FSV1045V Equivalent & Substitute Parts

Part Overview

The FSV1045V is a Schottky rectifier diode manufactured by onsemi, rated for 45 V DC reverse voltage and 10 A average rectified current in a surface mount TO-277-3 package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original component is no longer available or procurement is limited.

Key Parameters

Parameter	FSV1045V Specification
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	10 A
Voltage - Forward (Vf) (Max) @ If	440 mV @ 10 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	220 µA @ 45 V
Capacitance @ Vr, F	820 pF @ 4 V, 1 MHz
Technology	Schottky
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

Substitution of the FSV1045V is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 45 V
Current - Average Rectified (Io): Must equal or exceed 10 A
Technology: Schottky diode
Mounting Type: Surface Mount
Package / Case: TO-277 family (3-PowerDFN)
Operating Temperature Range: Must support -55°C ~ 150°C minimum

Secondary Parameters for Compatibility Assessment:

Voltage - Forward (Vf) (Max) @ If: Lower values indicate improved efficiency
Current - Reverse Leakage @ Vr: Lower values indicate better performance
Speed: Fast Recovery ≤ 500 ns required
RoHS and REACH compliance status

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents: Parts meeting all critical parameters with identical or superior electrical characteristics and active product status.
Similar Parametric Equivalents: Parts meeting all critical parameters with minor variations in secondary characteristics or different package variants within the TO-277 family.
Parametric Equivalents: Parts meeting all critical parameters with identical electrical specifications but different package designations.

Parameter Comparison

Parameter	FSV1045V (onsemi)	DST1045S (Littelfuse)	SS10P4-M3/87A (Vishay)	PMEG045T050EPDZ (Nexperia)	SS10PH45-M3/86A (Vishay)	SVM1045V_R2_00001 (Panjit)	SVM1045V2B_R2_00001 (Panjit)	SVM1045V2_R1_00001 (Panjit)
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	40 V	45 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io)	10 A	10 A	10 A	5 A	10 A	10 A	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	440 mV @ 10 A	570 mV @ 10 A	560 mV @ 10 A	465 mV @ 5 A	720 mV @ 10 A	470 mV @ 10 A	440 mV @ 10 A	440 mV @ 10 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	220 µA @ 45 V	800 µA @ 45 V	800 µA @ 40 V	44 µA @ 45 V	80 µA @ 45 V	250 µA @ 45 V	220 µA @ 45 V	220 µA @ 45 V
Capacitance @ Vr, F	820 pF @ 4 V, 1 MHz	639 pF @ 5 V, 1 MHz	Not specified	830 pF @ 1 V, 1 MHz	270 pF @ 4 V, 1 MHz	Not specified	860 pF @ 4 V, 1 MHz	860 pF @ 4 V, 1 MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	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	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	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Parametric Equivalents (Highest Compatibility):

The parts SVM1045V2B_R2_00001 and SVM1045V2_R1_00001 (both Panjit International Inc.) are parametric equivalents with identical electrical specifications to the FSV1045V. Both maintain 45 V reverse voltage, 10 A current rating, 440 mV forward voltage at 10 A, and 220 µA reverse leakage at 45 V. These parts are in active product status with ROHS3 compliance and unlimited moisture sensitivity level. SVM1045V2_R1_00001 offers significantly higher inventory availability (20,400 pcs) compared to SVM1045V2B_R2_00001 (5,200 pcs). Both support the required operating temperature range of -55°C to 150°C.

Tier 2 - Direct Manufacturer Equivalents (High Compatibility):

DST1045S (Littelfuse Inc.) meets all critical electrical parameters with 45 V reverse voltage and 10 A current rating. This part is in active product status with ROHS3 compliance. The forward voltage specification of 570 mV at 10 A is higher than the FSV1045V (440 mV), and reverse leakage is elevated at 800 µA compared to 220 µA. Operating temperature range matches at -55°C to 150°C. Inventory availability is strong at 15,200 pcs. The TO-277B package variant may require PCB layout verification for mechanical compatibility.

Tier 3 - Similar Parametric Equivalents (Conditional Compatibility):

SS10PH45-M3/86A (Vishay General Semiconductor - Diodes Division) meets all critical electrical parameters with 45 V reverse voltage and 10 A current rating in active product status. This part exhibits superior reverse leakage performance at 80 µA and significantly lower capacitance at 270 pF. However, forward voltage is substantially higher at 720 mV at 10 A, which may impact circuit efficiency. Operating temperature range extends to 175°C, providing thermal margin. Inventory is abundant at 30,400 pcs. The eSMP® series designation and TO-277A package variant require mechanical compatibility assessment.

SS10P4-M3/87A (Vishay General Semiconductor - Diodes Division) has a reduced reverse voltage rating of 40 V, which is below the FSV1045V specification of 45 V. This part is not suitable for direct substitution in applications requiring the full 45 V rating. Current rating and other parameters are compatible, but the voltage limitation disqualifies this option for equivalent functionality.

