MBR1540CT Equivalent & Substitute Parts

Part Overview

The MBR1540CT is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 40 V and average rectified current of 15 A per diode. The device is packaged in TO-220-3 through-hole configuration and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing design support and procurement continuity.

Substiute Parts

MBR1540CT

Diodes IncorporatedIn Stock: 2083MBR1540CT Datasheet

Current PartRFQ

MBR1535CTG

onsemiIn Stock: 18865MBR1535CTG Datasheet

MFR RecommendedRFQ

MBR1545CTG

onsemiIn Stock: 28286MBR1545CTG Datasheet

MFR RecommendedRFQ

MBR2045CT-BP

Micro Commercial CoIn Stock: 1122MBR2045CT-BP Datasheet

MFR RecommendedRFQ

15CTQ040

SMC Diode SolutionsIn Stock: 183915CTQ040 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR1540CT is determined by the following critical parameters: diode configuration (1 pair common cathode), technology (Schottky), package type (TO-220-3 through-hole), and electrical ratings (voltage and current specifications).

Substitute parts are grouped into two categories:

Manufacturer Recommended Substitutes: Parts that maintain the same diode configuration and package type while meeting or exceeding the electrical requirements of the original part. These include the MBR1535CTG, MBR1545CTG, and MBR2045CT-BP.

Parametric Equivalent: The 15CTQ040 provides identical electrical specifications (40 V, 15 A) and package configuration, making it a direct parametric match.

The key parameters governing substitution are:

• Diode Configuration: 1 Pair Common Cathode
• Package / Case: TO-220-3
• Voltage - DC Reverse (Vr) (Max): ≥ 40 V
• Current - Average Rectified (Io) (per Diode): ≥ 15 A
• Mounting Type: Through Hole

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalent: The 15CTQ040 from SMC Diode Solutions provides identical electrical specifications to the MBR1540CT with 40 V reverse voltage and 15 A average rectified current. This part is active in production status and ROHS3 compliant, making it suitable for direct substitution in applications requiring exact parameter matching.

Higher Voltage Rating Substitutes: The MBR1545CTG (onsemi) and MBR2045CT-BP (Micro Commercial Co) both offer 45 V reverse voltage ratings, exceeding the original 40 V specification. The MBR1545CTG maintains the 7.5 A current rating and is active in production. The MBR2045CT-BP provides enhanced current capability at 20 A, suitable for applications requiring higher current capacity. Both parts are ROHS3 compliant or unaffected by REACH regulations.

Lower Current Rating Substitute: The MBR1535CTG (onsemi) operates at 35 V with 7.5 A current rating. This part is suitable only for applications where the reduced voltage and current specifications are acceptable. It is ROHS3 compliant and offers extended operating temperature range to 175°C.

Production Status Consideration: The MBR1545CTG and MBR2045CT-BP are active production parts, providing long-term availability. The MBR1535CTG is obsolete, similar to the original MBR1540CT.

Frequently Asked Questions (FAQ)

Q: Can the MBR1535CTG be used as a direct replacement for the MBR1540CT?

A: The MBR1535CTG has reduced electrical ratings (35 V, 7.5 A) compared to the MBR1540CT (40 V, 15 A). It is suitable only for applications where both the voltage and current requirements are within the MBR1535CTG specifications. The part shares the same diode configuration, technology, and TO-220-3 package.

Q: What is the difference between the MBR1545CTG and MBR2045CT-BP?

A: Both parts operate at 45 V reverse voltage. The MBR1545CTG is rated for 7.5 A average rectified current, while the MBR2045CT-BP is rated for 20 A. The MBR2045CT-BP provides higher current capacity and is suitable for applications requiring increased current handling. Both maintain the TO-220-3 package and Schottky technology.

Q: Is the 15CTQ040 a suitable replacement for the MBR1540CT?

A: The 15CTQ040 provides identical electrical specifications (40 V, 15 A) and package configuration (TO-220-3). It is a parametric equivalent manufactured by SMC Diode Solutions and is active in production status. The part is ROHS3 compliant and suitable for direct substitution.

Q: What are the temperature operating range differences among substitute parts?

A: The MBR1540CT operates from -65°C to 150°C. The MBR1535CTG and MBR1545CTG extend the upper limit to 175°C. The MBR2045CT-BP and 15CTQ040 operate from -55°C to 150°C, with a higher minimum temperature limit. Application requirements determine the appropriate selection.

Q: Are all substitute parts ROHS3 compliant?

A: The MBR1540CT, MBR1535CTG, MBR1545CTG, and 15CTQ040 are all ROHS3 compliant. The MBR2045CT-BP RoHS status is not specified in the provided data.

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

A: The TO-220-3 package is a through-hole configuration with three leads. All listed substitute parts maintain this package type, ensuring mechanical and electrical compatibility with existing PCB layouts and mounting hardware. Package compatibility is a primary substitution criterion.

Q: How does reverse leakage current affect part selection?

A: The MBR1540CT specifies 100 µA reverse leakage at 40 V. The 15CTQ040 specifies 1 mA at 40 V, representing higher leakage. Other substitutes maintain 100 µA leakage at their respective voltage ratings. Application sensitivity to leakage current determines whether the 15CTQ040 is acceptable.