FFSP20120A Equivalent & Substitute Parts

Part Overview

The FFSP20120A is an active silicon carbide Schottky diode manufactured by onsemi, rated for 1200 V DC reverse voltage and 20 A average rectified current in a through-hole TO-220-2L package. This component is designed for high-voltage rectification applications requiring fast switching characteristics inherent to SiC Schottky technology. Finding equivalent and substitute parts is necessary to address supply chain flexibility, alternative sourcing options, and application-specific performance requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1200	V
Current - Average Rectified (Io)	20	A
Voltage - Forward (Vf) (Max) @ If	1.75 V @ 20 A	V
Reverse Recovery Time (trr)	0	ns
Current - Reverse Leakage @ Vr	200	µA @ 1200 V
Mounting Type	Through Hole	-
Package / Case	TO-220-2	-
Operating Temperature - Junction	-55 to 175	°C
Technology	SiC (Silicon Carbide) Schottky	-

Substitute Part Grouping Explanation

Substitution of the FFSP20120A is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 1200 V to ensure safe operation in the intended application circuit.

Current Rating: The average rectified current capacity must be equal to or greater than 20 A. Parts with lower current ratings (such as 5 A) are not direct substitutes and require circuit redesign.

Technology: All substitute parts utilize SiC Schottky technology, ensuring zero reverse recovery time and fast switching characteristics consistent with the main part.

Package Type: All substitute parts use TO-220-2 package configuration with through-hole mounting, ensuring mechanical and thermal compatibility with existing PCB layouts.

Operating Temperature Range: All substitute parts support the -55°C to 175°C junction temperature range, maintaining thermal performance across the application's operating envelope.

Compliance Standards: All substitute parts are RoHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the main part.

Parameter Comparison

Parameter	FFSP20120A (onsemi)	PCDP20120G1_T0_00001 (Panjit)	S4D20120A (SMC Diode)	IDH05G120C5XKSA1 (Infineon)
Voltage - DC Reverse (Vr) (Max)	1200 V	1200 V	1200 V	1200 V
Current - Average Rectified (Io)	20 A	20 A	20 A	5 A
Voltage - Forward (Vf) (Max) @ If	1.75 V @ 20 A	1.7 V @ 20 A	1.8 V @ 20 A	1.8 V @ 5 A
Reverse Recovery Time (trr)	0 ns	0 ns	0 ns	0 ns
Current - Reverse Leakage @ Vr	200 µA @ 1200 V	180 µA @ 1200 V	40 µA @ 1200 V	33 µA @ 1200 V
Capacitance @ Vr, F	1220 pF @ 1V, 100KHz	1040 pF @ 1V, 1MHz	721 pF @ 0V, 1MHz	301 pF @ 1V, 1MHz
Package / Case	TO-220-2	TO-220-2	TO-220-2	TO-220-2
Operating Temperature - Junction	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C
Technology	SiC Schottky	SiC Schottky	SiC Schottky	SiC Schottky
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (20 A Rating):

The PCDP20120G1_T0_00001 (Panjit International Inc.) and S4D20120A (SMC Diode Solutions) are direct electrical and mechanical substitutes for the FFSP20120A. Both parts maintain identical voltage and current ratings, operate across the same temperature range, and comply with RoHS3 standards. The PCDP20120G1_T0_00001 exhibits lower forward voltage (1.7 V vs. 1.75 V) and comparable reverse leakage characteristics. The S4D20120A demonstrates significantly lower reverse leakage (40 µA vs. 200 µA) and reduced junction capacitance, which may provide performance advantages in specific switching applications.

Limited Substitution (5 A Rating):

The IDH05G120C5XKSA1 (Infineon Technologies CoolSiC™+ series) is not a direct substitute due to its 5 A current rating, which is insufficient for applications requiring 20 A operation. This part is suitable only for circuits redesigned for lower current operation or parallel configurations. The IDH05G120C5XKSA1 offers superior reverse leakage characteristics (33 µA) and lower capacitance (301 pF), but current capacity must be verified against application requirements before selection.

Compliance Considerations:

All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory equivalence. The S4D20120A carries REACH Affected status, requiring verification against specific supply chain compliance requirements. All parts are active products with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the IDH05G120C5XKSA1 replace the FFSP20120A in my application?

A: The IDH05G120C5XKSA1 has a maximum average rectified current of 5 A, compared to the FFSP20120A's 20 A rating. Direct replacement is not possible without circuit redesign. This part is suitable only for applications requiring 5 A or lower current operation.

Q: What are the key differences between PCDP20120G1_T0_00001 and S4D20120A?

A: Both parts maintain 1200 V and 20 A ratings. The PCDP20120G1_T0_00001 has forward voltage of 1.7 V and reverse leakage of 180 µA. The S4D20120A has forward voltage of 1.8 V but significantly lower reverse leakage of 40 µA and reduced capacitance of 721 pF. Selection depends on application sensitivity to leakage current and switching speed requirements.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use the TO-220-2 package with through-hole mounting configuration, ensuring mechanical and thermal compatibility with existing PCB designs. Pin assignments and thermal interface requirements remain identical.

Q: Do all substitute parts support the same operating temperature range?

A: Yes. All substitute parts operate across the -55°C to 175°C junction temperature range, matching the FFSP20120A's thermal specifications.

Q: What is the significance of reverse recovery time being 0 ns?

A: Zero reverse recovery time is characteristic of SiC Schottky diodes and indicates instantaneous switching without charge storage effects. All listed parts, including substitutes, maintain this property, ensuring consistent fast-switching performance across all options.

Q: Are there compliance differences between substitute parts?

A: All substitute parts are RoHS3 compliant. The S4D20120A carries REACH Affected status, while the FFSP20120A and PCDP20120G1_T0_00001 are REACH Unaffected. Verify REACH compliance requirements for your specific supply chain before final selection.

Q: How do reverse leakage characteristics affect circuit performance?

A: Reverse leakage current flows when the diode is reverse-biased. Lower leakage reduces standby power consumption and heat generation. The S4D20120A (40 µA) and IDH05G120C5XKSA1 (33 µA) offer superior leakage performance compared to the FFSP20120A (200 µA), which may be advantageous in low-power or high-efficiency applications.

Q: What does capacitance variation indicate among these parts?

A: Junction capacitance affects switching speed and high-frequency performance. The S4D20120A (721 pF) and IDH05G120C5XKSA1 (301 pF) exhibit lower capacitance than the FFSP20120A (1220 pF), potentially improving performance in high-frequency switching applications. Measurement conditions vary between parts, requiring application-specific evaluation.

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