STPS4045CP Equivalent & Substitute Parts

Part Overview

The STPS4045CP is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 45 V reverse voltage rating and 20 A average rectified current per diode. The device is packaged in TO-218-3 (SOT-93) through-hole configuration and is classified as obsolete. Due to its obsolete status, equivalent substitute parts with identical or superior electrical characteristics are available from STMicroelectronics and Vishay General Semiconductor to maintain design continuity and ensure supply chain availability.

Substiute Parts

STPS4045CP

STMicroelectronicsIn Stock: 2273STPS4045CP Datasheet

Current PartRFQ

STPS4045CW

STMicroelectronicsIn Stock: 2016STPS4045CW Datasheet

Parametric EquivalentRFQ

STPS4045CWY

STMicroelectronicsIn Stock: 3448STPS4045CWY Datasheet

Parametric EquivalentRFQ

VS-20CTQ045-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 8576VS-20CTQ045-M3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS4045CP is determined by the following critical parameters that must remain constant across all equivalent parts:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 45 V
• Current - Average Rectified (Io) (per Diode): 20 A
• Voltage - Forward (Vf) (Max) @ If: 760 mV @ 20 A
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
• Operating Temperature - Junction (Max): 175°C
• Mounting Type: Through Hole
• RoHS Status: ROHS3 Compliant

All substitute parts listed maintain these electrical and functional specifications. Differences in package type (TO-218-3, TO-247-3, TO-220-3) represent mechanical variations that do not affect electrical performance but require physical board layout accommodation. The STPS4045CW and STPS4045CWY are direct STMicroelectronics alternatives with active product status. The VS-20CTQ045-M3 is a Vishay equivalent offering extended operating temperature range and automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

STPS4045CW and STPS4045CWY: Both parts are manufactured by STMicroelectronics with active product status, ensuring long-term availability and supply chain stability. These devices are direct functional equivalents to the STPS4045CP with identical electrical specifications. The STPS4045CWY variant includes AEC-Q101 automotive qualification and extended operating temperature range (-40°C to 175°C), making it suitable for automotive and industrial applications requiring temperature robustness. The STPS4045CW provides standard industrial-grade performance. Both are packaged in TO-247-3, requiring board layout modification from the original TO-218-3 package.

VS-20CTQ045-M3: The Vishay General Semiconductor equivalent offers the widest operating temperature range (-55°C to 175°C) and is suitable for extreme environment applications. This part exhibits higher reverse leakage current (2 mA @ 45 V compared to 200 µA @ 45 V in the STPS4045CP), which may impact applications with stringent leakage specifications. The TO-220-3 package differs from both STMicroelectronics alternatives, requiring distinct board layout considerations.

Selection between substitute parts depends on application requirements: STMicroelectronics variants for standard industrial use with active product support, STPS4045CWY for automotive applications, and VS-20CTQ045-M3 for extended temperature range requirements.

Frequently Asked Questions (FAQ)

Q: Can STPS4045CW directly replace STPS4045CP without circuit modification?

A: The STPS4045CW is electrically equivalent to STPS4045CP with identical voltage, current, and thermal specifications. However, the package differs (TO-247-3 versus TO-218-3), requiring physical board layout modification to accommodate the different pin configuration and thermal footprint.

Q: What is the difference between STPS4045CW and STPS4045CWY?

A: Both parts are electrically identical with 45 V reverse voltage and 20 A current rating. The STPS4045CWY includes AEC-Q101 automotive qualification and specifies operating temperature range from -40°C to 175°C, whereas STPS4045CW specifies maximum junction temperature of 175°C without explicit minimum temperature rating. STPS4045CWY is recommended for automotive and temperature-critical applications.

Q: Why does VS-20CTQ045-M3 show higher reverse leakage current?

A: The VS-20CTQ045-M3 exhibits 2 mA reverse leakage at 45 V compared to 200 µA in the STPS4045CP. This difference is within normal manufacturing variation for Schottky diodes across different manufacturers. Applications sensitive to leakage current should evaluate this parameter against circuit requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts (STPS4045CW, STPS4045CWY, and VS-20CTQ045-M3) are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the original STPS4045CP.

Q: Which substitute part has the best long-term availability?

A: STPS4045CW and STPS4045CWY both carry active product status from STMicroelectronics, ensuring continued manufacturing and supply chain support. The STPS4045CP is classified as obsolete and should be replaced with one of these active alternatives for new designs or long-term production requirements.

Q: Can I use VS-20CTQ045-M3 in place of STPS4045CP in a temperature-sensitive application?

A: Yes, the VS-20CTQ045-M3 provides extended operating temperature range (-55°C to 175°C) and is suitable for temperature-sensitive applications. The higher reverse leakage current (2 mA versus 200 µA) should be evaluated against circuit specifications to ensure compatibility.

Q: What are the thermal package differences between the three substitute options?

A: STPS4045CW and STPS4045CWY use TO-247-3 packaging, while VS-20CTQ045-M3 uses TO-220-3 packaging. Both packages are through-hole mounted but have different pin layouts and thermal dissipation characteristics. Board layout and heatsinking requirements must be reassessed for each package type.