VS-40L40CW-N3 Equivalent & Substitute Parts

Part Overview

The VS-40L40CW-N3 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 40 V DC reverse voltage and 20 A average rectified current per diode. The device is packaged in a Through Hole TO-247-3 case and is classified as Active product status. Substitute parts are identified to address inventory availability, extended temperature range requirements, or automotive qualification needs while maintaining electrical and mechanical compatibility.

Substiute Parts

VS-40L40CW-N3

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

Current PartRFQ

STPS4045CWY

STMicroelectronicsIn Stock: 3448STPS4045CWY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VS-40L40CW-N3 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Diode Configuration: 1 Pair Common Cathode (pinout compatibility)
• Technology: Schottky (switching characteristics and forward voltage behavior)
• Current Rating: 20 A average rectified current per diode (thermal and current handling)
• Package / Case: TO-247-3 (mechanical fit and thermal interface)
• Mounting Type: Through Hole (PCB assembly compatibility)

Acceptable Variation Parameters:

• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 40 V (higher voltage rating is acceptable)
• Operating Temperature - Junction: Equal to or greater than the specified range (extended range is acceptable)
• Forward Voltage (Vf): Variation acceptable within circuit design margins
• Reverse Leakage Current: Variation acceptable within circuit design margins

The STPS4045CWY meets all substitution criteria with a higher voltage rating (45 V) and extended temperature range (-40°C ~ 175°C), making it a direct electrical and mechanical substitute.

Parameter Comparison

Engineering Selection Recommendations

The STPS4045CWY is a qualified substitute for the VS-40L40CW-N3 based on the following engineering criteria:

Electrical Compatibility: The STPS4045CWY maintains identical diode configuration (1 Pair Common Cathode), technology (Schottky), current rating (20 A per diode), and switching speed (Fast Recovery ≤ 500 ns). The higher voltage rating (45 V versus 40 V) provides additional design margin and is acceptable for applications rated at 40 V or lower.

Mechanical Compatibility: Both components use identical Through Hole mounting and TO-247-3 packaging, ensuring direct PCB footprint compatibility without layout modifications.

Compliance and Certification: Both parts are ROHS3 Compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. The STPS4045CWY includes AEC-Q101 automotive qualification, making it suitable for automotive and industrial applications requiring enhanced reliability standards.

Temperature Range: The STPS4045CWY extends the operating temperature range to -40°C ~ 175°C, compared to the VS-40L40CW-N3 range of -55°C ~ 150°C. This provides higher maximum junction temperature capability for high-temperature applications.

Product Status: Both components maintain Active product status, ensuring continued availability and support.

Frequently Asked Questions (FAQ)

Q: Can the STPS4045CWY be used as a direct replacement for the VS-40L40CW-N3 in existing designs?

A: Yes. The STPS4045CWY is electrically and mechanically compatible. Both components share identical diode configuration, current rating, package type, and mounting method. The higher voltage rating (45 V) and extended temperature range of the STPS4045CWY provide additional design margin.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Manufacturer (Vishay versus STMicroelectronics), (2) Voltage rating (40 V versus 45 V), (3) Forward voltage at 20 A (530 mV versus 760 mV), (4) Reverse leakage current (1.5 mA @ 40 V versus 200 µA @ 45 V), (5) Operating temperature range (-55°C ~ 150°C versus -40°C ~ 175°C), and (6) Automotive qualification (STPS4045CWY includes AEC-Q101).

Q: Will the higher forward voltage of the STPS4045CWY affect circuit performance?

A: The STPS4045CWY exhibits 230 mV higher forward voltage at 20 A (760 mV versus 530 mV). Circuit designers must evaluate whether this difference impacts power dissipation, voltage drop requirements, or thermal management in their specific application.

Q: Are both parts suitable for automotive applications?

A: The STPS4045CWY carries AEC-Q101 automotive qualification. The VS-40L40CW-N3 does not specify automotive qualification. For automotive applications, the STPS4045CWY is the appropriate selection.

Q: Do these parts require different PCB footprints?

A: No. Both components use identical TO-247-3 packaging and Through Hole mounting, requiring no PCB layout modifications for substitution.

Q: What is the inventory status of these parts?

A: The VS-40L40CW-N3 has 938 pieces in stock. The STPS4045CWY has 3400 pieces in stock, providing greater availability.

Q: Are both parts RoHS compliant?

A: Yes. Both the VS-40L40CW-N3 and STPS4045CWY are ROHS3 Compliant and REACH Unaffected.