IRF3707Z N-Channel 30V 59A MOSFET Equivalent & Substitute Parts

Part Overview

The IRF3707Z is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 59A continuous drain current at 25°C. This device features a Through Hole TO-220AB package and is part of the HEXFET® series. The IRF3707Z is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support, production continuity, and system maintenance. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, thermal characteristics, and package form factor to ensure direct replacement capability.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	59	A (Tc)
On-State Resistance (Rds On Max) @ Id, Vgs	9.5 mOhm @ 21A, 10V	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ Id	2.25	V @ 250µA
Power Dissipation (Max)	57	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-220AB	Through Hole
FET Type	N-Channel
Technology	MOSFET (Metal Oxide)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the IRF3707Z is determined by the following critical parameters:

Primary Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 30V
Package Type: Must be TO-220AB (Through Hole, 3-pin configuration)
FET Type: Must be N-Channel
Technology: Must be MOSFET (Metal Oxide)
Operating Temperature Range: Must support -55°C to 175°C (TJ)

Secondary Performance Criteria:

Continuous Drain Current (Id): Must meet or exceed 59A at 25°C
On-State Resistance (Rds On): Lower values indicate improved performance
Power Dissipation: Higher ratings provide thermal margin
Gate Threshold Voltage: Must be compatible with existing drive circuitry

The identified substitute parts maintain all primary compatibility criteria and offer equal or improved electrical performance characteristics. Substitutes are grouped by their electrical performance tier relative to the IRF3707Z baseline.

Parameter Comparison

Parameter	IRF3707Z	IRLB8721PBF	PSMN2R0-30PL,127	PSMN4R3-30PL,127
Manufacturer	Infineon Technologies	Infineon Technologies	Nexperia USA Inc.	Nexperia USA Inc.
Drain-to-Source Voltage (Vdss)	30 V	30 V	30 V	30 V
Continuous Drain Current (Id) @ 25°C	59 A (Tc)	62 A (Tc)	100 A (Tc)	100 A (Tc)
Rds On (Max) @ Id, Vgs	9.5 mOhm @ 21A, 10V	8.7 mOhm @ 31A, 10V	2.1 mOhm @ 15A, 10V	4.3 mOhm @ 15A, 10V
Gate Threshold Voltage (Vgs(th) Max) @ Id	2.25 V @ 250µA	2.35 V @ 25µA	2.15 V @ 1mA	2.15 V @ 1mA
Gate Charge (Qg) (Max) @ Vgs	15 nC @ 4.5 V	13 nC @ 4.5 V	117 nC @ 10 V	41.5 nC @ 10 V
Input Capacitance (Ciss) (Max) @ Vds	1210 pF @ 15 V	1077 pF @ 15 V	6810 pF @ 12 V	2400 pF @ 12 V
Power Dissipation (Max)	57 W (Tc)	65 W (Tc)	211 W (Tc)	103 W (Tc)
Operating Temperature Range	-55 to 175 °C (TJ)	-55 to 175 °C (TJ)	-55 to 175 °C (TJ)	-55 to 175 °C (TJ)
Package Type	TO-220AB	TO-220AB	TO-220AB	TO-220AB
FET Type	N-Channel	N-Channel	N-Channel	N-Channel
Product Status	Obsolete	Active	Obsolete	Obsolete
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

IRLB8721PBF (Infineon Technologies) - Primary Recommendation

The IRLB8721PBF is the preferred substitute for the IRF3707Z. This device is manufactured by the same supplier (Infineon Technologies) and maintains identical voltage and package specifications. The IRLB8721PBF offers improved electrical performance with 62A continuous drain current (compared to 59A), lower on-state resistance (8.7 mOhm vs. 9.5 mOhm), and higher power dissipation capability (65W vs. 57W). Critically, the IRLB8721PBF holds Active product status, ensuring long-term availability and supply chain continuity. The device is ROHS3 compliant, meeting modern environmental and regulatory requirements that the obsolete IRF3707Z does not satisfy. Gate charge and input capacitance are comparable, supporting direct integration into existing drive circuits without modification.

PSMN4R3-30PL,127 (Nexperia USA Inc.) - Secondary Recommendation

The PSMN4R3-30PL,127 provides a higher-performance alternative with 100A continuous drain current and significantly improved on-state resistance (4.3 mOhm). This device is suitable for applications requiring enhanced current handling and reduced thermal dissipation. The higher power dissipation rating (103W) accommodates demanding thermal environments. However, gate charge is elevated (41.5 nC @ 10V vs. 15 nC @ 4.5V), requiring verification of gate drive circuit compatibility. Input capacitance is also increased (2400 pF vs. 1210 pF), which may affect switching speed in high-frequency applications. The PSMN4R3-30PL,127 is ROHS3 compliant but carries Obsolete product status.

