IRL540NSTRR N-Channel 100V 36A MOSFET Equivalent & Substitute Parts

Part Overview

The IRL540NSTRR is an N-Channel MOSFET manufactured by Infineon Technologies in the HEXFET® series, rated for 100V drain-source voltage and 36A continuous drain current in D2PAK surface mount packaging. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement.

The IRL540NSTRR operates across a temperature range of -55°C to 175°C (TJ) with maximum power dissipation of 3.8W at ambient temperature and 140W at case temperature. The part is packaged in TO-263-3 (D2PAK with 2 leads plus tab) configuration and is RoHS non-compliant.

Key Parameters

Parameter	Value	Unit	Condition
Drain-Source Voltage (Vdss)	100	V	Maximum rating
Continuous Drain Current (Id)	36	A	@ 25°C (Tc)
On-State Resistance (Rds On)	44	mOhm	@ 18A, 10V Vgs
Gate Threshold Voltage (Vgs(th))	2	V	@ 250µA Id
Gate Charge (Qg)	74	nC	@ 5V Vgs
Input Capacitance (Ciss)	1800	pF	@ 25V Vds
Power Dissipation (Max)	3.8 / 140	W	Ta / Tc
Operating Temperature Range	-55 to 175	°C	TJ
Package Type	D2PAK	TO-263-3	Surface Mount
Gate Voltage (Max)	±16	V	Absolute maximum

Substitute Part Grouping Explanation

Substitution of the IRL540NSTRR is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Drain-Source Voltage (Vdss): 100V minimum
Continuous Drain Current (Id): 36A or greater at 25°C
Package Type: D2PAK (TO-263-3) surface mount configuration
Operating Temperature Range: -55°C to 175°C minimum
On-State Resistance (Rds On): Comparable performance at rated conditions

Secondary Compatibility Factors:

Gate Threshold Voltage (Vgs(th)): 2V to 4V range
Gate Charge (Qg): 28nC to 79nC acceptable range
Input Capacitance (Ciss): 1180pF to 3072pF acceptable range
Maximum Gate Voltage (Vgs): ±10V to ±25V acceptable range

Substitutes are grouped into two categories: Parametric Equivalents (identical electrical specifications) and Manufacturer Recommended Alternatives (enhanced performance or compliance characteristics).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Vgs(th) (V)	Qg (nC)	Ciss (pF)	Power Diss. Tc (W)	Status	RoHS
IRL540NSTRR	Infineon	100	36	44 @ 18A, 10V	2 @ 250µA	74 @ 5V	1800 @ 25V	140	Obsolete	Non-compliant
IRL540NSTRLPBF	Infineon	100	36	44 @ 18A, 10V	2 @ 250µA	74 @ 5V	1800 @ 25V	140	Active	ROHS3 Compliant
BUK9640-100A,118	Nexperia	100	39	39 @ 25A, 10V	2 @ 1mA	48 @ 5V	3072 @ 25V	158	Active	ROHS3 Compliant
FDB3682	onsemi	100	32	36 @ 32A, 10V	4 @ 250µA	28 @ 10V	1250 @ 25V	95	Active	ROHS3 Compliant
FQB44N10TM	onsemi	100	43.5	39 @ 21.75A, 10V	4 @ 250µA	62 @ 10V	1800 @ 25V	146	Active	ROHS3 Compliant
HUF75631S3ST	onsemi	100	33	40 @ 33A, 10V	4 @ 250µA	79 @ 20V	1220 @ 25V	120	Active	ROHS3 Compliant
IRL540SPBF	Vishay Siliconix	100	28	77 @ 17A, 5V	2 @ 250µA	64 @ 5V	2200 @ 25V	150	Active	ROHS3 Compliant
IRL540STRLPBF	Vishay Siliconix	100	28	77 @ 17A, 5V	2 @ 250µA	64 @ 5V	2200 @ 25V	150	Active	ROHS3 Compliant
STB30NF10T4	STMicroelectronics	100	35	45 @ 15A, 10V	4 @ 250µA	55 @ 10V	1180 @ 25V	115	Active	ROHS3 Compliant
STB40NF10LT4	STMicroelectronics	100	40	33 @ 20A, 10V	2.5 @ 250µA	64 @ 4.5V	2300 @ 25V	150	Active	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

The IRL540NSTRLPBF from Infineon Technologies is the direct parametric equivalent to the IRL540NSTRR. This part maintains identical electrical specifications across all critical parameters: 100V Vdss, 36A continuous drain current, 44mOhm Rds On, and 140W power dissipation at case temperature. The primary distinction is product status: IRL540NSTRLPBF is active and ROHS3 compliant, whereas the original part is obsolete and RoHS non-compliant. Packaging differs only in format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect electrical performance. This substitute is recommended for direct replacement in existing designs.

