Equivalent & Substitute Parts for 40CPQ050

Part Overview

The 40CPQ050 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode arrangement rated for 50 V DC reverse voltage and 20 A average rectified current per diode. This component is packaged in a TO-247-3 through-hole configuration and is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production and repair applications.

Substiute Parts

40CPQ050

Vishay General Semiconductor - Diodes DivisionIn Stock: 134540CPQ050 Datasheet

Current PartRFQ

STPS4045CWY

STMicroelectronicsIn Stock: 3448STPS4045CWY Datasheet

MFR RecommendedRFQ

STPS40L45CW

STMicroelectronicsIn Stock: 2345STPS40L45CW Datasheet

MFR RecommendedRFQ

40CPQ050

SMC Diode SolutionsIn Stock: 142840CPQ050 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 40CPQ050 is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), technology (Schottky), current rating (20 A per diode), mounting type (Through Hole), and package type (TO-247-3). The substitute parts are grouped into two categories based on voltage rating compatibility:

MFR Recommended Substitutes (45 V Rating): STPS4045CWY and STPS40L45CW from STMicroelectronics operate at 45 V DC reverse voltage, which is lower than the original 50 V specification. These parts maintain the same 20 A current rating, Schottky technology, fast recovery speed, and TO-247-3 package configuration.

Parametric Equivalent (50 V Rating): The 40CPQ050 from SMC Diode Solutions matches the original 50 V voltage specification, 20 A current rating, Schottky technology, fast recovery speed, and TO-247-3 package. This part provides direct parametric equivalence with identical electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Parametric Replacement: The 40CPQ050 from SMC Diode Solutions is the appropriate selection when exact electrical specifications must be maintained. This part provides identical voltage rating (50 V), current rating (20 A), forward voltage drop (530 mV @ 20 A), and operating temperature range (-55°C ~ 150°C). The part is currently in active production status with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

For Voltage-Reduced Applications: The STPS40L45CW from STMicroelectronics is suitable for applications where the 45 V voltage rating is acceptable. This part matches the original forward voltage specification (530 mV @ 20 A) and maintains all other electrical characteristics. It offers ROHS3 compliance and active product status.

For Automotive-Qualified Applications: The STPS4045CWY from STMicroelectronics is qualified to AEC-Q101 automotive standards and carries active product status with ROHS3 compliance. This part operates at 45 V with a higher forward voltage drop (760 mV @ 20 A) and an extended maximum operating temperature of 175°C. Selection of this part is appropriate for automotive applications requiring formal qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can the STPS4045CWY or STPS40L45CW be used as direct replacements for the 40CPQ050?

A: Both STMicroelectronics parts operate at 45 V, which is lower than the original 50 V specification. These parts are suitable for applications where the circuit voltage does not exceed 45 V. The STPS40L45CW maintains identical forward voltage characteristics (530 mV @ 20 A), while the STPS4045CWY exhibits higher forward voltage (760 mV @ 20 A).

Q: What is the primary difference between STPS4045CWY and STPS40L45CW?

A: Both parts share the same 45 V voltage rating and 20 A current rating. The STPS4045CWY has a forward voltage of 760 mV @ 20 A and includes AEC-Q101 automotive qualification. The STPS40L45CW has a forward voltage of 530 mV @ 20 A, matching the original part specification. The STPS40L45CW also specifies a maximum junction temperature of 150°C, while the STPS4045CWY operates to 175°C.

Q: Are all substitute parts compatible with the TO-247-3 package footprint?

A: Yes. All substitute parts listed use the TO-247-3 through-hole package configuration, ensuring mechanical and electrical compatibility with existing PCB designs and socket configurations.

Q: What is the compliance status of the substitute parts?

A: The 40CPQ050 from SMC Diode Solutions, STPS4045CWY, and STPS40L45CW are all ROHS3 compliant. The original Vishay 40CPQ050 is RoHS non-compliant. All parts are REACH Unaffected or REACH Affected as specified.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring 50 V operation, the 40CPQ050 from SMC Diode Solutions provides parametric equivalence with active product status and ROHS3 compliance. For designs tolerating 45 V operation, either STMicroelectronics part is acceptable based on thermal and forward voltage requirements.