IRL1004STRLPBF N-Channel 40V 130A MOSFET Equivalent & Substitute Parts

Part Overview

The IRL1004STRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage with 130A continuous drain current at 25°C. The device is housed in a D2PAK (TO-263-3) surface mount package and is part of the HEXFET® series. This part is classified as obsolete, making identification of functionally equivalent active alternatives essential for new designs and production continuity.

Substitute parts must maintain compatibility across critical electrical parameters including drain-to-source voltage rating, continuous drain current capability, on-resistance characteristics, and thermal performance, while utilizing the same D2PAK surface mount package.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	130	A (Tc)
On-Resistance (Rds On Max) @ 78A, 10V	6.5	mOhm
Gate Threshold Voltage (Vgs th Max) @ 250µA	1	V
Gate Charge (Qg Max) @ 4.5V	100	nC
Power Dissipation (Tc)	200	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitution of the IRL1004STRLPBF is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 40V
Continuous Drain Current (Id): Must equal or exceed 130A at 25°C
On-Resistance (Rds On): Must not exceed 6.5mOhm at rated conditions to maintain thermal performance
Package Type: Must be D2PAK (TO-263-3) surface mount
FET Type: N-Channel MOSFET technology
Operating Temperature: Must support -55°C to 175°C range

Secondary Compatibility Parameters:

Gate Threshold Voltage (Vgs th)
Gate Charge (Qg)
Input Capacitance (Ciss)
Maximum Gate Voltage (Vgs Max)

Substitute parts identified in this reference meet the primary criteria. Parts with Vdss ratings of 55V are included as they provide voltage margin while maintaining electrical compatibility. Parts with drain current ratings below 130A are listed only when on-resistance and thermal characteristics provide functional equivalence for specific application contexts.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On Max (mOhm)	Qg Max (nC)	Power Dissipation Tc (W)	Status
IRL1004STRLPBF	Infineon Technologies	40	130	6.5	100	200	Obsolete
BUK765R2-40B,118	NXP USA Inc.	40	75	5.2	52	203	Active
BUK9609-40B,118	Nexperia USA Inc.	40	75	7.0	32	157	Active
PSMN8R0-40BS,118	Nexperia USA Inc.	40	77	7.6	21	86	Active
STB120N4LF6	STMicroelectronics	40	80	4.0	80	110	Active
STB140NF55T4	STMicroelectronics	55	80	8.0	142	300	Active
STB150NF55T4	STMicroelectronics	55	120	6.0	190	300	Active
STB85NF55T4	STMicroelectronics	55	80	8.0	150	300	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (40V Rating, Matched Current Capability):

STB150NF55T4 provides the closest functional match to the IRL1004STRLPBF. Although rated at 55V (providing voltage margin), it delivers 120A continuous drain current with 6.0mOhm on-resistance, maintaining thermal performance within acceptable parameters. This part is active, AEC-Q101 qualified for automotive applications, and RoHS3 compliant. Inventory availability is 10,200 units.

Alternative 40V Options (Current Derating Consideration):

BUK765R2-40B,118 (NXP USA Inc.) maintains the 40V rating with 75A continuous drain current and superior 5.2mOhm on-resistance. This part is AEC-Q101 qualified and automotive-grade. Selection of this part requires application review to confirm that 75A drain current is sufficient for the intended circuit function.

STB120N4LF6 (STMicroelectronics) operates at 40V with 80A continuous drain current and 4.0mOhm on-resistance, the lowest among 40V options. This part is AEC-Q101 qualified and automotive-grade with 15,465 units in stock.

Higher Voltage Options (55V Rating):

STB140NF55T4 and STB85NF55T4 both operate at 55V with 80A continuous drain current and 8.0mOhm on-resistance. These parts provide voltage margin for applications where transient overvoltage protection is beneficial. Both are active, AEC-Q101 qualified, and RoHS3 compliant.

Compliance and Qualification Status:

All recommended substitute parts are active products with current manufacturing support. Parts from STMicroelectronics (STB series) and Nexperia (BUK and PSMN series) carry AEC-Q101 automotive qualification. All parts are RoHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) across all options.

Frequently Asked Questions (FAQ)

Q: Can I use a 55V rated MOSFET as a direct replacement for the 40V IRL1004STRLPBF?

A: Yes. A 55V rated MOSFET is electrically compatible with a 40V application. The higher voltage rating provides additional margin for transient overvoltage events. All electrical parameters (on-resistance, gate charge, thermal characteristics) remain valid. Package compatibility (D2PAK) must be confirmed.

Q: What is the significance of on-resistance (Rds On) in selecting a substitute?

A: On-resistance directly determines power dissipation and thermal performance. The IRL1004STRLPBF specifies 6.5mOhm maximum on-resistance. Substitute parts with lower on-resistance (such as STB120N4LF6 at 4.0mOhm) reduce heat generation and improve efficiency. Parts with higher on-resistance (such as PSMN8R0-40BS,118 at 7.6mOhm) may require thermal management review.

Q: Why do some substitute parts have lower drain current ratings than the IRL1004STRLPBF?

A: The IRL1004STRLPBF is rated for 130A continuous drain current, which is a high-current device. Active substitute parts with 75A to 80A ratings reflect current market availability. Selection of lower-current parts requires application analysis to confirm that the reduced current rating does not exceed circuit requirements. STB150NF55T4 at 120A provides the closest current match.

Q: Are all substitute parts automotive qualified?

A: Most recommended substitutes carry AEC-Q101 automotive qualification. BUK765R2-40B,118, BUK9609-40B,118, STB120N4LF6, STB140NF55T4, STB150NF55T4, and STB85NF55T4 are all AEC-Q101 qualified. PSMN8R0-40BS,118 does not list automotive qualification in the provided data.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Both are surface mount delivery formats. Cut Tape (CT) & Digi-Reel® is suitable for lower-volume applications and manual assembly. Tape & Reel (TR) is optimized for high-volume automated assembly. Electrical and mechanical specifications are identical; packaging format selection depends on production volume and assembly equipment.

Q: Can I substitute a part with higher gate charge (Qg)?

A: Gate charge affects gate drive circuit design and switching speed. The IRL1004STRLPBF specifies 100nC gate charge at 4.5V. Substitute parts with higher gate charge (such as STB150NF55T4 at 190nC) require higher gate drive current or longer switching times. Gate drive circuit compatibility must be verified before substitution.

Q: What does RoHS3 compliance mean?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates that the part does not contain restricted substances including lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers. All recommended substitute parts are RoHS3 compliant.

Q: Is the D2PAK package identical across all manufacturers?

A: D2PAK (TO-263-3) is a standardized surface mount package with identical pinout and mechanical dimensions across manufacturers. All substitute parts listed use D2PAK packaging and are mechanically interchangeable on the PCB. Thermal performance may vary based on die design and internal construction.

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