Equivalent & Substitute Parts for 30CTQ035 Schottky Diode Array

Part Overview

The 30CTQ035 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode arrangement rated for 35 V DC reverse voltage and 15 A average rectified current per diode. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The part is packaged in TO-220-3 through-hole configuration and features fast recovery characteristics suitable for switching applications.

Substiute Parts

30CTQ035

Vishay General Semiconductor - Diodes DivisionIn Stock: 166930CTQ035 Datasheet

Current PartRFQ

MBR2535CTG

onsemiIn Stock: 2049MBR2535CTG Datasheet

MFR RecommendedRFQ

STPS3045CT

STMicroelectronicsIn Stock: 38456STPS3045CT Datasheet

MFR RecommendedRFQ

30CTQ035

SMC Diode SolutionsIn Stock: 168430CTQ035 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 30CTQ035 is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), technology (Schottky), package type (TO-220-3 through-hole), and electrical ratings (voltage and current specifications). Substitute parts are grouped into two categories based on their relationship to the original specification:

Manufacturer Recommended Substitutes meet or exceed the original electrical specifications while offering active product status and improved compliance certifications. These parts maintain the same diode configuration and package form factor, ensuring direct functional replacement in circuit designs.

Parametric Equivalents provide identical electrical performance to the original part with enhanced compliance status. These parts are selected based on matching voltage rating, current rating, forward voltage characteristics, and thermal operating range.

The key parameters governing substitution eligibility are:

• Diode Configuration: 1 Pair Common Cathode (mandatory match)
• Technology: Schottky (mandatory match)
• Package / Case: TO-220-3 (mandatory match)
• Voltage - DC Reverse (Vr) (Max): ≥ 35 V (equal or higher acceptable)
• Current - Average Rectified (Io): ≥ 15 A (equal or higher acceptable)
• Mounting Type: Through Hole (mandatory match)

Parameter Comparison

Engineering Selection Recommendations

MBR2535CTG (onsemi SWITCHMODE™ Series) is a manufacturer-recommended substitute offering doubled current capacity (30 A versus 15 A) while maintaining the 35 V voltage rating. This part is active in production status and ROHS3 compliant. The increased current rating provides design margin for applications requiring higher current handling. Forward voltage at rated current is higher (820 mV @ 30 A) compared to the original specification. Reverse leakage current is significantly lower (200 µA @ 35 V versus 2 mA @ 35 V), indicating improved device quality. Operating temperature range extends to -65°C minimum, providing broader thermal coverage.

STPS3045CT (STMicroelectronics) is a manufacturer-recommended substitute with elevated voltage rating (45 V versus 35 V) while maintaining the original 15 A current specification. This part is active in production status and ROHS3 compliant. The higher voltage rating accommodates applications with increased reverse voltage margins. Forward voltage is lower (570 mV @ 15 A) compared to the original specification, resulting in reduced power dissipation. Reverse leakage current is lower (200 µA @ 45 V). Maximum junction temperature is specified at 200°C, providing enhanced thermal performance.

30CTQ035 (SMC Diode Solutions) is a parametric equivalent providing identical electrical specifications to the original Vishay part (35 V, 15 A, 620 mV forward voltage). This part is active in production status and ROHS3 compliant. Reverse leakage current is slightly lower (1 mA @ 35 V versus 2 mA @ 35 V). This option provides direct functional equivalence with improved compliance status and active availability.

Selection between these substitutes depends on application requirements: use MBR2535CTG for applications requiring higher current capacity; use STPS3045CT for applications requiring higher voltage margin and lower forward voltage dissipation; use SMC 30CTQ035 for direct electrical equivalence with improved compliance.

Frequently Asked Questions (FAQ)

Q: Can the MBR2535CTG replace the 30CTQ035 in all applications?

A: The MBR2535CTG maintains the same 35 V voltage rating and TO-220-3 package as the original part. The doubled current rating (30 A versus 15 A) makes it suitable for applications originally designed for 15 A operation. However, the higher forward voltage (820 mV @ 30 A versus 620 mV @ 15 A) at the higher current level should be evaluated for power dissipation impact in the specific circuit design.

Q: What is the advantage of the STPS3045CT over the original 30CTQ035?

A: The STPS3045CT provides a higher voltage rating (45 V versus 35 V), allowing operation in circuits with higher reverse voltage stress. The lower forward voltage (570 mV @ 15 A versus 620 mV @ 15 A) reduces power dissipation at the rated current. Both parts maintain the same 15 A current rating and TO-220-3 package configuration.

Q: Are all substitute parts compatible with the TO-220-3 package footprint?

A: All substitute parts listed are packaged in TO-220-3 through-hole configuration, maintaining mechanical and electrical compatibility with the original 30CTQ035 footprint. Pin configuration remains consistent across all options as a 1 Pair Common Cathode diode array.

Q: What is the significance of the RoHS compliance difference?

A: The original 30CTQ035 from Vishay is RoHS non-compliant, while all substitute parts (MBR2535CTG, STPS3045CT, and SMC 30CTQ035) are ROHS3 compliant. This compliance status is relevant for applications subject to RoHS regulations and environmental requirements in target markets.

Q: How do reverse leakage currents compare across the substitute options?

A: The original 30CTQ035 specifies 2 mA reverse leakage @ 35 V. The MBR2535CTG and STPS3045CT both specify 200 µA reverse leakage, representing a 10-fold reduction. The SMC 30CTQ035 specifies 1 mA reverse leakage @ 35 V, representing a 2-fold reduction. Lower reverse leakage indicates improved device quality and reduced standby current in circuit applications.

Q: Can the STPS3045CT be used in place of the 30CTQ035 in a 35 V rated circuit?

A: Yes. The STPS3045CT is rated for 45 V maximum reverse voltage, which exceeds the 35 V requirement of the original circuit. The part maintains the same 15 A current rating and TO-220-3 package. The lower forward voltage (570 mV versus 620 mV) provides a secondary benefit of reduced power dissipation.

Q: What is the product status significance for component selection?

A: The original 30CTQ035 from Vishay is classified as obsolete, indicating discontinued production and limited availability. All substitute parts are classified as active, ensuring ongoing availability and production support from their respective manufacturers. Active status is critical for long-term design support and procurement reliability.