DSEP29-06B Equivalent & Substitute Parts

Part Overview

The DSEP29-06B is a general-purpose fast recovery rectifier diode manufactured by IXYS, rated for 600 V DC reverse voltage and 30 A average rectified current in a through-hole TO-220AC package. This diode is part of the HiPerFRED™ series and is classified as an active product with ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design optimization, or supply chain considerations.

Substiute Parts

DSEP29-06B

IXYSIn Stock: 2336DSEP29-06B Datasheet

Current PartRFQ

IDP40E65D2XKSA1

Infineon TechnologiesIn Stock: 2111IDP40E65D2XKSA1 Datasheet

SimilarRFQ

LQA03TC600

Power IntegrationsIn Stock: 17013LQA03TC600 Datasheet

SimilarRFQ

LXA06T600

Power IntegrationsIn Stock: 8165LXA06T600 Datasheet

SimilarRFQ

QH03TZ600

Power IntegrationsIn Stock: 2188QH03TZ600 Datasheet

SimilarRFQ

STTH506DTI

STMicroelectronicsIn Stock: 10289STTH506DTI Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSEP29-06B is determined by the following critical parameters:

Voltage Rating: The DC reverse voltage must equal or exceed 600 V to maintain circuit protection and reliability.

Current Rating: The average rectified current must equal or exceed 30 A to handle the design load without thermal stress.

Package Type: The TO-220AC or TO-220-2 through-hole package ensures mechanical and thermal compatibility with existing PCB layouts and heatsinking arrangements.

Speed Classification: Fast recovery characteristics (≤500 ns for >200 mA) are required to maintain switching performance and minimize switching losses.

Compliance: ROHS3 compliance is mandatory for regulatory alignment with the original part.

Substitute parts are grouped into two categories:

Category 1 - Higher Current Rating: Parts with current ratings exceeding 30 A (40 A) provide direct functional replacement with enhanced current capacity.

Category 2 - Lower Current Rating: Parts with current ratings below 30 A (3 A, 5 A, 6 A) are suitable only for applications where the actual circuit current demand is lower than the 30 A design specification.

Parameter Comparison

Engineering Selection Recommendations

IDP40E65D2XKSA1 (Infineon Technologies)

This substitute provides a direct functional upgrade with 40 A current capacity, exceeding the 30 A requirement of the DSEP29-06B. The 650 V reverse voltage rating provides additional margin above the 600 V specification. Both parts maintain ROHS3 compliance and identical operating temperature maximums of 175°C. The forward voltage drop is lower (2.3 V vs. 2.52 V), resulting in reduced power dissipation. The reverse recovery time is longer (75 ns vs. 30 ns), which may impact switching performance in high-frequency applications. This part is suitable for direct replacement in applications where the increased current capacity and voltage margin are beneficial.

LQA03TC600, QH03TZ600 (Power Integrations)

Both parts are rated for 3 A average rectified current and 600 V reverse voltage. These substitutes are suitable only for applications where the actual circuit current demand does not exceed 3 A. The QH03TZ600 offers superior reverse recovery time (9.8 ns) compared to the DSEP29-06B (30 ns), enabling faster switching. Both parts maintain RoHS compliance. The maximum junction temperature is limited to 150°C, which is 25°C lower than the DSEP29-06B. These parts are not suitable for direct replacement in 30 A applications.

LXA06T600 (Power Integrations)

This substitute is rated for 6 A average rectified current and 600 V reverse voltage. It is suitable only for applications where the actual circuit current demand does not exceed 6 A. The reverse recovery time (23 ns) is comparable to the DSEP29-06B (30 ns). RoHS compliance is maintained. The maximum junction temperature is limited to 150°C. This part is not suitable for direct replacement in 30 A applications.

STTH506DTI (STMicroelectronics)

This substitute is rated for 5 A average rectified current and 600 V reverse voltage. It is suitable only for applications where the actual circuit current demand does not exceed 5 A. The package includes insulation (TO-220AC ins), which may provide additional safety benefits in certain applications. ROHS3 compliance is maintained with a maximum junction temperature of 175°C. The reverse recovery time (25 ns) is comparable to the DSEP29-06B (30 ns). This part is not suitable for direct replacement in 30 A applications.

Frequently Asked Questions (FAQ)

Q: Can the IDP40E65D2XKSA1 be used as a direct replacement for the DSEP29-06B?

A: Yes. The IDP40E65D2XKSA1 meets or exceeds all critical electrical parameters: 650 V reverse voltage (vs. 600 V), 40 A current capacity (vs. 30 A), and identical TO-220-2 package. Both parts are ROHS3 compliant and rated to 175°C junction temperature. The lower forward voltage drop (2.3 V vs. 2.52 V) reduces power dissipation. The longer reverse recovery time (75 ns vs. 30 ns) may affect switching performance in high-frequency circuits and requires evaluation in the specific application.

Q: Why are the 3 A, 5 A, and 6 A rated diodes listed as substitutes if they cannot handle 30 A?

A: These lower-current parts are listed as substitutes for applications where the actual circuit current demand is lower than the 30 A design specification of the DSEP29-06B. They provide equivalent voltage ratings (600 V) and package compatibility (TO-220AC/TO-220-2) for reduced-current applications. Selection of these parts requires confirmation that the application current does not exceed the part's rated current.

Q: What is the significance of the TO-220AC versus TO-220-2 package designation?

A: TO-220AC and TO-220-2 refer to the same physical package with two leads. The designations are used interchangeably by different manufacturers. All substitute parts listed are compatible with existing TO-220-2 PCB layouts and heatsinking arrangements. The STTH506DTI includes an insulation layer (TO-220AC ins), which provides galvanic isolation between the diode and the heatsink.

Q: Does the reverse recovery time difference between the DSEP29-06B (30 ns) and IDP40E65D2XKSA1 (75 ns) affect circuit performance?

A: Reverse recovery time impacts switching losses and electromagnetic interference in high-frequency applications. The longer recovery time of the IDP40E65D2XKSA1 (75 ns) results in increased switching losses compared to the DSEP29-06B (30 ns). Applications operating above 50 kHz switching frequency require evaluation of this parameter. Lower-frequency applications (below 20 kHz) are generally unaffected by this difference.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are RoHS compliant. The DSEP29-06B, IDP40E65D2XKSA1, and STTH506DTI are ROHS3 compliant. The Power Integrations parts (LQA03TC600, LXA06T600, QH03TZ600) are RoHS compliant. All parts meet regulatory requirements for hazardous substance restrictions.

Q: What is the maximum junction temperature limitation for the Power Integrations substitutes?

A: The Power Integrations parts (LQA03TC600, LXA06T600, QH03TZ600) are rated to a maximum junction temperature of 150°C, which is 25°C lower than the DSEP29-06B (175°C). This limitation may affect thermal design margins in high-temperature applications. The DSEP29-06B and STTH506DTI both support 175°C maximum junction temperature.

Q: Can the QH03TZ600 be used in place of the DSEP29-06B for a 30 A application?

A: No. The QH03TZ600 is rated for 3 A average rectified current and cannot safely handle 30 A continuous current. Using an undersized diode in a 30 A application results in thermal runaway, junction temperature exceeding maximum ratings, and device failure. The QH03TZ600 is suitable only for applications where the actual circuit current does not exceed 3 A.