IRFR3707Z N-Channel 30V 56A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFR3707Z is an N-Channel MOSFET manufactured by Infineon Technologies, designed for surface mount applications in the TO-252AA (DPAK) package. This device features a 30V drain-source voltage rating with 56A continuous drain current capability and 50W power dissipation at case temperature. The part is classified as Obsolete, indicating it is no longer in active production. Identifying equivalent and substitute parts is necessary for design continuity, procurement flexibility, and long-term product support when the original part becomes unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value	Unit
Drain-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	56	A (Tc)
On-Resistance (Rds On) @ 15A, 10V	9.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.25	V
Power Dissipation (Max)	50	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	Surface Mount
Gate Charge (Qg) @ 4.5V	14	nC
Input Capacitance (Ciss) @ 15V	1150	pF

Substitute Part Grouping Explanation

Substitution of the IRFR3707Z is determined by strict equivalence in the following critical parameters:

Primary Substitution Criteria:

Drain-Source Voltage (Vdss): Must equal 30V
Package Type: Must be TO-252-3 (DPAK) surface mount
FET Type: Must be N-Channel MOSFET
Technology: Must be Metal Oxide (MOSFET)
Mounting Type: Must be Surface Mount

Secondary Compatibility Parameters:

Continuous Drain Current (Id): Substitute must meet or exceed 56A (Tc)
On-Resistance (Rds On): Lower or equal values indicate improved performance
Power Dissipation: Must support minimum 50W (Tc)
Operating Temperature: Must span -55°C to 175°C minimum
Gate Threshold Voltage: Must be within ±20V maximum gate voltage specification

Substitutes are grouped into two categories: Direct Equivalents (identical electrical specifications) and Functional Alternatives (meeting or exceeding all critical parameters within the same package).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Pd Max (W)	Tj Range (°C)	Package	Status
IRFR3707Z	Infineon	30	56 (Tc)	9.5 @ 15A, 10V	50	-55 to 175	TO-252-3	Obsolete
IRFR3707ZTRPBF	Infineon	30	56 (Tc)	9.5 @ 15A, 10V	50	-55 to 175	TO-252-3	Not For New Designs
IPD090N03LGATMA1	Infineon	30	40 (Tc)	9 @ 30A, 10V	42	-55 to 175	TO-252-3	Active
DMN3010LK3-13	Diodes Inc.	30	43 (Tc)	9.5 @ 18A, 10V	1.6	-55 to 150	TO-252-3	Active
FDD8876	onsemi	30	73 (Tc)	8.2 @ 35A, 10V	70	-55 to 175	TO-252-3	Obsolete
NTD4302T4G	onsemi	30	68 (Tc)	10 @ 20A, 10V	75	-55 to 150	TO-252-3	Obsolete
STD100N3LF3	STMicroelectronics	30	80 (Tc)	5.5 @ 40A, 10V	110	-55 to 175	TO-252-3	Obsolete
STD150N3LLH6	STMicroelectronics	30	80 (Tc)	2.8 @ 40A, 10V	110	-55 to 175	TO-252-3	Obsolete
STD40NF03LT4	STMicroelectronics	30	40 (Tc)	11 @ 20A, 10V	80	-55 to 175	TO-252-3	Active

Engineering Selection Recommendations

Direct Equivalent: IRFR3707ZTRPBF is the direct equivalent of IRFR3707Z, sharing identical electrical specifications and package configuration. However, this part is classified as "Not For New Designs," indicating limited future availability. This part is suitable for replacement in existing designs requiring exact specifications.

Active Production Alternatives: For new designs or long-term procurement, IPD090N03LGATMA1 (Infineon, Active status) and STD40NF03LT4 (STMicroelectronics, Active status) are recommended. Both maintain the 30V Vdss rating and TO-252-3 package. IPD090N03LGATMA1 delivers 40A continuous current with improved on-resistance (9 mOhm), while STD40NF03LT4 provides 40A with 11 mOhm on-resistance. Both support the full -55°C to 175°C operating range and carry RoHS3 compliance.

