IRFS41N15DTRLP Equivalent & Substitute Parts

Part Overview

The IRFS41N15DTRLP is an N-Channel 150V 41A MOSFET manufactured by Infineon Technologies in the HEXFET® series. This device is packaged in D2PAK (TO-263-3) surface mount configuration and is rated for continuous drain current of 41A at 25°C with maximum power dissipation of 3.1W at ambient temperature. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	150	V
Continuous Drain Current (Id) @ 25°C	41	A (Tc)
On-State Resistance (Rds On) @ 25A, 10V	45	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	5.5	V
Gate Charge (Qg) @ 10V	110	nC
Input Capacitance (Ciss) @ 25V	2520	pF
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the IRFS41N15DTRLP is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum Drain to Source Voltage (Vdss) of 150V or higher to ensure circuit protection and reliability.

Current Capability: Substitute parts must provide continuous drain current (Id) at or above 41A at 25°C to meet or exceed the original part's current handling capacity.

On-State Resistance (Rds On): The maximum on-state resistance must not significantly exceed 45mOhm at the specified gate voltage (10V) to maintain thermal performance and minimize power dissipation.

Package Compatibility: All substitutes must use D2PAK (TO-263-3) surface mount packaging to ensure mechanical and electrical compatibility with existing PCB layouts.

Operating Temperature Range: Substitute parts must support the full operating temperature range of -55°C to 175°C (TJ) or equivalent.

Compliance Standards: All substitute parts must maintain ROHS3 compliance and equivalent regulatory certifications (REACH Unaffected, EAR99 classification).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Vgs(th) (V)	Qg (nC)	Ciss (pF)	Temp Range (°C)	Package	Status
IRFS41N15DTRLP	Infineon	150	41 (Tc)	45 @ 25A, 10V	5.5 @ 250µA	110 @ 10V	2520 @ 25V	-55 to 175	D2PAK	Obsolete
IRFS4228PBF	Infineon	150	83 (Tc)	15 @ 33A, 10V	5 @ 250µA	107 @ 10V	4530 @ 25V	-40 to 175	D2PAK	Obsolete
IRFS4615TRLPBF	Infineon	150	33 (Tc)	42 @ 21A, 10V	5 @ 100µA	40 @ 10V	1750 @ 50V	-55 to 175	D2PAK	Active
AOB254L	Alpha & Omega	150	32 (Tc)	46 @ 20A, 10V	2.7 @ 250µA	40 @ 10V	2150 @ 75V	-55 to 175	D2PAK	Active
IXTA42N15T	IXYS	150	42 (Tc)	45 @ 21A, 10V	4.5 @ 250µA	21 @ 10V	1880 @ 25V	-55 to 175	D2PAK	Active
IXTA62N15P	IXYS	150	62 (Tc)	40 @ 31A, 10V	5.5 @ 250µA	70 @ 10V	2250 @ 25V	-55 to 175	D2PAK	Active
STB75NF20	STMicroelectronics	200	75 (Tc)	34 @ 37A, 10V	4 @ 250µA	84 @ 10V	3260 @ 25V	-50 to 150	D2PAK	Active

Engineering Selection Recommendations

Primary Substitute: IXTA42N15T

The IXTA42N15T from IXYS provides the closest electrical match to the IRFS41N15DTRLP. This part maintains 150V Vdss rating, delivers 42A continuous drain current (exceeding the original 41A specification), and exhibits identical 45mOhm on-state resistance at comparable current levels. The IXTA42N15T is in active product status, ensuring long-term availability and supply chain stability. Operating temperature range (-55°C to 175°C) matches the original specification. ROHS3 compliance and equivalent regulatory certifications are maintained.

Secondary Substitute: IXTA62N15P

The IXTA62N15P offers enhanced current capability at 62A continuous drain current with improved on-state resistance of 40mOhm. This part provides design margin for applications requiring higher current headroom. The 150V Vdss rating and D2PAK packaging maintain full compatibility. Active product status and complete regulatory compliance support long-term deployment.