PSMN2R0-30PL,127 (Nexperia USA Inc.) - High-Performance Alternative

The PSMN2R0-30PL,127 delivers the lowest on-state resistance (2.1 mOhm) and highest power dissipation capability (211W) among substitute options. This device is appropriate for applications prioritizing efficiency and thermal performance. The significantly higher gate charge (117 nC @ 10V) and input capacitance (6810 pF @ 12V) require careful evaluation of gate drive circuit capability and switching frequency constraints. The PSMN2R0-30PL,127 is ROHS3 compliant but classified as Obsolete.

Compliance Considerations

All substitute parts are ROHS3 compliant, addressing regulatory requirements that the obsolete IRF3707Z does not meet. The IRLB8721PBF is the only substitute with Active product status, providing superior long-term supply assurance. Selection should prioritize the IRLB8721PBF for new designs and production continuity unless specific performance requirements necessitate the higher current or lower resistance characteristics of the Nexperia alternatives.

Frequently Asked Questions (FAQ)

Q: Can the IRLB8721PBF be used as a direct replacement for the IRF3707Z without circuit modifications?

A: Yes. The IRLB8721PBF maintains identical voltage rating (30V), package type (TO-220AB), and compatible gate threshold voltage (2.35V vs. 2.25V). Gate charge and input capacitance are comparable, supporting direct substitution in existing drive circuits. The improved electrical performance (higher current rating, lower on-state resistance) provides additional design margin.

Q: What are the key differences between the PSMN4R3-30PL,127 and PSMN2R0-30PL,127?

A: Both devices share identical voltage and current ratings (30V, 100A) and package type (TO-220AB). The primary differences are on-state resistance (4.3 mOhm vs. 2.1 mOhm), power dissipation (103W vs. 211W), gate charge (41.5 nC vs. 117 nC), and input capacitance (2400 pF vs. 6810 pF). The PSMN2R0-30PL,127 offers superior efficiency but requires higher gate drive capability and may exhibit slower switching characteristics due to increased capacitance.

Q: Are there any thermal management considerations when substituting these parts?

A: All substitute parts maintain the same TO-220AB package form factor and thermal interface. The IRLB8721PBF provides comparable thermal performance (65W vs. 57W). The PSMN4R3-30PL,127 and PSMN2R0-30PL,127 offer significantly higher power dissipation ratings (103W and 211W respectively), allowing operation at higher current levels with reduced junction temperature rise. Existing thermal management solutions (heatsinks, thermal interface materials) remain compatible across all substitutes.

Q: Why is the IRLB8721PBF recommended over the Nexperia alternatives despite lower current rating?

A: The IRLB8721PBF is recommended primarily due to Active product status, ensuring long-term availability and supply chain stability. It is manufactured by Infineon Technologies, the original IRF3707Z supplier, providing design continuity and proven compatibility. The 62A rating exceeds the IRF3707Z requirement (59A), and ROHS3 compliance addresses regulatory requirements. The Nexperia alternatives, while offering higher performance, carry Obsolete status, creating future supply uncertainty.

Q: What gate drive voltage is required for these substitute parts?

A: All substitute parts support gate drive voltages of ±20V maximum (Vgs Max). The gate threshold voltages are compatible: IRF3707Z (2.25V @ 250µA), IRLB8721PBF (2.35V @ 25µA), PSMN4R3-30PL,127 (2.15V @ 1mA), and PSMN2R0-30PL,127 (2.15V @ 1mA). Existing gate drive circuits designed for the IRF3707Z will operate these substitutes without modification. Gate charge differences (15 nC to 117 nC) may affect switching speed; higher values require proportionally higher gate current for equivalent switching performance.

Q: Are these parts suitable for high-frequency switching applications?

A: The IRLB8721PBF and PSMN4R3-30PL,127 maintain input capacitance values (1077 pF and 2400 pF respectively) comparable to or slightly higher than the IRF3707Z (1210 pF), supporting high-frequency operation. The PSMN2R0-30PL,127 exhibits significantly higher input capacitance (6810 pF), which may reduce maximum switching frequency and increase gate drive power dissipation. Application-specific frequency requirements should guide selection between these alternatives.

Q: What is the moisture sensitivity level for these substitute parts?

A: All substitute parts, including the IRF3707Z, are classified as MSL 1 (Unlimited), indicating no moisture sensitivity limitations. These devices can be stored and handled without special moisture control measures, simplifying inventory management and supply chain logistics.

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