Higher Current Capability: FDD8876 (onsemi) and NTD4302T4G (onsemi) exceed the 56A specification with 73A and 68A ratings respectively, offering superior current handling. FDD8876 provides the lowest on-resistance (8.2 mOhm) among all substitutes. Both are classified as Obsolete.

Superior Performance: STD150N3LLH6 (STMicroelectronics) delivers exceptional on-resistance of 2.8 mOhm at 40A, 10V, representing the lowest resistance option. This part supports 80A continuous current and 110W power dissipation. However, it is classified as Obsolete.

Compliance Status: All substitute parts listed carry RoHS3 compliance except the original IRFR3707Z (RoHS non-compliant). All parts are REACH Unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can IRFR3707ZTRPBF be used as a direct replacement for IRFR3707Z?

A: Yes. IRFR3707ZTRPBF is electrically and mechanically identical to IRFR3707Z. Both share 30V Vdss, 56A continuous drain current, 9.5 mOhm on-resistance, and TO-252-3 package configuration. The primary difference is packaging format (Cut Tape & Digi-Reel® versus bulk) and product status classification.

Q: What is the minimum continuous drain current required for a substitute?

A: The substitute must support at least 56A (Tc) continuous drain current to maintain equivalent performance. Parts rated below this threshold (such as IPD090N03LGATMA1 at 40A or STD40NF03LT4 at 40A) are functional alternatives suitable only for applications where the actual current demand does not exceed their ratings.

Q: Are all substitutes compatible with the same PCB layout?

A: Yes. All listed substitutes use the TO-252-3 (DPAK) package with identical pin configuration and footprint. Direct PCB layout compatibility is maintained across all parts. However, thermal management considerations may differ due to variations in power dissipation ratings.

Q: Which substitute offers the best on-resistance performance?

A: STD150N3LLH6 provides the lowest on-resistance at 2.8 mOhm (measured at 40A, 10V), representing a 71% improvement over the original IRFR3707Z specification of 9.5 mOhm. This reduction minimizes conduction losses in high-current applications.

Q: What is the operating temperature difference between substitutes?

A: Most substitutes support the full -55°C to 175°C range matching the original part. Exceptions include DMN3010LK3-13 and NTD4302T4G, which are limited to -55°C to 150°C. This 25°C reduction in maximum junction temperature may impact thermal margin in high-temperature applications.

Q: Are there RoHS compliance differences between the original and substitutes?

A: Yes. The original IRFR3707Z is RoHS non-compliant. All listed substitutes carry RoHS3 compliance certification, making them suitable for applications requiring RoHS-compliant component sourcing.

Q: Which substitute is recommended for new product designs?

A: IPD090N03LGATMA1 (Infineon, Active status) is recommended for new designs. It maintains Infineon manufacturing continuity with the original part, carries Active product status ensuring long-term availability, and provides RoHS3 compliance. STD40NF03LT4 (STMicroelectronics, Active status) is an alternative option from a different manufacturer with equivalent compliance and availability assurance.

Q: Can substitutes with higher current ratings (68A, 73A, 80A) be used in place of the 56A original?

A: Yes. Higher current-rated parts are functionally compatible and provide design margin. However, they may exhibit different thermal characteristics and gate charge requirements. Verification of gate drive circuit compatibility is necessary, particularly for parts with significantly different Qg specifications (e.g., NTD4302T4G at 80 nC versus IRFR3707Z at 14 nC).

Q: What is the significance of "Obsolete" versus "Active" product status?

A: Active status indicates ongoing production and long-term availability assurance. Obsolete status indicates discontinued production with limited remaining inventory. For critical applications requiring extended product lifecycle support, Active-status parts (IPD090N03LGATMA1, STD40NF03LT4) are preferred over Obsolete alternatives.

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