IRL1004L N-Channel MOSFET 40V 130A Equivalent & Substitute Parts

Part Overview

The IRL1004L is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage with 130A continuous drain current in the TO-262 package. This device is part of the HEXFET® series and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute components is essential for design continuity, production planning, and system reliability in applications requiring N-Channel power switching at 40V with high current capacity.

Substiute Parts

IRL1004L

Infineon TechnologiesIn Stock: 898IRL1004L Datasheet

Current PartRFQ

BUK7E8R3-40E,127

NXP USA Inc.In Stock: 2915BUK7E8R3-40E,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRL1004L is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Drain-to-Source Voltage (Vdss): Must equal or exceed 40V
• FET Type: N-Channel MOSFET technology
• Package Type: TO-262 or compatible mechanical footprint (TO-262-3, I2PAK)
• Operating Temperature Range: Must support -55°C to 175°C
• Mounting Type: Through Hole

Performance Parameters for Functional Equivalence:

• Continuous Drain Current (Id): Substitute must support minimum 130A at 25°C
• On-Resistance (Rds On): Lower or equal values indicate improved performance
• Gate Charge (Qg): Lower values reduce switching losses
• Input Capacitance (Ciss): Affects gate drive requirements

The BUK7E8R3-40E,127 from NXP USA Inc. meets the voltage and package requirements. However, its continuous drain current rating of 75A is below the IRL1004L specification of 130A, indicating reduced current-handling capacity in direct substitution scenarios.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The IRL1004L is classified as obsolete, making the BUK7E8R3-40E,127 the identified manufacturer-recommended substitute. The substitute part is active and carries AEC-Q101 automotive qualification, indicating ongoing production support and quality assurance.

Electrical Compatibility: Both devices share identical 40V Vdss ratings and compatible operating temperature ranges (-55°C to 175°C). The TO-262 and I2PAK packages are mechanically compatible, allowing direct PCB footprint substitution without layout modifications.

Current Rating Differential: The BUK7E8R3-40E,127 provides 75A continuous drain current versus the IRL1004L's 130A. Applications operating at or below 75A continuous current are fully compatible. Applications requiring the full 130A capacity of the original device require alternative solutions or parallel device configurations.

Gate Drive and Switching Characteristics: The substitute exhibits lower gate charge (24 nC vs. 100 nC) and reduced input capacitance (1730 pF vs. 5330 pF), resulting in faster switching transitions and reduced gate drive power requirements. The higher gate threshold voltage (4V vs. 1V) may require gate drive circuit verification in low-voltage applications.

Compliance and Certification: The BUK7E8R3-40E,127 holds AEC-Q101 automotive qualification, suitable for automotive and industrial applications requiring documented quality standards. The IRL1004L carries no specified automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can the BUK7E8R3-40E,127 directly replace the IRL1004L in all applications?

A: Direct replacement is possible only in applications where continuous drain current does not exceed 75A. The IRL1004L's 130A rating cannot be matched by this substitute. Applications requiring higher current capacity require alternative component selection or parallel device implementation.

Q: Are the TO-262 and I2PAK packages mechanically interchangeable?

A: Yes. Both packages use TO-262-3 long-lead configurations with compatible pin spacing and mounting hole patterns. PCB footprints designed for TO-262 accept I2PAK devices without modification.

Q: What is the impact of the lower gate charge in the substitute part?

A: Lower gate charge (24 nC vs. 100 nC) reduces switching energy and gate drive circuit power dissipation. Gate drive circuits designed for the original part will operate with improved efficiency. No circuit redesign is required.

Q: Does the higher gate threshold voltage of the substitute affect circuit operation?

A: The BUK7E8R3-40E,127 has a gate threshold voltage of 4V compared to the IRL1004L's 1V. Gate drive circuits must supply sufficient voltage to exceed this threshold. Circuits operating at marginal gate drive voltages require verification.

Q: Is the BUK7E8R3-40E,127 suitable for automotive applications?

A: Yes. The substitute carries AEC-Q101 automotive qualification, meeting automotive industry reliability and quality standards. The original IRL1004L does not specify automotive qualification.

Q: What is the significance of the reduced input capacitance in the substitute?

A: Lower input capacitance (1730 pF vs. 5330 pF) reduces gate drive circuit loading and switching losses. This improves overall system efficiency and reduces thermal stress on gate drive components.

Q: Can both devices operate across the full -55°C to 175°C temperature range?

A: Yes. Both the IRL1004L and BUK7E8R3-40E,127 support identical operating temperature ranges, ensuring thermal compatibility across all specified operating conditions.