DSEP30-03AS Equivalent & Substitute Parts

Part Overview

The DSEP30-03AS is a general-purpose rectifier diode manufactured by IXYS, rated for 300V DC reverse voltage and 30A average rectified current. This through-hole component operates in the HiPerFRED™ series and features fast recovery characteristics with a reverse recovery time of 22 ns. The device is actively produced and fully compliant with RoHS3 and REACH regulations.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified voltage and current ratings, while accommodating different mounting technologies or package configurations required by specific circuit designs.

Substiute Parts

DSEP30-03AS

IXYSIn Stock: 835DSEP30-03AS Datasheet

Current PartRFQ

STTH803G-TR

STMicroelectronicsIn Stock: 2585STTH803G-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSEP30-03AS is constrained by the following critical electrical parameters:

Voltage Rating Requirement: The substitute must maintain a DC reverse voltage rating of 300V or greater to ensure safe operation in the same circuit topology.

Current Rating Requirement: The substitute must support the 30A average rectified current specification. Parts with lower current ratings cannot be directly substituted without circuit redesign.

Recovery Characteristics: The substitute must operate within the fast recovery classification (≤ 500ns) to maintain switching performance and thermal characteristics of the original design.

Temperature Rating: The substitute must support a maximum junction temperature of 175°C or higher.

Regulatory Compliance: The substitute must maintain RoHS3 and REACH compliance status to satisfy supply chain and environmental requirements.

The STTH803G-TR does not meet the current rating requirement (8A versus 30A specification) and therefore cannot function as a direct electrical substitute for the DSEP30-03AS in applications requiring the full 30A capacity.

Parameter Comparison

Engineering Selection Recommendations

The DSEP30-03AS is an active product with full RoHS3 and REACH compliance. Both the main part and identified substitute maintain identical regulatory status and moisture sensitivity classification.

Direct Electrical Substitution: The STTH803G-TR cannot serve as a direct electrical substitute for the DSEP30-03AS due to a significant current rating differential (8A versus 30A). This difference represents a fundamental limitation in power handling capacity and cannot be overcome through circuit modification without altering the design intent.

Mounting Technology Consideration: The DSEP30-03AS employs through-hole mounting (TO-247AD package), while the STTH803G-TR uses surface-mount technology (D2PAK package). These mounting technologies require different PCB layouts and assembly processes.

Regulatory Compliance: Both components satisfy current supply chain requirements for RoHS3 and REACH compliance, ensuring equivalent environmental and regulatory standing.

Inventory Availability: The DSEP30-03AS maintains 779 pieces in stock, while the STTH803G-TR has 2569 pieces available. Component availability should be evaluated against project lead time requirements.

Frequently Asked Questions (FAQ)

Q: Can the STTH803G-TR replace the DSEP30-03AS in my circuit?

A: No. The STTH803G-TR is rated for 8A average rectified current, while the DSEP30-03AS is rated for 30A. The substitute cannot handle the specified current load and will not function as an equivalent component.

Q: What is the primary difference between these two diodes?

A: The primary difference is current rating. Both devices share the same 300V reverse voltage rating and 175°C maximum junction temperature. However, the DSEP30-03AS supports 30A continuous current, while the STTH803G-TR supports only 8A. Additionally, they use different package technologies: through-hole (TO-247AD) versus surface-mount (D2PAK).

Q: Are there compliance differences between these parts?

A: No. Both the DSEP30-03AS and STTH803G-TR maintain identical RoHS3 compliance status and REACH unaffected designation. Moisture sensitivity levels are also equivalent at MSL 1 (Unlimited).

Q: Why would I consider the STTH803G-TR if it cannot substitute for the DSEP30-03AS?

A: The STTH803G-TR is a separate product for applications requiring lower current capacity (8A or less). It is not a substitute for the DSEP30-03AS but rather a different component for different circuit requirements.

Q: What mounting considerations apply to these parts?

A: The DSEP30-03AS uses through-hole mounting (TO-247AD), requiring insertion into PCB holes and wave or selective soldering. The STTH803G-TR uses surface-mount technology (D2PAK), requiring SMT assembly processes. These mounting methods are not interchangeable on the same PCB without redesign.

Q: How do the forward voltage characteristics compare?

A: The DSEP30-03AS exhibits 1.55V forward voltage at its rated 30A current. The STTH803G-TR exhibits 1.25V forward voltage at its rated 8A current. These measurements are taken at different operating points and cannot be directly compared for thermal or efficiency analysis.

Q: Are the reverse recovery times equivalent?

A: Both devices are classified as fast recovery diodes. The DSEP30-03AS has a reverse recovery time of 22 ns, while the STTH803G-TR has 35 ns. Both values fall within the fast recovery specification (≤ 500ns), though the DSEP30-03AS exhibits faster recovery characteristics.