MBR1045CT Equivalent & Substitute Parts

Part Overview

The MBR1045CT is a Schottky diode array manufactured by SMC Diode Solutions, configured as a 1 Pair Common Cathode device rated for 45 V DC reverse voltage. This through-hole component in TO-220-3 package is designed for fast recovery rectification applications with a maximum forward voltage of 700 mV at 5 A. The part is currently Active in product status with 19,820 units in stock.

Substitute parts are identified when design requirements permit operation within the specified electrical and mechanical parameters of alternative manufacturers' offerings. Equivalent parts maintain identical or superior performance characteristics while maintaining the same package configuration and core functionality.

Substiute Parts

MBR1045CT

SMC Diode SolutionsIn Stock: 19870MBR1045CT Datasheet

Current PartRFQ

MBR2545CTG

onsemiIn Stock: 15334MBR2545CTG Datasheet

SimilarRFQ

MBR2550CT

Diodes IncorporatedIn Stock: 3201MBR2550CT Datasheet

SimilarRFQ

MBR1045CT_T0_00001

Panjit International Inc.In Stock: 3087MBR1045CT_T0_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MBR1045CT is determined by the following critical parameters:

Primary Compatibility Criteria:

• Diode Configuration: 1 Pair Common Cathode (mandatory)
• Technology: Schottky (mandatory)
• Package / Case: TO-220-3 (mandatory)
• Mounting Type: Through Hole (mandatory)
• Voltage - DC Reverse (Vr) (Max): 45 V or greater (minimum requirement)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory)

Secondary Performance Criteria:

• Voltage - Forward (Vf) (Max) @ If: Equal or lower values indicate improved performance
• Current - Reverse Leakage @ Vr: Lower values indicate improved performance
• Operating Temperature - Junction: Extended ranges provide design flexibility
• RoHS Status: ROHS3 Compliant (regulatory requirement)

Substitute parts are grouped into two categories: Similar Manufacturer Parts (enhanced current ratings) and Parametric Equivalents (matched specifications).

Parameter Comparison

Engineering Selection Recommendations

MBR2545CTG (onsemi) - Similar Manufacturer Part

The MBR2545CTG is a direct substitute for applications requiring enhanced current handling. This part maintains the 45 V reverse voltage rating and TO-220-3 package while providing 15 A average rectified current per diode. The forward voltage is reduced to 620 mV at 15 A, indicating improved efficiency at higher current levels. Operating temperature range extends to 175°C, providing additional thermal margin. Product status is Active with ROHS3 compliance. This part is suitable for designs where current capacity exceeds the MBR1045CT specification.

MBR2550CT (Diodes Incorporated) - Similar Manufacturer Part

The MBR2550CT provides a 50 V reverse voltage rating with 15 A current capacity in the same TO-220-3 package. This part offers voltage margin above the 45 V requirement and is ROHS3 compliant. However, product status is Obsolete, indicating limited long-term availability. Forward voltage is 750 mV at 15 A. This part is suitable only for applications where 50 V rating is required and obsolescence risk is acceptable.

MBR1045CT_T0_00001 (Panjit International Inc.) - Parametric Equivalent

The MBR1045CT_T0_00001 is a parametric equivalent manufactured by Panjit International Inc., maintaining the 45 V reverse voltage and TO-220-3 package configuration. This part provides 10 A average rectified current with forward voltage of 700 mV at 5 A, matching the MBR1045CT specification. Reverse leakage current is reduced to 50 µA at 45 V, indicating superior leakage performance. Operating temperature range extends to 175°C. Product status is Active with ROHS3 compliance and REACH Unaffected status. This part is suitable as a direct replacement where current requirements do not exceed 10 A.

Frequently Asked Questions (FAQ)

Q: Can the MBR2545CTG replace the MBR1045CT in all applications?

A: The MBR2545CTG is electrically compatible with the MBR1045CT when the application circuit can accommodate the enhanced 15 A current rating. Both parts maintain the 45 V reverse voltage, TO-220-3 package, and fast recovery Schottky technology. The MBR2545CTG provides improved forward voltage characteristics at higher currents. Verification of circuit design limits is required to confirm suitability.

Q: What is the difference between the MBR1045CT and MBR1045CT_T0_00001?

A: Both parts are Schottky diode arrays with 1 Pair Common Cathode configuration, 45 V reverse voltage rating, and TO-220-3 package. The MBR1045CT_T0_00001 is manufactured by Panjit International Inc. and provides 10 A average rectified current with superior reverse leakage characteristics (50 µA versus 1 mA). Operating temperature range extends to 175°C. Both parts are ROHS3 compliant and Active in product status.

Q: Why is the MBR2550CT listed as Obsolete?

A: The MBR2550CT is designated Obsolete by Diodes Incorporated, indicating the manufacturer has discontinued active production and support. While 3,150 units remain in inventory, long-term availability cannot be assured. For new designs, the MBR2545CTG or MBR1045CT_T0_00001 are recommended as Active alternatives.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts—MBR2545CTG, MBR2550CT, and MBR1045CT_T0_00001—are ROHS3 compliant, matching the regulatory status of the MBR1045CT. This compliance applies to all parts in this substitution group.

Q: What is the significance of the TO-220-3 package specification?

A: The TO-220-3 package is a through-hole component with three leads, standardized for diode array applications. All substitute parts maintain this identical package configuration, ensuring mechanical and thermal compatibility with existing PCB layouts and thermal management solutions. No board redesign is required when substituting between parts with this package specification.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage (Vf) differences between substitute parts affect power dissipation and voltage drop across the diode. The MBR2545CTG exhibits 620 mV at 15 A, while the MBR1045CT specifies 700 mV at 5 A. Lower forward voltage reduces heat generation and improves efficiency. Circuit design must account for the specific forward voltage of the selected part to ensure proper voltage regulation and thermal management.

Q: Can the MBR1045CT_T0_00001 be used in high-temperature applications?

A: The MBR1045CT_T0_00001 supports operating junction temperatures up to 175°C, compared to 150°C for the MBR1045CT. This extended range provides additional thermal margin for applications operating near maximum temperature limits. However, circuit design must ensure that actual junction temperature remains within the specified range under worst-case operating conditions.