Equivalent & Substitute Parts for IRL1104 N-Channel MOSFET

Part Overview

The IRL1104 is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage with 104A continuous drain current in a TO-220AB through-hole package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. The HEXFET® series device operates across a temperature range of -55°C to 175°C and is RoHS non-compliant. Substitute parts are required for applications where the IRL1104 is no longer available from inventory or when design flexibility permits component optimization.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	104	A
On-State Resistance (Rds On) @ 62A, 10V	8	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	1	V
Gate Charge (Qg) @ 4.5V	68	nC
Power Dissipation (Max)	167	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-220AB	—
FET Type	N-Channel	—

Substitute Part Grouping Explanation

Substitution of the IRL1104 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 40V
Continuous Drain Current (Id): Must equal or exceed 104A at 25°C
Package Type: Must be TO-220AB or compatible TO-220 variant
FET Type: Must be N-Channel MOSFET
Operating Temperature Range: Must span -55°C to 175°C minimum
Mounting Type: Must be Through Hole

Secondary Compatibility Parameters:

On-State Resistance (Rds On): Lower values indicate improved performance
Gate Charge (Qg): Lower values reduce switching losses
Power Dissipation: Higher ratings provide thermal margin

The substitute parts identified below meet the primary criteria. Parts with lower current ratings (75A) or higher voltage ratings (55V) are included where they satisfy the minimum electrical requirements and maintain package compatibility.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg (nC)	Power Dissipation (W)	Package	Product Status	RoHS Compliance
IRL1104	Infineon	40	104	8.0	68	167	TO-220AB	Obsolete	Non-compliant
IRL1404ZPBF	Infineon	40	75	3.1	110	230	TO-220AB	Active	ROHS3 Compliant
PHP191NQ06LT,127	Nexperia	55	75	3.7	95.6	300	TO-220AB	Obsolete	ROHS3 Compliant
PSMN2R2-40PS,127	Nexperia	40	100	2.1	130	306	TO-220AB	Obsolete	ROHS3 Compliant
PSMN4R5-40PS,127	Nexperia	40	100	4.6	42.3	148	TO-220AB	Obsolete	ROHS3 Compliant
PSMN8R0-40PS,127	Nexperia	40	77	7.6	21	86	TO-220AB	Obsolete	ROHS3 Compliant
STP150NF04	STMicroelectronics	40	80	7.0	150	300	TO-220	Active	ROHS3 Compliant
STP95N4F3	STMicroelectronics	40	80	6.2	54	110	TO-220	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

IRL1404ZPBF (Infineon Technologies) is the preferred substitute. Although rated for 75A continuous drain current (below the IRL1104's 104A), it meets the 40V voltage requirement and maintains TO-220AB package compatibility. The IRL1404ZPBF is in Active product status with ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete IRL1104. The lower on-state resistance (3.1 mOhm vs. 8.0 mOhm) and higher power dissipation rating (230W vs. 167W) offer improved thermal performance.

Alternative Recommendations:

STP150NF04 (STMicroelectronics) and STP95N4F3 (STMicroelectronics) are both Active products with ROHS3 compliance. Both are rated for 80A continuous drain current at 40V in TO-220 packages. STP95N4F3 offers lower gate charge (54 nC) and reduced power dissipation (110W), suitable for applications prioritizing switching efficiency. STP150NF04 provides higher power dissipation capability (300W) for thermal-intensive applications.

PSMN2R2-40PS,127 (Nexperia) meets the 100A current requirement at 40V with the lowest on-state resistance (2.1 mOhm) among all substitutes, but remains in Obsolete status.

Compliance Consideration:

All recommended active substitutes (IRL1404ZPBF, STP150NF04, STP95N4F3) are ROHS3 compliant, addressing regulatory requirements that the original IRL1104 does not satisfy.

Frequently Asked Questions (FAQ)

Q: Can IRL1404ZPBF replace IRL1104 in all applications?

A: IRL1404ZPBF is electrically compatible for applications where continuous drain current does not exceed 75A. The 40V voltage rating is identical, package is TO-220AB, and operating temperature range matches. For applications requiring the full 104A rating, current-derating analysis or alternative parts must be evaluated.

Q: What is the difference between TO-220AB and TO-220 packages?

A: Both are through-hole packages with identical pin configurations and thermal characteristics. TO-220AB is a specific variant designation. STP150NF04 and STP95N4F3 use the TO-220 designation but are mechanically and electrically compatible with TO-220AB footprints.

Q: Why are some substitute parts listed as Obsolete?

A: PSMN2R2-40PS,127, PSMN4R5-40PS,127, PSMN8R0-40PS,127, and PHP191NQ06LT,127 are included for reference and historical compatibility documentation. For new designs, Active status parts (IRL1404ZPBF, STP150NF04, STP95N4F3) are preferred for long-term supply assurance.

Q: How does on-state resistance (Rds On) affect circuit performance?

A: Lower Rds On values reduce conduction losses and heat generation. IRL1404ZPBF (3.1 mOhm) and PSMN2R2-40PS,127 (2.1 mOhm) dissipate less power than IRL1104 (8.0 mOhm) at equivalent current levels, improving efficiency and reducing thermal management requirements.

Q: What is gate charge (Qg) and why does it matter?

A: Gate charge represents the total charge required to switch the MOSFET on or off. Lower values (PSMN4R5-40PS,127 at 21 nC, PSMN8R0-40PS,127 at 21 nC) reduce switching losses and allow higher switching frequencies. Higher values (PSMN2R2-40PS,127 at 130 nC) may require stronger gate drive circuits.

Q: Are all substitutes rated for -55°C to 175°C operation?

A: All listed substitute parts meet or exceed the -55°C to 175°C operating temperature range specified for IRL1104.

Q: What is the significance of RoHS compliance?

A: ROHS3-compliant parts (all active substitutes) meet European Union Restriction of Hazardous Substances regulations, eliminating lead and other restricted materials. The original IRL1104 is RoHS non-compliant. For applications subject to regulatory requirements, ROHS3-compliant substitutes are mandatory.

Q: Can I use a higher voltage-rated MOSFET (55V) in place of a 40V device?

A: Yes. PHP191NQ06LT,127 is rated for 55V and is electrically compatible. Higher voltage ratings provide additional safety margin but do not degrade performance in 40V applications. Gate threshold voltage and other parameters must still be verified for gate drive circuit compatibility.

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