IRL1104SPBF N-Channel MOSFET 40V 104A Equivalent & Substitute Parts

Part Overview

The IRL1104SPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 40V drain-to-source voltage with 104A continuous drain current at Tc. This device is packaged in D2PAK (TO-263-3) surface mount configuration and is currently classified as obsolete. The HEXFET® series component features a maximum on-resistance of 8mOhm at 62A/10V and operates across a temperature range of -55°C to 175°C. Due to its obsolete status, identifying equivalent substitute parts with compatible electrical and mechanical parameters is essential for design continuity and procurement planning.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	104	A (Tc)
On-Resistance (Rds On Max) @ Id, Vgs	8	mOhm @ 62A, 10V
Gate Threshold Voltage (Vgs(th) Max) @ Id	1	V @ 250µA
Gate Charge (Qg Max) @ Vgs	68	nC @ 4.5V
Input Capacitance (Ciss Max) @ Vds	3445	pF @ 25V
Power Dissipation (Max)	2.4 / 167	W (Ta) / W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
Moisture Sensitivity Level	1	Unlimited

Substitute Part Grouping Explanation

Substitution of the IRL1104SPBF is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Drain-to-Source Voltage (Vdss): Must equal 40V
Package Type: Must be D2PAK (TO-263-3) surface mount
FET Type: Must be N-Channel MOSFET
Operating Temperature Range: Must support -55°C to 175°C minimum
Mounting Type: Must be surface mount

Performance Compatibility Parameters:

Continuous Drain Current (Id): Substitute must meet or exceed 104A at Tc
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

All three substitute parts (AOB4184, BUK9609-40B,118, and PSMN8R0-40BS,118) share identical Vdss (40V), package configuration (D2PAK), and operating temperature range (-55°C to 175°C). Each substitute maintains N-Channel MOSFET technology with surface mount capability, satisfying the core substitution criteria.

Parameter Comparison

Parameter	IRL1104SPBF (Infineon)	AOB4184 (Alpha & Omega)	BUK9609-40B,118 (Nexperia)	PSMN8R0-40BS,118 (Nexperia)
Manufacturer	Infineon Technologies	Alpha & Omega Semiconductor Inc.	Nexperia USA Inc.	Nexperia USA Inc.
Drain-to-Source Voltage (Vdss)	40V	40V	40V	40V
Continuous Drain Current (Id) @ Tc	104A	50A	75A	77A
On-Resistance (Rds On Max)	8mOhm @ 62A, 10V	10mOhm @ 20A, 10V	7mOhm @ 25A, 10V	7.6mOhm @ 25A, 10V
Gate Threshold Voltage (Vgs(th) Max)	1V @ 250µA	3V @ 250µA	2V @ 1mA	4V @ 1mA
Gate Charge (Qg Max)	68nC @ 4.5V	35nC @ 10V	32nC @ 5V	21nC @ 10V
Input Capacitance (Ciss Max)	3445pF @ 25V	1800pF @ 20V	3600pF @ 25V	1262pF @ 12V
Power Dissipation (Max) @ Tc	167W	50W	157W	86W
Operating Temperature Range	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C
Package Type	D2PAK (TO-263-3)	TO-263 (D2PAK)	D2PAK (TO-263-3)	D2PAK (TO-263-3)
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Substitute Selection Criteria:

All three substitute parts satisfy the core electrical and mechanical compatibility requirements for the IRL1104SPBF. Selection among these alternatives depends on application-specific current and thermal requirements:

AOB4184 (Alpha & Omega Semiconductor Inc.):

Rated for 50A continuous drain current at Tc, which is below the original 104A specification
Suitable for applications where current requirements do not exceed 50A
Active product status ensures long-term availability
ROHS3 compliant
Lower gate charge (35nC) and input capacitance (1800pF) reduce switching losses

BUK9609-40B,118 (Nexperia USA Inc.):

Rated for 75A continuous drain current at Tc
Automotive-grade component with AEC-Q101 qualification
TrenchMOS™ series technology
Active product status with established supply chain
ROHS3 compliant
Power dissipation of 157W at Tc approaches original specification (167W)
Suitable for automotive and industrial applications requiring automotive qualification

PSMN8R0-40BS,118 (Nexperia USA Inc.):

Rated for 77A continuous drain current at Tc
Lowest gate charge (21nC) and input capacitance (1262pF) among substitutes
Active product status
ROHS3 compliant
Optimized for applications prioritizing switching efficiency
Power dissipation of 86W at Tc is lower than original specification

For applications requiring current handling closest to the original 104A specification, BUK9609-40B,118 provides the highest current rating (75A) among available substitutes while maintaining thermal performance (157W at Tc). For applications prioritizing switching efficiency and gate drive optimization, PSMN8R0-40BS,118 offers the lowest parasitic capacitances and gate charge.

Frequently Asked Questions (FAQ)

Q: Can AOB4184 directly replace IRL1104SPBF in all applications?

A: AOB4184 is electrically and mechanically compatible in D2PAK package and 40V rating. However, its 50A continuous drain current rating is significantly lower than the original 104A specification. Direct replacement is only suitable for applications where actual current requirements do not exceed 50A. Thermal analysis of the specific application is required to confirm adequacy.

Q: What is the primary difference between BUK9609-40B,118 and PSMN8R0-40BS,118?

A: Both parts share 40V Vdss and D2PAK packaging. BUK9609-40B,118 offers higher current capability (75A vs. 77A) with higher power dissipation (157W vs. 86W) and is automotive-qualified (AEC-Q101). PSMN8R0-40BS,118 features lower gate charge (21nC vs. 32nC) and input capacitance (1262pF vs. 3600pF), making it more suitable for applications requiring optimized switching performance and reduced gate drive power.

Q: Are all substitute parts RoHS compliant?

A: Yes. AOB4184, BUK9609-40B,118, and PSMN8R0-40BS,118 are all ROHS3 compliant. The original IRL1104SPBF RoHS status was not specified in available documentation.

Q: Do the substitute parts require different PCB footprints?

A: No. All substitute parts use D2PAK (TO-263-3) package configuration, which is mechanically identical to the original IRL1104SPBF. PCB footprints and land patterns remain unchanged.

Q: Which substitute part is recommended for new designs?

A: For new designs, selection depends on current and thermal requirements. BUK9609-40B,118 is recommended for applications requiring automotive qualification or current levels approaching 75A. PSMN8R0-40BS,118 is recommended for applications prioritizing switching efficiency and lower gate drive requirements. AOB4184 is suitable only for applications with current requirements not exceeding 50A.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the original IRL1104SPBF and all three substitutes, have Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

Q: Are gate drive voltage requirements compatible across all parts?

A: Gate drive voltage specifications differ among parts. IRL1104SPBF specifies ±16V maximum Vgs. AOB4184 specifies ±20V, BUK9609-40B,118 specifies ±15V, and PSMN8R0-40BS,118 specifies ±20V. Existing gate drive circuits operating within ±15V are compatible with all substitutes. Circuits requiring ±16V operation are compatible with AOB4184 and PSMN8R0-40BS,118 but not BUK9609-40B,118.

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