MBRA140T3 Equivalent & Substitute Parts

Part Overview

The MBRA140T3 is a Schottky rectifier diode rated for 40 V DC reverse voltage and 1 A average rectified current in a surface mount SMA package (DO-214AC). This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure procurement availability for applications requiring 40 V, 1 A Schottky diode functionality in surface mount form factor.

Substiute Parts

MBRA140T3

onsemiIn Stock: 18086MBRA140T3 Datasheet

Current PartRFQ

MBRA140T3G

onsemiIn Stock: 48232MBRA140T3G Datasheet

DirectRFQ

B140-13-F

Diodes IncorporatedIn Stock: 636501B140-13-F Datasheet

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BAT165E6327HTSA1

Infineon TechnologiesIn Stock: 71911BAT165E6327HTSA1 Datasheet

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CDBA140-G

Comchip TechnologyIn Stock: 1681CDBA140-G Datasheet

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PMEG4010EP,115

Nexperia USA Inc.In Stock: 18872PMEG4010EP,115 Datasheet

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SSA24-M3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 955SSA24-M3/5AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRA140T3 is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io): 1 A (or higher)
• Technology: Schottky
• Mounting Type: Surface Mount
• Package / Case: DO-214AC, SMA (or compatible surface mount package)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical electrical ratings (40 V, 1 A) and the same DO-214AC/SMA package form factor. These provide pin-for-pin and footprint compatibility.

Functional Equivalents: Parts with identical or superior voltage and current ratings but in alternative surface mount packages (SOD-323, SOD-128). These require PCB layout modification but maintain electrical compatibility within the specified parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Pin-for-Pin Compatible):

MBRA140T3G is the primary direct replacement. This part maintains identical electrical specifications (40 V, 1 A, 550 mV forward voltage) and package form factor (DO-214AC, SMA). The part is in active product status with ROHS3 compliance, addressing the obsolescence and RoHS non-compliance status of the original MBRA140T3.

B140-13-F and CDBA140-G are functionally equivalent direct replacements. Both maintain 40 V, 1 A ratings in DO-214AC/SMA packages with active product status and ROHS3 compliance. Forward voltage is specified at 500 mV @ 1 A, which is lower than the original part's 550 mV maximum, indicating improved performance characteristics.

Alternative Package Solutions:

PMEG4010EP,115 provides equivalent electrical performance (40 V, 1 A) with improved forward voltage (490 mV @ 1 A) but requires PCB layout modification due to SOD-128 package form factor. This part is in active status with ROHS3 compliance.

SSA24-M3/5AT offers superior current rating (2 A) at the same 40 V voltage specification, maintaining DO-214AC/SMA package compatibility. This part is suitable for applications requiring higher current margin or future design flexibility.

Limited Current Application:

BAT165E6327HTSA1 is rated for 750 mA average rectified current, which is below the original 1 A specification. This part is suitable only for applications where the actual operating current does not exceed 750 mA. The SOD-323 package requires PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can MBRA140T3G be used as a direct replacement for MBRA140T3?

A: Yes. MBRA140T3G is a direct replacement with identical electrical specifications (40 V, 1 A, 550 mV forward voltage) and the same DO-214AC/SMA package. No circuit or PCB modifications are required. MBRA140T3G is in active product status with ROHS3 compliance, addressing the obsolete status of the original part.

Q: What is the difference between B140-13-F and MBRA140T3?

A: Both parts are rated for 40 V and 1 A in DO-214AC/SMA packages. B140-13-F specifies a maximum forward voltage of 500 mV @ 1 A compared to 550 mV @ 1 A for MBRA140T3, indicating lower forward voltage drop. B140-13-F is in active product status with ROHS3 compliance.

Q: Can SSA24-M3/5AT replace MBRA140T3 in my application?

A: SSA24-M3/5AT maintains the same 40 V voltage rating and DO-214AC/SMA package form factor. However, it is rated for 2 A average rectified current instead of 1 A. This part can be used if the application circuit is compatible with a higher current-rated device. No PCB modifications are required.

Q: Why would I choose PMEG4010EP,115 over B140-13-F?

A: PMEG4010EP,115 offers lower forward voltage (490 mV @ 1 A) compared to B140-13-F (500 mV @ 1 A), resulting in reduced power dissipation. However, PMEG4010EP,115 uses a SOD-128 package instead of DO-214AC/SMA, requiring PCB layout modification. Selection depends on whether the application prioritizes thermal performance or design simplicity.

Q: Is BAT165E6327HTSA1 suitable for all applications using MBRA140T3?

A: BAT165E6327HTSA1 is rated for 750 mA average rectified current, which is below the original 1 A specification. This part is suitable only for applications where the actual operating current does not exceed 750 mA. The SOD-323 package also requires PCB redesign. Verify application current requirements before selection.

Q: What does RoHS compliance mean for my design?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. The original MBRA140T3 is RoHS non-compliant. All active substitute parts listed (MBRA140T3G, B140-13-F, CDBA140-G, PMEG4010EP,115, SSA24-M3/5AT, BAT165E6327HTSA1) are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Can I use a higher current-rated diode in place of MBRA140T3?

A: Yes. A diode rated for higher current (such as SSA24-M3/5AT at 2 A) can be used in applications designed for 1 A, provided all other electrical parameters (voltage, forward voltage, speed) are compatible and the package form factor is acceptable. Higher current rating provides design margin but does not improve performance in the original application.

Q: What is the significance of forward voltage differences between substitute parts?

A: Forward voltage (Vf) affects power dissipation and heat generation. Lower forward voltage results in reduced power loss. For example, PMEG4010EP,115 at 490 mV @ 1 A dissipates less power than MBRA140T3 at 550 mV @ 1 A. In high-current or thermally constrained applications, lower forward voltage may be advantageous.