MBR2050CT Equivalent & Substitute Parts

Part Overview

The MBR2050CT is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 50 V and average rectified current of 20A per diode. The device is packaged in TO-220-3 through-hole configuration and is classified as Active product status with full RoHS3 compliance.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design specifications permit operation within the electrical and mechanical parameters of equivalent devices. Substitution must maintain compatibility with the TO-220-3 package footprint and preserve the diode array configuration while meeting or exceeding the electrical performance requirements of the application.

Substiute Parts

MBR2050CT

Diodes IncorporatedIn Stock: 3302MBR2050CT Datasheet

Current PartRFQ

MBR2050CT

Fairchild SemiconductorIn Stock: 3252MBR2050CT Datasheet

DirectRFQ

MBR20L45CTG

onsemiIn Stock: 1813MBR20L45CTG Datasheet

MFR RecommendedRFQ

STPS2045CT

STMicroelectronicsIn Stock: 25174STPS2045CT Datasheet

MFR RecommendedRFQ

STPS40L45CT

STMicroelectronicsIn Stock: 17925STPS40L45CT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR2050CT is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Diode Configuration: 1 Pair Common Cathode (electrical topology must remain identical)
• Package / Case: TO-220-3 (mechanical footprint and pin assignment must match)
• Technology: Schottky (switching characteristics and forward voltage behavior must be consistent)
• Mounting Type: Through Hole (assembly method must be compatible)

Electrical Performance Parameters:

• Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 50 V
• Current - Average Rectified (Io) (per Diode): Substitute must equal or exceed 20A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (switching speed requirement)
• Operating Temperature - Junction: Substitute must support -55°C to 150°C minimum range

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (regulatory requirement)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (handling and storage compatibility)

Substitute parts that do not meet all mandatory compatibility parameters and electrical performance requirements are not electrically or mechanically interchangeable with the MBR2050CT.

Parameter Comparison

Engineering Selection Recommendations

MBR2050CT (Fairchild Semiconductor)

This part maintains identical electrical specifications to the Diodes Incorporated MBR2050CT with matching 50 V reverse voltage rating and TO-220-3 package configuration. Both devices are Active product status with ROHS3 compliance. The Fairchild variant is suitable for direct replacement in applications where the primary source becomes unavailable. Note that the average rectified current specification is not provided for the Fairchild variant; verification against application requirements is necessary before selection.

STPS40L45CT (STMicroelectronics)

This part provides the closest electrical performance match to the MBR2050CT among active substitute options. It maintains the 20A average rectified current rating and TO-220-3 package configuration. The reverse voltage rating is reduced to 45 V, which is acceptable only in applications where the circuit operates below 45 V. The device is Active product status with ROHS3 compliance and demonstrates superior forward voltage characteristics (530 mV @ 20 A versus 950 mV @ 20 A). This part is suitable for applications with voltage headroom below 50 V.

STPS2045CT (STMicroelectronics)

This part is Active product status with ROHS3 compliance and maintains the TO-220-3 package configuration. However, the average rectified current is reduced to 10A, which does not meet the 20A requirement of the MBR2050CT. This part is not suitable for applications requiring 20A per diode operation.

MBR20L45CTG (onsemi)

This part is classified as Obsolete product status. Although it maintains the 1 pair common cathode configuration and TO-220-3 package, the Obsolete classification indicates discontinued manufacturing and limited availability. The average rectified current is reduced to 10A, which does not meet the 20A requirement. This part is not recommended for new designs or long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can the MBR2050CT be replaced with the STPS2045CT?

A: The STPS2045CT is not a suitable replacement for the MBR2050CT in applications requiring 20A per diode operation. The STPS2045CT is rated for 10A average rectified current, which is insufficient for circuits designed around the 20A capability of the MBR2050CT. Both devices share the same TO-220-3 package and Schottky technology, but the current rating difference makes them incompatible for equivalent performance.

Q: What is the significance of the 50 V versus 45 V reverse voltage rating difference?

A: The MBR2050CT is rated for 50 V maximum reverse voltage, while STPS40L45CT and STPS2045CT are rated for 45 V. A substitute part with lower voltage rating can only be used in applications where the actual reverse voltage stress does not exceed 45 V. If the circuit design relies on the 50 V rating for safety margin or peak voltage transient protection, a 45 V rated device introduces risk of reverse breakdown. Voltage rating substitution is only acceptable when the application circuit operates with confirmed maximum reverse voltage below 45 V.

Q: Why is the MBR20L45CTG listed as Obsolete?

A: The MBR20L45CTG is classified as Obsolete product status, indicating that the manufacturer (onsemi) has discontinued production. Obsolete parts have limited inventory availability and no guaranteed future supply. While the part may still be available from existing stock, it is not recommended for new designs or applications requiring long-term component availability. Active product status alternatives such as STPS40L45CT should be prioritized for new designs.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All listed substitute parts use the TO-220-3 package configuration, which maintains identical mechanical footprint, pin spacing, and mounting hole dimensions. Through-hole assembly compatibility is preserved across all substitute options. However, electrical performance differences require circuit validation before substitution.

Q: What is the impact of forward voltage differences between the MBR2050CT and substitute parts?

A: The MBR2050CT exhibits 950 mV forward voltage at 20A, while the STPS40L45CT exhibits 530 mV at the same current level. Lower forward voltage reduces power dissipation and heat generation in the diode. If the original circuit design accounts for the 950 mV forward voltage drop in thermal or efficiency calculations, substitution with a lower forward voltage device will improve performance but does not create incompatibility. Conversely, substitution with a higher forward voltage device increases power dissipation and may require thermal management review.

Q: Can the Fairchild MBR2050CT be used as a direct replacement?

A: The Fairchild Semiconductor MBR2050CT maintains identical part number, package configuration, and reverse voltage rating to the Diodes Incorporated MBR2050CT. Both are Active product status with ROHS3 compliance. The Fairchild variant is suitable for direct replacement in applications where the primary source becomes unavailable. However, the average rectified current specification is not provided for the Fairchild variant in the available documentation. Verification of current rating compatibility with application requirements is necessary before final selection.

Q: What compliance certifications are maintained across all substitute parts?

A: All listed substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) classification. These certifications ensure compatibility with modern manufacturing processes and storage requirements. No substitute part introduces additional compliance restrictions or handling requirements beyond the original MBR2050CT specification.