IRFR3707 N-Channel 30V 61A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFR3707 is an N-Channel MOSFET manufactured by Infineon Technologies, designed for surface mount applications in the TO-252AA (DPAK) package. This device operates at 30V drain-to-source voltage with a continuous drain current rating of 61A at 25°C and maximum power dissipation of 87W. The part is classified as Obsolete, indicating it is no longer in active production. Equivalent and substitute parts are necessary for ongoing design support, inventory replenishment, and new production requirements where the original part is unavailable.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	61	A (Tc)
On-Resistance (Rds On) @ 15A, 10V	13	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	3	V
Maximum Power Dissipation (Tc)	87	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	—
Mounting Type	Surface Mount	—
RoHS Status	Non-compliant	—

Substitute Part Grouping Explanation

Substitution of the IRFR3707 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Drain-to-Source Voltage (Vdss): Must equal 30V
Package Type: Must be TO-252-3 (DPAK) or equivalent surface mount package
FET Type: Must be N-Channel MOSFET
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must support -55°C to 175°C minimum

Performance Parameters (Allowable Variation):

Continuous Drain Current (Id): Substitute must meet or exceed 61A at 25°C, or provide equivalent current rating under specified conditions (Tc or Ta)
On-Resistance (Rds On): Lower values are acceptable; higher values require application-specific evaluation
Power Dissipation: Must support thermal requirements of the application
Gate Threshold Voltage: Must fall within ±20V maximum gate voltage specification

Substitutes are grouped into two categories: Direct Equivalents (matching all critical parameters) and Functional Alternatives (meeting voltage and package requirements with different current or power ratings).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Vgs(th) (V)	Power Diss. (W)	Package	Product Status	RoHS
IRFR3707	Infineon	30	61 (Tc)	13 @ 15A, 10V	3 @ 250µA	87	TO-252-3 (DPAK)	Obsolete	Non-compliant
IRFR3707ZTRPBF	Infineon	30	56 (Tc)	9.5 @ 15A, 10V	2.25 @ 25µA	50	TO-252-3 (DPAK)	Not For New Designs	ROHS3 Compliant
IPD135N03LGATMA1	Infineon	30	30 (Tc)	13.5 @ 30A, 10V	2.2 @ 250µA	31	TO-252-3 (DPAK)	Active	ROHS3 Compliant
BUK9214-30A,118	Nexperia USA Inc.	30	63 (Tc)	12 @ 25A, 10V	2 @ 1mA	107	TO-252-3 (DPAK)	Obsolete	ROHS3 Compliant
DMN3016LK3-13	Diodes Incorporated	30	12.4 (Ta)	12 @ 11A, 10V	2.3 @ 250µA	1.6	TO-252-3 (DPAK)	Active	ROHS3 Compliant
FDD6690A	onsemi	30	12 (Ta), 46 (Tc)	12 @ 12A, 10V	3 @ 250µA	3.3 (Ta), 56 (Tc)	TO-252-3 (DPAK)	Obsolete	ROHS3 Compliant
STD100N3LF3	STMicroelectronics	30	80 (Tc)	5.5 @ 40A, 10V	2.5 @ 250µA	110	TO-252-3 (DPAK)	Obsolete	ROHS3 Compliant
STD150N3LLH6	STMicroelectronics	30	80 (Tc)	2.8 @ 40A, 10V	2.5 @ 250µA	110	TO-252-3 (DPAK)	Obsolete	ROHS3 Compliant
STD40NF03LT4	STMicroelectronics	30	40 (Tc)	11 @ 20A, 10V	1 @ 250µA	80	TO-252-3 (DPAK)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute (Manufacturer Recommended): IRFR3707ZTRPBF is the direct Infineon equivalent with identical voltage rating and package. Although continuous drain current is reduced to 56A and power dissipation to 50W, this part maintains the same electrical characteristics and thermal package. Status: Not For New Designs; RoHS3 Compliant.

High-Current Alternative: STD150N3LLH6 (STMicroelectronics) provides 80A continuous drain current with superior on-resistance of 2.8mOhm at 40A, 10V. This part exceeds the original IRFR3707 performance specifications and is suitable for applications requiring higher current capacity. Status: Obsolete; RoHS3 Compliant.

Active Production Alternative: STD40NF03LT4 (STMicroelectronics) is currently in active production with 40A continuous drain current and 80W power dissipation. This part is suitable for applications where the full 61A rating is not required. Status: Active; RoHS3 Compliant.

Compliance Consideration: The original IRFR3707 is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, meeting current environmental regulations for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can IRFR3707ZTRPBF directly replace IRFR3707 in existing designs? A: IRFR3707ZTRPBF is electrically compatible with identical 30V voltage rating and TO-252-3 package. Continuous drain current is reduced from 61A to 56A. Substitution is valid if the application current requirement does not exceed 56A at 25°C.

Q: What is the difference between Tc and Ta current ratings? A: Tc (case temperature) ratings assume controlled thermal conditions with heat sinking. Ta (ambient temperature) ratings are measured at ambient conditions without active cooling. Parts specified with Ta ratings typically have lower current capacity than Tc-rated equivalents in the same package.

Q: Is STD150N3LLH6 a direct replacement for IRFR3707? A: STD150N3LLH6 meets the 30V voltage requirement and TO-252-3 package specification. It provides higher current capacity (80A) and superior on-resistance (2.8mOhm). It is functionally superior but classified as Obsolete. Substitution is valid for applications requiring equal or lower current than 80A.

Q: Why are some substitutes listed as Obsolete if they are recommended? A: Obsolete status indicates the manufacturer has discontinued active production. However, these parts remain available through authorized distributors with existing inventory. Obsolete parts are recommended when they provide superior performance or when active alternatives do not meet application requirements.

Q: Can I use STD40NF03LT4 if my application requires 61A continuous current? A: No. STD40NF03LT4 is rated for 40A continuous drain current at 25°C. Using this part in a 61A application would exceed its current rating and cause thermal stress and potential failure. Select a substitute with current rating equal to or greater than 61A.

Q: Are all substitute parts RoHS compliant? A: All listed substitutes are ROHS3 compliant. The original IRFR3707 is RoHS non-compliant. For new designs and production requiring RoHS compliance, select from the listed substitutes.

Q: What is the significance of the TO-252-3 (DPAK) package specification? A: TO-252-3 is a surface mount package with three leads (two signal leads plus thermal tab). All listed substitutes use this identical package, ensuring mechanical and thermal compatibility with existing PCB layouts and thermal management designs.

Q: Can on-resistance (Rds On) differences affect circuit performance? A: Yes. Lower on-resistance reduces power dissipation and heat generation. STD150N3LLH6 with 2.8mOhm provides superior efficiency compared to IRFR3707 at 13mOhm. Higher on-resistance increases power loss and requires additional thermal management. Select based on application power budget and thermal constraints.

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