IRFR3711ZPBF N-Channel MOSFET 20V 93A Equivalent & Substitute Parts

Part Overview

The IRFR3711ZPBF is an N-Channel MOSFET manufactured by Infineon Technologies, part of the HEXFET® series. This device is rated for 20V drain-to-source voltage with 93A continuous drain current and 79W maximum power dissipation in a surface mount TO-252AA (DPAK) package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The IRFR3711ZPBF serves in switching and power management circuits where low on-resistance and high current handling are required.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	20	V
Continuous Drain Current (Id) @ 25°C	93	A
On-Resistance (Rds On Max) @ 15A, 10V	5.7	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.45	V
Gate Charge (Qg) @ 4.5V	27	nC
Input Capacitance (Ciss) @ 10V	2160	pF
Power Dissipation (Max)	79	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-252-3 (DPAK)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution for the IRFR3711ZPBF is determined by the following critical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss) rating must be equal to or greater than 20V
Continuous Drain Current (Id) must be equal to or greater than 93A
On-Resistance (Rds On) must be compatible with circuit requirements
Package type must be TO-252-3 (DPAK) for mechanical and thermal compatibility
Operating temperature range must encompass -55°C to 175°C
Gate threshold voltage and input capacitance must be within acceptable circuit operating margins

Substitute Parts Identified:

IRFR3711ZTRPBF (Infineon Technologies) — Direct equivalent with identical electrical specifications, differentiated only by packaging format (Tape & Reel vs. bulk)
STD100N3LF3 (STMicroelectronics) — Substitute with higher Vdss rating (30V) and comparable Rds On performance, same DPAK package
IPD50N03S207ATMA1 (Infineon Technologies) — Substitute with higher Vdss rating (30V) and higher power dissipation capability, same DPAK package

Parameter Comparison

Parameter	IRFR3711ZPBF	IRFR3711ZTRPBF	STD100N3LF3	IPD50N03S207ATMA1
Manufacturer	Infineon	Infineon	STMicroelectronics	Infineon
Vdss (V)	20	20	30	30
Id @ 25°C (A)	93	93	80	50
Rds On Max @ 10V (mOhm)	5.7 @ 15A	5.7 @ 15A	5.5 @ 40A	7.3 @ 50A
Vgs(th) Max (V)	2.45	2.45	2.5	4.0
Gate Charge Qg (nC)	27 @ 4.5V	27 @ 4.5V	27 @ 5V	68 @ 10V
Ciss Max (pF)	2160 @ 10V	2160 @ 10V	2060 @ 25V	2000 @ 25V
Power Dissipation Max (W)	79	79	110	136
Operating Temp Range (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)
Product Status	Obsolete	Not For New Designs	Obsolete	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

IRFR3711ZTRPBF is the direct electrical equivalent of IRFR3711ZPBF. Both devices share identical electrical specifications and package configuration. The primary difference is packaging format: IRFR3711ZTRPBF is supplied in Tape & Reel format while IRFR3711ZPBF is supplied in bulk. IRFR3711ZTRPBF carries ROHS3 compliance certification. This part is designated "Not For New Designs" but remains suitable for replacement and maintenance applications where the original specification must be preserved.

STD100N3LF3 is a functional substitute with higher voltage rating (30V vs. 20V). This part provides superior voltage margin in applications operating below 20V. The continuous drain current rating of 80A is lower than the original 93A specification. On-resistance performance is comparable at 5.5mOhm. STD100N3LF3 is obsolete but carries ROHS3 compliance. Selection of this part requires verification that the 80A current rating is sufficient for the application.

IPD50N03S207ATMA1 is a functional substitute with the highest voltage rating (30V) and power dissipation capability (136W). This part is currently in active production status. The continuous drain current rating of 50A is significantly lower than the original 93A specification, making this part suitable only for applications with reduced current requirements. Gate charge is higher at 68nC, which may affect switching speed in high-frequency applications. This part carries ROHS3 compliance certification.

For new designs, IPD50N03S207ATMA1 is the recommended choice due to active product status and full compliance certifications. For maintenance and replacement of existing IRFR3711ZPBF applications, IRFR3711ZTRPBF provides the most direct substitution with identical electrical performance.

Frequently Asked Questions (FAQ)

Q: Can IRFR3711ZTRPBF be used as a direct replacement for IRFR3711ZPBF?

A: Yes. IRFR3711ZTRPBF is electrically identical to IRFR3711ZPBF. Both devices have the same Vdss (20V), Id (93A), Rds On (5.7mOhm), and all other electrical parameters. The only difference is packaging format: IRFR3711ZTRPBF is supplied in Tape & Reel while IRFR3711ZPBF is supplied in bulk. Both use the same TO-252-3 (DPAK) package footprint.

Q: Why is the drain current rating lower for STD100N3LF3 and IPD50N03S207ATMA1?

A: These parts are designed with different current and voltage trade-offs. STD100N3LF3 is rated for 80A at 30V, and IPD50N03S207ATMA1 is rated for 50A at 30V. The higher voltage rating (30V vs. 20V) allows these devices to operate in higher-voltage applications. Selection depends on whether your circuit requires the full 93A current capacity or can operate with reduced current ratings.

Q: Are all substitute parts RoHS compliant?

A: IRFR3711ZTRPBF, STD100N3LF3, and IPD50N03S207ATMA1 all carry ROHS3 compliance certification. The original IRFR3711ZPBF does not specify RoHS status in the provided data.

Q: What is the difference between IRFR3711ZPBF and IRFR3711ZTRPBF packaging?

A: IRFR3711ZPBF is supplied in bulk (standard cut tape or tube packaging). IRFR3711ZTRPBF is supplied in Tape & Reel (TR) format, which is standard for automated assembly lines. Both use identical TO-252-3 (DPAK) component packages with the same PCB footprint and thermal characteristics.

Q: Can I use IPD50N03S207ATMA1 in a circuit designed for 93A continuous current?

A: No. IPD50N03S207ATMA1 is rated for only 50A continuous drain current, which is significantly lower than the 93A requirement of IRFR3711ZPBF. Using this part in a 93A application would exceed its current rating and cause device failure. This part is suitable only for applications with current requirements of 50A or less.

Q: What is the significance of the higher gate charge (Qg) in IPD50N03S207ATMA1?

A: IPD50N03S207ATMA1 has a gate charge of 68nC compared to 27nC for IRFR3711ZPBF. Higher gate charge requires more energy to switch the device on and off, which may increase switching losses and reduce switching speed in high-frequency applications. This parameter must be evaluated in circuits operating above 100kHz.

Q: Are all substitute parts available in the same TO-252-3 (DPAK) package?

A: Yes. IRFR3711ZTRPBF, STD100N3LF3, and IPD50N03S207ATMA1 are all supplied in TO-252-3 (DPAK) packages. This ensures mechanical compatibility and identical PCB footprints. Thermal performance via the tab connection is equivalent across all parts.

Q: Which substitute part should I choose for a new design?

A: IPD50N03S207ATMA1 is recommended for new designs because it carries active product status and full ROHS3 compliance certification. However, this selection is valid only if your circuit can operate with 50A continuous current and accepts the higher gate charge characteristics. If your design requires 93A continuous current, no suitable active substitute exists; you must use IRFR3711ZTRPBF for maintenance applications or redesign the circuit for lower current requirements.

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