STPS15SM80CT Equivalent & Substitute Parts

Part Overview

The STPS15SM80CT 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 TO-220-3 through-hole format and is classified as obsolete. Due to its obsolete status, equivalent substitute parts with compatible electrical and mechanical specifications are necessary for continued system design and maintenance applications.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	80 V
Current - Average Rectified (Io) (per Diode)	7.5 A
Voltage - Forward (Vf) (Max) @ If	780 mV @ 7.5 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Through Hole
Package / Case	TO-220-3
Operating Temperature - Junction (Max)	175°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the STPS15SM80CT are selected based on strict electrical and mechanical compatibility criteria. The following parameters must align with the main part specification:

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

Substitute parts may exceed the current rating of the main part (7.5 A) while maintaining all other electrical and mechanical parameters. Forward voltage characteristics and reverse leakage current may vary within the Schottky diode technology specifications. All substitute parts must maintain RoHS3 compliance and fast recovery speed characteristics.

Parameter Comparison

Parameter	STPS15SM80CT (Main)	DST2080C (Substitute)	DST3080C (Substitute)
Manufacturer	STMicroelectronics	Littelfuse Inc.	Littelfuse Inc.
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	80 V	80 V	80 V
Current - Average Rectified (Io) (per Diode)	7.5 A	10 A	15 A
Voltage - Forward (Vf) (Max) @ If	780 mV @ 7.5 A	810 mV @ 10 A	820 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	20 µA @ 80 V	600 µA @ 80 V	700 µA @ 80 V
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

The STPS15SM80CT is classified as obsolete and no longer in active production. Both DST2080C and DST3080C are active products from Littelfuse Inc. and maintain full ROHS3 compliance, making them suitable for applications requiring continued component availability.

DST2080C provides a current rating of 10 A per diode, exceeding the main part specification by 2.5 A while maintaining identical reverse voltage and package specifications. This part is appropriate for applications where the original 7.5 A rating is sufficient and additional current margin is acceptable.

DST3080C provides a current rating of 15 A per diode, exceeding the main part specification by 7.5 A while maintaining identical reverse voltage and package specifications. This part is appropriate for applications requiring higher current capacity or where future design margin is necessary.

Both substitute parts exhibit higher reverse leakage current (600 µA and 700 µA respectively) compared to the main part (20 µA), and slightly elevated forward voltage characteristics. These differences are within normal Schottky diode technology variations and do not affect functional compatibility in standard rectification applications.

Frequently Asked Questions (FAQ)

Q: Can DST2080C or DST3080C be used as direct replacements for STPS15SM80CT?

A: Both DST2080C and DST3080C are electrically and mechanically compatible with STPS15SM80CT. All three parts share identical diode configuration (1 Pair Common Cathode), technology (Schottky), reverse voltage rating (80 V), mounting type (Through Hole), and package format (TO-220-3). The substitute parts are active products with current availability.

Q: What is the difference between DST2080C and DST3080C?

A: The primary difference is the current rating per diode. DST2080C is rated for 10 A average rectified current, while DST3080C is rated for 15 A. Both maintain the same 80 V reverse voltage specification and TO-220-3 package. Selection between these two depends on the application's current requirements.

Q: Are there any thermal considerations when substituting these parts?

A: The STPS15SM80CT specifies a maximum junction operating temperature of 175°C. The DST2080C and DST3080C specify an operating temperature range of -55°C to 150°C. Applications operating near the upper temperature limit of the original part may require thermal analysis when using substitute parts.

Q: Do the substitute parts have the same packaging format?

A: All three parts use TO-220-3 through-hole packaging and are mechanically compatible. The STPS15SM80CT is supplied in standard packaging, while DST2080C and DST3080C are supplied in tube packaging. This difference does not affect electrical or mechanical compatibility.

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

A: The substitute parts exhibit higher reverse leakage current (600-700 µA) compared to the main part (20 µA). This is a normal characteristic variation within Schottky diode technology and does not affect functionality in standard rectification applications. Applications with specific leakage current requirements should evaluate this parameter against design specifications.

Q: Are all three parts RoHS compliant?

A: All three parts are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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