VS-40CPQ035PBF Equivalent & Substitute Parts

Part Overview

The VS-40CPQ035PBF is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 35 V DC reverse voltage and 20 A average rectified current per diode in a Through Hole TO-247-3 package. The part is currently classified as Obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	VS-40CPQ035PBF
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V
Current - Average Rectified (Io) (per Diode)	20 A
Voltage - Forward (Vf) (Max) @ If	490 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	4 mA @ 35 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-247-3
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the VS-40CPQ035PBF is determined by the following critical parameters:

Electrical Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 35 V minimum
Current - Average Rectified (Io) (per Diode): 20 A minimum
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Criteria:

Mounting Type: Through Hole
Package / Case: TO-247-3

Compliance Criteria:

RoHS Status: ROHS3 Compliant

Substitute parts are grouped into three categories based on their relationship to the main part specifications:

Direct Manufacturer Variant: Parts from the same manufacturer with identical base product numbers but enhanced current ratings or packaging variations.

Manufacturer Recommended Equivalent: Parts from alternative manufacturers that meet or exceed the electrical specifications with different voltage or current ratings.

Parametric Equivalent: Parts from alternative manufacturers with identical electrical and mechanical specifications.

Parameter Comparison

Parameter	VS-40CPQ035PBF (Main)	VS-40CPQ035-N3	STPS4045CW	40CPQ035 (SMC)
Manufacturer	Vishay	Vishay	STMicroelectronics	SMC Diode Solutions
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	45 V	35 V
Current - Average Rectified (Io) (per Diode)	20 A	40 A	20 A	20 A
Voltage - Forward (Vf) (Max) @ If	490 mV @ 20 A	590 mV @ 40 A	760 mV @ 20 A	490 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	4 mA @ 35 V	4 mA @ 35 V	200 µA @ 45 V	4 mA @ 35 V
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	175°C (Max)	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-247-3	TO-247-3	TO-247-3
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

VS-40CPQ035-N3 (Vishay Direct Variant)

This part is a direct manufacturer variant from Vishay with Active product status. It maintains identical voltage and temperature specifications while providing doubled current capacity at 40 A per diode. The forward voltage increases to 590 mV at the higher 40 A rating. This component is suitable for applications requiring higher current handling within the same 35 V voltage class. ROHS3 compliance is maintained.

STPS4045CW (STMicroelectronics Manufacturer Recommended)

This part is an alternative manufacturer equivalent with Active product status. It provides elevated voltage rating of 45 V while maintaining the 20 A current specification of the original part. Forward voltage is higher at 760 mV @ 20 A, and reverse leakage is lower at 200 µA @ 45 V. Maximum junction temperature extends to 175°C. This component is suitable for applications requiring higher voltage margin within similar current specifications. ROHS3 compliance is maintained.

40CPQ035 (SMC Diode Solutions Parametric Equivalent)

This part is a parametric equivalent from SMC Diode Solutions with Active product status. It provides identical electrical specifications to the main part: 35 V voltage rating, 20 A current, and 490 mV forward voltage. The component maintains all thermal and speed characteristics. ROHS3 compliance is maintained. REACH Status is listed as Affected for this variant.

Frequently Asked Questions (FAQ)

Q: Can VS-40CPQ035-N3 be used as a direct replacement for VS-40CPQ035PBF?

A: VS-40CPQ035-N3 is electrically compatible as a substitute. Both components share identical voltage ratings (35 V), configuration (1 Pair Common Cathode), technology (Schottky), and package (TO-247-3). The primary difference is the current rating: VS-40CPQ035-N3 is rated for 40 A per diode compared to 20 A for the original part. This higher current capacity does not prevent substitution in applications designed for 20 A operation. Forward voltage increases to 590 mV at the higher current rating.

Q: What are the key differences between STPS4045CW and the original VS-40CPQ035PBF?

A: STPS4045CW differs in three primary parameters: (1) Voltage rating is 45 V versus 35 V, providing higher voltage margin; (2) Forward voltage is 760 mV @ 20 A versus 490 mV, resulting in higher power dissipation; (3) Reverse leakage is 200 µA @ 45 V versus 4 mA @ 35 V. All other parameters including current rating (20 A), configuration, technology, package, and speed characteristics remain compatible.

Q: Are all substitute parts available in the same TO-247-3 package?

A: All substitute parts use the TO-247-3 package. However, packaging variants differ: VS-40CPQ035PBF uses unspecified packaging, VS-40CPQ035-N3 uses Tube packaging, STPS4045CW uses Tube packaging, and 40CPQ035 uses Tube packaging with TO-247AD supplier device package designation. These packaging differences do not affect electrical or mechanical compatibility.

Q: Which substitute part is most suitable for direct replacement in existing designs?

A: The 40CPQ035 from SMC Diode Solutions provides the closest parametric match with identical electrical specifications (35 V, 20 A, 490 mV forward voltage) and identical operating temperature range (-55°C ~ 150°C). This component requires no design modifications for substitution.

Q: What is the compliance status of each substitute part?

A: All substitute parts maintain ROHS3 compliance. VS-40CPQ035-N3 and STPS4045CW have REACH Status listed as REACH Unaffected. The 40CPQ035 from SMC Diode Solutions has REACH Status listed as REACH Affected. All parts carry EAR99 ECCN classification.

Q: Can STPS4045CW be used in applications where higher voltage margin is required?

A: STPS4045CW provides 45 V voltage rating compared to the original 35 V specification. This component is suitable for applications requiring higher voltage headroom. However, the increased forward voltage (760 mV versus 490 mV) results in higher power dissipation and thermal considerations must be evaluated for the specific application.

Q: What inventory levels are available for each substitute part?

A: VS-40CPQ035-N3 has 2200 pieces in stock, STPS4045CW has 1990 pieces in stock, and 40CPQ035 has 3736 pieces in stock. All parts are listed as New Original In Stock.

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