/80 maintains electrical equivalence while transitioning from through-hole to surface-mount packaging. This substitution is valid where PCB layout and assembly process compatibility permit surface-mount implementation.

Parameter Comparison

Engineering Selection Recommendations

The MB4S-E3/80 is the manufacturer-recommended substitute for the obsolete MB4M-E3/45. Both components maintain identical electrical specifications and comply with ROHS3 and REACH requirements. The primary distinction is packaging format: the MB4M-E3/45 uses through-hole mounting (4-DIP), while the MB4S-E3/80 uses surface-mount technology (TO-269AA, 4-BESOP).

Selection between these parts depends on PCB assembly methodology. Through-hole designs may require the MB4M-E3/45 or equivalent through-hole alternatives from the MB4 series. Surface-mount production processes should transition to the MB4S-E3/80, which offers active product status and established supply chain availability (55,607 units in stock versus 909 units for the obsolete variant).

Frequently Asked Questions (FAQ)

Q: Can the MB4S-E3/80 directly replace the MB4M-E3/45 in existing designs?

A: Electrical substitution is valid. The MB4S-E3/80 maintains all critical electrical parameters. However, PCB layout and assembly process compatibility must be confirmed, as the MB4S-E3/80 requires surface-mount assembly while the MB4M-E3/45 uses through-hole mounting.

Q: What are the key parameters that define substitution eligibility?

A: Voltage - Peak Reverse (400 V), Current - Average Rectified (500 mA), Voltage - Forward (1 V @ 400 mA), Current - Reverse Leakage (5 µA @ 400 V), and Operating Temperature Range (-55°C ~ 150°C) must remain constant across substitute parts.

Q: Why is the MB4M-E3/45 classified as obsolete?

A: The MB4M-E3/45 is no longer in active production. The MB4S-E3/80 represents the current active product offering from Vishay for this electrical specification class.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 Compliant and REACH Unaffected. No compliance differentiation exists between the MB4M-E3/45 and MB4S-E3/80.

Q: What packaging considerations apply to substitution?

A: The MB4M-E3/45 uses 4-DIP (0.200", 5.08mm) through-hole packaging. The MB4S-E3/80 uses TO-269AA, 4-BESOP surface-mount packaging. PCB footprint and assembly equipment compatibility must be evaluated before implementation.