STTH802BY-TR Equivalent & Substitute Parts

Part Overview

The STTH802BY-TR is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 8 A average rectified current. The device is housed in a Surface Mount DPAK package (TO-252-3) and features fast recovery characteristics with a reverse recovery time of 30 ns. This diode is classified as Active product status and carries automotive-grade qualification under AEC-Q101, making it suitable for demanding applications requiring high reliability and temperature stability across the -40°C to 175°C junction temperature range.

Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

STTH802BY-TR

STMicroelectronicsIn Stock: 4436STTH802BY-TR Datasheet

Current PartRFQ

SDURD820

SMC Diode SolutionsIn Stock: 31202SDURD820 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STTH802BY-TR are identified based on strict electrical and mechanical parameter matching within the following criteria:

Electrical Compatibility Requirements:

• Voltage - DC Reverse (Vr) (Max): 200 V minimum
• Current - Average Rectified (Io): 8 A minimum
• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Mounting Type: Surface Mount
• Technology: Standard
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Parameter Variations:

• Voltage - Forward (Vf) (Max) @ If: Within standard rectifier diode tolerances
• Reverse Recovery Time (trr): Within fast recovery classification
• Current - Reverse Leakage @ Vr: Within acceptable leakage specifications
• Operating Temperature - Junction: Minimum -40°C to maximum 175°C coverage required

The SDURD820 manufactured by SMC Diode Solutions meets all electrical and mechanical compatibility criteria for direct substitution in the STTH802BY-TR application.

Parameter Comparison

Engineering Selection Recommendations

STTH802BY-TR (Primary Selection): The STTH802BY-TR is the original specified component and remains the primary selection. It carries automotive-grade qualification under AEC-Q101 and is classified as Active product status. The device features a lower forward voltage drop (1.05 V @ 8 A) and faster reverse recovery time (30 ns), resulting in improved efficiency and reduced switching losses. The operating temperature range extends to 175°C at the junction, providing superior thermal margin in high-temperature applications. This component is suitable for automotive and industrial applications requiring AEC-Q101 certification.

SDURD820 (Substitute Selection): The SDURD820 is a direct electrical and mechanical substitute for the STTH802BY-TR. Both devices share identical voltage and current ratings, package configuration, and fast recovery speed classification. The SDURD820 exhibits lower reverse leakage current (5 µA versus 6 µA) and maintains ROHS3 compliance with MSL 1 rating. The operating temperature range is -55°C to 150°C, which covers the minimum junction temperature requirement but does not extend to the upper temperature limit of the original part. The forward voltage drop is slightly higher at 1.2 V @ 8 A, and reverse recovery time is marginally longer at 35 ns, both within acceptable rectifier diode tolerances. The SDURD820 is Active product status and suitable for general-purpose rectification applications where AEC-Q101 certification is not required.

Selection Criteria:

• Use STTH802BY-TR for automotive applications requiring AEC-Q101 qualification or designs operating above 150°C junction temperature.
• Use SDURD820 for general-purpose rectification applications where automotive qualification is not mandatory and operating temperatures remain within -55°C to 150°C range.
• Both components are ROHS3 compliant and carry MSL 1 rating, suitable for standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SDURD820 be used as a direct replacement for the STTH802BY-TR in automotive applications?

A: The SDURD820 is electrically and mechanically compatible with the STTH802BY-TR. However, the STTH802BY-TR carries AEC-Q101 automotive qualification while the SDURD820 does not. If AEC-Q101 certification is a design requirement, the STTH802BY-TR must be used. For non-automotive applications, the SDURD820 is a valid substitute.

Q: What is the impact of the forward voltage difference between these parts?

A: The STTH802BY-TR has a forward voltage of 1.05 V @ 8 A, while the SDURD820 is rated at 1.2 V @ 8 A. This 0.15 V difference results in slightly higher power dissipation in the SDURD820. For applications sensitive to power loss or thermal management, the STTH802BY-TR is preferred. For general-purpose rectification, this difference is typically acceptable.

Q: Are both parts suitable for high-temperature applications?

A: The STTH802BY-TR operates to 175°C junction temperature, while the SDURD820 operates to 150°C. For applications requiring operation above 150°C, the STTH802BY-TR is required. Both parts are suitable for standard industrial temperature ranges.

Q: Do both parts use the same package and mounting process?

A: Yes. Both the STTH802BY-TR and SDURD820 use the TO-252-3 DPAK package (2 Leads + Tab, SC-63) and are Surface Mount devices. They are mechanically interchangeable and use identical PCB footprints and reflow soldering processes.

Q: What is the difference in reverse recovery time between these parts?

A: The STTH802BY-TR has a reverse recovery time of 30 ns, while the SDURD820 is rated at 35 ns. Both are classified as Fast Recovery diodes (≤ 500ns, > 200mA). The 5 ns difference is negligible for most applications and does not affect switching frequency capability or EMI performance in standard rectification circuits.

Q: Are both parts RoHS compliant?

A: Yes. Both the STTH802BY-TR and SDURD820 are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or assembly.