FFSB0665A Equivalent & Substitute Parts

Part Overview

The FFSB0665A is a silicon carbide Schottky diode manufactured by onsemi, rated for 650 V DC reverse voltage and 9 A average rectified current in a surface mount D2PAK package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs while maintaining the same functional specifications and package form factor.

Substiute Parts

FFSB0665A

onsemiIn Stock: 1501FFSB0665A Datasheet

Current PartRFQ

S3D06065G

SMC Diode SolutionsIn Stock: 1757S3D06065G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FFSB0665A is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 650 V
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab)
• Technology: SiC (Silicon Carbide) Schottky
• Operating Temperature - Junction: -55°C to 175°C
• Mounting Type: Surface Mount

Current Rating Consideration: The FFSB0665A is rated for 9 A average rectified current. Substitute parts with lower current ratings (such as 6 A) operate within the same voltage and package specifications but with reduced current capacity. Such substitutes are applicable only in circuits where the actual operating current does not exceed the substitute part's rating.

Performance Parameters: Forward voltage, reverse leakage current, and capacitance characteristics are secondary selection factors that influence efficiency and thermal performance but do not prevent substitution when primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: FFSB0665A (onsemi)

The FFSB0665A is the specified component and remains the first choice for new designs and applications requiring 9 A current capacity at 650 V. This part is Active status, RoHS3 compliant, and REACH unaffected, ensuring full regulatory compliance and supply chain stability.

Alternative Selection: S3D06065G (SMC Diode Solutions)

The S3D06065G is a qualified substitute when the circuit design operates at or below 6 A average rectified current. This part maintains identical voltage rating, package form factor, and operating temperature range. Both components are Active status and RoHS3 compliant. The S3D06065G carries REACH Affected status, which may require additional documentation in certain regulatory jurisdictions. The lower reverse leakage current (8 µA versus 200 µA) and marginally lower forward voltage (1.7 V versus 1.75 V) represent secondary performance advantages in low-leakage or efficiency-critical applications.

Selection Criteria:

• Use FFSB0665A for applications requiring the full 9 A current rating
• Use S3D06065G only when circuit current requirements do not exceed 6 A
• Both parts are suitable for identical thermal and mechanical environments
• Verify REACH compliance requirements for the application jurisdiction before selecting S3D06065G

Frequently Asked Questions (FAQ)

Q: Can S3D06065G replace FFSB0665A in all applications?

A: No. The S3D06065G is rated for 6 A average rectified current, while the FFSB0665A is rated for 9 A. Substitution is valid only when the actual operating current in the circuit does not exceed 6 A. Exceeding this rating will cause component failure.

Q: Are the packages identical between FFSB0665A and S3D06065G?

A: Yes. Both components use the TO-263-3 D2PAK package with identical pinout and mechanical dimensions, enabling direct board-level substitution without layout modifications.

Q: What is the difference in reverse leakage current between these parts?

A: The FFSB0665A exhibits 200 µA reverse leakage at 650 V, while the S3D06065G exhibits 8 µA at the same voltage. The S3D06065G has significantly lower leakage, which may reduce standby power consumption in certain circuit topologies.

Q: Are both parts RoHS compliant?

A: Yes. Both FFSB0665A and S3D06065G are RoHS3 compliant. However, S3D06065G is REACH Affected, while FFSB0665A is REACH Unaffected. Verify REACH compliance requirements for your application jurisdiction.

Q: What is the forward voltage difference at 6 A?

A: The FFSB0665A is rated at 1.75 V maximum forward voltage at 6 A, while the S3D06065G is rated at 1.7 V maximum at the same current. This 0.05 V difference is negligible for most applications but may be relevant in precision rectification circuits.

Q: Can I use FFSB0665A as a substitute for S3D06065G?

A: Yes. The FFSB0665A can replace S3D06065G in any application, as it provides higher current capacity (9 A versus 6 A) and identical voltage and package specifications. No circuit modifications are required.

Q: What is the operating temperature range for both parts?

A: Both FFSB0665A and S3D06065G operate across a junction temperature range of -55°C to 175°C, enabling use in industrial and automotive environments with identical thermal specifications.