IRFR3911TRLPBF Equivalent & Substitute Parts

Part Overview

The IRFR3911TRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 100V drain-to-source voltage with 14A continuous drain current at 25°C. This device is packaged in TO-252-3 (DPAK) surface mount configuration and is part of the HEXFET® series. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	100	V
Continuous Drain Current (Id) @ 25°C	14	A (Tc)
Rds On (Max) @ Id, Vgs	115 mOhm @ 8.4A, 10V	mOhm
Gate Threshold Voltage Vgs(th) (Max)	4	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	32	nC @ 10V
Input Capacitance (Ciss) (Max) @ Vds	740	pF @ 25V
Power Dissipation (Max)	56	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	-
Mounting Type	Surface Mount	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the IRFR3911TRLPBF is determined by strict electrical and mechanical compatibility within the following criteria:

Critical Matching Parameters:

Drain to Source Voltage (Vdss): Must equal or exceed 100V
Package Type: Must be TO-252-3 (DPAK) surface mount
Mounting Type: Surface mount configuration
Operating Temperature Range: Must support -55°C to 175°C minimum
Moisture Sensitivity Level: MSL 1 (Unlimited) preferred for compatibility

Functional Compatibility Parameters:

Continuous Drain Current (Id): Substitute must meet or exceed 14A @ 25°C
Rds On (Max): Lower or equal values indicate improved performance
Gate Threshold Voltage: Must be compatible with 10V drive voltage
Gate Charge and Input Capacitance: Affect switching characteristics but do not prevent substitution

The substitute parts listed below meet all critical matching parameters and maintain electrical compatibility with the original IRFR3911TRLPBF design requirements.

Parameter Comparison

Parameter	IRFR3911TRLPBF (Main)	STD10NF10T4	STD15NF10T4	BUK7275-100A,118	ZXMN10A25KTC
Manufacturer	Infineon Technologies	STMicroelectronics	STMicroelectronics	Nexperia USA Inc.	Diodes Incorporated
Vdss (V)	100	100	100	100	100
Id @ 25°C (A)	14	13	23	21.7	4.2
Rds On (Max) @ 10V (mOhm)	115 @ 8.4A	130 @ 5A	65 @ 12A	75 @ 13A	125 @ 2.9A
Vgs(th) (Max) (V)	4 @ 250µA	4 @ 250µA	4 @ 250µA	4 @ 1mA	4 @ 250µA
Gate Charge (Qg) (Max) @ 10V (nC)	32	21	40	-	17.16
Ciss (Max) @ 25V (pF)	740	460	870	1210	859
Power Dissipation (Max) (W)	56	50	70	89	2.11
Operating Temperature (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 150
Package	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)	DPAK	TO-252-3
Product Status	Obsolete	Active	Active	Obsolete	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

STD10NF10T4 (STMicroelectronics)

This substitute is suitable for applications where the drain current requirement is 13A or lower. The STD10NF10T4 is an active product with ROHS3 compliance, providing long-term availability. The slightly higher Rds On (130 mOhm @ 5A, 10V) compared to the main part results in marginally increased power dissipation. Gate charge is lower (21 nC), which may improve switching performance in certain applications. Operating temperature range matches the original specification.

STD15NF10T4 (STMicroelectronics)

This substitute provides higher current capability (23A @ 25°C) and improved Rds On performance (65 mOhm @ 12A, 10V), resulting in lower power dissipation and thermal stress. The STD15NF10T4 is an active product with ROHS3 compliance and full temperature range support (-55°C to 175°C). This part is recommended for applications requiring performance enhancement or thermal margin improvement over the original IRFR3911TRLPBF.

BUK7275-100A,118 (Nexperia USA Inc.)

This substitute offers the highest current rating (21.7A @ 25°C) and superior Rds On performance (75 mOhm @ 13A, 10V) among the listed alternatives. The BUK7275-100A,118 is qualified to AEC-Q101 automotive standards and carries ROHS3 compliance. Although listed as obsolete, it provides enhanced thermal performance (89W max power dissipation) suitable for demanding applications. Higher input capacitance (1210 pF) may affect switching speed in high-frequency circuits.

ZXMN10A25KTC (Diodes Incorporated)

This substitute is limited to 4.2A continuous drain current and is suitable only for low-current applications. The ZXMN10A25KTC is an active product with ROHS3 compliance but operates at a reduced maximum temperature (150°C vs. 175°C). This part is not recommended as a direct substitute for the IRFR3911TRLPBF in applications requiring the full 14A current specification.

Frequently Asked Questions (FAQ)

Q: Can STD10NF10T4 directly replace IRFR3911TRLPBF in all applications?

A: STD10NF10T4 is suitable for applications where continuous drain current does not exceed 13A. The 100V Vdss rating, TO-252-3 package, and operating temperature range are identical. However, the slightly higher Rds On (130 mOhm vs. 115 mOhm) results in approximately 13% higher on-state power dissipation. Verify thermal design margins before substitution.

Q: What is the advantage of using STD15NF10T4 over the original part?

A: STD15NF10T4 provides improved electrical performance with lower Rds On (65 mOhm vs. 115 mOhm), enabling higher current handling (23A vs. 14A) and reduced power dissipation (70W vs. 56W). The part is active with confirmed long-term availability and ROHS3 compliance, addressing the obsolescence of the original IRFR3911TRLPBF.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use TO-252-3 (DPAK) surface mount packaging, ensuring mechanical and thermal compatibility. Pin configuration and PCB footprint are identical across all listed substitutes.

Q: Does BUK7275-100A,118 require different PCB layout considerations?

A: No. BUK7275-100A,118 uses the same TO-252-3 (DPAK) package and pin configuration. However, the higher input capacitance (1210 pF vs. 740 pF) may require gate drive circuit optimization in high-frequency switching applications above 100 kHz.

Q: Why is ZXMN10A25KTC listed as a substitute if it has only 4.2A rating?

A: ZXMN10A25KTC meets the critical matching parameters (100V Vdss, TO-252-3 package, MSL 1) but is suitable only for applications where the actual drain current requirement is significantly lower than the original 14A specification. It is not recommended as a general replacement.

Q: What is the impact of operating temperature differences?

A: ZXMN10A25KTC operates to 150°C maximum junction temperature, compared to 175°C for all other parts. This 25°C difference may affect thermal margin in high-temperature environments. For applications requiring full -55°C to 175°C operation, use STD10NF10T4, STD15NF10T4, or BUK7275-100A,118.

Q: Are all substitutes RoHS compliant?

A: STD10NF10T4, STD15NF10T4, BUK7275-100A,118, and ZXMN10A25KTC are all ROHS3 compliant. The original IRFR3911TRLPBF RoHS status was not specified in the provided data.

Q: Which substitute offers the best thermal performance?

A: BUK7275-100A,118 provides the highest power dissipation rating (89W) and lowest Rds On (75 mOhm @ 13A, 10V), making it the optimal choice for thermally demanding applications. STD15NF10T4 offers the second-best thermal performance (70W, 65 mOhm @ 12A, 10V) with confirmed active product status.

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