40CPQ080 Equivalent & Substitute Parts

Part Overview

The 40CPQ080 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 80 V DC reverse voltage and 20 A average rectified current per diode. The device is packaged in a TO-247-3 through-hole format and operates across a junction temperature range of -55°C to 175°C.

The 40CPQ080 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode array.

Substiute Parts

40CPQ080

Vishay General Semiconductor - Diodes DivisionIn Stock: 183140CPQ080 Datasheet

Current PartRFQ

STPS40H100CW

STMicroelectronicsIn Stock: 2969STPS40H100CW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 40CPQ080 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Diode configuration must be 1 Pair Common Cathode
• Technology must be Schottky
• DC reverse voltage rating must equal or exceed 80 V
• Average rectified current per diode must equal or exceed 20 A
• Fast recovery speed characteristic (≤ 500 ns, > 200 mA)
• Operating temperature range must encompass -55°C to 175°C

Mechanical Compatibility Requirements:

• Mounting type must be Through Hole
• Package must be TO-247-3

The STPS40H100CW from STMicroelectronics meets all substitution criteria. This part maintains identical diode configuration, technology, current rating, and package format while providing enhanced voltage rating (100 V versus 80 V) and improved reverse leakage characteristics.

Parameter Comparison

Engineering Selection Recommendations

The STPS40H100CW is a direct functional substitute for the 40CPQ080 in applications requiring Schottky diode array performance within the specified electrical and thermal parameters.

Product Status Consideration: The 40CPQ080 is obsolete, while the STPS40H100CW is active. Selection of the active part ensures long-term supply availability and manufacturing support.

Compliance Advantage: The STPS40H100CW is ROHS3 compliant, whereas the 40CPQ080 is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulatory requirements.

Electrical Performance: The STPS40H100CW provides a higher DC reverse voltage rating (100 V versus 80 V), offering enhanced voltage margin for the same current capacity. Forward voltage drop is lower (730 mV versus 770 mV at 20 A), resulting in reduced power dissipation. Reverse leakage current is substantially lower (10 µA at 100 V versus 1.25 mA at 80 V), indicating improved device quality and reduced standby power consumption.

Mechanical and Thermal Compatibility: Both parts share identical TO-247-3 packaging and through-hole mounting characteristics. Maximum junction temperature ratings are equivalent at 175°C.

Frequently Asked Questions (FAQ)

Q: Can the STPS40H100CW directly replace the 40CPQ080 in existing PCB designs?

A: Yes. Both parts feature identical TO-247-3 through-hole packaging and pin configuration. No PCB layout modifications are required. The electrical parameters of the STPS40H100CW are compatible with applications designed for the 40CPQ080.

Q: What is the significance of the higher voltage rating on the STPS40H100CW?

A: The STPS40H100CW is rated for 100 V DC reverse voltage compared to 80 V on the 40CPQ080. This higher rating provides additional voltage margin and allows the part to operate safely in applications with transient overvoltage conditions. The part remains fully functional in circuits designed for 80 V operation.

Q: How does the lower forward voltage drop of the STPS40H100CW affect circuit performance?

A: The STPS40H100CW exhibits a forward voltage drop of 730 mV at 20 A, compared to 770 mV for the 40CPQ080. This 40 mV reduction decreases power dissipation in the diode, resulting in lower heat generation and improved overall circuit efficiency.

Q: What does the substantially lower reverse leakage current on the STPS40H100CW indicate?

A: The STPS40H100CW exhibits reverse leakage of 10 µA at 100 V, compared to 1.25 mA at 80 V for the 40CPQ080. Lower reverse leakage indicates superior device quality, reduced standby power consumption, and improved long-term reliability characteristics.

Q: Is the STPS40H100CW suitable for applications requiring RoHS compliance?

A: Yes. The STPS40H100CW is ROHS3 compliant. The 40CPQ080 is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the STPS40H100CW is the appropriate selection.

Q: Are there any thermal considerations when substituting the STPS40H100CW for the 40CPQ080?

A: Both parts are rated for identical maximum junction temperatures of 175°C and share the same TO-247-3 package. Thermal management requirements remain equivalent between the two parts.

Q: What is the current availability status of these parts?

A: The 40CPQ080 is classified as obsolete. The STPS40H100CW is active and currently in production, with established supply chain availability.