STPS40120CT Equivalent & Substitute Parts

Part Overview

The STPS40120CT is an active Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode rectifier with 120 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).

Equivalent and substitute parts are identified when design requirements permit operation within specified electrical and mechanical parameter ranges, or when component availability necessitates alternative sourcing while maintaining circuit functionality.

Substiute Parts

STPS40120CT

STMicroelectronicsIn Stock: 1954STPS40120CT Datasheet

Current PartRFQ

SBR20A120CT

Diodes IncorporatedIn Stock: 60352SBR20A120CT Datasheet

SimilarRFQ

MBR20L120CT

Taiwan Semiconductor CorporationIn Stock: 1862MBR20L120CT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STPS40120CT are classified based on the following substitution criteria:

Parametric Equivalents maintain identical or superior electrical performance across all critical parameters:

• Voltage - DC Reverse (Vr) (Max): 120 V minimum
• Current - Average Rectified (Io) (per Diode): 20 A minimum
• Diode Configuration: 1 Pair Common Cathode
• Mounting Type: Through Hole
• Package / Case: TO-220-3 compatible
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS3 Compliance

Functional Substitutes provide equivalent circuit functionality with reduced current rating but maintain voltage and configuration specifications:

• Voltage - DC Reverse (Vr) (Max): 120 V
• Diode Configuration: 1 Pair Common Cathode
• Mounting Type: Through Hole
• Package / Case: TO-220-3 compatible
• Current - Average Rectified (Io) (per Diode): ≥ 10 A (reduced from 20 A)

Parameter Comparison

Engineering Selection Recommendations

MBR20L120CT (Taiwan Semiconductor Corporation) is a parametric equivalent suitable for direct replacement in applications requiring 20 A average rectified current at 120 V reverse voltage. This part maintains identical current and voltage ratings, Schottky technology, and TO-220-3 package compatibility. Both parts are RoHS3 compliant, REACH unaffected, and carry unlimited moisture sensitivity level. The MBR20L120CT exhibits superior reverse leakage characteristics (20 µA versus 25 µA at 120 V) and operates within a defined temperature range of -55°C to 150°C, compared to the STPS40120CT maximum junction temperature of 175°C.

SBR20A120CT (Diodes Incorporated) is a functional substitute applicable in circuits where the average rectified current requirement does not exceed 10 A per diode. This part maintains the 120 V reverse voltage rating, 1 Pair Common Cathode configuration, and TO-220-3 package. The SBR20A120CT employs Super Barrier technology and demonstrates lower forward voltage drop (790 mV at 10 A) compared to the main part. All three devices are RoHS3 compliant and REACH unaffected. The SBR20A120CT supports an extended operating temperature range of -65°C to 175°C.

Selection between these parts depends on circuit current requirements and thermal operating conditions. All substitute parts maintain fast recovery switching characteristics and are suitable for rectification applications requiring 120 V blocking voltage.

Frequently Asked Questions (FAQ)

Q: Can the MBR20L120CT replace the STPS40120CT in all applications?

A: The MBR20L120CT is a parametric equivalent with identical voltage and current ratings (120 V, 20 A per diode), matching diode configuration, and compatible TO-220-3 package. Both parts are RoHS3 compliant and REACH unaffected. Replacement is suitable for applications operating within the MBR20L120CT temperature range of -55°C to 150°C. The STPS40120CT supports operation to 175°C maximum junction temperature.

Q: Under what conditions is the SBR20A120CT suitable as a substitute?

A: The SBR20A120CT is suitable for applications where the average rectified current per diode does not exceed 10 A. The part maintains the 120 V reverse voltage rating and 1 Pair Common Cathode configuration. The SBR20A120CT is appropriate for lower-current rectification circuits and offers superior reverse leakage performance (100 µA at 120 V) and extended temperature range (-65°C to 175°C).

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

A: All three parts use the TO-220-3 package and Through Hole mounting type, providing mechanical compatibility with identical PCB footprints. The STPS40120CT and MBR20L120CT use standard TO-220 and TO-220AB supplier packages respectively, while the SBR20A120CT uses TO-220-3 supplier package designation. Pin configuration and lead spacing are compatible across all three parts.

Q: What are the compliance differences between these parts?

A: All three parts are RoHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level 1 (unlimited). Compliance status is identical across STPS40120CT, MBR20L120CT, and SBR20A120CT. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: How do forward voltage characteristics compare?

A: The STPS40120CT and MBR20L120CT both exhibit 900 mV maximum forward voltage at 20 A. The SBR20A120CT demonstrates 790 mV maximum forward voltage at 10 A. Forward voltage comparison at identical current levels requires reference to detailed datasheets, as the SBR20A120CT specification is provided at reduced current rating.

Q: What is the difference between Schottky and Super Barrier technology in these parts?

A: The STPS40120CT and MBR20L120CT employ Schottky technology, while the SBR20A120CT uses Super Barrier technology. Both technologies provide fast recovery switching characteristics (≤ 500ns, > 200mA). Technology selection does not affect substitution eligibility when electrical parameters and package compatibility are maintained.