STPS40SM80CFP Equivalent & Substitute Parts

Part Overview

The STPS40SM80CFP is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 80 V reverse voltage rating and 20 A average rectified current per diode. The component is packaged in TO-220-3 Full Pack through-hole configuration. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

STPS40SM80CFP

STMicroelectronicsIn Stock: 1051STPS40SM80CFP Datasheet

Current PartRFQ

DSTF2080C

Littelfuse Inc.In Stock: 770DSTF2080C Datasheet

DirectRFQ

MBRF4080CTL

SMC Diode SolutionsIn Stock: 780MBRF4080CTL Datasheet

DirectRFQ

MBR2080CT-G

Comchip TechnologyIn Stock: 1070MBR2080CT-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STPS40SM80CFP is determined by the following critical parameters:

Primary Substitution Criteria:

• Diode configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 80 V
• Mounting Type: Through Hole
• Package Category: TO-220-3 Full Pack variants

Secondary Compatibility Factors:

• Current - Average Rectified (Io) (per Diode): Equal to or greater than 20 A
• Voltage - Forward (Vf) (Max): Within acceptable operating parameters
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS3 Compliance

Substitute parts are classified into two categories:

Direct Substitutes: Parts meeting all primary criteria with current ratings equal to or exceeding 20 A and compatible package configurations.

Similar Substitutes: Parts meeting primary criteria with current ratings below 20 A or package variations (isolated tab configurations), suitable for applications with reduced current requirements.

Parameter Comparison

Engineering Selection Recommendations

MBR2080CT-G (Comchip Technology) - Direct Substitute

The MBR2080CT-G is the primary direct substitute for the STPS40SM80CFP. This component matches the 20 A current rating and maintains identical 80 V reverse voltage specification. Both parts share the same diode configuration, Schottky technology, and through-hole TO-220-3 package category. The MBR2080CT-G is currently active in production, ensuring long-term availability. RoHS3 compliance and REACH unaffected status align with the original part specifications. Forward voltage at 20 A is 950 mV compared to 800 mV for the original part, representing a 150 mV increase that must be evaluated within circuit thermal and efficiency requirements.

MBRF4080CTL (SMC Diode Solutions) - Alternative Substitute

The MBRF4080CTL provides an alternative option with improved forward voltage characteristics (750 mV @ 20 A). This part maintains 80 V reverse voltage and through-hole TO-220-3 configuration with isolated tab. The isolated tab package variant may require PCB layout verification for thermal management compatibility. Current rating is not specified in available documentation. The component is active in production with RoHS3 compliance. REACH affected status differs from the original part and must be considered in supply chain compliance requirements.

DSTF2080C (Littelfuse Inc.) - Reduced Current Substitute

The DSTF2080C is suitable for applications with reduced current requirements up to 10 A per diode. This part maintains 80 V reverse voltage, Schottky technology, and through-hole mounting in TO-220-3 Full Pack with isolated tab configuration. The component is active in production with RoHS3 compliance and REACH unaffected status. Forward voltage is 810 mV @ 10 A. Reverse leakage current is elevated at 600 µA @ 80 V compared to 50 µA for the original part. Operating temperature range is -55°C to 150°C, with maximum junction temperature 25°C lower than the original specification.

Frequently Asked Questions (FAQ)

Q: Can the MBR2080CT-G directly replace the STPS40SM80CFP without circuit modifications?

A: The MBR2080CT-G is electrically compatible as a direct substitute, matching the 20 A current rating and 80 V reverse voltage. However, the forward voltage difference (950 mV versus 800 mV at 20 A) affects power dissipation and thermal performance. Circuit thermal analysis is required to confirm acceptability within design margins.

Q: What is the significance of the isolated tab package variant in MBRF4080CTL and DSTF2080C?

A: The isolated tab configuration electrically isolates the tab from the cathode connection, differing from the standard full pack configuration. This affects PCB layout and thermal management design. Verify mounting hole compatibility and thermal pad requirements with your PCB design specifications.

Q: Is the DSTF2080C suitable for 20 A applications?

A: No. The DSTF2080C is rated for 10 A average rectified current per diode, half the original STPS40SM80CFP specification. This part is applicable only to applications with maximum current requirements of 10 A or less.

Q: What compliance differences exist between substitute options?

A: All substitute parts are RoHS3 compliant. The MBRF4080CTL is REACH affected, while DSTF2080C and MBR2080CT-G are REACH unaffected. Verify REACH compliance requirements within your supply chain and regulatory environment before final selection.

Q: How do reverse leakage current differences impact circuit performance?

A: The original STPS40SM80CFP specifies 50 µA reverse leakage at 80 V. The MBR2080CT-G maintains 100 µA, DSTF2080C increases to 600 µA, and MBRF4080CTL reaches 1 mA. Higher reverse leakage increases standby power consumption and may affect precision analog circuits. Evaluate leakage impact within your specific application requirements.

Q: Are there operating temperature limitations with substitute parts?

A: The original part specifies 175°C maximum junction temperature. All substitute parts limit operation to 150°C maximum, representing a 25°C reduction. Verify thermal design margins accommodate this constraint, particularly in high-temperature environments.