IRF3707PBF Equivalent & Substitute Parts

Part Overview

The IRF3707PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 62A continuous drain current at 25°C. This device is packaged in TO-220AB through-hole configuration and is classified as obsolete. Due to its obsolete product status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	62	A (Tc)
Rds On (Max) @ Id, Vgs	12.5 mOhm @ 15A, 10V	mOhm
Gate Threshold Voltage (Vgs(th)) @ Id	3	V @ 250µA
Gate Charge (Qg) @ Vgs	19	nC @ 4.5V
Power Dissipation (Max)	87	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-220-3	Through Hole
Vgs (Max)	±20	V

Substitute Part Grouping Explanation

Substitution of the IRF3707PBF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): Must equal or exceed 30V
Package Type: Must be TO-220AB through-hole configuration
FET Type: Must be N-Channel MOSFET
Operating Temperature Range: Must support -55°C to 175°C (TJ)
Gate Voltage Rating (Vgs Max): Must support ±20V

Secondary Compatibility Parameters:

Continuous Drain Current (Id): Rated current capacity determines application suitability
Rds On (Max): On-resistance affects thermal performance and power dissipation
Gate Charge (Qg): Influences switching speed and drive circuit requirements
Power Dissipation (Max): Thermal capability must match or exceed application demands

The substitute parts listed below meet the primary substitution criteria and are compatible with the IRF3707PBF in TO-220AB through-hole applications operating within the specified voltage and temperature ranges.

Parameter Comparison

Parameter	IRF3707PBF	IRLB8721PBF	PSMN022-30PL,127	PSMN4R3-30PL,127
Manufacturer	Infineon Technologies	Infineon Technologies	Nexperia USA Inc.	Nexperia USA Inc.
Vdss (V)	30	30	30	30
Id @ 25°C (A)	62	62	30	100
Rds On (Max) (mOhm)	12.5 @ 15A, 10V	8.7 @ 31A, 10V	22 @ 5A, 10V	4.3 @ 15A, 10V
Vgs(th) (V)	3 @ 250µA	2.35 @ 25µA	2.15 @ 1mA	2.15 @ 1mA
Gate Charge Qg (nC)	19 @ 4.5V	13 @ 4.5V	9 @ 10V	41.5 @ 10V
Power Dissipation (W)	87	65	41	103
Operating Temperature (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Active	Obsolete	Obsolete
Vgs (Max) (V)	±20	±20	±20	±20

Engineering Selection Recommendations

IRLB8721PBF (Infineon Technologies)

The IRLB8721PBF is the primary recommended substitute for the IRF3707PBF. This device maintains identical voltage and current ratings (30V, 62A) while offering improved electrical characteristics. The IRLB8721PBF features lower on-resistance (8.7 mOhm vs. 12.5 mOhm), reduced gate charge (13 nC vs. 19 nC), and lower power dissipation (65W vs. 87W). The device is currently in active production status, ensuring long-term availability. RoHS3 compliance and REACH unaffected status confirm regulatory alignment. This substitute provides direct functional replacement with enhanced performance characteristics.

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

The PSMN4R3-30PL,127 is suitable for applications requiring higher current capacity. Rated at 100A continuous drain current, this device exceeds the IRF3707PBF current specification while maintaining the 30V voltage rating. The significantly lower on-resistance (4.3 mOhm) results in reduced power dissipation in high-current applications. However, the higher gate charge (41.5 nC) and increased power dissipation rating (103W) indicate different thermal and switching characteristics. This substitute is appropriate for designs where current margin and thermal headroom are prioritized. RoHS3 compliance and REACH unaffected status are confirmed.

PSMN022-30PL,127 (Nexperia USA Inc.)

The PSMN022-30PL,127 is a lower-current alternative rated at 30A continuous drain current. This device is suitable only for applications where the required drain current does not exceed 30A. The higher on-resistance (22 mOhm) and lower power dissipation (41W) indicate reduced thermal performance compared to the IRF3707PBF. This substitute should be selected only when current requirements are significantly lower than the original specification. RoHS3 compliance and REACH unaffected status are confirmed.

Frequently Asked Questions (FAQ)

Q: Can the IRLB8721PBF directly replace the IRF3707PBF without circuit modifications?

A: Yes. The IRLB8721PBF maintains identical voltage (30V) and current (62A) ratings, operates within the same temperature range (-55°C to 175°C), and uses the same TO-220AB package. Pin configuration and gate voltage requirements (±20V) are identical. No circuit modifications are required for direct substitution.

Q: What is the key difference between the IRLB8721PBF and PSMN4R3-30PL,127?

A: The IRLB8721PBF matches the IRF3707PBF current rating (62A), while the PSMN4R3-30PL,127 is rated for 100A. The PSMN4R3-30PL,127 has lower on-resistance (4.3 mOhm vs. 8.7 mOhm) but higher gate charge (41.5 nC vs. 13 nC). Selection depends on whether the application requires the higher current capacity and lower on-resistance of the PSMN4R3-30PL,127.

Q: Why is the PSMN022-30PL,127 listed as a substitute if it has only 30A rating?

A: The PSMN022-30PL,127 is listed as a substitute for applications where the actual drain current requirement is 30A or lower. It is not suitable for applications requiring the full 62A capacity of the IRF3707PBF. This substitute should be selected only when design requirements permit reduced current capacity.

Q: Are all substitute parts RoHS3 compliant?

A: The IRLB8721PBF is RoHS3 compliant. The PSMN022-30PL,127 and PSMN4R3-30PL,127 are both RoHS3 compliant. All substitute parts have REACH unaffected status, matching the regulatory compliance of the original IRF3707PBF.

Q: What is the significance of gate charge (Qg) differences between these devices?

A: Gate charge affects the switching speed and drive circuit requirements. The IRLB8721PBF has lower gate charge (13 nC) compared to the IRF3707PBF (19 nC), resulting in faster switching and reduced drive circuit power consumption. The PSMN4R3-30PL,127 has significantly higher gate charge (41.5 nC), requiring more robust gate drive circuitry. The PSMN022-30PL,127 has the lowest gate charge (9 nC), enabling the fastest switching response.

Q: Can the IRF3707PBF be used in applications designed for the PSMN4R3-30PL,127?

A: No. The IRF3707PBF is rated for 62A maximum continuous drain current, while the PSMN4R3-30PL,127 is rated for 100A. Using the IRF3707PBF in an application designed for 100A operation would exceed its current rating and cause device failure. The PSMN4R3-30PL,127 should be used only when the application requires its higher current capacity.

Q: What is the product status significance for component selection?

A: The IRF3707PBF is obsolete, making it unavailable for new production. The IRLB8721PBF is in active production status, ensuring continued availability and supply chain reliability. When selecting substitutes, active production status provides assurance of long-term component availability for ongoing manufacturing and field support.

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