IRFP264 N-Channel MOSFET 250V 38A TO-247 Equivalent & Substitute Parts

Part Overview

The IRFP264 is an N-Channel MOSFET manufactured by IXYS, rated for 250V drain-to-source voltage with 38A continuous drain current at 25°C and 280W maximum power dissipation. The device is housed in a TO-247 through-hole package and is currently classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for production and field replacement applications.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Drain to Source Voltage (Vdss)	250	V
Continuous Drain Current (Id) @ 25°C	38	A (Tc)
On-State Resistance (Rds On) @ 23A, 10V	75	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	210	nC
Maximum Gate Voltage (Vgs)	±20	V
Power Dissipation (Max)	280	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—

Substitute Part Grouping Explanation

Substitution of the IRFP264 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Drain-to-Source Voltage (Vdss) must equal or exceed 250V
Continuous Drain Current (Id) must equal or exceed 38A at 25°C
On-State Resistance (Rds On) must not exceed 75mOhm at the specified gate voltage
Gate Threshold Voltage (Vgs(th)) must be compatible at 4V nominal
Maximum Gate Voltage (Vgs) must accommodate ±20V operation
Power Dissipation capability must support 280W or greater

Mechanical Compatibility Criteria:

Package type must be TO-247-3 through-hole configuration
Pin configuration must be electrically equivalent (Gate, Drain, Source)

Direct Equivalents are parts that match all electrical parameters and package specifications, enabling pin-for-pin replacement without circuit modification.

Similar Substitutes are parts that meet or exceed the electrical requirements but may differ in secondary parameters such as gate charge, input capacitance, or power dissipation rating. These parts are functionally compatible but require verification of application-specific performance characteristics.

Parameter Comparison

Parameter	IRFP264 (IXYS)	IRFP264PBF (Vishay)	IRFP244PBF (Vishay)	STW46NF30 (STMicroelectronics)
Manufacturer	IXYS	Vishay Siliconix	Vishay Siliconix	STMicroelectronics
Product Status	Obsolete	Active	Active	Active
FET Type	N-Channel	N-Channel	N-Channel	N-Channel
Vdss (V)	250	250	250	300
Id @ 25°C (A)	38	38	15	42
Rds On @ 10V (mOhm)	75 @ 23A	75 @ 23A	280 @ 9A	75 @ 17A
Vgs(th) @ 250µA (V)	4	4	4	4
Gate Charge Qg @ 10V (nC)	210	210	63	90
Vgs (Max) (V)	±20	±20	±20	±20
Power Dissipation (W)	280	280	150	300
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 175
Package	TO-247-3	TO-247-3	TO-247-3	TO-247-3
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

IRFP264PBF (Vishay Siliconix) — Direct Equivalent

The IRFP264PBF is the primary direct substitute for the obsolete IRFP264. This part maintains identical electrical specifications across all critical parameters: 250V Vdss, 38A continuous drain current, 75mOhm Rds On, and 280W power dissipation. The device is housed in the same TO-247-3 package and is pin-for-pin compatible. IRFP264PBF is manufactured by Vishay Siliconix and carries Active product status with ROHS3 compliance certification. This part enables direct replacement without circuit modification and is recommended as the primary substitute for new designs and field replacements.

STW46NF30 (STMicroelectronics) — Enhanced Specification Substitute

The STW46NF30 is a functionally compatible substitute that exceeds the electrical requirements of the IRFP264. This device provides higher Vdss (300V versus 250V), higher continuous drain current (42A versus 38A), and greater power dissipation capability (300W versus 280W). The on-state resistance remains equivalent at 75mOhm. The STW46NF30 is housed in TO-247-3 package and is ROHS3 compliant with Active product status. This part is suitable for applications where higher voltage or current margins are beneficial, though it is not required for direct IRFP264 replacement.

IRFP244PBF (Vishay Siliconix) — Reduced Current Substitute

The IRFP244PBF is a similar substitute with reduced electrical ratings. This device maintains 250V Vdss and ±20V gate voltage compatibility but provides only 15A continuous drain current (versus 38A) and 150W power dissipation (versus 280W). The on-state resistance is significantly higher at 280mOhm. IRFP244PBF is suitable only for applications with lower current requirements and is not recommended as a direct replacement for the IRFP264 in designs requiring full 38A capability.

Frequently Asked Questions (FAQ)

Q: Can IRFP264PBF be used as a direct replacement for IRFP264?

A: Yes. IRFP264PBF is a direct equivalent with identical electrical specifications and TO-247-3 package configuration. No circuit modification is required.

Q: What is the primary reason to substitute the IRFP264?

A: The IRFP264 is classified as obsolete. IRFP264PBF from Vishay Siliconix is the active equivalent that maintains full compatibility.

Q: Can STW46NF30 replace IRFP264 in all applications?

A: STW46NF30 meets or exceeds all electrical requirements of IRFP264 and is functionally compatible. However, it is not a direct equivalent due to higher Vdss (300V) and different gate charge characteristics. Verification of application-specific performance is necessary.

Q: Why does IRFP244PBF have higher on-state resistance?

A: IRFP244PBF is rated for lower continuous drain current (15A versus 38A). The higher Rds On (280mOhm versus 75mOhm) reflects its lower current rating and is not suitable for applications requiring 38A operation.

Q: Are all substitute parts RoHS compliant?

A: IRFP264PBF and STW46NF30 are both ROHS3 compliant. The original IRFP264 RoHS status is not specified in available documentation.

Q: What is the difference between TO-247AC and TO-247AD packages?

A: Both are TO-247-3 through-hole packages with identical pin configuration and electrical compatibility. AC and AD designations refer to minor manufacturing variations that do not affect electrical performance or interchangeability.

Q: Can gate charge differences affect circuit performance?

A: Gate charge differences (IRFP264: 210nC, STW46NF30: 90nC) affect gate drive requirements and switching speed. Applications with fixed gate drive circuits should verify compatibility with the substitute part's gate charge specification.

Q: Is input capacitance a critical parameter for substitution?

A: Input capacitance affects switching characteristics and gate drive circuit design. While IRFP264PBF shows slightly higher input capacitance (5400pF versus 4800pF), both values are within compatible ranges for standard gate drive circuits.

Q: What inventory status should be considered for production planning?

A: IRFP264PBF has 21,080 pieces in stock, STW46NF30 has 625,701 pieces in stock, and IRFP244PBF has 1,794 pieces in stock. IRFP264PBF is recommended for direct replacement due to equivalent specifications and adequate inventory availability.

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