VS-12CTQ035PBF Equivalent & Substitute Parts

Part Overview

The VS-12CTQ035PBF 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 6 A average rectified current per diode. The device is packaged in a Through Hole TO-220-3 form factor and is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V
Current - Average Rectified (Io) (per Diode)	6 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 6 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	-55°C ~ 175°C
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the VS-12CTQ035PBF is determined by the following critical parameters: Diode Configuration (1 Pair Common Cathode), Technology (Schottky), Voltage - DC Reverse (35 V maximum), Current - Average Rectified (6 A per diode minimum), Mounting Type (Through Hole), and Package / Case (TO-220-3). Parts are grouped into three categories based on substitution relationship:

Direct Manufacturer Substitutes: Parts that maintain identical electrical specifications and diode configuration while differing in packaging or product status. These include VS-12CTQ035-M3 from Vishay.

Manufacturer Recommended Substitutes: Parts that meet or exceed the primary electrical parameters (voltage and current ratings) while maintaining the same diode configuration and package type. These include MBR1535CTG, MBR2035CT, MBR2535CTG, and MBR2535CTLG from onsemi and Solid State Inc., as well as STPS1545CT from STMicroelectronics.

Parametric Equivalents: Parts from alternative manufacturers that match the exact electrical specifications and configuration. The 12CTQ035 from SMC Diode Solutions represents this category.

Parameter Comparison

Part Number	Manufacturer	Diode Configuration	Voltage - DC Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max)	Operating Temperature - Junction	Product Status	Package / Case
VS-12CTQ035PBF	Vishay	1 Pair Common Cathode	35 V	6 A	600 mV @ 6 A	-55°C ~ 175°C	Discontinued	TO-220-3
VS-12CTQ035-M3	Vishay	1 Pair Common Cathode	35 V	6 A	730 mV @ 12 A	-55°C ~ 175°C	Active	TO-220-3
MBR1535CTG	onsemi	1 Pair Common Cathode	35 V	7.5 A	840 mV @ 15 A	-65°C ~ 175°C	Obsolete	TO-220-3
MBR2035CT	Solid State Inc.	2 Independent	35 V	20 A	Not Specified	Not Specified	Active	TO-220-3
MBR2535CTG	onsemi	1 Pair Common Cathode	35 V	30 A	820 mV @ 30 A	-65°C ~ 175°C	Active	TO-220-3
MBR2535CTLG	onsemi	1 Pair Common Cathode	35 V	12.5 A	470 mV @ 12.5 A	-65°C ~ 150°C	Active	TO-220-3
STPS1545CT	STMicroelectronics	1 Pair Common Cathode	45 V	7.5 A	570 mV @ 7.5 A	-55°C ~ 175°C	Active	TO-220-3
12CTQ035	SMC Diode Solutions	1 Pair Common Cathode	35 V	6 A	600 mV @ 6 A	-55°C ~ 175°C	Active	TO-220-3

Engineering Selection Recommendations

VS-12CTQ035-M3 (Vishay): This direct substitute from the original manufacturer is the primary choice for replacement. It maintains identical electrical specifications and diode configuration while offering Active product status. The component is available in Tube packaging with 738 pieces in stock.

12CTQ035 (SMC Diode Solutions): This parametric equivalent provides identical electrical performance to the original VS-12CTQ035PBF with exact matching of voltage, current, and forward voltage specifications. The part is Active and available in high volume (6550 pieces in stock). REACH Status is listed as Affected, requiring verification for specific applications.

MBR2535CTLG (onsemi): This substitute provides higher current capability (12.5 A versus 6 A) while maintaining the 35 V voltage rating and 1 Pair Common Cathode configuration. The part is Active with ROHS3 compliance and REACH Unaffected status. Forward voltage is lower at 470 mV @ 12.5 A, indicating improved efficiency characteristics.

MBR2535CTG (onsemi): This option offers the highest current rating (30 A) within the 35 V voltage class and 1 Pair Common Cathode configuration. It is Active and ROHS3 compliant with REACH Unaffected status. This part is suitable for applications requiring higher current capacity than the original specification.

STPS1545CT (STMicroelectronics): This substitute provides a higher voltage rating (45 V versus 35 V) while maintaining 7.5 A current capability and 1 Pair Common Cathode configuration. The part is Active and suitable for applications requiring voltage margin above the original 35 V specification.

MBR1535CTG (onsemi): This part is classified as Obsolete and should not be selected for new designs despite meeting electrical parameters.

MBR2035CT (Solid State Inc.): This part features a 2 Independent diode configuration, which differs from the original 1 Pair Common Cathode configuration. Selection of this part requires circuit redesign and is not recommended as a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can VS-12CTQ035-M3 be used as a direct replacement for VS-12CTQ035PBF?

A: Yes. VS-12CTQ035-M3 is a direct substitute from Vishay with identical diode configuration (1 Pair Common Cathode), voltage rating (35 V), and current rating (6 A per diode). The primary difference is product status (Active versus Discontinued) and packaging format (Tube). Both components are ROHS3 compliant and operate across the same temperature range.

Q: What is the difference between 1 Pair Common Cathode and 2 Independent diode configurations?

A: A 1 Pair Common Cathode configuration contains two diodes sharing a common cathode terminal, resulting in three external connections. A 2 Independent configuration contains two separate diodes with independent cathodes, requiring four external connections. These configurations are not interchangeable without circuit modification.

Q: Can MBR2535CTLG replace VS-12CTQ035PBF in all applications?

A: MBR2535CTLG maintains the same 35 V voltage rating and 1 Pair Common Cathode configuration as the original part. However, it provides higher current capability (12.5 A versus 6 A per diode) and lower forward voltage (470 mV @ 12.5 A versus 600 mV @ 6 A). These characteristics make it suitable for applications where the original part's current rating is insufficient or where lower forward voltage loss is beneficial. The operating temperature range is -65°C ~ 150°C, which is narrower at the upper limit than the original -55°C ~ 175°C.

Q: Is STPS1545CT compatible with circuits designed for VS-12CTQ035PBF?

A: STPS1545CT maintains the same diode configuration (1 Pair Common Cathode) and package type (TO-220-3) as the original part. However, it features a higher voltage rating (45 V versus 35 V) and higher current capability (7.5 A versus 6 A). The higher voltage rating provides additional margin for transient protection. Forward voltage is lower at 570 mV @ 7.5 A. This part is suitable for applications where the original specification is met and additional voltage margin is desired.

Q: What is the significance of the 12CTQ035 base product number appearing in multiple manufacturers' part numbers?

A: The 12CTQ035 base product number indicates a standardized diode array specification across multiple manufacturers. Vishay's VS-12CTQ035PBF, Vishay's VS-12CTQ035-M3, and SMC Diode Solutions' 12CTQ035 all share this base designation, indicating they meet the same core electrical specifications: 1 Pair Common Cathode configuration, 35 V voltage rating, and 6 A current rating. This standardization facilitates cross-manufacturer substitution.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. However, the 12CTQ035 from SMC Diode Solutions has REACH Status listed as Affected, while other substitutes have REACH Unaffected status. Verification of REACH compliance requirements is necessary for specific applications and end-use markets.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tube (VS-12CTQ035-M3, MBR2535CTG, MBR2535CTLG, STPS1545CT, 12CTQ035), Bulk (MBR2035CT), and unspecified packaging (MBR1535CTG). All parts maintain the Through Hole TO-220-3 package / case format for mechanical compatibility.

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