IRF3709SPBF N-Channel MOSFET 30V 90A Equivalent & Substitute Parts

Part Overview

The IRF3709SPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 90A continuous drain current at 25°C. This device is packaged in D2PAK (TO-263-3) surface mount configuration and is part of the HEXFET® series. The IRF3709SPBF is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. Suitable alternatives must maintain compatibility with the D2PAK package, 30V voltage rating, and high current capability while meeting RoHS3 compliance and MSL Level 1 moisture sensitivity specifications.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	90	A (Tc)
On-Resistance (Rds On Max) @ 15A, 10V	9	mOhm
Gate Threshold Voltage (Vgs th) @ 250µA	3	V
Gate Charge (Qg) @ 5V	41	nC
Power Dissipation (Max)	120	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the IRF3709SPBF is determined by the following critical parameters:

Primary Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must be equal to or greater than 30V
Package Type: Must be D2PAK (TO-263-3) surface mount configuration
Continuous Drain Current (Id): Must support 90A or higher at 25°C
Mounting Type: Surface mount only
Compliance: RoHS3 compliant, MSL Level 1

Secondary Electrical Parameters:

On-Resistance (Rds On): Lower or equal values indicate improved performance
Gate Charge (Qg): Lower values reduce switching losses
Operating Temperature Range: Must encompass -55°C to 150°C minimum
Gate Threshold Voltage (Vgs th): Must be within ±20V maximum gate voltage specification

The substitute parts listed below meet these criteria and are electrically and mechanically compatible with the IRF3709SPBF for direct board-level replacement.

Parameter Comparison

Parameter	IRF3709SPBF (Main)	PSMN4R3-30BL,118	PSMN017-30BL,118	IXTA90N055T2
Manufacturer	Infineon Technologies	Nexperia USA Inc.	Nexperia USA Inc.	IXYS
Vdss (V)	30	30	30	55
Id @ 25°C (A)	90	100	32	90
Rds On Max @ 10V (mOhm)	9 @ 15A	4.1 @ 15A	17 @ 10A	8.4 @ 25A
Vgs th @ 250µA or 1mA (V)	3	2.15	2.15	4
Gate Charge Qg (nC)	41 @ 5V	41.5 @ 10V	10.7 @ 10V	42 @ 10V
Power Dissipation Max (W)	120 (Tc)	103 (Tc)	47 (Tc)	150 (Tc)
Operating Temperature (°C)	-55 to 150	-55 to 175	-55 to 175	-55 to 175
Package	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)	TO-263AA
Product Status	Discontinued	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

PSMN4R3-30BL,118 (Primary Substitute)

The PSMN4R3-30BL,118 from Nexperia USA Inc. is the preferred direct substitute for the IRF3709SPBF. This device maintains identical 30V Vdss rating and D2PAK package configuration. The PSMN4R3-30BL,118 provides 100A continuous drain current, exceeding the 90A requirement of the main part. On-resistance is improved at 4.1 mOhm versus 9 mOhm, resulting in lower power dissipation and improved thermal performance. Gate charge remains comparable at 41.5 nC. The part is currently active in production with full RoHS3 compliance and MSL Level 1 rating. Operating temperature range extends to 175°C, providing additional thermal margin. Inventory availability is 10,750 pieces.

IXTA90N055T2 (Voltage-Rated Substitute)

The IXTA90N055T2 from IXYS is an alternative substitute with elevated 55V Vdss rating. This part maintains 90A continuous drain current and D2PAK package compatibility. The higher voltage rating provides design margin for transient overvoltage conditions. On-resistance is 8.4 mOhm at 25A, comparable to the main part. Gate charge is 42 nC. The device is currently active with RoHS3 compliance and MSL Level 1 rating. Operating temperature extends to 175°C. Power dissipation capability is 150W (Tc), exceeding the main part. Inventory availability is 896 pieces. This substitute is suitable for applications where voltage headroom is beneficial.

PSMN017-30BL,118 (Limited Substitute)

The PSMN017-30BL,118 from Nexperia USA Inc. maintains the 30V Vdss and D2PAK package of the main part. However, continuous drain current is limited to 32A, significantly below the 90A requirement. On-resistance is higher at 17 mOhm. Gate charge is reduced to 10.7 nC. This part is marked as obsolete and is not recommended for new designs requiring full 90A current capability. Inventory is 2,767 pieces. This substitute is applicable only for applications with reduced current requirements below 32A.

Frequently Asked Questions (FAQ)

Q: Can the PSMN4R3-30BL,118 be used as a direct replacement for the IRF3709SPBF without circuit modifications?

A: Yes. Both devices share identical 30V Vdss rating, D2PAK package configuration, and ±20V maximum gate voltage specification. The PSMN4R3-30BL,118 provides superior electrical performance with lower on-resistance (4.1 mOhm vs. 9 mOhm) and higher current rating (100A vs. 90A). No circuit modifications are required for direct substitution.

Q: What is the difference between the D2PAK and TO-263AA package designations used in these parts?

A: D2PAK and TO-263AA are equivalent package designations for the same physical surface mount configuration with three leads (two signal leads plus thermal tab). Both packages are mechanically and electrically compatible for board-level replacement.

Q: Why does the IXTA90N055T2 have a higher Vdss rating of 55V compared to the IRF3709SPBF at 30V?

A: The IXTA90N055T2 is designed for applications requiring higher voltage headroom. The elevated 55V rating provides protection against transient overvoltage events while maintaining the same 90A current capability and D2PAK package. This part is suitable for circuits where voltage margin is beneficial, though it is not required for 30V applications.

Q: Is the PSMN017-30BL,118 suitable as a substitute for the IRF3709SPBF?

A: The PSMN017-30BL,118 is not recommended as a primary substitute due to its 32A continuous drain current rating, which is significantly below the 90A requirement of the main part. This device is applicable only for applications with reduced current demands below 32A. Additionally, this part is marked as obsolete.

Q: What compliance certifications apply to all substitute parts listed?

A: All substitute parts listed (PSMN4R3-30BL,118, PSMN017-30BL,118, and IXTA90N055T2) are RoHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating. All parts are REACH unaffected and classified under ECCN EAR99 with HTSUS code 8541.29.0095, matching the regulatory status of the main part.

Q: What is the inventory status of substitute parts?

A: PSMN4R3-30BL,118 has 10,750 pieces in stock (active product). IXTA90N055T2 has 896 pieces in stock (active product). PSMN017-30BL,118 has 2,767 pieces in stock (obsolete product). The PSMN4R3-30BL,118 is recommended for new designs due to active product status and superior inventory availability.

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