MBR540MFST3G Equivalent & Substitute Parts

Part Overview

The MBR540MFST3G is a Schottky rectifier diode manufactured by onsemi, rated for 40 V DC reverse voltage and 5 A average rectified current. The device is housed in a 5-DFN (5x6) surface mount package with 5 leads and features fast recovery characteristics suitable for high-frequency switching applications.

The MBR540MFST3G carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	5 A
Voltage - Forward (Vf) (Max) @ If	580 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	2 mA @ 40 V
Mounting Type	Surface Mount
Package / Case	8-PowerTDFN, 5 Leads
Supplier Device Package	5-DFN (5x6) (8-SOFL)
Operating Temperature - Junction	-40°C ~ 175°C
Technology	Schottky

Substitute Part Grouping Explanation

Substitute parts for the MBR540MFST3G are identified based on electrical and mechanical parameter equivalence. The following criteria determine substitution validity:

Electrical Parameters (Must Match):

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 5 A
Voltage - Forward (Vf) (Max) @ If: 580 mV @ 5 A
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: 2 mA @ 40 V
Technology: Schottky

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package / Case: 8-PowerTDFN, 5 Leads
Supplier Device Package: 5-DFN (5x6) (8-SOFL)
Operating Temperature - Junction: -40°C ~ 175°C

Compliance Parameters (Must Match):

RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Parameter	MBR540MFST3G	NRVB540MFST1G
Manufacturer	onsemi	onsemi
Category	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V
Current - Average Rectified (Io)	5 A	5 A
Voltage - Forward (Vf) (Max) @ If	580 mV @ 5 A	580 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	2 mA @ 40 V	2 mA @ 40 V
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-PowerTDFN, 5 Leads	8-PowerTDFN, 5 Leads
Supplier Device Package	5-DFN (5x6) (8-SOFL)	5-DFN (5x6) (8-SOFL)
Operating Temperature - Junction	-40°C ~ 175°C	-40°C ~ 175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active
Packaging	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

The NRVB540MFST1G is a direct parametric equivalent to the MBR540MFST3G. Both devices are manufactured by onsemi and share identical electrical specifications, mechanical packaging, and compliance certifications.

The primary distinction between these parts is product status and packaging format. The MBR540MFST3G is classified as obsolete, while the NRVB540MFST1G maintains active product status. The NRVB540MFST1G is supplied in Tape & Reel (TR) packaging, whereas the MBR540MFST3G is supplied in bulk packaging.

For new designs and ongoing production support, the NRVB540MFST1G is the appropriate selection. Both parts satisfy ROHS3 compliance requirements and carry identical moisture sensitivity ratings. The electrical performance, thermal operating range, and mechanical footprint are fully interchangeable.

Frequently Asked Questions (FAQ)

Q: Can the NRVB540MFST1G be used as a direct replacement for the MBR540MFST3G?

A: Yes. The NRVB540MFST1G is a parametric equivalent with identical electrical ratings (40 V, 5 A), forward voltage characteristics (580 mV @ 5 A), reverse leakage current (2 mA @ 40 V), and package configuration (5-DFN 5x6). Both devices are Schottky rectifiers with fast recovery characteristics and operate across the same temperature range (-40°C to 175°C).

Q: What is the difference between MBR540MFST3G and NRVB540MFST1G?

A: The electrical and mechanical specifications are identical. The MBR540MFST3G is obsolete and supplied in bulk packaging. The NRVB540MFST1G is an active product supplied in Tape & Reel (TR) packaging format, making it suitable for automated assembly processes.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 5-DFN (5x6) surface mount package with 8-PowerTDFN configuration and 5 leads. The mechanical footprint and pin layout are identical, enabling direct PCB substitution without layout modifications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the MBR540MFST3G and NRVB540MFST1G are ROHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level 1 (unlimited). Compliance certifications are equivalent.

Q: Which part should be selected for new production?

A: The NRVB540MFST1G should be selected for new designs and ongoing production. It maintains active product status and is available in standard Tape & Reel packaging suitable for high-volume manufacturing.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message