STTH10R04G Equivalent & Substitute Parts

Part Overview

The STTH10R04G is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 400 V DC reverse voltage and 10 A average rectified current in a D2PAK surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and supply chain requirements.

Substiute Parts

STTH10R04G

STMicroelectronicsIn Stock: 719STTH10R04G Datasheet

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STTH10R04G-TR

STMicroelectronicsIn Stock: 2945STTH10R04G-TR Datasheet

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SDURB1040

SMC Diode SolutionsIn Stock: 2545SDURB1040 Datasheet

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SDURB1040CT

SMC Diode SolutionsIn Stock: 1628SDURB1040CT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STTH10R04G is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 400 V minimum
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Compatible Variation Criteria:

• Current - Average Rectified (Io): Equal to or greater than 10 A
• Voltage - Forward (Vf) (Max) @ If: Equal to or less than 1.7 V @ 10 A
• Reverse Recovery Time (trr): Equal to or less than 40 ns
• Current - Reverse Leakage @ Vr: Equal to or less than 10 µA @ 400 V
• Operating Temperature - Junction: Equal to or greater than 175°C
• RoHS Status: ROHS3 Compliant or equivalent
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts identified include STTH10R04G-TR (STMicroelectronics, active status), SDURB1040 (SMC Diode Solutions, active status), and SDURB1040CT (SMC Diode Solutions, active status, diode array configuration).

Parameter Comparison

Engineering Selection Recommendations

STTH10R04G-TR (STMicroelectronics)

This part is the direct equivalent of the obsolete STTH10R04G, differing only in packaging format (Tape & Reel versus bulk). Electrical specifications are identical across all critical parameters: 400 V reverse voltage, 10 A average rectified current, 1.7 V forward voltage at 10 A, and 40 ns reverse recovery time. Product status is active with 2870 units in stock. RoHS3 compliance and MSL 1 rating match the original specification. This substitute is suitable for direct replacement in production environments requiring tape and reel packaging.

SDURB1040 (SMC Diode Solutions)

This part meets the mandatory voltage (400 V), package (D2PAK), and speed classification requirements. Forward voltage is superior at 1.2 V @ 10 A compared to 1.7 V, reducing power dissipation. Reverse recovery time is 45 ns, marginally exceeding the original 40 ns specification. Operating temperature range is -55°C to 150°C, which does not reach the original 175°C maximum junction temperature. Product status is active with 2493 units in stock. RoHS3 compliance and MSL 1 rating are maintained. REACH status is affected. This substitute is applicable where the reduced maximum junction temperature does not constrain thermal design.

SDURB1040CT (SMC Diode Solutions)

This part is a diode array with 1 pair common cathode configuration, not a single diode. While it maintains 400 V reverse voltage, D2PAK package, and fast recovery speed classification, the diode array topology differs fundamentally from the single-diode STTH10R04G. Forward voltage is specified at 1.3 V @ 5 A (not 10 A), and reverse leakage current is elevated at 30 µA @ 400 V versus 10 µA. Operating temperature range is -55°C to 150°C. Product status is active with 1554 units in stock. This substitute is applicable only in circuit designs specifically requiring a common cathode diode pair configuration.

Frequently Asked Questions (FAQ)

Q: Can STTH10R04G-TR be used as a direct replacement for STTH10R04G?

A: Yes. STTH10R04G-TR is electrically identical to STTH10R04G across all specified parameters. The only difference is packaging format: STTH10R04G-TR is supplied in Tape & Reel format while STTH10R04G was supplied in bulk. Both are D2PAK surface mount packages suitable for automated assembly.

Q: What is the primary limitation of SDURB1040 as a substitute?

A: The maximum operating junction temperature of SDURB1040 is 150°C, compared to 175°C for STTH10R04G. Applications requiring sustained operation near 175°C junction temperature must account for this reduced thermal rating through design margin analysis or thermal management modifications.

Q: Why is SDURB1040CT not a direct substitute?

A: SDURB1040CT is a diode array with common cathode configuration, containing two diodes with a shared cathode connection. STTH10R04G is a single diode. Circuit topology and pin configuration differ fundamentally. SDURB1040CT is applicable only in designs requiring this specific diode pair arrangement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. STTH10R04G-TR, SDURB1040, and SDURB1040CT are all ROHS3 compliant, matching the original part specification.

Q: What is the difference between SDURB1040 and SDURB1040CT packaging?

A: SDURB1040 is supplied in Cut Tape (CT) format, while SDURB1040CT is supplied in Tape & Reel (TR) format. Both are surface mount packages suitable for automated assembly. Selection depends on production volume and assembly equipment compatibility.

Q: Does forward voltage difference affect circuit performance?

A: Forward voltage differences between substitutes and the original part affect power dissipation and voltage drop across the diode. SDURB1040 exhibits lower forward voltage (1.2 V @ 10 A) compared to STTH10R04G (1.7 V @ 10 A), resulting in reduced power loss. Circuit designs with tight voltage regulation requirements must account for this variation.

Q: Are all substitute parts available in equivalent quantities?

A: Inventory levels vary. STTH10R04G-TR has 2870 units in stock, SDURB1040 has 2493 units, and SDURB1040CT has 1554 units. Availability should be confirmed with the component supplier for production requirements.