Equivalent & Substitute Parts for 32CTQ030S Schottky Diode Array

Part Overview

The 32CTQ030S is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as 1 pair common cathode with 30V reverse voltage rating and 15A average rectified current per diode. The device is packaged in TO-263-3 (D2PAK) surface mount format. This part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and design requirements. Alternative parts maintain the same electrical specifications and mechanical compatibility while offering active product status and improved compliance certifications.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io) (per Diode)	15 A
Voltage - Forward (Vf) (Max) @ If	490 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1.75 mA @ 30 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 32CTQ030S are grouped into two categories based on substitution logic:

Parametric Equivalents (Vishay): Parts VS-32CTQ030STRLHM3, VS-32CTQ030STRR-M3, and VS-32CTQ030STRRHM3 are direct parametric equivalents manufactured by Vishay. These parts maintain identical electrical specifications including 30V reverse voltage, 15A average rectified current, 490mV forward voltage at 15A, and fast recovery speed characteristics. All three parts are packaged in Tape & Reel (TR) format and feature RoHS3 compliance. The key differentiator is product status: all three are active parts, whereas the original 32CTQ030S is obsolete. VS-32CTQ030STRLHM3 and VS-32CTQ030STRRHM3 include automotive grade qualification (AEC-Q101).

Manufacturer Recommended Alternatives (STMicroelectronics): Parts STPS3030CG-TR, STPS30L30CG-TR, and STPS41L30CG-TR are STMicroelectronics alternatives that maintain core electrical compatibility within the allowed parameter range. STPS3030CG-TR and STPS30L30CG-TR match the 15A current rating with identical 30V reverse voltage and fast recovery characteristics. STPS41L30CG-TR provides a higher current rating of 20A while maintaining 30V reverse voltage, offering design margin for applications requiring increased current capacity. All three STMicroelectronics parts are active, RoHS3 compliant, and packaged in industry-standard D2PAK format.

Substitution Criteria: All substitute parts share the following mandatory parameters with 32CTQ030S:

Diode configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 30 V
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parameter Comparison

Part Number	Manufacturer	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Product Status	RoHS Status	Packaging	Automotive Grade
32CTQ030S	Vishay	15 A	490 mV @ 15 A	1.75 mA @ 30 V	Obsolete	Non-compliant	Bulk	No
VS-32CTQ030STRLHM3	Vishay	15 A	490 mV @ 15 A	1.75 mA @ 30 V	Active	RoHS3 Compliant	Tape & Reel (TR)	Yes (AEC-Q101)
VS-32CTQ030STRR-M3	Vishay	15 A	490 mV @ 15 A	1.75 mA @ 30 V	Active	RoHS3 Compliant	Tape & Reel (TR)	No
VS-32CTQ030STRRHM3	Vishay	15 A	490 mV @ 15 A	1.75 mA @ 30 V	Active	RoHS3 Compliant	Tape & Reel (TR)	Yes (AEC-Q101)
STPS3030CG-TR	STMicroelectronics	15 A	490 mV @ 15 A	1 mA @ 30 V	Active	RoHS3 Compliant	Tape & Reel (TR)	No
STPS30L30CG-TR	STMicroelectronics	15 A	460 mV @ 15 A	1.5 mA @ 60 V	Active	RoHS3 Compliant	Cut Tape (CT) & Digi-Reel®	No
STPS41L30CG-TR	STMicroelectronics	20 A	480 mV @ 20 A	1.5 mA @ 30 V	Active	RoHS3 Compliant	Cut Tape (CT) & Digi-Reel®	No

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select VS-32CTQ030STRLHM3 or VS-32CTQ030STRRHM3 when the application requires exact electrical and thermal performance matching. Both parts are Vishay products with active status and RoHS3 compliance. VS-32CTQ030STRLHM3 and VS-32CTQ030STRRHM3 include AEC-Q101 automotive qualification, making them suitable for automotive applications. VS-32CTQ030STRR-M3 provides an alternative without automotive qualification for non-automotive applications.

For Cross-Manufacturer Substitution: STPS3030CG-TR from STMicroelectronics provides identical current and voltage ratings with marginally lower reverse leakage current (1 mA vs. 1.75 mA @ 30V), offering improved performance characteristics while maintaining active product status and RoHS3 compliance.