Enhanced Performance Alternatives:

For applications requiring improved performance characteristics, the following active parts provide enhanced specifications while maintaining 100V Vdss and D2PAK packaging:

STB40NF10LT4 (STMicroelectronics): Offers 40A continuous drain current with reduced Rds On of 33mOhm at 20A/10V, providing lower conduction losses. Power dissipation reaches 150W at case temperature. ROHS3 compliant with extended temperature range to -65°C.
FQB44N10TM (onsemi): Delivers 43.5A continuous drain current with 39mOhm Rds On at 21.75A/10V. Power dissipation of 146W at case temperature. ROHS3 compliant. Suitable for high-current applications.
BUK9640-100A,118 (Nexperia): Provides 39A continuous drain current with improved Rds On of 39mOhm at 25A/10V. Power dissipation reaches 158W at case temperature. Includes AEC-Q101 automotive qualification and ROHS3 compliance.

Lower Current Alternatives:

For applications with reduced current requirements, the following parts maintain 100V Vdss and D2PAK packaging:

IRL540SPBF and IRL540STRLPBF (Vishay Siliconix): Both rated for 28A continuous drain current with 77mOhm Rds On at 17A/5V. Power dissipation of 150W at case temperature. ROHS3 compliant. Suitable for lower-power designs.
FDB3682 (onsemi): Rated for 32A continuous drain current with 36mOhm Rds On at 32A/10V. Power dissipation of 95W at case temperature. ROHS3 compliant.
HUF75631S3ST (onsemi): Rated for 33A continuous drain current with 40mOhm Rds On at 33A/10V. Power dissipation of 120W at case temperature. ROHS3 compliant.
STB30NF10T4 (STMicroelectronics): Rated for 35A continuous drain current with 45mOhm Rds On at 15A/10V. Power dissipation of 115W at case temperature. ROHS3 compliant.

All recommended substitutes are active products with ROHS3 compliance, addressing the obsolescence and compliance limitations of the original IRL540NSTRR.

Frequently Asked Questions (FAQ)

Q: Can IRL540NSTRLPBF be used as a direct replacement for IRL540NSTRR?

A: Yes. IRL540NSTRLPBF is a parametric equivalent with identical electrical specifications. The only differences are product status (active versus obsolete) and packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Both parts are rated for 100V Vdss, 36A continuous drain current, and 44mOhm Rds On. Electrical performance and thermal characteristics are identical.

Q: What is the primary reason to substitute the IRL540NSTRR?

A: The IRL540NSTRR is classified as obsolete, which creates procurement challenges and supply uncertainty. Additionally, it is RoHS non-compliant. Active alternatives with ROHS3 compliance are available with equivalent or enhanced electrical performance.

Q: Are all substitute parts available in D2PAK packaging?

A: Yes. All substitute parts listed in this document are packaged in D2PAK (TO-263-3) surface mount configuration with 2 leads plus tab. This ensures mechanical and thermal compatibility with existing PCB layouts and thermal management designs.

Q: What is the difference between parametric equivalents and manufacturer recommended alternatives?

A: Parametric equivalents maintain identical electrical specifications across all critical parameters. Manufacturer recommended alternatives provide enhanced performance characteristics such as higher continuous drain current, lower on-state resistance, or improved power dissipation, while maintaining the same voltage rating and package type.

Q: Can I use a substitute with lower continuous drain current rating?

A: Substitutes with lower continuous drain current ratings (such as IRL540SPBF at 28A or FDB3682 at 32A) can be used only if the application's actual current requirements do not exceed the substitute's rating. The original IRL540NSTRR is rated for 36A; using a lower-rated part in a 36A application will result in thermal stress and potential failure.

Q: Can I use a substitute with higher continuous drain current rating?

A: Yes. Substitutes with higher continuous drain current ratings (such as FQB44N10TM at 43.5A or STB40NF10LT4 at 40A) are suitable for applications originally designed for the 36A IRL540NSTRR. Higher current ratings provide design margin and typically offer improved thermal performance.

Q: What is the significance of Rds On (on-state resistance) in substitution?

A: Rds On determines conduction losses and heat generation during operation. Lower Rds On values reduce power dissipation and improve efficiency. The IRL540NSTRR has 44mOhm Rds On at 18A/10V. Substitutes with comparable or lower Rds On values (such as STB40NF10LT4 at 33mOhm or BUK9640-100A,118 at 39mOhm) provide equal or better performance.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, addressing the RoHS non-compliance of the original IRL540NSTRR. This compliance is essential for applications subject to RoHS regulations.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts operate across -55°C to 175°C (TJ), matching the original IRL540NSTRR. STB40NF10LT4 extends the lower limit to -65°C. All parts maintain rated electrical performance across the specified temperature range.

Q: Can packaging format differences affect substitution?

A: Packaging format (Tape & Reel, Cut Tape & Digi-Reel®, or Tube) affects procurement and handling but does not impact electrical performance or PCB compatibility. All substitute parts use identical D2PAK surface mount packages, ensuring mechanical and thermal compatibility.

Q: What certifications should I verify for automotive applications?

A: For automotive applications, verify AEC-Q101 qualification. BUK9640-100A,118 from Nexperia includes AEC-Q101 automotive qualification. Other substitutes are suitable for industrial and commercial applications.

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