FDP045N10A N-Channel 100V 120A MOSFET Equivalent & Substitute Parts

Part Overview

The FDP045N10A is an N-Channel MOSFET manufactured by onsemi in the PowerTrench® series, rated for 100V drain-to-source voltage and 120A continuous drain current at 25°C. The device is packaged in TO-220-3 through-hole configuration with a maximum power dissipation of 263W at the case temperature. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging and product status options.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current (Id) @ 25°C	120	A
On-State Resistance (Rds On) @ 100A, 10V	4.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	74	nC
Power Dissipation (Max)	263	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the FDP045N10A is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 100V
Continuous Drain Current (Id) @ 25°C: Must equal or exceed 120A
On-State Resistance (Rds On): Must not exceed 4.5mOhm at rated conditions to maintain thermal performance
Gate Threshold Voltage (Vgs(th)): Must fall within ±20V maximum gate voltage specification
Package/Case: Must be TO-220-3 or compatible through-hole TO-220 variant
Operating Temperature Range: Must support -55°C to 175°C minimum

Substitution Categories:

Direct Equivalent: Parts with identical electrical specifications and active product status. FDP045N10A-F102 is a direct equivalent, differing only in packaging format (Tube) and product status (Active), with full RoHS3 compliance.

Compatible Substitutes: Parts meeting or exceeding all primary electrical parameters with compatible packaging. These include IRFB4110PBF, IRF100B201, IRFB4310PBF, and PSMN4R3-100PS,127. These devices maintain 100V Vdss and 120A or greater continuous drain current ratings with equivalent or superior thermal performance.

Similar Performance Alternatives: Parts with 100V Vdss but reduced continuous drain current (100A) or different gate charge characteristics. IPP045N10N3GXKSA1 and PSMN5R6-100PS,127 fall into this category and are suitable only where the 120A requirement can be reduced to 100A.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg @ 10V (nC)	Power Dissipation (W)	Package	Product Status
FDP045N10A	onsemi	100	120	4.5	74	263	TO-220-3	Obsolete
FDP045N10A-F102	onsemi	100	120	4.5	74	263	TO-220-3	Active
IRFB4110PBF	Infineon Technologies	100	120	4.5	210	370	TO-220-3	Active
IRFB4310PBF	Infineon Technologies	100	130	7.0	250	300	TO-220-3	Active
IRF100B201	Infineon Technologies	100	192	4.2	255	441	TO-220-3	Active
IPP045N10N3GXKSA1	Infineon Technologies	100	100	4.5	117	214	TO-220-3	Active
IRLB4030PBF	Infineon Technologies	100	180	4.3	130	370	TO-220-3	Active
PSMN4R3-100PS,127	Nexperia USA Inc.	100	120	4.3	170	338	TO-220-3	Obsolete
PSMN5R0-100PS,127	Nexperia USA Inc.	100	120	5.0	170	338	TO-220-3	Obsolete
PSMN5R6-100PS,127	Nexperia USA Inc.	100	100	5.6	141	306	TO-220-3	Obsolete

Engineering Selection Recommendations

Recommended Primary Substitute: FDP045N10A-F102

FDP045N10A-F102 is the optimal substitute for the obsolete FDP045N10A. This part is manufactured by onsemi in the same PowerTrench® series and provides identical electrical specifications: 100V Vdss, 120A continuous drain current, 4.5mOhm Rds On, and 263W power dissipation. The primary distinction is product status—FDP045N10A-F102 is active and carries RoHS3 compliance certification, ensuring long-term availability and regulatory alignment. Packaging is supplied in Tube format. This part requires no circuit redesign and maintains full pin and thermal compatibility.

Recommended Active Substitutes for Extended Thermal Margin:

IRFB4110PBF (Infineon Technologies, HEXFET® series) matches the FDP045N10A electrical specification exactly at 100V/120A/4.5mOhm but provides 370W power dissipation versus 263W, offering 41% additional thermal headroom. Product status is active with RoHS3 compliance. Gate charge is elevated at 210nC versus 74nC, which may increase switching losses in high-frequency applications.

IRF100B201 (Infineon Technologies, HEXFET®/StrongIRFET™ series) exceeds FDP045N10A specifications with 192A continuous drain current and 441W power dissipation while maintaining 100V Vdss and 4.2mOhm Rds On. This part is suitable for applications requiring higher current capacity or thermal margin. Product status is active with RoHS3 compliance.

IRLB4030PBF (Infineon Technologies, HEXFET® series) provides 180A continuous drain current and 370W power dissipation at 100V Vdss with 4.3mOhm Rds On. Gate charge is reduced to 130nC at 4.5V drive voltage, reducing switching losses. Product status is active with RoHS3 compliance.

