IRF2804SPBF N-Channel 40V 75A MOSFET Equivalent & Substitute Parts

Part Overview

The IRF2804SPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage and 75A continuous drain current in a D2PAK surface mount package. This device is discontinued at DiGi Electronics and no longer in active production. Due to its discontinued status, equivalent substitute parts with compatible electrical and mechanical specifications are necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	75	A
On-State Resistance (Rds On Max) @ Id, Vgs	2 mOhm @ 75A, 10V	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ Id	4	V @ 250µA
Gate Charge (Qg Max) @ Vgs	240	nC @ 10V
Power Dissipation (Max)	300	W
Operating Temperature Range	-55 to 175	°C
Package Type	D2PAK (TO-263-3)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the IRF2804SPBF is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain-to-Source Voltage (Vdss): Must equal or exceed 40V
Package Type: Must be D2PAK (TO-263-3) for mechanical and thermal compatibility
Operating Temperature Range: Must support -55°C to 175°C
RoHS Compliance: Must maintain ROHS3 Compliant status

Functional Compatibility Criteria:

Continuous drain current rating must support the application's current requirements
On-state resistance (Rds On) characteristics must be compatible with thermal and efficiency requirements
Gate charge and threshold voltage must be within acceptable switching performance parameters

The substitute parts listed below meet these core compatibility requirements while offering variations in current rating and on-state resistance that allow for design flexibility based on specific application demands.

Parameter Comparison

Parameter	IRF2804SPBF	BUK661R9-40C,118	PSMN1R1-40BS,118	PSMN2R2-40BS,118	STB120N4F6	STB270N4F3
Manufacturer	Infineon	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	STMicroelectronics	STMicroelectronics
Vdss (V)	40	40	40	40	40	40
Id @ 25°C (A)	75	120	120	100	80	160
Rds On Max @ 10V (mOhm)	2.0 @ 75A	1.9 @ 25A	1.3 @ 25A	2.2 @ 25A	4.0 @ 40A	2.5 @ 80A
Vgs(th) Max (V)	4 @ 250µA	2.8 @ 1mA	4 @ 1mA	4 @ 1mA	4 @ 250µA	4 @ 250µA
Qg Max @ 10V (nC)	240	260	136	130	65	150
Power Dissipation Max (W)	300	306	306	306	110	330
Operating Temp Range (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	D2PAK	D2PAK	D2PAK	D2PAK	D2PAK	D2PAK
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3
Product Status	Discontinued	Obsolete	Active	Active	Active	Active
Automotive Grade	—	Yes (AEC-Q101)	—	—	Yes (AEC-Q101)	Yes (AEC-Q101)

Engineering Selection Recommendations

For Direct Current Rating Match (75A Range): PSMN2R2-40BS,118 provides the closest current rating at 100A with active product status. This part maintains the 40V Vdss specification and D2PAK package compatibility. The on-state resistance of 2.2 mOhm at 25A, 10V is comparable to the IRF2804SPBF specification of 2.0 mOhm at 75A, 10V. This part is actively manufactured and stocked.

For Higher Current Capability (120A Range): PSMN1R1-40BS,118 offers 120A continuous drain current with superior on-state resistance of 1.3 mOhm at 25A, 10V and lower gate charge of 136 nC. This part is actively produced and provides enhanced performance headroom. BUK661R9-40C,118 also provides 120A capability with automotive AEC-Q101 qualification, though it carries obsolete product status.

For Maximum Current Capacity (160A Range): STB270N4F3 delivers 160A continuous drain current with 2.5 mOhm on-state resistance and automotive AEC-Q101 qualification. This part is actively manufactured and suitable for applications requiring higher current margins.

For Reduced Power Dissipation Applications: STB120N4F6 provides 80A continuous drain current with the lowest gate charge of 65 nC and lowest input capacitance at 3850 pF. This part carries automotive AEC-Q101 qualification and active product status, making it suitable for switching-speed-critical applications.

All recommended substitutes maintain ROHS3 compliance and the -55°C to 175°C operating temperature range of the original IRF2804SPBF.

Frequently Asked Questions (FAQ)

Q: Can PSMN1R1-40BS,118 directly replace IRF2804SPBF in existing designs?

A: PSMN1R1-40BS,118 is mechanically and electrically compatible as a direct substitute. Both devices use D2PAK packaging, support 40V Vdss, and operate across -55°C to 175°C. The higher current rating (120A vs. 75A) and lower on-state resistance (1.3 mOhm vs. 2.0 mOhm) provide improved performance margins. Thermal management and PCB layout remain compatible due to identical package geometry.

Q: What is the difference between the Nexperia and STMicroelectronics substitute options?

A: Nexperia parts (PSMN1R1-40BS,118 and PSMN2R2-40BS,118) offer lower on-state resistance and gate charge characteristics optimized for efficiency. STMicroelectronics parts (STB120N4F6 and STB270N4F3) include automotive AEC-Q101 qualification and are designed for automotive-grade applications. Selection depends on whether automotive qualification is required for the end application.

Q: Why does STB120N4F6 have lower power dissipation (110W) compared to other options?

A: STB120N4F6 is specified with lower power dissipation due to its lower continuous drain current rating (80A) and different thermal design. This part is optimized for applications where switching speed and gate charge efficiency are prioritized over maximum current capacity. The lower power dissipation reflects the reduced thermal load at rated current.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the original IRF2804SPBF specification. All parts are also REACH Unaffected and carry EAR99 ECCN classification.

Q: Which substitute part has the lowest gate charge?

A: STB120N4F6 has the lowest gate charge at 65 nC @ 10V, compared to 240 nC for the IRF2804SPBF. Lower gate charge reduces switching losses and improves switching speed performance in high-frequency applications.

Q: Can I use STB270N4F3 in place of IRF2804SPBF if my application requires higher current capacity?

A: Yes. STB270N4F3 is mechanically and electrically compatible with identical D2PAK packaging and 40V Vdss rating. The 160A continuous drain current provides significant current margin above the original 75A specification. This part is actively manufactured with automotive AEC-Q101 qualification and active product status.

Q: What is the inventory status of these substitute parts?

A: PSMN1R1-40BS,118 has the highest inventory at 4711 pieces. PSMN2R2-40BS,118 has 632 pieces. STB270N4F3 has 7230 pieces. STB120N4F6 has 15126 pieces. BUK661R9-40C,118 has 2313 pieces. All parts are listed as new original stock.

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