Equivalent & Substitute Parts for 12CWQ03FN

Part Overview

The 12CWQ03FN is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 30 V DC reverse voltage and 6 A average rectified current per diode. The device is packaged in a Surface Mount TO-252-3 DPAK format with 2 leads plus tab (SC-63).

The 12CWQ03FN is classified as obsolete. Identification of equivalent and substitute parts is necessary to support ongoing design requirements, maintenance operations, and production continuity where this component is specified in existing applications.

Substiute Parts

12CWQ03FN

Vishay General Semiconductor - Diodes DivisionIn Stock: 465812CWQ03FN Datasheet

Current PartRFQ

VS-12CWQ03FN-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 3889VS-12CWQ03FN-M3 Datasheet

Parametric EquivalentRFQ

STPS15L30CB-TR

STMicroelectronicsIn Stock: 75086STPS15L30CB-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 12CWQ03FN is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Diode configuration must be 1 Pair Common Cathode
• Technology must be Schottky
• DC reverse voltage rating must be 30 V or greater
• Average rectified current per diode must be 6 A or greater
• Fast recovery speed characteristic (≤ 500ns, > 200mA)
• Operating temperature range must encompass -55°C to 150°C

Mechanical Compatibility Requirements:

• Mounting type must be Surface Mount
• Package must be TO-252-3, DPAK (2 Leads + Tab), SC-63

Two substitute parts meet these criteria and are identified in this reference:

1. VS-12CWQ03FN-M3 (Parametric Equivalent): Identical electrical and mechanical specifications with active product status and RoHS3 compliance.

2. STPS15L30CB-TR (Manufacturer Recommended): Exceeds minimum current rating (7.5 A vs. 6 A) and offers improved reverse leakage characteristics (1 mA vs. 3 mA) while maintaining identical voltage rating and package format.

Parameter Comparison

Engineering Selection Recommendations

VS-12CWQ03FN-M3 Selection Criteria:

The VS-12CWQ03FN-M3 is a direct parametric equivalent to the 12CWQ03FN with identical electrical specifications and mechanical packaging. This substitute is classified as an active product with RoHS3 compliance, making it suitable for applications requiring regulatory compliance with modern environmental standards. The VS-12CWQ03FN-M3 is the preferred substitute when exact electrical performance matching is required and RoHS compliance is a design requirement.

STPS15L30CB-TR Selection Criteria:

The STPS15L30CB-TR is a manufacturer-recommended substitute that provides enhanced performance characteristics. The increased current rating of 7.5 A per diode (versus 6 A) and reduced reverse leakage current of 1 mA (versus 3 mA) offer improved thermal and electrical performance margins. This device is manufactured by STMicroelectronics and carries RoHS3 compliance. The STPS15L30CB-TR is suitable for applications where performance enhancement and regulatory compliance are both required. The forward voltage specification of 480 mV at 7.5 A is marginally higher than the original 470 mV at 6 A, which is within acceptable engineering tolerance for Schottky diode applications.

Both substitute parts maintain identical package format (TO-252-3 DPAK) and mounting type (Surface Mount), ensuring direct mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the VS-12CWQ03FN-M3 be used as a direct replacement for the 12CWQ03FN?

A: Yes. The VS-12CWQ03FN-M3 is a parametric equivalent with identical electrical specifications, diode configuration, voltage rating, current rating, and package format. The primary difference is product status (active versus obsolete) and RoHS compliance (RoHS3 versus non-compliant).

Q: What are the advantages of using STPS15L30CB-TR over VS-12CWQ03FN-M3?

A: The STPS15L30CB-TR provides a higher current rating of 7.5 A per diode compared to 6 A, and exhibits lower reverse leakage current of 1 mA versus 3 mA. These characteristics result in improved thermal performance and reduced leakage losses. Both devices maintain the same 30 V voltage rating and identical package format.

Q: Are there any compatibility concerns when substituting the 12CWQ03FN?

A: Both substitute parts are mechanically and electrically compatible with the original 12CWQ03FN. They share identical package format (TO-252-3 DPAK), mounting type (Surface Mount), and diode configuration (1 Pair Common Cathode). No PCB redesign is required for substitution.

Q: Does the forward voltage difference between the substitutes affect circuit performance?

A: The forward voltage specifications are 470 mV @ 6 A for the 12CWQ03FN and VS-12CWQ03FN-M3, and 480 mV @ 7.5 A for the STPS15L30CB-TR. The 10 mV difference at higher current is within typical Schottky diode tolerance and does not present compatibility issues for standard rectification applications.

Q: Which substitute should be selected for new designs?

A: For new designs, either substitute is acceptable based on application requirements. The VS-12CWQ03FN-M3 provides exact electrical matching to the original specification. The STPS15L30CB-TR provides enhanced performance with higher current capacity and lower leakage. Both are active products with RoHS3 compliance.

Q: What is the operating temperature range for each substitute?

A: The 12CWQ03FN and VS-12CWQ03FN-M3 both specify -55°C to 150°C junction operating temperature. The STPS15L30CB-TR specifies a maximum junction temperature of 150°C. Applications requiring the full -55°C lower temperature limit should verify STPS15L30CB-TR specifications with the manufacturer.

Q: Are moisture sensitivity considerations different between the parts?

A: All three parts (12CWQ03FN, VS-12CWQ03FN-M3, and STPS15L30CB-TR) are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.