40CPQ035 Equivalent & Substitute Parts

Part Overview

The 40CPQ035 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode rectifier with a maximum reverse voltage of 35 V and average rectified current of 20 A per diode. The device is packaged in a TO-247-3 through-hole configuration and operates across a junction temperature range of -55°C to 150°C.

This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs. Active alternatives are available that maintain core electrical specifications or provide enhanced performance characteristics within compatible package standards.

Substiute Parts

40CPQ035

Vishay General Semiconductor - Diodes DivisionIn Stock: 376240CPQ035 Datasheet

Current PartRFQ

MBR4035PT C0G

Taiwan Semiconductor CorporationIn Stock: 962MBR4035PT C0G Datasheet

MFR RecommendedRFQ

STPS4045CW

STMicroelectronicsIn Stock: 2016STPS4045CW Datasheet

MFR RecommendedRFQ

40CPQ035

SMC Diode SolutionsIn Stock: 376040CPQ035 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 40CPQ035 is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), technology (Schottky), package type (TO-247-3 through-hole), and electrical ratings including reverse voltage, average rectified current, forward voltage drop, and reverse leakage current.

Substitute parts are grouped into two categories:

Category 1: Manufacturer Recommended Substitutes – Parts that maintain or exceed the electrical specifications of the original component while offering active product status and improved compliance certifications.

Category 2: Parametric Equivalents – Parts that match the exact electrical specifications and configuration of the original component, differing primarily in manufacturer and compliance status.

The following parameters establish substitution validity:

• Diode Configuration: Must be 1 Pair Common Cathode
• Technology: Must be Schottky
• Package / Case: Must be TO-247-3
• Voltage - DC Reverse (Vr): Must be ≥ 35 V
• Current - Average Rectified (Io): Must be ≥ 20 A per diode
• Mounting Type: Must be Through Hole
• Speed: Must be Fast Recovery ≤ 500 ns, > 200 mA (Io)

Parameter Comparison

Engineering Selection Recommendations

MBR4035PT C0G (Taiwan Semiconductor Corporation) is the manufacturer-recommended primary substitute. This part maintains the 35 V reverse voltage specification and exceeds the current rating at 40 A per diode, providing design margin for applications requiring higher current capacity. The device is active in production status and ROHS3 compliant, addressing regulatory requirements. The higher forward voltage drop (800 mV @ 40 A) reflects operation at elevated current levels and does not impact substitution validity for the 20 A design point of the original component.

STPS4045CW (STMicroelectronics) is an alternative manufacturer-recommended substitute offering enhanced reverse voltage rating of 45 V while maintaining the 20 A current specification. This part is active in production and ROHS3 compliant. The elevated maximum junction temperature of 175°C provides extended thermal operating range compared to the original 150°C specification. The higher forward voltage drop (760 mV @ 20 A) and reduced reverse leakage current (200 µA @ 45 V) reflect the higher voltage rating design.

40CPQ035 (SMC Diode Solutions) is a parametric equivalent offering identical electrical specifications to the original Vishay component. This part is active in production status and ROHS3 compliant. The parametric equivalence ensures direct functional replacement with no design modifications required. REACH status differs from the original component, requiring compliance verification for specific applications.

Selection between these substitutes depends on application requirements: use MBR4035PT C0G for designs requiring higher current capacity; use STPS4045CW for applications requiring higher reverse voltage margin; use SMC Diode Solutions 40CPQ035 for direct parametric replacement with active product support.

Frequently Asked Questions (FAQ)

Q: Can the MBR4035PT C0G be used as a direct replacement for the 40CPQ035?

A: Yes. The MBR4035PT C0G maintains the same 35 V reverse voltage and 1 Pair Common Cathode configuration. The 40 A current rating exceeds the 20 A requirement of the original design, providing additional capacity. The TO-247-3 package is mechanically and electrically compatible. No circuit modifications are required.

Q: What is the difference between the STPS4045CW and the original 40CPQ035?

A: The STPS4045CW has a higher reverse voltage rating of 45 V compared to the 35 V of the 40CPQ035, and a maximum junction temperature of 175°C versus 150°C. Both maintain the 20 A current specification and 1 Pair Common Cathode configuration. The higher voltage rating provides additional design margin for transient overvoltage conditions. The TO-247-3 package is identical.

Q: Why does the MBR4035PT C0G have a higher forward voltage drop than the original part?

A: The forward voltage specification of 800 mV @ 40 A reflects measurement at the higher current rating of that device. At the 20 A operating point of the original design, the forward voltage would be lower. The specification provided is the maximum rating at the device's rated current, not the operating point of the original 40CPQ035.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute options (MBR4035PT C0G, STPS4045CW, and SMC Diode Solutions 40CPQ035) are ROHS3 compliant. The original Vishay 40CPQ035 is RoHS non-compliant, making substitution necessary for applications requiring RoHS compliance.

Q: Can the SMC Diode Solutions 40CPQ035 be used instead of the Vishay version?

A: Yes. The SMC Diode Solutions 40CPQ035 is a parametric equivalent with identical electrical specifications, configuration, and package type. The part is active in production and ROHS3 compliant. REACH status differs, requiring verification for specific regulatory requirements.

Q: What is the significance of the TO-247-3 package designation?

A: The TO-247-3 package is a three-lead through-hole configuration suitable for high-current applications. All substitute parts use this identical package, ensuring mechanical and thermal compatibility with existing PCB layouts and mounting hardware. No board redesign is required.

Q: Which substitute should be selected for thermal-constrained applications?

A: The STPS4045CW offers the highest maximum junction temperature at 175°C, compared to 150°C for the original and SMC equivalent. This provides additional thermal margin in applications operating near temperature limits. The MBR4035PT C0G and SMC equivalent maintain the original 150°C maximum.

Q: Are there any compliance differences between the substitute parts?

A: All substitutes are ROHS3 compliant and REACH unaffected. The SMC Diode Solutions 40CPQ035 has REACH Affected status, while the original Vishay part is REACH Unaffected. The MBR4035PT C0G and STPS4045CW are REACH Unaffected. Compliance verification is required for applications with specific regulatory requirements.