MBR1040CT Equivalent & Substitute Parts

Part Overview

The MBR1040CT is a Schottky diode array manufactured by Diodes Incorporated, configured as a 1 Pair Common Cathode device rated for 40 V DC reverse voltage and 10 A average rectified current per diode. The component is packaged in a Through Hole TO-220-3 configuration and features fast recovery characteristics with a maximum forward voltage of 840 mV at 10 A.

The MBR1040CT is classified as Obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where the original part is no longer readily procurable from primary sources.

Substiute Parts

MBR1040CT

Diodes IncorporatedIn Stock: 17600MBR1040CT Datasheet

Current PartRFQ

DSSK20-0045AM

IXYSIn Stock: 1939DSSK20-0045AM Datasheet

MFR RecommendedRFQ

STPS2045CT

STMicroelectronicsIn Stock: 25174STPS2045CT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBR1040CT must satisfy the following criteria based on allowed electrical and mechanical parameters:

Mandatory Compatibility Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Current - Average Rectified (Io) (per Diode): 10 A minimum
• Voltage - DC Reverse (Vr) (Max): 40 V minimum
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
• Mounting Type: Through Hole
• Package / Case: TO-220-3 or equivalent TO-220 variant

Acceptable Parameter Variations:

• Voltage - DC Reverse (Vr) (Max): May exceed 40 V (higher voltage rating provides backward compatibility)
• Voltage - Forward (Vf) (Max) @ If: May be lower than 840 mV (improved performance characteristic)
• Current - Reverse Leakage @ Vr: May vary within acceptable operating ranges
• Operating Temperature - Junction: May exceed -55°C ~ 150°C range (extended temperature capability)

Substitute parts identified in this reference meet all mandatory compatibility parameters and are suitable for direct replacement in applications designed for the MBR1040CT.

Parameter Comparison

Engineering Selection Recommendations

STPS2045CT (STMicroelectronics) is the primary substitute for the MBR1040CT. This part is classified as Active, ensuring long-term availability and supply chain continuity. The STPS2045CT meets all mandatory electrical and mechanical compatibility parameters, with a 45 V reverse voltage rating that exceeds the original 40 V specification. The forward voltage of 570 mV at 10 A represents improved performance compared to the MBR1040CT's 840 mV specification. The component maintains ROHS3 compliance and MSL 1 rating, with an extended maximum junction temperature of 175°C. Packaging is standard TO-220-3 Through Hole configuration.

DSSK20-0045AM (IXYS) is an alternative substitute for the MBR1040CT. This part is classified as Active and meets all mandatory electrical and mechanical compatibility parameters. The DSSK20-0045AM features a 45 V reverse voltage rating and 10 A current rating. The forward voltage of 690 mV at 10 A is lower than the original part. The component maintains ROHS3 compliance and MSL 1 rating, with an extended maximum junction temperature of 175°C. The package variant is TO-220-3 Full Pack with Isolated Tab, which provides additional thermal and electrical isolation characteristics compared to standard TO-220-3 packaging.

Both substitute parts provide equivalent or superior electrical performance while offering improved product status and extended temperature operating ranges compared to the obsolete MBR1040CT.

Frequently Asked Questions (FAQ)

Q: Can the STPS2045CT directly replace the MBR1040CT in existing designs?

A: Yes. The STPS2045CT meets all mandatory compatibility parameters: 1 Pair Common Cathode configuration, Schottky technology, 10 A current rating, 45 V reverse voltage (exceeds the 40 V requirement), fast recovery characteristics, and Through Hole TO-220-3 packaging. The higher voltage rating and lower forward voltage represent improved performance characteristics.

Q: What is the difference between the DSSK20-0045AM and STPS2045CT?

A: Both parts meet the core electrical requirements for substitution. The primary differences are: (1) Manufacturer: IXYS versus STMicroelectronics; (2) Package variant: DSSK20-0045AM uses TO-220-3 Full Pack with Isolated Tab, while STPS2045CT uses standard TO-220-3; (3) Forward voltage: DSSK20-0045AM at 690 mV versus STPS2045CT at 570 mV; (4) Reverse leakage: DSSK20-0045AM at 300 µA versus STPS2045CT at 100 µA. The isolated tab variant of the DSSK20-0045AM may provide additional thermal management benefits in specific thermal design applications.

Q: Why is the MBR1040CT classified as Obsolete?

A: The MBR1040CT is no longer in active production. Substitute parts with Active status ensure continued availability and support for new designs and production requirements.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both STPS2045CT and DSSK20-0045AM are ROHS3 compliant, matching the compliance status of the original MBR1040CT.

Q: What is the significance of the higher voltage rating (45 V) in the substitute parts?

A: The 45 V reverse voltage rating in both substitute parts exceeds the original 40 V specification. This higher rating provides additional design margin and ensures the parts operate safely in applications designed for the 40 V MBR1040CT. Higher voltage ratings do not negatively impact performance in lower voltage applications.

Q: Does the isolated tab variant of the DSSK20-0045AM affect compatibility?

A: The isolated tab is a package variant feature that provides electrical isolation between the tab and the semiconductor junction. This feature does not affect electrical compatibility with the MBR1040CT. The isolated tab may be beneficial in thermal management designs where the tab requires electrical isolation from the heat sink.

Q: What is the moisture sensitivity level (MSL) and why is it important?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions. Both the original MBR1040CT and substitute parts carry MSL 1 rating, meaning they can be stored and handled without special moisture control measures.