Alternative Substitute: IRFS4615TRLPBF

The IRFS4615TRLPBF, manufactured by Infineon, provides a lower-current alternative at 33A continuous drain current. This part is suitable for applications where the original 41A specification exceeds actual circuit requirements. Active product status and full temperature range support (-55°C to 175°C) ensure availability. On-state resistance of 42mOhm at 21A provides acceptable thermal performance.

Higher Voltage Option: STB75NF20

The STB75NF20 from STMicroelectronics offers elevated voltage rating (200V Vdss) with significantly higher current capability (75A). This part is applicable only when circuit design permits higher voltage operation and when increased current capacity is beneficial. Operating temperature range is reduced to -50°C to 150°C, which may limit use in extreme cold environments. Active product status ensures availability.

Not Recommended: IRFS4228PBF

The IRFS4228PBF, while offering high current capability (83A), is classified as obsolete. Although electrical parameters are compatible, the obsolete status creates long-term supply chain risk equivalent to the original part. This substitute does not resolve the availability concern that necessitates finding alternatives.

Not Recommended: AOB254L

The AOB254L provides marginal current capability at 32A, falling below the original 41A specification. While active product status is favorable, the reduced current rating makes this part unsuitable for direct substitution in applications requiring full 41A capacity.

Frequently Asked Questions (FAQ)

Q: Can the IXTA42N15T directly replace the IRFS41N15DTRLP without PCB modifications?

A: Yes. The IXTA42N15T uses identical D2PAK (TO-263-3) surface mount packaging and maintains the same pin configuration. No PCB layout changes are required. Electrical parameters are compatible within normal design tolerances.

Q: What is the primary reason for substituting the IRFS41N15DTRLP?

A: The IRFS41N15DTRLP is classified as obsolete. Substitute parts ensure continued availability for new production, repairs, and design updates. Active product status of recommended substitutes provides long-term supply chain security.

Q: Does the IXTA42N15T provide better thermal performance than the original part?

A: The IXTA42N15T maintains equivalent on-state resistance (45mOhm) at comparable current levels. Thermal performance is equivalent. The part's higher current rating (42A vs. 41A) provides design margin without thermal degradation.

Q: Can I use the STB75NF20 as a direct replacement?

A: The STB75NF20 is electrically compatible but operates at 200V Vdss instead of 150V. Use this part only if circuit design permits higher voltage operation. The reduced operating temperature range (-50°C to 150°C) may limit use in extreme cold environments below -50°C.

Q: Are all recommended substitutes RoHS3 compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance and equivalent regulatory certifications (REACH Unaffected, EAR99 classification), ensuring compliance with environmental and trade regulations.

Q: What is the difference between the IXTA42N15T and IXTA62N15P?

A: The IXTA62N15P provides higher current capability (62A vs. 42A) and lower on-state resistance (40mOhm vs. 45mOhm). Select the IXTA62N15P when applications require higher current capacity or lower power dissipation. Both parts maintain 150V Vdss and D2PAK packaging.

Q: Is the IRFS4615TRLPBF suitable for all applications using the IRFS41N15DTRLP?

A: The IRFS4615TRLPBF is suitable only for applications where continuous drain current does not exceed 33A. For applications requiring the full 41A capacity, use IXTA42N15T or IXTA62N15P instead. The IRFS4615TRLPBF is appropriate for lower-current designs where the original 41A specification provides excess capacity.

Q: What packaging options are available for these substitutes?

A: All recommended substitutes use D2PAK (TO-263-3) surface mount packaging, identical to the original IRFS41N15DTRLP. No alternative package options are provided in the substitute parts list.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts meet the circuit's voltage, current, and thermal requirements. Ensure gate drive circuitry is compatible with the threshold voltage specifications of each part. Verify thermal management accommodates the power dissipation of each device.

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