DGSK40-025AS Equivalent & Substitute Parts

Part Overview

The DGSK40-025AS is a Schottky diode array manufactured by IXYS, configured as a 1 Pair Common Cathode arrangement in a Surface Mount TO-263-3 (D2PAK) package. This component is rated for 250 V DC reverse voltage with 18 A average rectified current per diode and features fast recovery characteristics. The product is currently classified as Obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and procurement needs.

Substiute Parts

DGSK40-025AS

IXYSIn Stock: 1095DGSK40-025AS Datasheet

Current PartRFQ

STTH30R03CG-TR

STMicroelectronicsIn Stock: 4420STTH30R03CG-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DGSK40-025AS is determined by the following critical parameters:

Configuration Match: The substitute must maintain a 1 Pair Common Cathode diode array configuration to ensure pin-compatible operation within existing circuit layouts.

Package Compatibility: The substitute must use the TO-263-3 (D2PAK) Surface Mount package with identical lead configuration (2 Leads + Tab) to support direct board-level replacement without layout modifications.

Electrical Performance Envelope: The substitute must satisfy the following conditions:

• Voltage rating (Vr) equal to or greater than 250 V
• Current rating (Io) equal to or greater than 18 A per diode
• Forward voltage (Vf) characteristics compatible with circuit design parameters
• Fast recovery speed characteristics (≤ 500ns, > 200mA)

Environmental and Compliance Requirements: The substitute must maintain MSL 1 classification and REACH compliance status to ensure manufacturing process compatibility.

The STTH30R03CG-TR meets these substitution criteria with electrical parameters that exceed the minimum requirements of the DGSK40-025AS while maintaining identical package and configuration specifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The DGSK40-025AS is classified as Obsolete, while the STTH30R03CG-TR is Active. The substitute component is currently manufactured and supported by STMicroelectronics, ensuring long-term availability and supply chain stability.

Compliance and Certification: Both components maintain identical REACH compliance status (REACH Unaffected) and MSL 1 classification, ensuring compatibility with standard manufacturing processes and environmental requirements.

Electrical Parameter Analysis: The STTH30R03CG-TR provides a higher voltage rating (300 V vs. 250 V), which is acceptable for applications designed for the DGSK40-025AS. However, the substitute exhibits a lower current rating (15 A vs. 18 A per diode) and higher forward voltage drop (1.9 V @ 15 A vs. 1.5 V @ 7.5 A). These differences require evaluation within the specific circuit application to confirm thermal and performance compatibility.

Package and Configuration: Both components utilize identical TO-263-3 (D2PAK) Surface Mount packaging with 1 Pair Common Cathode configuration, enabling direct board-level substitution without layout modifications.

Technology Difference: The DGSK40-025AS employs Schottky technology, while the STTH30R03CG-TR uses Standard diode technology. This difference affects forward voltage characteristics and reverse recovery behavior, requiring circuit-level validation.

Frequently Asked Questions (FAQ)

Q: Can the STTH30R03CG-TR directly replace the DGSK40-025AS without PCB layout changes?

A: Yes, both components use identical TO-263-3 (D2PAK) Surface Mount packaging with the same pin configuration (2 Leads + Tab). Direct board-level substitution is possible without layout modifications.

Q: What is the impact of the lower current rating (15 A vs. 18 A) on circuit performance?

A: The STTH30R03CG-TR is rated for 15 A average rectified current per diode, compared to 18 A for the DGSK40-025AS. Applications operating at or near the 18 A specification require thermal analysis to confirm the substitute can handle the intended current load without exceeding junction temperature limits.

Q: How does the higher forward voltage drop of the substitute affect circuit design?

A: The STTH30R03CG-TR exhibits a forward voltage of 1.9 V @ 15 A, compared to 1.5 V @ 7.5 A for the DGSK40-025AS. This 0.4 V difference increases power dissipation and heat generation. Circuit designs sensitive to forward voltage drop require recalculation of power loss and thermal management.

Q: Why does the STTH30R03CG-TR have significantly lower reverse leakage current?

A: The substitute exhibits 20 µA @ 300 V leakage current compared to 2 mA @ 250 V for the main part. This difference is attributable to the Standard diode technology used in the substitute versus the Schottky technology of the original component. Lower leakage current reduces standby power consumption.

Q: Is the STTH30R03CG-TR suitable for high-temperature applications?

A: Both components support a maximum junction temperature of 175°C. The DGSK40-025AS specifies an operating range of -55°C to 175°C, while the STTH30R03CG-TR specifies a maximum of 175°C. Applications requiring operation below -55°C require alternative components.

Q: What is the significance of the 35 ns reverse recovery time specification for the substitute?

A: The STTH30R03CG-TR specifies a reverse recovery time (trr) of 35 ns, indicating the time required for the diode to transition from forward to reverse bias. This parameter is relevant for high-frequency switching applications and is not specified for the DGSK40-025AS.

Q: Are there any compliance or supply chain advantages to using the STTH30R03CG-TR?

A: The STTH30R03CG-TR is classified as Active product status, indicating current manufacturing and support by STMicroelectronics. The DGSK40-025AS is Obsolete, making the substitute preferable for new designs and long-term supply chain stability. Both components maintain identical REACH compliance and MSL 1 classification.