For Enhanced Current Capacity: STPS41L30CG-TR offers 20A average rectified current per diode while maintaining 30V reverse voltage rating. This part is suitable for applications where the original 15A specification provides insufficient margin or where design upgrades require higher current handling. Forward voltage at 20A is 480 mV, comparable to the original specification at 15A.

For Reduced Forward Voltage: STPS30L30CG-TR features 460 mV forward voltage at 15A, representing a 30 mV reduction compared to the original 32CTQ030S specification. This part is applicable in power-sensitive designs where minimizing forward voltage drop improves efficiency.

All recommended substitutes maintain the TO-263-3 D2PAK package format, ensuring mechanical and thermal compatibility with existing PCB layouts and thermal management designs.

Frequently Asked Questions (FAQ)

Q: Can VS-32CTQ030STRLHM3 be used as a direct replacement for 32CTQ030S?

A: Yes. VS-32CTQ030STRLHM3 is a parametric equivalent with identical electrical specifications: 30V reverse voltage, 15A average rectified current per diode, 490mV forward voltage at 15A, and fast recovery characteristics. Both parts use the same TO-263-3 D2PAK package. The primary differences are product status (active vs. obsolete) and compliance certifications (RoHS3 compliant with AEC-Q101 automotive qualification).

Q: What is the difference between VS-32CTQ030STRR-M3 and VS-32CTQ030STRLHM3?

A: Both parts are Vishay parametric equivalents with identical electrical specifications and active product status. The key difference is automotive qualification: VS-32CTQ030STRLHM3 includes AEC-Q101 automotive grade qualification, while VS-32CTQ030STRR-M3 does not. Select VS-32CTQ030STRLHM3 for automotive applications requiring AEC-Q101 compliance.

Q: Can STPS3030CG-TR replace 32CTQ030S in all applications?

A: STPS3030CG-TR maintains identical current and voltage ratings (15A, 30V) and package format (D2PAK). The reverse leakage current is lower (1 mA vs. 1.75 mA @ 30V), which is a performance improvement. Both parts are RoHS3 compliant and active. Substitution is valid for applications where the electrical specifications are within tolerance.

Q: Why would STPS41L30CG-TR be selected over STPS3030CG-TR?

A: STPS41L30CG-TR provides 20A average rectified current per diode compared to 15A in STPS3030CG-TR, while maintaining the same 30V reverse voltage rating and D2PAK package. Select STPS41L30CG-TR when the application requires higher current capacity or when design margin for current is necessary. Both parts are active and RoHS3 compliant.

Q: What is the significance of the packaging format differences (Tape & Reel vs. Cut Tape)?

A: Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® are packaging and delivery formats that do not affect electrical or mechanical compatibility. Tape & Reel is standard for high-volume automated assembly. Cut Tape & Digi-Reel® provides flexibility for lower-volume or mixed-component orders. All substitute parts maintain the same TO-263-3 D2PAK component package format for PCB mounting.

Q: Is STPS30L30CG-TR suitable for applications sensitive to forward voltage drop?

A: Yes. STPS30L30CG-TR features 460 mV forward voltage at 15A, which is 30 mV lower than the original 32CTQ030S specification (490 mV @ 15A). This reduction improves efficiency in power conversion applications. The part maintains 30V reverse voltage, 15A current rating, and D2PAK package compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (VS-32CTQ030STRLHM3, VS-32CTQ030STRR-M3, VS-32CTQ030STRRHM3, STPS3030CG-TR, STPS30L30CG-TR, and STPS41L30CG-TR) are RoHS3 compliant. The original 32CTQ030S is RoHS non-compliant, making substitution necessary for applications requiring RoHS compliance.

Q: Do all substitute parts support the same operating temperature range?

A: The Vishay parametric equivalents (VS-32CTQ030STRLHM3, VS-32CTQ030STRR-M3, VS-32CTQ030STRRHM3) maintain the original operating temperature range of -55°C to 150°C junction temperature. STMicroelectronics parts specify 150°C maximum junction temperature. For applications requiring the full -55°C to 150°C range, Vishay parametric equivalents are recommended.

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