IRFR3709ZPBF N-Channel 30V 86A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFR3709ZPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage and 86A continuous drain current in the HEXFET® series. This device is packaged in TO-252AA (DPAK) surface mount configuration and is currently discontinued at DiGi Electronics, with 1948 pieces available in new original stock.

Due to its discontinued status, equivalent and substitute parts are necessary for ongoing design support, production continuity, and component sourcing. Substitute devices must maintain compatibility across electrical ratings, thermal characteristics, and mechanical packaging to ensure direct replacement capability in existing circuit designs.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	86	A (Tc)
On-Resistance (Rds On) @ 15A, 10V	6.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.25	V
Gate Charge (Qg) @ 4.5V	26	nC
Power Dissipation (Max)	79	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 DPAK	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic for the IRFR3709ZPBF is based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): 30V minimum
N-Channel MOSFET technology
Surface mount TO-252-3 DPAK package
Operating temperature range: -55°C to 175°C
RoHS3 compliance

Secondary Compatibility Factors:

Continuous drain current rating (Id)
On-resistance (Rds On) characteristics
Gate charge (Qg) and threshold voltage (Vgs(th))
Power dissipation capability
Moisture sensitivity level (MSL 1)

Substitute parts are grouped into two categories based on current rating alignment:

Category A – High Current Substitutes (50A–94A): IPD50N03S207ATMA1, IPD50N03S2L06ATMA1, FDD8896. These devices maintain comparable or superior current handling and thermal performance.

Category B – Lower Current Substitutes (11A–17A): DMG8880LK3-13, FDD6670A. These devices provide functional equivalence for applications with reduced current requirements.

Category C – Higher Voltage Substitute (40V): STD95N4LF3. This device offers higher voltage rating with comparable current performance, suitable for applications requiring voltage margin.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg (nC)	Pd Max (W)	Package	Status
IRFR3709ZPBF	Infineon	30	86 (Tc)	6.5 @ 15A, 10V	26 @ 4.5V	79 (Tc)	TO-252-3 DPAK	Discontinued
IPD50N03S207ATMA1	Infineon	30	50 (Tc)	7.3 @ 50A, 10V	68 @ 10V	136 (Tc)	TO-252-3 DPAK	Active
IPD50N03S2L06ATMA1	Infineon	30	50 (Tc)	6.4 @ 50A, 10V	68 @ 10V	136 (Tc)	TO-252-3 DPAK	Active
DMG8880LK3-13	Diodes Inc.	30	11 (Ta)	7.5 @ 11.6A, 10V	27.6 @ 10V	1.68 (Ta)	TO-252-3 DPAK	Active
FDD6670A	onsemi	30	15 (Ta), 66 (Tc)	8 @ 15A, 10V	22 @ 5V	3.2 (Ta), 63 (Tc)	TO-252-3 DPAK	Last Time Buy
FDD8896	Fairchild	30	17 (Ta), 94 (Tc)	5.7 @ 35A, 10V	60 @ 10V	80 (Tc)	TO-252-3 DPAK	Active
STD95N4LF3	STMicroelectronics	40	80 (Tc)	6 @ 40A, 10V	70 @ 10V	110 (Tc)	TO-252-3 DPAK	Active

Engineering Selection Recommendations

For Direct Replacement (Preferred):

IPD50N03S2L06ATMA1 (Infineon OptiMOS™) is the primary recommended substitute. It maintains 30V Vdss rating, TO-252-3 DPAK packaging, and -55°C to 175°C operating range. This device carries AEC-Q101 automotive qualification and ROHS3 compliance. Although rated for 50A continuous current versus the original 86A, it provides superior on-resistance (6.4 mOhm) and higher power dissipation capability (136W). Product status is Active with high inventory availability (15,099 pieces).

IPD50N03S207ATMA1 (Infineon OptiMOS™) serves as an alternative with identical electrical specifications to IPD50N03S2L06ATMA1 but without automotive qualification. Inventory availability is significantly higher (47,600 pieces).

For Current-Limited Applications:

FDD8896 (Fairchild PowerTrench®) provides the closest current rating match at 94A (Tc), exceeding the original 86A specification. It maintains 30V Vdss, TO-252-3 DPAK package, and -55°C to 175°C operating range. On-resistance is superior at 5.7 mOhm. Product status is Active with 43,200 pieces in stock.

For Voltage-Margin Applications:

STD95N4LF3 (STMicroelectronics STripFET™ III) offers 40V Vdss rating with 80A continuous current, suitable for designs requiring higher voltage headroom. Package and temperature range remain compatible. Product status is Active.

Not Recommended for Direct Substitution:

DMG8880LK3-13 and FDD6670A are rated for significantly lower continuous current (11A and 15A respectively) and reduced power dissipation. These are suitable only for applications with substantially lower current requirements than the original design.

Frequently Asked Questions (FAQ)

Q1: Can IPD50N03S2L06ATMA1 directly replace IRFR3709ZPBF in all applications?

A: IPD50N03S2L06ATMA1 maintains electrical compatibility across Vdss (30V), package (TO-252-3 DPAK), and operating temperature (-55°C to 175°C). However, the continuous drain current rating is 50A versus the original 86A. Direct replacement is valid only if the application's actual current demand does not exceed 50A. Verify circuit current requirements before substitution.

Q2: What is the difference between IPD50N03S207ATMA1 and IPD50N03S2L06ATMA1?

A: Both devices share identical electrical specifications (30V, 50A, 6.4 mOhm Rds On, 136W power dissipation). The primary difference is that IPD50N03S2L06ATMA1 carries AEC-Q101 automotive qualification, making it suitable for automotive applications. IPD50N03S207ATMA1 lacks this qualification but has higher inventory availability. Select based on application requirements.

Q3: Why is FDD8896 rated for 94A when the original is 86A?

A: FDD8896 is a higher-performance device in the PowerTrench® family with superior on-resistance (5.7 mOhm versus 6.5 mOhm). The higher current rating reflects improved thermal and electrical characteristics. It is a valid upgrade substitute for applications requiring the original 86A capability.

Q4: Can STD95N4LF3 be used as a substitute despite its 40V rating?

A: STD95N4LF3 has a higher Vdss rating (40V versus 30V), which provides voltage margin but does not prevent substitution in 30V circuits. The device will operate safely at 30V. However, verify that the higher Vgs(th) (2.5V) and gate charge (70 nC) are compatible with the circuit's gate drive characteristics. This device is suitable for applications where voltage headroom is beneficial.

Q5: Are all substitute parts RoHS3 compliant?

A: All recommended substitute parts (IPD50N03S207ATMA1, IPD50N03S2L06ATMA1, FDD8896, STD95N4LF3) are ROHS3 compliant. DMG8880LK3-13 and FDD6670A are also ROHS3 compliant. Verify compliance documentation for specific procurement requirements.

Q6: What is the moisture sensitivity level (MSL) for substitute parts?

A: All substitute parts listed carry MSL 1 (Unlimited), matching the original IRFR3709ZPBF specification. This indicates no moisture sensitivity restrictions for storage and handling.

Q7: Are substitute parts available in the same packaging format?

A: All substitute parts use TO-252-3 DPAK surface mount packaging, maintaining mechanical compatibility with the original design. Verify PCB footprint compatibility before assembly, as minor dimensional variations may exist between manufacturers.

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