MBR2045MFST3G Equivalent & Substitute Parts

Part Overview

The MBR2045MFST3G is an active Schottky rectifier diode manufactured by onsemi, rated for 45 V DC reverse voltage and 20 A average rectified current. This component is designed for surface mount applications in a 5-DFN (5x6) package configuration. The part is ROHS3 compliant and carries an unlimited moisture sensitivity level (MSL 1), making it suitable for standard industrial and commercial applications. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and application-specific performance matching.

Substiute Parts

MBR2045MFST3G

onsemiIn Stock: 963MBR2045MFST3G Datasheet

Current PartRFQ

V20KL45-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 6841V20KL45-M3/H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBR2045MFST3G are identified based on matching or exceeding the following critical electrical and mechanical parameters:

Voltage Rating: Substitute parts must maintain a DC reverse voltage rating of 45 V or higher to ensure equivalent or superior voltage withstand capability.

Package Configuration: Substitute parts must use compatible surface mount packages (8-PowerTDFN or equivalent FlatPAK form factors with 5x6 mm footprint dimensions) to ensure PCB layout compatibility.

Technology Type: All substitutes must employ Schottky diode technology to maintain fast recovery characteristics and forward voltage performance.

Compliance Standards: Substitute parts must maintain ROHS3 compliance and unlimited MSL rating to meet environmental and manufacturing process requirements.

Current Rating: While the MBR2045MFST3G is rated for 20 A average rectified current, substitute parts with lower current ratings (such as 5.4 A) may be selected for applications with reduced current requirements, provided all other parameters remain compatible.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (MBR2045MFST3G): Select the onsemi MBR2045MFST3G for applications requiring the full 20 A average rectified current rating, extended lower temperature operation (-55°C minimum junction temperature), and lower reverse leakage current (600 µA @ 45 V). This part maintains active product status and ROHS3 compliance.

Substitute Selection (V20KL45-M3/H): The Vishay V20KL45-M3/H serves as a substitute for applications with reduced current requirements (5.4 A or lower). This part is suitable for designs where automotive-grade qualification (AEC-Q101) is required or preferred. The part maintains ROHS3 compliance and identical package footprint compatibility. Note that this substitute exhibits higher reverse leakage current (1 mA @ 45 V) and a higher minimum junction temperature (-40°C).

Both parts maintain active product status, ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard manufacturing and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the V20KL45-M3/H directly replace the MBR2045MFST3G in all applications?

A: Direct replacement is possible only in applications where the circuit current requirement does not exceed 5.4 A. The V20KL45-M3/H is rated for 5.4 A average rectified current, compared to the MBR2045MFST3G's 20 A rating. Both parts share identical 45 V voltage ratings, fast recovery characteristics, and package footprints. Applications requiring the full 20 A capability must use the MBR2045MFST3G.

Q: Are the package footprints identical between these two parts?

A: Yes. Both the MBR2045MFST3G and V20KL45-M3/H use 8-PowerTDFN packages with 5x6 mm footprints and 5 leads. PCB layout and land pattern designs are compatible between these parts.

Q: What is the difference in reverse leakage current between these parts?

A: The MBR2045MFST3G exhibits 600 µA reverse leakage current at 45 V, while the V20KL45-M3/H exhibits 1 mA reverse leakage current at 45 V. Applications sensitive to leakage current performance should prioritize the onsemi part.

Q: Does the Vishay part carry any additional certifications?

A: Yes. The V20KL45-M3/H carries AEC-Q101 automotive qualification, making it suitable for automotive-grade applications. The onsemi MBR2045MFST3G does not list automotive qualification.

Q: What is the temperature operating range difference?

A: The MBR2045MFST3G operates from -55°C to 150°C junction temperature, while the V20KL45-M3/H operates from -40°C to 150°C. Applications requiring operation below -40°C must use the onsemi part.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the MBR2045MFST3G and V20KL45-M3/H are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), meeting standard environmental and manufacturing requirements.

Q: What forward voltage characteristics should be considered when selecting between these parts?

A: The MBR2045MFST3G is specified at 610 mV forward voltage at 30 A, while the V20KL45-M3/H is specified at 600 mV forward voltage at 20 A. Both parts demonstrate comparable forward voltage performance within their respective current ratings.