Tier 4 - Similar Parametric Equivalents with Current Derating (Limited Compatibility):

PMEG045T050EPDZ (Nexperia USA Inc.) maintains 45 V reverse voltage but has a reduced current rating of 5 A, which is half the FSV1045V specification of 10 A. This part is in active product status with ROHS3 compliance and includes automotive-grade qualification (AEC-Q101). Forward voltage at 5 A is 465 mV, and reverse leakage is excellent at 44 µA. Operating temperature extends to 175°C. The CFP15 package is a TO-277 variant. This part is suitable only for applications where the 5 A current limit is acceptable or where current derating is permissible.

SVM1045V_R2_00001 (Panjit International Inc.) meets all critical electrical parameters with 45 V reverse voltage and 10 A current rating in active product status. Forward voltage is 470 mV at 10 A, and reverse leakage is 250 µA. Operating temperature range is -55°C to 150°C. Inventory availability is moderate at 5,724 pcs. The TO-277 package designation requires mechanical compatibility verification.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the FSV1045V. Moisture sensitivity level is uniformly rated at MSL 1 (Unlimited) across all options. All parts carry the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Frequently Asked Questions (FAQ)

Q: Can SS10P4-M3/87A be used as a direct replacement for FSV1045V?

A: No. While SS10P4-M3/87A meets the 10 A current requirement and shares the same package family, its reverse voltage rating of 40 V is below the FSV1045V specification of 45 V. Direct substitution would compromise circuit protection and reliability in applications requiring the full 45 V rating.

Q: What is the difference between the TO-277-3, TO-277B, and TO-277A package variants?

A: All three are members of the TO-277 family with 3-PowerDFN case style. The designations (TO-277-3, TO-277B, TO-277A) represent supplier-specific package variants. While mechanically similar, PCB footprint and thermal characteristics may differ slightly. Verification against your specific PCB design is required before substitution.

Q: Are the Panjit SVM1045V2B_R2_00001 and SVM1045V2_R1_00001 parts interchangeable?

A: Yes. Both parts are parametric equivalents with identical electrical specifications: 45 V reverse voltage, 10 A current, 440 mV forward voltage at 10 A, and 220 µA reverse leakage. The primary difference is package designation (TO-277B versus TO-277) and inventory availability. SVM1045V2_R1_00001 offers significantly higher stock (20,400 pcs versus 5,200 pcs).

Q: Why does PMEG045T050EPDZ have a lower current rating than FSV1045V?

A: PMEG045T050EPDZ is rated for 5 A average rectified current, half the FSV1045V specification of 10 A. This reflects different die design and thermal management characteristics. This part is suitable only for applications where the 5 A current limit is acceptable or where the circuit can operate with reduced current capacity.

Q: What is the significance of the forward voltage differences between substitute parts?

A: Forward voltage (Vf) directly affects power dissipation and circuit efficiency. FSV1045V specifies 440 mV at 10 A. Substitute parts with higher Vf values (such as SS10PH45-M3/86A at 720 mV) will dissipate more power as heat. In high-current or thermally constrained applications, this difference may require thermal design reassessment.

Q: Are all substitute parts suitable for automotive applications?

A: Only PMEG045T050EPDZ carries automotive-grade qualification (AEC-Q101). Other substitute parts are industrial-grade components. If automotive qualification is required, PMEG045T050EPDZ is the only option, subject to its 5 A current limitation.

Q: What does "Not For New Designs" status mean for FSV1045V?

A: This designation indicates that onsemi has discontinued the FSV1045V for new product development. The part remains available for existing applications and legacy system support, but new designs should incorporate one of the active substitute parts listed in this reference.

Q: How do reverse leakage specifications affect component selection?

A: Reverse leakage current (Ir) represents unwanted current flow when the diode is reverse-biased. Lower values indicate better performance and reduced power loss. FSV1045V specifies 220 µA at 45 V. SS10PH45-M3/86A offers superior performance at 80 µA, while DST1045S and SS10P4-M3/87A are higher at 800 µA. In precision or low-power applications, lower leakage is preferable.

Q: Can I use a substitute part with a higher operating temperature range?

A: Yes. Parts with extended temperature ranges (such as SS10PH45-M3/86A and PMEG045T050EPDZ rated to 175°C versus FSV1045V at 150°C) provide additional thermal margin and are suitable for applications with higher ambient or junction temperatures. This is a beneficial characteristic for substitution.

Q: What inventory considerations should guide my selection?

A: SVM1045V2_R1_00001 offers the highest inventory at 20,400 pcs, followed by SS10PH45-M3/86A at 30,400 pcs. If long-term supply security is critical, these options provide the best availability. DST1045S (15,200 pcs) and SVM1045V2B_R2_00001 (5,200 pcs) offer moderate to lower availability.

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