MBR4050PT Equivalent & Substitute Parts

Part Overview

The MBR4050PT is a Schottky diode array manufactured by Diodes Incorporated, configured as a 1 Pair Common Cathode device rated for 50 V DC reverse voltage and 40 A average rectified current per diode. The component is housed in a TO-3P-3 (SC-65-3) through-hole package and is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance is required within specified parameter tolerances, or when alternative packaging configurations are necessary for circuit board redesign, supply chain optimization, or thermal management considerations.

Substiute Parts

MBR4050PT

Diodes IncorporatedIn Stock: 3145MBR4050PT Datasheet

Current PartRFQ

STPS4045CWY

STMicroelectronicsIn Stock: 3448STPS4045CWY Datasheet

MFR RecommendedRFQ

STPS40L45CW

STMicroelectronicsIn Stock: 2345STPS40L45CW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBR4050PT are identified based on the following electrical and mechanical criteria:

Primary Substitution Parameters:

• Diode Configuration: 1 Pair Common Cathode (mandatory match)
• Technology: Schottky (mandatory match)
• Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 50 V
• Current - Average Rectified (Io) (per Diode): Substitute must equal or exceed 40 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• RoHS Status: ROHS3 Compliant (mandatory match)

Secondary Compatibility Parameters:

• Operating Temperature Range: Substitute must support the application's thermal requirements
• Package / Case: Alternative packages acceptable if board layout permits
• Forward Voltage (Vf): Lower values indicate improved efficiency; higher values acceptable within circuit design margins

The identified substitute parts (STPS4045CWY and STPS40L45CW) share identical diode configuration, Schottky technology, fast recovery speed, through-hole mounting, and RoHS3 compliance. Both substitute parts operate at reduced voltage and current ratings compared to the MBR4050PT, requiring circuit-level verification to confirm suitability for the intended application.

Parameter Comparison

Engineering Selection Recommendations

MBR4050PT (Primary Component)

The MBR4050PT remains the specified component when the application requires 50 V reverse voltage rating and 40 A average rectified current per diode. This part is Active status with full RoHS3 compliance and unlimited moisture sensitivity rating. The TO-3P-3 package provides established thermal and mechanical characteristics for through-hole mounting.

STPS4045CWY (STMicroelectronics)

The STPS4045CWY is suitable for applications where the circuit design operates at or below 45 V reverse voltage and 20 A average rectified current per diode. This part carries AEC-Q101 automotive qualification and operates across an extended temperature range (-40°C to 175°C). The TO-247-3 package differs from the MBR4050PT, requiring board layout modification. Forward voltage is 760 mV @ 20 A, representing a 5% reduction compared to the MBR4050PT. Active product status with RoHS3 compliance.

STPS40L45CW (STMicroelectronics)

The STPS40L45CW is suitable for applications where the circuit design operates at or below 45 V reverse voltage and 20 A average rectified current per diode. This part offers superior forward voltage performance at 530 mV @ 20 A, representing a 34% reduction compared to the MBR4050PT, resulting in lower power dissipation. The TO-247-3 package requires board layout modification. Maximum junction temperature is 150°C. Active product status with RoHS3 compliance.

Substitution Constraints

Both substitute parts operate at reduced voltage and current ratings. Substitution is valid only when the application circuit operates within these reduced specifications. The TO-247-3 package differs mechanically from the TO-3P-3 package, requiring verification of board layout compatibility and thermal management adequacy.

Frequently Asked Questions (FAQ)

Q: Can STPS4045CWY or STPS40L45CW be used as direct replacements for MBR4050PT?

A: Direct replacement is not applicable. Both substitute parts are rated for 45 V maximum reverse voltage and 20 A average rectified current per diode, compared to the MBR4050PT's 50 V and 40 A ratings. Substitution is valid only when the application circuit operates within the reduced voltage and current specifications of the substitute parts.

Q: What is the primary difference between STPS4045CWY and STPS40L45CW?

A: Both parts share identical voltage and current ratings (45 V, 20 A). The primary difference is forward voltage: STPS4045CWY operates at 760 mV @ 20 A, while STPS40L45CW operates at 530 mV @ 20 A. The STPS40L45CW exhibits lower forward voltage, resulting in reduced power dissipation and improved efficiency. STPS4045CWY carries AEC-Q101 automotive qualification.

Q: Are the substitute parts compatible with the MBR4050PT's TO-3P-3 package footprint?

A: No. Both substitute parts use TO-247-3 packages, which differ mechanically from the MBR4050PT's TO-3P-3 package. Board layout modification is required for substitution.

Q: Do the substitute parts meet the same compliance standards as the MBR4050PT?

A: Yes. All three parts are RoHS3 compliant, REACH unaffected, and carry ECCN EAR99 classification. Both substitute parts maintain unlimited moisture sensitivity rating (MSL 1). STPS4045CWY additionally carries AEC-Q101 automotive qualification.

Q: What is the temperature operating range for each part?

A: MBR4050PT operates from -65°C to 150°C junction temperature. STPS4045CWY operates from -40°C to 175°C, providing extended high-temperature capability. STPS40L45CW operates to a maximum junction temperature of 150°C.

Q: How do the reverse leakage currents compare?

A: MBR4050PT exhibits 1 mA reverse leakage @ 50 V. STPS4045CWY exhibits 200 µA @ 45 V. STPS40L45CW exhibits 600 µA @ 45 V. Direct comparison is not applicable due to different voltage ratings; however, STPS4045CWY demonstrates lower leakage current at its rated voltage.

Q: Are all three parts currently available?

A: Yes. MBR4050PT has 3089 pieces in stock. STPS4045CWY has 3400 pieces in stock. STPS40L45CW has 2300 pieces in stock. All parts are classified as Active product status.