STTH8L06G Equivalent & Substitute Parts

Part Overview

The STTH8L06G is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 600 V DC reverse voltage and 8 A average rectified current in a D2PAK surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging and supplier options.

Substiute Parts

STTH8L06G

STMicroelectronicsIn Stock: 3274STTH8L06G Datasheet

Current PartRFQ

BYV29B-600,118

WeEn SemiconductorsIn Stock: 1057BYV29B-600,118 Datasheet

SimilarRFQ

DSEI36-06AS-TUB

IXYSIn Stock: 1880DSEI36-06AS-TUB Datasheet

SimilarRFQ

DSEI8-06AS-TUB

IXYSIn Stock: 1060DSEI8-06AS-TUB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STTH8L06G is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): 600 V minimum
• Current - Average Rectified (Io): 8 A minimum
• Mounting Type: Surface Mount
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), or TO-263AB equivalent
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: May vary within design margin
• Reverse Recovery Time (trr): Lower values acceptable (improved performance)
• Current - Reverse Leakage @ Vr: Higher values acceptable within design tolerance
• Operating Temperature - Junction: Lower maximum ratings acceptable if design permits

Substitute parts are grouped into two categories based on current rating alignment:

Category 1: Direct Current Rating Match (8 A)

• DSEI8-06AS-TUB (IXYS): Identical 8 A rating, improved reverse recovery time, active product status

Category 2: Higher Current Rating (9 A and above)

• BYV29B-600,118 (WeEn Semiconductors): 9 A rating, active product status
• DSEI36-06AS-TUB (IXYS): 37 A rating, FRED series, active product status

Parameter Comparison

Engineering Selection Recommendations

DSEI8-06AS-TUB (IXYS) - Primary Substitute

The DSEI8-06AS-TUB is the optimal substitute for direct replacement applications. It matches the 8 A current rating of the STTH8L06G, maintains 600 V reverse voltage specification, and operates within the same D2PAK package footprint. The DSEI8-06AS-TUB demonstrates improved reverse recovery time (50 ns versus 105 ns), lower reverse leakage current (20 µA versus 8 µA), and maintains active product status with ROHS3 compliance. The forward voltage is slightly elevated at 1.5 V compared to 1.3 V, which remains within acceptable design margins for most applications. Operating temperature maximum is reduced to 150°C, requiring thermal design verification for applications approaching 175°C junction temperature.

BYV29B-600,118 (WeEn Semiconductors) - Secondary Substitute

The BYV29B-600,118 provides a higher current rating of 9 A, suitable for applications requiring additional current margin or thermal headroom. This part maintains 600 V reverse voltage and D2PAK packaging compatibility. Forward voltage is reduced to 1.25 V at 8 A, offering improved efficiency. Reverse recovery time is significantly improved at 60 ns. However, reverse leakage current is elevated at 50 µA, and operating temperature maximum is limited to 150°C. This part is appropriate for designs where the 9 A rating provides design margin and thermal performance is not constrained.

DSEI36-06AS-TUB (IXYS) - High-Current Alternative

The DSEI36-06AS-TUB is a high-current variant rated for 37 A, suitable only for applications where current capacity is the primary selection criterion and thermal management is adequate. This part maintains 600 V reverse voltage and D2PAK packaging. Reverse recovery time is optimized at 50 ns. Forward voltage is elevated to 1.6 V at 37 A due to higher current operation. Reverse leakage current is significantly higher at 100 µA. Operating temperature range is specified as −40°C to 150°C. This part is not recommended for direct replacement of 8 A applications due to thermal and electrical characteristic mismatch.

Compliance and Availability

All substitute parts maintain ROHS3 compliance or equivalent RoHS certification, ensuring regulatory compatibility. DSEI8-06AS-TUB and DSEI36-06AS-TUB are REACH Unaffected. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080. Current inventory availability: BYV29B-600,118 (1019 pcs), DSEI36-06AS-TUB (1778 pcs), DSEI8-06AS-TUB (985 pcs).

Frequently Asked Questions (FAQ)

Q: Can DSEI8-06AS-TUB directly replace STTH8L06G in existing designs?

A: Yes, for applications where operating junction temperature does not exceed 150°C. The DSEI8-06AS-TUB maintains identical 8 A current rating, 600 V reverse voltage, and D2PAK package compatibility. Forward voltage is 1.5 V versus 1.3 V, requiring verification that this 0.2 V increase does not exceed design margins. Reverse recovery time is improved, which benefits switching performance.

Q: What is the primary difference between DSEI8-06AS-TUB and DSEI36-06AS-TUB?

A: Current rating is the primary difference: DSEI8-06AS-TUB is rated for 8 A, while DSEI36-06AS-TUB is rated for 37 A. The higher current rating of DSEI36-06AS-TUB results in elevated forward voltage (1.6 V at 37 A) and reverse leakage current (100 µA). DSEI8-06AS-TUB is the appropriate choice for 8 A applications.

Q: Is BYV29B-600,118 suitable for applications requiring exactly 8 A?

A: Yes. BYV29B-600,118 is rated for 9 A, providing 1 A additional margin above the 8 A requirement. This part is suitable for applications where current margin is beneficial. Forward voltage is reduced to 1.25 V, improving efficiency. Operating temperature maximum is 150°C, requiring thermal verification for high-temperature applications.

Q: What packaging considerations apply to these substitutes?

A: All substitute parts use TO-263-3, D2PAK (2 Leads + Tab) or TO-263AB equivalent packaging, maintaining PCB footprint compatibility with STTH8L06G. Supplier device packages are designated as D2PAK or TO-263AA, which are mechanically and electrically equivalent for surface mount assembly.

Q: Why is the operating temperature maximum lower for substitute parts?

A: STTH8L06G specifies 175°C maximum junction temperature, while substitute parts specify 150°C. This 25°C difference requires thermal design review for applications operating near the original specification limit. If design thermal margin is adequate at 150°C, substitutes are acceptable. If junction temperature approaches or exceeds 150°C, the original STTH8L06G specification must be maintained or thermal design must be revised.

Q: Are all substitute parts RoHS compliant?

A: Yes. DSEI8-06AS-TUB and DSEI36-06AS-TUB are ROHS3 Compliant. BYV29B-600,118 is RoHS Compliant. All parts meet regulatory requirements for RoHS-restricted applications.

Q: What is the significance of reverse recovery time differences?

A: Reverse recovery time (trr) affects switching speed and electromagnetic interference characteristics. STTH8L06G specifies 105 ns, while all substitute parts specify 50 ns or 60 ns. Lower reverse recovery time improves switching performance and reduces EMI. This is a beneficial characteristic change and does not require design modification.

Q: Can DSEI36-06AS-TUB be used in place of STTH8L06G for 8 A applications?

A: DSEI36-06AS-TUB is not recommended for direct replacement of 8 A applications. While it maintains 600 V reverse voltage and D2PAK packaging, the 37 A rating results in electrical characteristics optimized for higher current operation. Forward voltage is elevated to 1.6 V at 37 A, and reverse leakage current is 100 µA. DSEI8-06AS-TUB is the appropriate substitute for 8 A applications.