Reduced Current Alternatives:

IPP045N10N3GXKSA1 (Infineon Technologies, OptiMOS™ series) is suitable only where continuous drain current can be reduced to 100A. This part maintains 100V Vdss and 4.5mOhm Rds On with lower gate charge (117nC) and power dissipation (214W). Product status is active with RoHS3 compliance.

Obsolete Substitutes (Not Recommended for New Designs):

PSMN4R3-100PS,127, PSMN5R0-100PS,127, and PSMN5R6-100PS,127 (Nexperia USA Inc.) are classified as obsolete. While PSMN4R3-100PS,127 and PSMN5R0-100PS,127 meet the 100V/120A specification, their obsolete status creates procurement risk. PSMN5R6-100PS,127 is limited to 100A continuous drain current. These parts are not recommended for new designs or long-term production.

Frequently Asked Questions (FAQ)

Q: Can FDP045N10A-F102 be used as a direct replacement for FDP045N10A?

A: Yes. FDP045N10A-F102 is a direct equivalent with identical electrical specifications (100V, 120A, 4.5mOhm Rds On, 263W power dissipation) and compatible TO-220-3 through-hole packaging. The primary difference is product status—FDP045N10A-F102 is active and RoHS3 compliant, whereas FDP045N10A is obsolete. No circuit modifications are required.

Q: What is the difference between TO-220-3 and TO-220AB packaging?

A: Both are through-hole packages with three leads suitable for TO-220 footprints. TO-220-3 and TO-220AB are mechanically and electrically compatible for PCB mounting. Parts listed with either designation can be used interchangeably on standard TO-220 footprints.

Q: Why do some substitute parts have higher gate charge (Qg)?

A: Gate charge affects switching speed and driver power requirements. IRFB4110PBF has 210nC versus FDP045N10A's 74nC. Higher gate charge increases switching losses in high-frequency applications but does not affect DC performance. Verify driver capability before substitution in switching applications above 100kHz.

Q: Can IRFB4310PBF replace FDP045N10A if continuous drain current is only 130A?

A: IRFB4310PBF exceeds FDP045N10A specifications with 130A continuous drain current at 100V. However, Rds On is 7mOhm at 75A versus FDP045N10A's 4.5mOhm at 100A, resulting in higher conduction losses. This part is suitable only if the application can tolerate increased on-state resistance or if thermal margin is not critical.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed (FDP045N10A-F102, IRFB4110PBF, IRFB4310PBF, IRF100B201, IPP045N10N3GXKSA1, IRLB4030PBF) carry RoHS3 compliance certification. Obsolete parts (PSMN4R3-100PS,127, PSMN5R0-100PS,127, PSMN5R6-100PS,127) also carry RoHS3 compliance but are not recommended due to product status.

Q: What is the minimum continuous drain current requirement for a valid substitute?

A: A valid substitute must support at least 120A continuous drain current at 25°C to match FDP045N10A specifications. Parts rated for 100A (IPP045N10N3GXKSA1, PSMN5R6-100PS,127) are suitable only for applications where the design can be modified to operate at reduced current levels.

Q: Can I use IRF100B201 in a space-constrained application?

A: IRF100B201 is packaged in TO-220AB, which is mechanically compatible with TO-220-3 footprints. However, IRF100B201 has significantly higher gate charge (255nC) and input capacitance (9500pF), which may require driver circuit modifications. Verify driver specifications before substitution.

Q: Why is PSMN5R0-100PS,127 not recommended despite meeting electrical specifications?

A: PSMN5R0-100PS,127 is classified as obsolete, creating long-term procurement risk. While it meets 100V/120A specifications, active alternatives with superior availability and regulatory compliance (FDP045N10A-F102, IRFB4110PBF) are preferred for new designs and production continuity.

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

A: All substitute parts listed support the full operating temperature range of -55°C to 175°C (TJ), matching FDP045N10A specifications. This range is suitable for industrial and automotive applications.

Q: How does on-state resistance (Rds On) affect circuit performance?

A: Lower Rds On reduces conduction losses and heat generation. FDP045N10A and FDP045N10A-F102 both specify 4.5mOhm at 100A/10V. IRFB4110PBF matches this specification. Higher Rds On values (IRFB4310PBF at 7mOhm, PSMN5R0-100PS,127 at 5mOhm) increase power dissipation proportionally. Select substitutes with Rds On equal to or lower than the original specification to maintain thermal performance.

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