IRF2903ZSPBF N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRF2903ZSPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 75A continuous drain current at 25°C. This device is packaged in D2PAK (TO-263-3) surface mount configuration and is part of the HEXFET® series. The IRF2903ZSPBF is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	75	A (Tc)
Rds On (Max) @ 75A, 10V	2.4	mOhm
Gate Charge (Qg) @ 10V	240	nC
Power Dissipation (Max)	231	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
Vgs (Max)	±20	V

Substitute Part Grouping Explanation

Substitute parts for the IRF2903ZSPBF are selected based on the following criteria:

Primary Substitution Parameters:

Drain-to-Source Voltage (Vdss) rating must be equal to or greater than 30V
Continuous drain current (Id) must meet or exceed 75A at 25°C
Package type must be D2PAK (TO-263-3) surface mount
Gate drive voltage compatibility at 10V
Operating temperature range must encompass -55°C to 175°C
RoHS3 compliance and MSL 1 rating required

Substitutes are grouped into two categories:

Direct Voltage Class Substitutes – Parts rated at 30V Vdss with equal or higher current ratings
Higher Voltage Class Substitutes – Parts rated above 30V Vdss with enhanced current and power handling

Parameter Comparison

Parameter	IRF2903ZSPBF	STB80NF03L-04T4	STB270N4F3
Manufacturer	Infineon Technologies	STMicroelectronics	STMicroelectronics
Vdss (V)	30	30	40
Id @ 25°C (A)	75	80	160
Rds On (Max) (mOhm)	2.4 @ 75A, 10V	4.0 @ 40A, 10V	2.5 @ 80A, 10V
Gate Charge (nC)	240 @ 10V	110 @ 4.5V	150 @ 10V
Power Dissipation (W)	231	300	330
Operating Temp (°C)	-55 to 175	-60 to 175	-55 to 175
Package	D2PAK	D2PAK	D2PAK
Product Status	Discontinued	Obsolete	Active
RoHS3 Compliant	Yes	Yes	Yes
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

STB80NF03L-04T4 (STMicroelectronics STripFET™ II)

This part provides direct voltage class substitution at 30V Vdss with 80A continuous drain current, exceeding the IRF2903ZSPBF requirement of 75A. The D2PAK package is identical. However, this part is classified as Obsolete, limiting long-term procurement viability. It maintains full RoHS3 compliance and MSL 1 rating. Selection of this substitute is appropriate only for short-term applications or inventory management where discontinuation risk is acceptable.

STB270N4F3 (STMicroelectronics STripFET™ III)

This part operates at 40V Vdss, providing 10V margin above the IRF2903ZSPBF specification. It delivers 160A continuous drain current, significantly exceeding the 75A requirement. The D2PAK package matches the original. This part is classified as Active with AEC-Q101 automotive qualification, ensuring long-term availability and supply chain stability. Higher voltage rating and current capacity provide design margin for thermal and electrical stress. RoHS3 and MSL 1 compliance are maintained. This substitute is recommended for new designs and applications requiring extended product lifecycle support.

Frequently Asked Questions (FAQ)

Q: Can STB80NF03L-04T4 be used as a direct replacement for IRF2903ZSPBF?

A: Yes, STB80NF03L-04T4 meets the electrical specifications of IRF2903ZSPBF with matching 30V Vdss rating and higher 80A current capacity. The D2PAK package is identical. However, this part is classified as Obsolete, which may impact future procurement availability.

Q: What is the advantage of using STB270N4F3 over STB80NF03L-04T4?

A: STB270N4F3 is classified as Active with AEC-Q101 automotive qualification, ensuring long-term supply chain availability. It provides higher voltage margin (40V vs. 30V) and significantly higher current capacity (160A vs. 80A), offering greater design flexibility and thermal headroom. The D2PAK package remains compatible.

Q: Are all substitute parts in the same D2PAK package?

A: Yes. Both STB80NF03L-04T4 and STB270N4F3 use D2PAK (TO-263-3) surface mount packaging, identical to the IRF2903ZSPBF. PCB layout and thermal management considerations remain consistent.

Q: Do the substitute parts meet RoHS3 and MSL requirements?

A: Yes. Both STB80NF03L-04T4 and STB270N4F3 are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the IRF2903ZSPBF specifications.

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

A: STB80NF03L-04T4 operates from -60°C to 175°C (TJ), and STB270N4F3 operates from -55°C to 175°C (TJ). Both exceed the IRF2903ZSPBF range of -55°C to 175°C (TJ).

Q: How do gate charge specifications compare?

A: IRF2903ZSPBF has 240 nC gate charge at 10V. STB80NF03L-04T4 has 110 nC at 4.5V, and STB270N4F3 has 150 nC at 10V. Lower gate charge reduces driver power requirements and switching losses.

Q: Is STB270N4F3 suitable for applications designed for 30V operation?

A: Yes. STB270N4F3 is rated for 40V Vdss, which is compatible with 30V applications. The higher voltage rating provides additional safety margin and does not degrade performance in lower voltage circuits.

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