MBR0540T3 Equivalent & Substitute Parts

Part Overview

The MBR0540T3 is a Schottky rectifier diode manufactured by onsemi, rated for 40 V DC reverse voltage and 500 mA average rectified current in a surface mount SOD-123 package. This component is classified as obsolete, indicating discontinuation from the manufacturer. Locating equivalent or substitute parts is necessary for ongoing production support, design updates, and inventory replenishment where the original part is no longer available through standard distribution channels.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	500 mA
Voltage - Forward (Vf) (Max) @ If	510 mV @ 500 mA
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	20 µA @ 40 V
Technology	Schottky
Mounting Type	Surface Mount
Package / Case	SOD-123
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MBR0540T3 is determined by the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Technology: Schottky
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type: Surface Mount

Current Rating Compatibility:

Minimum Current - Average Rectified (Io): 500 mA (equal or greater)

Package Compatibility:

Primary: SOD-123 or equivalent surface mount packages (SOD-123F, SOD-323, DO-219AB)

Forward Voltage Tolerance:

Voltage - Forward (Vf) (Max) @ If: Acceptable range 470 mV to 520 mV @ rated current

Substitute parts must satisfy all mandatory matching parameters and meet or exceed the current rating. Forward voltage and reverse leakage variations within the specified ranges are acceptable for circuit operation. Package differences are permissible provided the substitute maintains surface mount form factor and PCB footprint compatibility is verified during design integration.

Parameter Comparison

Parameter	MBR0540T3	MBR0540T3G	BAT165E6327HTSA1	PMEG4005EH,115	SS1F4-M3/H
Manufacturer	onsemi	onsemi	Infineon Technologies	Nexperia USA Inc.	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	500 mA	500 mA	750 mA	500 mA	1 A
Voltage - Forward (Vf) (Max) @ If	510 mV @ 500 mA	510 mV @ 500 mA	740 mV @ 750 mA	470 mV @ 500 mA	520 mV @ 1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	20 µA @ 40 V	20 µA @ 40 V	50 µA @ 40 V	100 µA @ 40 V	150 µA @ 40 V
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123	SC-76, SOD-323	SOD-123F	DO-219AB
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MBR0540T3G (onsemi)

The MBR0540T3G is the direct equivalent to the MBR0540T3. This part maintains identical electrical specifications including 40 V reverse voltage, 500 mA current rating, 510 mV forward voltage, and fast recovery characteristics. The MBR0540T3G is in active product status with ROHS3 compliance, addressing the obsolescence of the original part. Package compatibility is exact (SOD-123). This substitute is the primary selection for direct replacement applications.

PMEG4005EH,115 (Nexperia USA Inc.)

The PMEG4005EH,115 meets all mandatory electrical parameters with 40 V reverse voltage and 500 mA current rating. Forward voltage is 470 mV @ 500 mA, which is lower than the original part, resulting in reduced power dissipation. Fast recovery characteristics are maintained. The package is SOD-123F, a variant of SOD-123 with enhanced thermal performance. This part is active and ROHS3 compliant. PCB footprint compatibility must be verified before selection.

BAT165E6327HTSA1 (Infineon Technologies)

The BAT165E6327HTSA1 exceeds the original specifications with 750 mA current rating while maintaining 40 V reverse voltage and fast recovery characteristics. Forward voltage is 740 mV @ 750 mA. The package is SOD-323 (SC-76), which differs from SOD-123 and requires PCB layout verification. This part is active and ROHS3 compliant. Selection is appropriate for applications requiring higher current capacity with the same voltage rating.

SS1F4-M3/H (Vishay General Semiconductor - Diodes Division)

The SS1F4-M3/H provides the highest current rating at 1 A while maintaining 40 V reverse voltage and fast recovery characteristics. Forward voltage is 520 mV @ 1 A. The package is DO-219AB (SMF), which differs significantly from SOD-123 and requires PCB redesign. This part is active and ROHS3 compliant. Selection is appropriate for applications requiring substantially higher current capacity.

Frequently Asked Questions (FAQ)

Q: Can the MBR0540T3G be used as a direct replacement for the MBR0540T3?

A: Yes. The MBR0540T3G is electrically and mechanically identical to the MBR0540T3, with the same SOD-123 package, 40 V rating, 500 mA current, and fast recovery characteristics. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What is the difference between SOD-123 and SOD-123F packages?

A: SOD-123F is a variant of SOD-123 with enhanced thermal performance characteristics. Both packages are surface mount and have similar PCB footprints. The PMEG4005EH,115 in SOD-123F package can typically be used as a direct replacement for SOD-123 applications, but PCB layout verification is necessary to confirm footprint compatibility with your specific design.

Q: Can I use the BAT165E6327HTSA1 (750 mA) instead of the MBR0540T3 (500 mA)?

A: The BAT165E6327HTSA1 meets all mandatory electrical parameters and exceeds the current rating. However, the package is SOD-323 instead of SOD-123, requiring PCB footprint verification and potential layout modifications. Use this substitute only when higher current capacity is beneficial and package compatibility is confirmed.

Q: Can I use the SS1F4-M3/H (1 A) instead of the MBR0540T3 (500 mA)?

A: The SS1F4-M3/H meets all mandatory electrical parameters and provides double the current rating. The package is DO-219AB (SMF), which is significantly different from SOD-123 and requires PCB redesign. Use this substitute only when higher current capacity is required and PCB layout can be modified to accommodate the different package.

Q: What does "Fast Recovery ≤ 500 ns, > 200 mA (Io)" mean?

A: This specification indicates the diode has a reverse recovery time of 500 nanoseconds or less when switching at currents greater than 200 mA. All listed substitute parts meet this specification, ensuring compatible switching performance in fast-switching applications such as power supplies and inverters.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed (MBR0540T3G, BAT165E6327HTSA1, PMEG4005EH,115, and SS1F4-M3/H) are ROHS3 compliant. The original MBR0540T3 is RoHS non-compliant. If RoHS compliance is a requirement for your application, any of the substitute parts satisfy this requirement.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current increases across the substitute parts (20 µA for MBR0540T3G, 50 µA for BAT165E6327HTSA1, 100 µA for PMEG4005EH,115, and 150 µA for SS1F4-M3/H). Higher leakage current results in increased power dissipation in reverse bias conditions. For most applications, these differences are negligible, but high-impedance or low-power circuits may require evaluation.

Q: Can forward voltage differences affect circuit performance?

A: Forward voltage variations (470 mV to 520 mV) are within acceptable ranges for most rectifier applications. Lower forward voltage (PMEG4005EH,115 at 470 mV) reduces power dissipation and heat generation. Higher forward voltage (BAT165E6327HTSA1 at 740 mV) increases power dissipation. Circuit performance impact depends on application-specific requirements; evaluate if thermal or efficiency considerations are critical.

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