32CTQ030 Equivalent & Substitute Parts

Part Overview

The 32CTQ030 is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 30 V DC reverse voltage and 15 A average rectified current per diode. Manufactured by Vishay General Semiconductor - Diodes Division, this through-hole TO-220-3 package component is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts are necessary for ongoing design support and procurement continuity.

Substiute Parts

32CTQ030

Vishay General Semiconductor - Diodes DivisionIn Stock: 1365732CTQ030 Datasheet

Current PartRFQ

MBR2535CTLG

onsemiIn Stock: 1827MBR2535CTLG Datasheet

MFR RecommendedRFQ

STPS20L25CT

STMicroelectronicsIn Stock: 45313STPS20L25CT Datasheet

MFR RecommendedRFQ

STPS30L30CT

Vishay General Semiconductor - Diodes DivisionIn Stock: 2053STPS30L30CT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 32CTQ030 is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), technology (Schottky), mounting type (Through Hole), and package type (TO-220-3). Substitute parts must maintain these core characteristics to ensure mechanical and electrical compatibility.

Secondary parameters that define substitution boundaries include voltage rating (DC reverse voltage), current rating (average rectified current per diode), forward voltage drop, reverse leakage current, and operating temperature range. Substitute parts may exceed the original specifications in voltage or current ratings while maintaining the same package footprint and pin configuration.

The following substitute parts are qualified based on these criteria:

• MBR2535CTLG (onsemi): Exceeds voltage rating (35 V vs. 30 V); current rating reduced to 12.5 A; active product status
• STPS20L25CT (STMicroelectronics): Reduced voltage rating (25 V vs. 30 V); current rating reduced to 10 A; active product status
• STPS30L30CT (Vishay General Semiconductor - Diodes Division): Matches voltage and current ratings (30 V, 15 A); obsolete product status

Parameter Comparison

Engineering Selection Recommendations

MBR2535CTLG is the preferred substitute for new designs and procurement. This part is manufactured by onsemi and maintains active product status, ensuring long-term availability and supply chain stability. The MBR2535CTLG exceeds the original voltage specification (35 V vs. 30 V), providing additional design margin. The current rating is reduced to 12.5 A, which requires verification against application requirements. The part is ROHS3 compliant, meeting modern regulatory requirements that the original 32CTQ030 does not satisfy.

STPS30L30CT provides an exact electrical match to the 32CTQ030, with identical voltage (30 V) and current (15 A) ratings. However, this part shares obsolete product status with the original component, limiting its suitability for long-term applications. This part is RoHS non-compliant.

STPS20L25CT is suitable only for applications where the reduced voltage (25 V) and current (10 A) ratings are acceptable. This STMicroelectronics part is ROHS3 compliant and maintains active product status. The forward voltage drop is lower (460 mV @ 10 A), and reverse leakage is reduced (800 µA @ 25 V).

All substitute parts maintain the TO-220-3 package configuration and through-hole mounting type, ensuring mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the MBR2535CTLG directly replace the 32CTQ030 in all applications?

A: The MBR2535CTLG is mechanically compatible due to identical TO-220-3 packaging and pin configuration. However, the current rating is reduced from 15 A to 12.5 A. Applications operating at or near 15 A must be re-evaluated. The higher voltage rating (35 V vs. 30 V) provides additional margin and does not restrict substitution.

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

A: The 32CTQ030 is RoHS non-compliant, while MBR2535CTLG and STPS20L25CT are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, only the compliant substitutes are acceptable. RoHS compliance affects material composition and manufacturing processes.

Q: Is the STPS30L30CT a suitable substitute?

A: The STPS30L30CT provides an exact electrical match with identical voltage and current ratings. However, it shares obsolete product status with the original 32CTQ030, making it unsuitable for new designs or long-term procurement strategies. It is recommended only for legacy system maintenance where exact specifications are critical and availability is confirmed.

Q: How do forward voltage differences affect circuit performance?

A: The 32CTQ030 has a forward voltage of 490 mV @ 15 A, while substitutes range from 460 mV to 470 mV. Lower forward voltage reduces power dissipation and heat generation. Applications with tight thermal budgets benefit from the lower forward voltage of STPS30L30CT (460 mV) or STPS20L25CT (460 mV).

Q: What is the impact of reverse leakage current differences?

A: The 32CTQ030 exhibits 1.75 mA reverse leakage @ 30 V. The MBR2535CTLG shows higher leakage (5 mA @ 35 V), while STPS20L25CT shows lower leakage (800 µA @ 25 V). Higher reverse leakage increases standby power consumption. Applications sensitive to leakage current should prioritize STPS20L25CT or STPS30L30CT.

Q: Are there temperature range considerations for substitution?

A: The 32CTQ030 operates from -55°C to 150°C. The MBR2535CTLG extends the lower temperature limit to -65°C, providing wider operating range. STPS20L25CT and STPS30L30CT specify only a maximum junction temperature of 150°C without a minimum temperature specification. Applications requiring operation below -55°C should use MBR2535CTLG.

Q: Can STPS20L25CT be used in applications requiring 30 V operation?

A: No. The STPS20L25CT is rated for 25 V maximum DC reverse voltage. Applications requiring 30 V operation must use either the 32CTQ030, STPS30L30CT, or MBR2535CTLG. Using an underrated component creates risk of diode failure and circuit malfunction.