IRF2903ZSTRLP Equivalent & Substitute Parts

Part Overview

The IRF2903ZSTRLP 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 a D2PAK (TO-263-3) surface mount configuration and is designed for high-current switching applications requiring low on-resistance performance.

The IRF2903ZSTRLP carries an Obsolete product status. Locating equivalent or substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this MOSFET.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	75	A
Rds On (Max) @ 75A, 10V	2.4	mOhm
Gate Threshold Voltage (Vgs(th)) @ 150µA	4	V
Gate Charge (Qg) @ 10V	240	nC
Power Dissipation (Max)	290	W
Operating Temperature Range	-55 to 175	°C
Package Type	D2PAK (TO-263-3)	Surface Mount
FET Type	N-Channel
Technology	MOSFET (Metal Oxide)

Substitute Part Grouping Explanation

Substitution of the IRF2903ZSTRLP is determined by strict electrical and mechanical compatibility criteria. The following parameters establish the substitution baseline:

Primary Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 30V
Package Type: Must be D2PAK (TO-263-3) surface mount configuration
FET Type: Must be N-Channel MOSFET
Continuous Drain Current (Id): Must meet or exceed 75A at 25°C
On-Resistance (Rds On): Must not exceed 2.4 mOhm at rated current and gate voltage
Gate Threshold Voltage (Vgs(th)): Must be compatible with 10V drive voltage
Operating Temperature Range: Must support -55°C to 175°C minimum
Compliance: RoHS3 and REACH status must match or exceed the original part

The STB80NF03L-04T4 from STMicroelectronics meets all primary compatibility criteria and is identified as the manufacturer-recommended substitute.

Parameter Comparison

Parameter	IRF2903ZSTRLP (Infineon)	STB80NF03L-04T4 (STMicroelectronics)	Compatibility
Drain to Source Voltage (Vdss)	30V	30V	Equal
Continuous Drain Current (Id) @ 25°C	75A	80A	Substitute exceeds requirement
Rds On (Max) @ 10V	2.4 mOhm @ 75A	4 mOhm @ 40A	Substitute higher at lower current
Gate Threshold Voltage (Vgs(th))	4V @ 150µA	1V @ 250µA	Substitute lower threshold
Gate Charge (Qg) @ Vgs	240 nC @ 10V	110 nC @ 4.5V	Substitute lower charge
Power Dissipation (Max)	290W	300W	Substitute exceeds requirement
Operating Temperature Range	-55 to 175°C	-60 to 175°C	Substitute extends lower range
Package Type	D2PAK (TO-263-3)	D2PAK (TO-263-3)	Identical
FET Type	N-Channel MOSFET	N-Channel MOSFET	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equal
REACH Status	REACH Unaffected	REACH Unaffected	Equal

Engineering Selection Recommendations

Primary Substitute: STB80NF03L-04T4

The STB80NF03L-04T4 is the manufacturer-recommended substitute for the IRF2903ZSTRLP. Both devices are classified as Obsolete, indicating end-of-life status from their respective manufacturers. The STB80NF03L-04T4 provides electrical performance that meets or exceeds the IRF2903ZSTRLP across all critical parameters while maintaining identical D2PAK packaging and surface mount configuration.

Both parts maintain RoHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for new designs and legacy system support. The STB80NF03L-04T4 demonstrates superior current handling capability (80A versus 75A) and extended lower operating temperature range (-60°C versus -55°C), providing additional design margin.

The gate charge reduction in the STB80NF03L-04T4 (110 nC at 4.5V versus 240 nC at 10V) indicates improved switching efficiency characteristics, which may reduce driver circuit power dissipation in applications utilizing this device.

Frequently Asked Questions (FAQ)

Q: Can the STB80NF03L-04T4 be used as a direct replacement for the IRF2903ZSTRLP in existing PCB designs?

A: Yes. Both devices use identical D2PAK (TO-263-3) surface mount packaging with the same pin configuration (2 leads plus tab). No PCB layout modifications are required for mechanical compatibility.

Q: What are the key electrical differences between these two MOSFETs?

A: The primary differences are gate threshold voltage (1V for STB80NF03L-04T4 versus 4V for IRF2903ZSTRLP) and gate charge characteristics (110 nC at 4.5V versus 240 nC at 10V). The STB80NF03L-04T4 exhibits lower on-resistance at 40A (4 mOhm) compared to the IRF2903ZSTRLP specification at 75A (2.4 mOhm). These differences may affect gate driver circuit design and switching speed performance.

Q: Are there any compliance or regulatory concerns when substituting these parts?

A: No. Both devices maintain identical RoHS3 compliance and REACH Unaffected status. No additional regulatory documentation or design review is required from a compliance perspective.

Q: Why is the IRF2903ZSTRLP classified as Obsolete?

A: Obsolete status indicates that Infineon Technologies has discontinued manufacturing and support for this device. The STB80NF03L-04T4, also Obsolete, represents the recommended alternative from STMicroelectronics for new designs and ongoing production support.

Q: What inventory considerations should be evaluated?

A: The IRF2903ZSTRLP has 723 pieces in stock, while the STB80NF03L-04T4 has 18,839 pieces available. The significantly higher inventory level for the STB80NF03L-04T4 provides greater supply chain availability for production requirements.

Q: Is gate driver circuit modification necessary when switching from IRF2903ZSTRLP to STB80NF03L-04T4?

A: Gate driver compatibility depends on the specific circuit design. The lower gate threshold voltage (1V versus 4V) and reduced gate charge of the STB80NF03L-04T4 may allow operation with lower drive voltage levels. Existing 10V gate drive circuits will function with the STB80NF03L-04T4, though the device will exhibit faster switching characteristics due to lower gate charge requirements.

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