STPS60L40CW Equivalent & Substitute Parts

Part Overview

The STPS60L40CW is a Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement with a maximum reverse voltage rating of 40 V and average rectified current of 30 A per diode. The device is packaged in a TO-247-3 through-hole configuration and is classified as obsolete. Due to its obsolete product status, equivalent substitute parts with compatible electrical and mechanical specifications are necessary for continued system design and procurement.

Substiute Parts

STPS60L40CW

STMicroelectronicsIn Stock: 2059STPS60L40CW Datasheet

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SR4040PT C0G

Taiwan Semiconductor CorporationIn Stock: 1149SR4040PT C0G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS60L40CW is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 40 V
• Mounting Type: Through Hole
• Package / Case: TO-247-3

Allowable Parameter Variations:

• Current - Average Rectified (Io) (per Diode): Equal to or greater than 30 A
• Voltage - Forward (Vf) (Max) @ If: Equal to or less than 550 mV
• Current - Reverse Leakage @ Vr: Equal to or less than 1.5 mA @ 40 V
• Operating Temperature - Junction: Equal to or greater than 150°C maximum
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

The SR4040PT C0G meets all mandatory matching criteria and operates within allowable parameter variations, qualifying it as a direct substitute for the STPS60L40CW.

Parameter Comparison

Engineering Selection Recommendations

The SR4040PT C0G qualifies as a functional substitute for the STPS60L40CW based on the following engineering criteria:

Electrical Compatibility: The SR4040PT C0G maintains identical reverse voltage rating (40 V) and diode configuration (1 Pair Common Cathode). The substitute provides higher average rectified current capacity (40 A versus 30 A), which is acceptable for applications designed for the 30 A specification. Forward voltage characteristics are equivalent at the rated operating point. Reverse leakage current is lower in the substitute, indicating superior performance in this parameter.

Mechanical and Thermal Compatibility: Both devices utilize identical through-hole mounting and TO-247-3 packaging, ensuring direct mechanical compatibility in PCB layouts and thermal management designs.

Regulatory and Compliance Status: Both parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards.

Product Availability: The SR4040PT C0G is classified as Active, providing assured long-term availability and supply chain continuity compared to the obsolete STPS60L40CW.

Thermal Consideration: The SR4040PT C0G specifies a maximum junction temperature of 125°C, which is lower than the STPS60L40CW specification of 150°C. Applications operating near the upper thermal limits of the original part require thermal analysis to confirm the substitute remains within acceptable operating margins.

Frequently Asked Questions (FAQ)

Q: Can the SR4040PT C0G be used as a direct replacement for the STPS60L40CW in existing designs?

A: Yes, the SR4040PT C0G is mechanically and electrically compatible for direct substitution. Both devices share identical TO-247-3 packaging, 40 V reverse voltage rating, and 1 Pair Common Cathode configuration. The substitute provides higher current capacity (40 A versus 30 A) and lower reverse leakage current, making it suitable for applications designed around the STPS60L40CW specifications.

Q: What is the significance of the higher current rating (40 A) in the SR4040PT C0G?

A: The SR4040PT C0G is rated for 40 A average rectified current per diode, compared to 30 A for the STPS60L40CW. This higher rating provides additional design margin and does not create compatibility issues in applications requiring 30 A or less. The substitute can handle the same or greater current loads without exceeding its specifications.

Q: Are there thermal differences between these two parts?

A: Yes. The STPS60L40CW specifies a maximum junction temperature of 150°C, while the SR4040PT C0G specifies -55°C to 125°C operating range with a 125°C maximum junction temperature. Applications operating at elevated temperatures near 150°C require verification that the SR4040PT C0G remains within acceptable thermal limits under the same operating conditions.

Q: Do both parts have the same package footprint?

A: Yes. Both the STPS60L40CW and SR4040PT C0G use the TO-247-3 package, ensuring identical PCB footprints and mechanical compatibility without layout modifications.

Q: What is the difference in forward voltage characteristics?

A: The STPS60L40CW specifies 550 mV maximum forward voltage at 30 A, while the SR4040PT C0G specifies 550 mV maximum at 20 A. Both devices exhibit equivalent forward voltage performance at their respective rated currents. The SR4040PT C0G forward voltage at 30 A may differ slightly from the specified value, but remains within acceptable Schottky diode performance parameters.

Q: Are both parts RoHS compliant?

A: Yes. Both the STPS60L40CW and SR4040PT C0G are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with current manufacturing standards and environmental regulations.

Q: Why is the STPS60L40CW classified as obsolete?

A: The STPS60L40CW is no longer in active production by STMicroelectronics. The SR4040PT C0G, classified as Active, provides continued availability and supply chain assurance for applications requiring equivalent Schottky diode array functionality.