MBRF750-E3/45 Equivalent & Substitute Parts

Part Overview

The MBRF750-E3/45 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 7.5 A average rectified current in a through-hole TO-220-2 package with isolated tab. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within specified parameters while accommodating modern packaging and availability constraints.

Substiute Parts

MBRF750-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 741MBRF750-E3/45 Datasheet

Current PartRFQ

V8P6-M3/87A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1169V8P6-M3/87A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRF750-E3/45 is determined by the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) rating must equal or exceed 50 V
• Current - Average Rectified (Io) rating must equal or exceed 7.5 A
• Technology classification must be Schottky
• Speed characteristic must be Fast Recovery (≤ 500ns, > 200mA)
• RoHS3 compliance required
• Operating temperature range must encompass the application requirements

Secondary Considerations:

• Forward voltage (Vf) performance at rated current
• Reverse leakage current characteristics
• Package form factor and mounting compatibility with circuit board design

The identified substitute part V8P6-M3/87A meets the core electrical requirements while introducing a different package form (surface mount TO-277A versus through-hole TO-220-2), which requires circuit board redesign consideration.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The V8P6-M3/87A presents a viable electrical substitute for the MBRF750-E3/45 in applications where the following conditions are satisfied:

1. Current Rating Compatibility: The V8P6-M3/87A is rated for 4.2 A average rectified current, which is lower than the MBRF750-E3/45 specification of 7.5 A. This part is suitable only for applications requiring ≤ 4.2 A continuous current.

2. Voltage Rating: The V8P6-M3/87A provides 60 V reverse voltage rating, exceeding the 50 V requirement of the MBRF750-E3/45, ensuring adequate voltage margin.

3. Forward Voltage Performance: The V8P6-M3/87A exhibits lower forward voltage (610 mV @ 8 A) compared to the MBRF750-E3/45 (750 mV @ 7.5 A), resulting in reduced power dissipation.

4. Temperature Range: The V8P6-M3/87A operating range (-40°C ~ 150°C) is narrower than the MBRF750-E3/45 (-65°C ~ 150°C). Applications requiring operation below -40°C require alternative solutions.

5. Compliance Status: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

6. Product Availability: The V8P6-M3/87A is classified as Active, ensuring continued availability and supply chain stability compared to the obsolete MBRF750-E3/45.

Package Transition Consideration:

Substitution requires circuit board redesign due to the transition from through-hole TO-220-2 mounting to surface-mount TO-277A packaging. This change impacts PCB layout, thermal management strategy, and assembly process compatibility.

Frequently Asked Questions (FAQ)

Q: Can the V8P6-M3/87A directly replace the MBRF750-E3/45 in existing designs?

A: Direct replacement is not possible without circuit board modification. The V8P6-M3/87A uses surface-mount TO-277A packaging, while the MBRF750-E3/45 uses through-hole TO-220-2 packaging. Additionally, the current rating difference (4.2 A versus 7.5 A) requires verification that application current requirements do not exceed 4.2 A.

Q: What is the primary limitation of using V8P6-M3/87A as a substitute?

A: The average rectified current rating of 4.2 A is the primary limitation. The MBRF750-E3/45 is rated for 7.5 A. The V8P6-M3/87A is suitable only for applications with continuous current requirements of 4.2 A or less.

Q: Are there temperature range considerations for substitution?

A: Yes. The V8P6-M3/87A operating temperature range is -40°C ~ 150°C, compared to the MBRF750-E3/45 range of -65°C ~ 150°C. Applications requiring operation below -40°C cannot use the V8P6-M3/87A.

Q: How do the forward voltage characteristics compare?

A: The V8P6-M3/87A exhibits lower forward voltage (610 mV @ 8 A) than the MBRF750-E3/45 (750 mV @ 7.5 A). This results in lower power dissipation and improved thermal performance in the substitute part.

Q: What compliance certifications apply to both parts?

A: Both the MBRF750-E3/45 and V8P6-M3/87A are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Why is the MBRF750-E3/45 classified as obsolete?

A: The MBRF750-E3/45 is obsolete, indicating discontinued manufacturing and limited availability. The V8P6-M3/87A, classified as Active, represents the current product line offering from Vishay General Semiconductor - Diodes Division.

Q: What thermal management differences exist between the packages?

A: The through-hole TO-220-2 package of the MBRF750-E3/45 provides direct thermal coupling to the PCB through leads and isolated tab. The surface-mount TO-277A package of the V8P6-M3/87A uses a different thermal path. Thermal analysis specific to the application circuit is required.

Q: Can the V8P6-M3/87A handle the same reverse voltage as the MBRF750-E3/45?

A: Yes. The V8P6-M3/87A is rated for 60 V reverse voltage, exceeding the 50 V requirement of the MBRF750-E3/45, providing adequate voltage margin.