Equivalent & Substitute Parts for 12CTQ035 Schottky Diode Array

Part Overview

The 12CTQ035 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode arrangement in a TO-220-3 through-hole package. This component is rated for 35 V DC reverse voltage and 6 A average rectified current per diode, with a maximum forward voltage of 600 mV at 6 A. The part is currently listed as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

12CTQ035

Vishay General Semiconductor - Diodes DivisionIn Stock: 663112CTQ035 Datasheet

Current PartRFQ

MBR2535CTLG

onsemiIn Stock: 1827MBR2535CTLG Datasheet

MFR RecommendedRFQ

STPS1545CT

STMicroelectronicsIn Stock: 1235STPS1545CT Datasheet

MFR RecommendedRFQ

12CTQ035

SMC Diode SolutionsIn Stock: 656812CTQ035 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 12CTQ035 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Diode Configuration: 1 Pair Common Cathode (must match exactly)
• Technology: Schottky (must match exactly)
• Voltage - DC Reverse (Vr) (Max): 35 V minimum (equal or higher acceptable)
• Current - Average Rectified (Io) (per Diode): 6 A minimum (equal or higher acceptable)
• Mounting Type: Through Hole (must match exactly)
• Package / Case: TO-220-3 (must match exactly)
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (must match exactly)

Substitute parts are classified into two categories:

Manufacturer Recommended Substitutes: Parts that exceed the minimum electrical specifications while maintaining identical package and configuration requirements.

Parametric Equivalents: Parts that match all electrical and mechanical specifications exactly, with variations only in manufacturer, product status, or compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalent):

The 12CTQ035 manufactured by SMC Diode Solutions provides an exact parametric match to the original Vishay component. This part maintains identical electrical specifications (35 V, 6 A, 600 mV forward voltage) and operating temperature range (-55°C ~ 175°C). The primary advantage of this equivalent is its active product status and ROHS3 compliance, addressing the obsolescence of the original Vishay part while preserving all electrical and thermal characteristics.

For Enhanced Performance Substitution:

The MBR2535CTLG from onsemi offers increased current capacity (12.5 A versus 6 A) while maintaining the 35 V voltage rating. This part delivers improved forward voltage characteristics (470 mV @ 12.5 A) and lower reverse leakage current (5 mA @ 35 V). The MBR2535CTLG is suitable for applications requiring higher current handling or improved efficiency. This part carries ROHS3 compliance and active product status.

The STPS1545CT from STMicroelectronics provides elevated voltage rating (45 V versus 35 V) with increased current capacity (7.5 A versus 6 A). This part is applicable in designs requiring higher voltage margins or increased current capability. The STPS1545CT carries ROHS3 compliance and active product status.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant, addressing regulatory requirements that the original Vishay 12CTQ035 does not meet. Selection should account for design voltage and current requirements, thermal management capabilities, and any specific performance criteria related to forward voltage drop or reverse leakage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the MBR2535CTLG be used as a direct replacement for the 12CTQ035?

A: The MBR2535CTLG is electrically compatible for applications operating at or below 35 V and 6 A. The higher current rating (12.5 A) and improved forward voltage characteristics (470 mV @ 12.5 A) make it suitable for direct substitution. However, the lower maximum junction temperature (150°C versus 175°C) must be verified against thermal design requirements.

Q: What is the primary difference between the MBR2535CTLG and STPS1545CT?

A: The MBR2535CTLG maintains the 35 V voltage rating with 12.5 A current capacity, while the STPS1545CT increases the voltage rating to 45 V with 7.5 A current capacity. Selection depends on whether the application requires higher current handling (MBR2535CTLG) or higher voltage margin (STPS1545CT).

Q: Is the SMC Diode Solutions 12CTQ035 identical to the original Vishay part?

A: The SMC Diode Solutions 12CTQ035 matches all electrical specifications and operating temperature range of the original Vishay component. The primary differences are manufacturer identity, active product status, and ROHS3 compliance. Package designation varies slightly (TO-220AB versus TO-220-3), but both are TO-220-3 physical packages.

Q: Are all substitute parts available in the same TO-220-3 package?

A: All substitute parts listed are housed in TO-220-3 through-hole packages, ensuring mechanical compatibility with the original 12CTQ035 design. Pin configuration and mounting requirements remain identical across all listed alternatives.

Q: What compliance certifications apply to the substitute parts?

A: The MBR2535CTLG, STPS1545CT, and SMC Diode Solutions 12CTQ035 all carry ROHS3 compliance. All parts are REACH Unaffected or REACH Affected (SMC variant) and classified under ECCN EAR99. The original Vishay 12CTQ035 is RoHS non-compliant.

Q: Can the STPS1545CT be used in a 35 V application?

A: The STPS1545CT is rated for 45 V maximum reverse voltage, making it suitable for 35 V applications. The higher voltage rating provides additional design margin without affecting performance in lower voltage circuits.

Q: What is the significance of the 1 Pair Common Cathode configuration?

A: The 1 Pair Common Cathode configuration indicates two independent diodes sharing a common cathode connection within a single package. All substitute parts maintain this identical configuration, ensuring pin-for-pin compatibility and functional equivalence.