STPS15M80CT Equivalent & Substitute Parts

Part Overview

The STPS15M80CT is a Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement with an 80 V reverse voltage rating and 7.5 A average rectified current per diode. The device is packaged in a Through Hole TO-220-3 configuration and is classified as Obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for production and repair applications.

Substiute Parts

STPS15M80CT

STMicroelectronicsIn Stock: 1112STPS15M80CT Datasheet

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DST2080C

Littelfuse Inc.In Stock: 1821DST2080C Datasheet

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DST3080C

Littelfuse Inc.In Stock: 703DST3080C Datasheet

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VT3080C-E3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 1124VT3080C-E3/4W Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS15M80CT is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

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

Allowable Variation Parameters:

• Current - Average Rectified (Io) (per Diode): Equal to or greater than 7.5 A
• Voltage - Forward (Vf) (Max) @ If: Equal to or less than 725 mV at rated current
• Current - Reverse Leakage @ Vr: Equal to or less than 25 µA @ 80 V
• Operating Temperature - Junction (Max): Equal to or greater than 175°C

All three substitute parts meet or exceed the critical matching parameters and fall within the allowable variation ranges for electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

DST2080C (Littelfuse Inc.) is suitable for applications where the current requirement does not exceed 10 A per diode. This part provides active product status and ROHS3 compliance. The forward voltage specification of 810 mV @ 10 A is acceptable for most rectification applications. However, the maximum junction temperature of 150°C is lower than the original STPS15M80CT specification of 175°C, which may limit use in high-temperature environments.

DST3080C (Littelfuse Inc.) and VT3080C-E3/4W (Vishay General Semiconductor - Diodes Division) are functionally equivalent alternatives with identical electrical specifications. Both support 15 A average rectified current per diode, providing design margin above the original 7.5 A requirement. Both parts maintain ROHS3 compliance and active product status. The maximum junction temperature of 150°C applies to both parts. The forward voltage specification of 820 mV @ 15 A is within acceptable parameters for rectification circuits.

All three substitute parts are available in active production status, ensuring long-term component availability. Selection between DST2080C and the 15 A alternatives (DST3080C or VT3080C-E3/4W) depends on the specific current requirements of the application. For applications requiring maximum design margin and thermal performance headroom, the 15 A rated alternatives are preferred.

Frequently Asked Questions (FAQ)

Q: Can DST2080C, DST3080C, or VT3080C-E3/4W be used as direct replacements for STPS15M80CT?

A: Yes, all three parts are direct replacements from a mechanical and electrical standpoint. All maintain the same diode configuration (1 Pair Common Cathode), Schottky technology, 80 V reverse voltage rating, and TO-220-3 package. The substitute parts meet or exceed the performance requirements of the original part.

Q: What is the difference between DST2080C and DST3080C?

A: The primary difference is the current rating. DST2080C is rated for 10 A average rectified current per diode, while DST3080C is rated for 15 A. Both parts share identical voltage ratings, package configuration, and Schottky technology. Selection depends on the application's current requirements.

Q: Are DST3080C and VT3080C-E3/4W interchangeable?

A: Yes, DST3080C and VT3080C-E3/4W are electrically and mechanically interchangeable. Both are rated for 15 A average rectified current per diode, 80 V reverse voltage, and are packaged in TO-220-3. The primary difference is the manufacturer: Littelfuse Inc. versus Vishay General Semiconductor - Diodes Division.

Q: What is the impact of the higher reverse leakage current in the substitute parts?

A: The substitute parts exhibit higher reverse leakage current (600–700 µA @ 80 V) compared to the original STPS15M80CT (25 µA @ 80 V). This difference is within acceptable parameters for Schottky diode technology and does not affect functionality in standard rectification applications. Applications with stringent leakage requirements should evaluate this parameter against specific design constraints.

Q: Does the lower maximum junction temperature of the substitute parts affect compatibility?

A: The substitute parts are rated for a maximum junction temperature of 150°C, compared to 175°C for the original STPS15M80CT. This difference may be significant in high-temperature applications. If the original design operates near or above 150°C junction temperature, thermal analysis is required to confirm the substitute part's suitability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all three substitute parts (DST2080C, DST3080C, and VT3080C-E3/4W) are ROHS3 compliant, matching the compliance status of the original STPS15M80CT.

Q: What is the advantage of using a higher-rated current part (15 A) in place of the original 7.5 A part?

A: Using a higher-rated current part provides design margin and thermal headroom. The 15 A rated alternatives (DST3080C and VT3080C-E3/4W) can handle the original 7.5 A requirement with reduced stress on the semiconductor junction, potentially extending component life and improving reliability in the application.