DGS3-025AS Equivalent & Substitute Parts

Part Overview

The DGS3-025AS is a Schottky diode manufactured by IXYS, rated for 250V DC reverse voltage with 5.4A average rectified current in a surface mount TO-252AA package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain compatibility with existing circuit designs while meeting or exceeding the electrical and mechanical specifications of the original component.

Substiute Parts

DGS3-025AS

IXYSIn Stock: 915DGS3-025AS Datasheet

Current PartRFQ

SURD8530T4G-VF01

onsemiIn Stock: 1185SURD8530T4G-VF01 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DGS3-025AS are identified based on the following critical parameters that determine functional equivalence:

Voltage Rating Compatibility: The substitute must support a DC reverse voltage rating equal to or greater than 250V to ensure safe operation in the original circuit application.

Current Rating Compatibility: The substitute must support an average rectified current rating equal to or greater than 5.4A to handle the design load without thermal or electrical stress.

Package Compatibility: The substitute must utilize the TO-252-3 DPAK package with identical pinout and mechanical dimensions to ensure direct board-level replacement without layout modifications.

Speed Classification: The substitute must maintain fast recovery characteristics (≤ 500ns, > 200mA) to preserve switching performance and minimize reverse recovery losses.

Mounting Type: The substitute must be surface mount technology to maintain compatibility with existing PCB assembly processes.

Temperature Range: The substitute must support the operating junction temperature range of -55°C to 175°C or a range that encompasses this specification.

Parameter Comparison

Engineering Selection Recommendations

The SURD8530T4G-VF01 from onsemi presents a qualified alternative to the obsolete DGS3-025AS. This substitute maintains identical package geometry and mounting type, enabling direct PCB-level replacement without layout modifications.

The substitute demonstrates superior electrical performance in reverse leakage current (5 µA versus 700 µA at rated voltage) and forward voltage characteristics (1.05 V @ 5A versus 1.6 V @ 2A). The substitute's 300V reverse voltage rating exceeds the original 250V specification, providing additional design margin.

A critical consideration exists regarding current rating: the SURD8530T4G-VF01 is rated for 5A average rectified current, which is 0.4A below the original DGS3-025AS specification of 5.4A. Circuit designs operating at or near the 5.4A maximum must be evaluated to confirm that the 5A substitute rating remains acceptable for the intended application.

The SURD8530T4G-VF01 carries active product status with AEC-Q101 automotive qualification and ROHS3 compliance, ensuring long-term availability and regulatory alignment. Both components share identical fast recovery speed classification and MSL rating.

Frequently Asked Questions (FAQ)

Q: Can the SURD8530T4G-VF01 directly replace the DGS3-025AS without PCB modifications?

A: Yes. Both components utilize the TO-252-3 DPAK package with identical pinout and mechanical dimensions. Direct board-level substitution is possible without layout changes.

Q: What is the significance of the current rating difference (5.4A versus 5A)?

A: The original DGS3-025AS supports 5.4A average rectified current, while the SURD8530T4G-VF01 supports 5A. Circuits designed to operate continuously at currents exceeding 5A require thermal and electrical analysis to confirm the substitute remains within safe operating limits. Circuits operating below 5A experience no constraint.

Q: Does the higher voltage rating (300V versus 250V) of the substitute create any compatibility issues?

A: No. A higher voltage rating provides additional design margin and does not create compatibility issues. The substitute safely operates in circuits designed for 250V operation.

Q: Are there compliance or qualification differences between these components?

A: The SURD8530T4G-VF01 carries AEC-Q101 automotive qualification and ROHS3 compliance status. The original DGS3-025AS is classified as obsolete. Both components are REACH Unaffected and carry EAR99 ECCN classification.

Q: What is the impact of the lower forward voltage in the substitute?

A: The SURD8530T4G-VF01 exhibits lower forward voltage (1.05V @ 5A) compared to the DGS3-025AS (1.6V @ 2A). This characteristic reduces power dissipation and heat generation in the substitute, providing a performance advantage in thermal-sensitive applications.

Q: How do the reverse leakage characteristics compare?

A: The SURD8530T4G-VF01 demonstrates significantly lower reverse leakage current (5 µA @ 300V) compared to the DGS3-025AS (700 µA @ 250V). This superior leakage performance reduces standby power consumption and improves circuit efficiency.

Q: Are the operating temperature ranges compatible?

A: Both components support a maximum junction temperature of 175°C. The SURD8530T4G-VF01 extends the minimum temperature to -65°C, exceeding the original -55°C specification. This provides additional low-temperature operational margin.