FFSB0665B Silicon Carbide Schottky Diode Equivalent & Substitute Parts

Part Overview

The FFSB0665B is a silicon carbide Schottky diode manufactured by onsemi, rated for 650 V DC reverse voltage and 8 A average rectified current. This component is designed for surface mount applications in the TO-263 (D2PAK) package configuration. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter ranges. Alternative sources and packaging formats provide design flexibility while preserving circuit functionality and thermal characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	650	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 6 A	V @ A
Current - Reverse Leakage @ Vr	40	µA @ 650 V
Technology	SiC (Silicon Carbide) Schottky	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution classification is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 650 V
Current - Average Rectified (Io): 8 A or greater
Technology: SiC (Silicon Carbide) Schottky
Package / Case: TO-263-3, D2PAK (2 Leads + Tab)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 175°C minimum

Parametric Equivalent Classification: Parts designated as parametric equivalents maintain identical or superior electrical ratings within the specified operating envelope. These parts are interchangeable at the circuit level when packaging format compatibility is confirmed.

Similar Manufacturer Classification: Parts classified as similar maintain the same voltage and technology specifications but may exceed current ratings or exhibit variations in secondary parameters such as forward voltage or reverse leakage current. These parts are suitable for applications where the higher current capability does not create thermal or design constraint conflicts.

Parameter Comparison

Parameter	FFSB0665B	FFSB0665B-F085	S3D08065G	PCDB0865G1_R2_00001
Manufacturer	onsemi	onsemi	SMC Diode Solutions	Panjit International Inc.
Voltage - DC Reverse (Vr) (Max)	650 V	650 V	650 V	650 V
Current - Average Rectified (Io)	8 A	8 A	23 A	8 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 6 A	1.7 V @ 6 A	1.8 V @ 8 A	1.7 V @ 8 A
Current - Reverse Leakage @ Vr	40 µA @ 650 V	40 µA @ 650 V	51 µA @ 650 V	60 µA @ 650 V
Technology	SiC Schottky	SiC Schottky	SiC Schottky	SiC Schottky
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 175 °C	-55 to 175 °C	-55 to 175 °C	-55 to 175 °C
Packaging Format	Cut Tape (CT)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

FFSB0665B-F085 (onsemi)

This part is a parametric equivalent to the FFSB0665B with identical electrical specifications. The primary distinction is packaging format: FFSB0665B-F085 is supplied in Tape & Reel (TR) format versus Cut Tape (CT) for the base part. Both maintain Active product status, ROHS3 compliance, and unlimited moisture sensitivity rating. Selection of this substitute is appropriate for high-volume production environments where reel packaging provides manufacturing efficiency benefits.

S3D08065G (SMC Diode Solutions)

This part is classified as a similar manufacturer substitute with equivalent 650 V reverse voltage rating and SiC Schottky technology. The current rating of 23 A exceeds the 8 A specification of the FFSB0665B. Forward voltage at 1.8 V @ 8 A is marginally higher than the 1.7 V @ 6 A specification. Reverse leakage current is 51 µA @ 650 V compared to 40 µA @ 650 V for the base part. This part is suitable for applications where higher current capacity is beneficial or where thermal margin is required. All compliance certifications (ROHS3, MSL 1) are maintained.

PCDB0865G1_R2_00001 (Panjit International Inc.)

This part is a parametric equivalent with 650 V reverse voltage and 8 A current rating matching the FFSB0665B specification. Forward voltage is 1.7 V @ 8 A, consistent with the base part. Reverse leakage current is 60 µA @ 650 V, which is elevated compared to the 40 µA specification but remains within acceptable operating parameters for most applications. This part maintains Active product status, ROHS3 compliance, and unlimited moisture sensitivity rating. Selection is appropriate when onsemi supply is constrained or when alternative manufacturer sourcing is required for supply chain resilience.

Frequently Asked Questions (FAQ)

Q: Can FFSB0665B-F085 be used as a direct replacement for FFSB0665B?

A: Yes. FFSB0665B-F085 is a parametric equivalent with identical electrical specifications. The only difference is packaging format: FFSB0665B-F085 is supplied in Tape & Reel (TR) format while FFSB0665B is supplied in Cut Tape (CT) format. Both parts are mechanically and electrically interchangeable in the TO-263 (D2PAK) package.

Q: What is the difference between the S3D08065G and FFSB0665B?

A: The S3D08065G is manufactured by SMC Diode Solutions and shares the same 650 V reverse voltage rating and SiC Schottky technology. The primary difference is current rating: S3D08065G is rated for 23 A average rectified current compared to 8 A for FFSB0665B. Forward voltage is 1.8 V @ 8 A versus 1.7 V @ 6 A for the base part. Reverse leakage is 51 µA @ 650 V compared to 40 µA @ 650 V. The S3D08065G is suitable for applications requiring higher current capacity or additional thermal margin.

Q: Is PCDB0865G1_R2_00001 compatible with FFSB0665B in existing designs?

A: Yes. PCDB0865G1_R2_00001 is a parametric equivalent with matching 650 V reverse voltage and 8 A current rating. Both parts use SiC Schottky technology and are packaged in TO-263 (D2PAK) format. Reverse leakage current is 60 µA @ 650 V compared to 40 µA @ 650 V for FFSB0665B, which represents a measurable but acceptable variation for most circuit applications. This part is suitable for direct substitution when supply from onsemi is unavailable.

Q: What packaging formats are available for these substitute parts?

A: FFSB0665B is supplied in Cut Tape (CT) format. FFSB0665B-F085, S3D08065G, and PCDB0865G1_R2_00001 are all supplied in Tape & Reel (TR) format. All parts use the same TO-263 (D2PAK) mechanical package with 2 leads plus tab configuration. Tape & Reel format is standard for high-volume manufacturing and automated assembly processes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. FFSB0665B, FFSB0665B-F085, S3D08065G, and PCDB0865G1_R2_00001 are all ROHS3 compliant with Moisture Sensitivity Level (MSL) rating of 1 (Unlimited). All parts are REACH Unaffected and classified under ECCN EAR99.

Q: Which substitute part should be selected for maximum current capacity?

A: S3D08065G provides the highest current rating at 23 A average rectified current, compared to 8 A for FFSB0665B, FFSB0665B-F085, and PCDB0865G1_R2_00001. Selection of S3D08065G is appropriate for applications where higher current handling or thermal margin is required within the same 650 V voltage class and TO-263 package format.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts maintain an operating junction temperature range of -55°C to 175°C, identical to the FFSB0665B base part. This specification is consistent across onsemi, SMC Diode Solutions, and Panjit International Inc. variants.

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