STPS40L40CT Equivalent & Substitute Parts

Part Overview

The STPS40L40CT is a Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement with 40 V reverse voltage rating and 20 A average rectified current per diode. The device is packaged in TO-220-3 through-hole format and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for production and repair applications.

Substiute Parts

STPS40L40CT

STMicroelectronicsIn Stock: 2453STPS40L40CT Datasheet

Current PartRFQ

MBR2040CT

Diodes IncorporatedIn Stock: 1542MBR2040CT Datasheet

SimilarRFQ

SBR4040CT

Diodes IncorporatedIn Stock: 15771SBR4040CT Datasheet

SimilarRFQ

VS-40L40CW-N3

Vishay General Semiconductor - Diodes DivisionIn Stock: 1004VS-40L40CW-N3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS40L40CT is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io) (per Diode): 20 A
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
• Mounting Type: Through Hole
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Package Considerations: Substitutes are grouped into two categories based on package format. Direct pin-compatible substitutes maintain the TO-220-3 package. Parametric equivalents may utilize alternative through-hole packages (TO-247-3) when electrical characteristics remain equivalent and mechanical mounting can be accommodated in the application.

Technology Variations: Schottky technology is the primary specification for the STPS40L40CT. Super Barrier (SBR) technology represents an alternative diode technology that meets all electrical parameter requirements while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (TO-220-3 Package):

MBR2040CT and SBR4040CT are direct mechanical and electrical substitutes for the STPS40L40CT. Both devices are manufactured by Diodes Incorporated and maintain active product status, ensuring long-term availability. Both parts satisfy all mandatory matching parameters and are ROHS3 compliant with MSL 1 rating.

MBR2040CT is a Schottky diode array that matches the forward voltage characteristic (530 mV @ 20 A) of the STPS40L40CT. This part exhibits lower reverse leakage current (100 µA @ 40 V) compared to the main part and provides an extended operating temperature range (-55°C ~ 150°C).

SBR4040CT employs Super Barrier technology and delivers identical forward voltage performance (530 mV @ 20 A) to the STPS40L40CT. This part demonstrates intermediate reverse leakage current (500 µA @ 40 V) and supports an extended lower temperature limit (-65°C ~ 150°C). The SBR4040CT is available in higher inventory quantity (15,697 pcs).

Parametric Equivalent (TO-247-3 Package):

VS-40L40CW-N3 is a parametric equivalent manufactured by Vishay General Semiconductor - Diodes Division. This part maintains identical electrical characteristics to the STPS40L40CT (530 mV @ 20 A forward voltage, fast recovery speed) and is ROHS3 compliant with MSL 1 rating. The device utilizes a TO-247-3 through-hole package, which requires mechanical accommodation in the application but provides equivalent electrical performance. This part is active and available (938 pcs in stock).

All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can MBR2040CT be used as a direct replacement for STPS40L40CT?

A: Yes. MBR2040CT is a direct pin-compatible substitute. Both devices are configured as 1 Pair Common Cathode diode arrays with 40 V reverse voltage rating, 20 A average rectified current, and TO-220-3 through-hole packaging. Both are ROHS3 compliant with MSL 1 rating. MBR2040CT is manufactured by Diodes Incorporated and maintains active product status.

Q: What is the difference between SBR4040CT and STPS40L40CT?

A: SBR4040CT uses Super Barrier diode technology, while STPS40L40CT uses Schottky technology. Both devices deliver identical forward voltage (530 mV @ 20 A), reverse voltage rating (40 V), and current rating (20 A). SBR4040CT exhibits lower reverse leakage current (500 µA @ 40 V versus 800 µA @ 40 V) and supports a lower operating temperature limit (-65°C versus no specified minimum). Both are pin-compatible in TO-220-3 packages.

Q: Why does MBR2040CT have a higher forward voltage (840 mV @ 20 A) than STPS40L40CT (530 mV @ 20 A)?

A: Forward voltage variation is a characteristic difference between diode technologies and manufacturing processes. While MBR2040CT exhibits higher forward voltage, it remains functionally equivalent for applications where the voltage drop is within acceptable design margins. MBR2040CT compensates with lower reverse leakage current (100 µA @ 40 V).

Q: Can VS-40L40CW-N3 be used in place of STPS40L40CT?

A: VS-40L40CW-N3 is a parametric electrical equivalent but uses a different package format (TO-247-3 versus TO-220-3). Electrical characteristics are identical (530 mV @ 20 A forward voltage, 40 V reverse voltage, 20 A current rating). Mechanical accommodation of the TO-247-3 package in the application is required. Both are ROHS3 compliant with MSL 1 rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. STPS40L40CT, MBR2040CT, SBR4040CT, and VS-40L40CW-N3 are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All parts are REACH unaffected.

Q: Which substitute part has the best availability?

A: SBR4040CT has the highest inventory level at 15,697 pcs in stock. MBR2040CT has 1,516 pcs available, and VS-40L40CW-N3 has 938 pcs available.

Q: What is the operating temperature range for each substitute?

A: STPS40L40CT specifies a maximum junction temperature of 150°C with no minimum specified. MBR2040CT operates from -55°C to 150°C. SBR4040CT operates from -65°C to 150°C. VS-40L40CW-N3 operates from -55°C to 150°C. All substitutes support the 150°C maximum of the original part.