FSV20120V Equivalent & Substitute Parts

Part Overview

The FSV20120V is a Schottky rectifier diode manufactured by onsemi, rated for 120V DC reverse voltage with 20A average rectified current in a surface mount TO-277-3 package. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product portfolio. Equivalent and substitute parts are necessary for applications requiring continued support, design flexibility, or inventory optimization while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	120 V
Current - Average Rectified (Io)	20A
Voltage - Forward (Vf) (Max) @ If	790 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	35 µA @ 120 V
Mounting Type	Surface Mount
Package / Case	TO-277, 3-PowerDFN
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the FSV20120V are classified into two categories based on electrical parameter alignment:

Parametric Equivalents (Full Electrical Match): Parts that maintain identical or equivalent electrical specifications across all critical parameters including reverse voltage (120V), average rectified current (20A), forward voltage drop (790 mV @ 20A), reverse leakage current (35 µA @ 120V), and operating temperature range (-55°C ~ 150°C). These parts are interchangeable from an electrical performance standpoint.

Similar Substitutes (Partial Electrical Match): Parts that share the same reverse voltage rating (120V) and package family (TO-277) but differ in current-carrying capacity or other secondary parameters. These require application-level verification for current requirements.

The substitution logic is based strictly on the following parameters:

Voltage - DC Reverse (Vr) (Max)
Current - Average Rectified (Io)
Voltage - Forward (Vf) (Max) @ If
Current - Reverse Leakage @ Vr
Operating Temperature - Junction
Package / Case compatibility
RoHS and compliance status

Parameter Comparison

Parameter	FSV20120V (onsemi)	SVT20120U_R1_00001 (Panjit)	SVT20120UB_R2_00001 (Panjit)	V10PM12-M3/87A (Vishay)
Voltage - DC Reverse (Vr) (Max)	120 V	120 V	120 V	120 V
Current - Average Rectified (Io)	20A	20A	20A	3.9A
Voltage - Forward (Vf) (Max) @ If	790 mV @ 20 A	790 mV @ 20 A	790 mV @ 20 A	830 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	35 µA @ 120 V	35 µA @ 120 V	35 µA @ 120 V	400 µA @ 120 V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN	TO-277, 3-PowerDFN
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-40°C ~ 150°C
Product Status	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

SVT20120U_R1_00001 and SVT20120UB_R2_00001 (both Panjit International Inc.) are parametric equivalents to the FSV20120V. These parts maintain identical electrical specifications across all critical parameters: 120V reverse voltage, 20A average rectified current, 790 mV forward voltage drop at 20A, 35 µA reverse leakage current, and -55°C to 150°C operating temperature range. Both parts are Active status products with ROHS3 compliance. The primary distinction between these two Panjit variants is the supplier device package designation (TO-277 versus TO-277B), which represents internal packaging variations that do not affect electrical performance or PCB-level compatibility.

For Current-Limited Applications:

V10PM12-M3/87A (Vishay General Semiconductor - Diodes Division) is a similar substitute suitable only for applications where the average rectified current requirement does not exceed 3.9A. This part shares the 120V reverse voltage rating and TO-277 package family but is rated for significantly lower current capacity (3.9A versus 20A). The forward voltage specification differs (830 mV @ 10A versus 790 mV @ 20A), and reverse leakage current is higher (400 µA @ 120V versus 35 µA @ 120V). Additionally, the operating temperature range is narrower (-40°C to 150°C versus -55°C to 150°C). This part is Active status with ROHS3 compliance.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and EAR99 export classification consistent with the original FSV20120V. No compliance barriers exist for substitution.

Frequently Asked Questions (FAQ)

Q: Can SVT20120U_R1_00001 and SVT20120UB_R2_00001 be used interchangeably with FSV20120V?

A: Yes. Both Panjit parts are parametric equivalents with identical electrical specifications. The difference between TO-277 and TO-277B designations refers to supplier device package variations that do not affect electrical performance or PCB footprint compatibility.

Q: Is V10PM12-M3/87A a direct replacement for FSV20120V?

A: No. While V10PM12-M3/87A shares the same 120V reverse voltage rating and TO-277 package family, it is rated for only 3.9A average rectified current compared to the FSV20120V's 20A rating. This part is suitable only for applications with lower current requirements. Additionally, reverse leakage current is higher (400 µA versus 35 µA), and the operating temperature range is narrower (-40°C to 150°C versus -55°C to 150°C).

Q: What are the critical parameters for determining substitution compatibility?

A: The critical parameters are: Voltage - DC Reverse (Vr) (Max), Current - Average Rectified (Io), Voltage - Forward (Vf) (Max) @ If, Current - Reverse Leakage @ Vr, Operating Temperature - Junction range, and Package / Case designation. All substitute parts must maintain or exceed the original specifications in these parameters.

Q: Are all substitute parts currently in active production?

A: SVT20120U_R1_00001, SVT20120UB_R2_00001, and V10PM12-M3/87A are all Active status products. The original FSV20120V is classified as Not For New Designs, which is why equivalent substitutes are necessary for ongoing applications.

Q: Do the substitute parts have the same compliance certifications as FSV20120V?

A: Yes. All substitute parts are ROHS3 compliant, MSL Level 1 (Unlimited), REACH Unaffected, and classified as EAR99 for export purposes, matching the original FSV20120V specifications.

Q: What is the difference between TO-277 and TO-277A package designations?

A: TO-277A (SMPC) is the supplier device package designation for V10PM12-M3/87A. TO-277 and TO-277B are designations for the Panjit parts. These represent variations in the physical package configuration and thermal characteristics. Compatibility must be verified against specific PCB footprint requirements and thermal management needs.

Q: Can FSV20120V be used in new designs?

A: No. FSV20120V is classified as Not For New Designs. For new applications, SVT20120U_R1_00001 or SVT20120UB_R2_00001 are the recommended choices as they are Active status products with identical electrical specifications.

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