STPS40M80CT Equivalent & Substitute Parts

Part Overview

The STPS40M80CT is an active Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement with 80 V reverse voltage rating and 20 A average rectified current per diode. The device is packaged in a Through Hole TO-220-3 case and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). This component is used in power rectification applications requiring fast recovery characteristics and low forward voltage drop. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications where the primary part number becomes unavailable or where alternative sourcing is required.

Substiute Parts

STPS40M80CT

STMicroelectronicsIn Stock: 2185STPS40M80CT Datasheet

Current PartRFQ

MBR4080CT

SMC Diode SolutionsIn Stock: 1629MBR4080CT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS40M80CT is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 80 V
• Mounting Type: Through Hole
• Package / Case: TO-220-3

Allowable Parameter Variations: Substitute parts may exhibit differences in forward voltage (Vf), reverse leakage current, and maximum junction temperature, provided the reverse voltage rating and current handling capability remain equal to or greater than the primary part specifications. These variations are acceptable within the scope of Schottky diode array technology and do not compromise functional compatibility in standard rectification applications.

The MBR4080CT from SMC Diode Solutions meets all mandatory matching parameters and is classified as a direct substitute for the STPS40M80CT.

Parameter Comparison

Engineering Selection Recommendations

STPS40M80CT (Primary Part): The STPS40M80CT is the preferred selection for new designs and applications where STMicroelectronics sourcing is established. This part is active, ROHS3 compliant, and REACH unaffected. The device exhibits lower forward voltage (735 mV @ 20 A) and lower reverse leakage current (65 µA @ 80 V), resulting in reduced power dissipation and improved efficiency in rectification circuits. Maximum junction temperature rating of 175°C supports operation in higher ambient temperature environments.

MBR4080CT (Substitute Part): The MBR4080CT is a functional equivalent suitable for applications where STPS40M80CT availability is constrained or where SMC Diode Solutions sourcing is preferred. This part is active and ROHS3 compliant. The MBR4080CT exhibits higher forward voltage (880 mV @ 20 A) and higher reverse leakage current (1 mA @ 80 V) compared to the primary part. The maximum junction temperature is limited to 150°C. These characteristics result in increased power dissipation and are acceptable for applications with thermal design margins sufficient to accommodate the additional heat generation. Both parts share identical reverse voltage rating (80 V), diode configuration (1 Pair Common Cathode), technology (Schottky), and package (TO-220-3).

Selection between these parts is determined by availability, supplier relationship, thermal design requirements, and efficiency specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can the MBR4080CT be used as a direct replacement for the STPS40M80CT in existing designs?

A: Yes. Both parts are Schottky diode arrays with 1 Pair Common Cathode configuration, 80 V reverse voltage rating, and TO-220-3 Through Hole packaging. Electrical and mechanical compatibility is established. However, the MBR4080CT exhibits higher forward voltage drop (880 mV vs. 735 mV @ 20 A) and higher reverse leakage current (1 mA vs. 65 µA @ 80 V), resulting in increased power dissipation. Thermal design verification is required to confirm that the application's heat dissipation capability accommodates the additional power loss.

Q: What are the key differences between STPS40M80CT and MBR4080CT?

A: The primary differences are forward voltage, reverse leakage current, and maximum junction temperature. The STPS40M80CT has lower forward voltage (735 mV @ 20 A) and lower reverse leakage (65 µA @ 80 V), with a maximum junction temperature of 175°C. The MBR4080CT has higher forward voltage (880 mV @ 20 A) and higher reverse leakage (1 mA @ 80 V), with a maximum junction temperature of 150°C. Both parts meet the same reverse voltage (80 V) and diode configuration requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the STPS40M80CT and MBR4080CT are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level. The STPS40M80CT is REACH unaffected, while the MBR4080CT is REACH affected.

Q: What is the significance of the TO-220-3 package for these diode arrays?

A: The TO-220-3 package is a Through Hole surface mount configuration with three leads, suitable for Through Hole PCB assembly. This package provides robust mechanical connection and is standard for power rectification applications. Both the STPS40M80CT and MBR4080CT use identical TO-220-3 packaging, ensuring mechanical and electrical pin compatibility.

Q: Can these parts be used interchangeably in high-temperature applications?

A: The STPS40M80CT supports higher maximum junction temperature (175°C) compared to the MBR4080CT (150°C). For applications operating near or above 150°C junction temperature, the STPS40M80CT is the appropriate selection. The MBR4080CT is suitable for applications with maximum junction temperatures not exceeding 150°C.

Q: What is the impact of higher forward voltage in the MBR4080CT?

A: The MBR4080CT exhibits 145 mV higher forward voltage drop at 20 A (880 mV vs. 735 mV). In rectification circuits, this results in increased power dissipation and heat generation. For a 20 A load, the additional power loss is approximately 2.9 W per diode. Thermal design analysis is required to confirm that the application's heat sink and PCB thermal design can accommodate this additional dissipation.