IXFX150N15 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IXFX150N15 is an N-Channel MOSFET manufactured by IXYS, rated for 150V drain-to-source voltage and 150A continuous drain current at 25°C. This device is part of the HiPerFET™ series and features a PLUS247™-3 package configuration for through-hole mounting applications. The product status is listed as Not For New Designs, indicating that while the component remains available in inventory (1420 pcs), IXYS has discontinued active development and support for this model. Identifying equivalent and substitute parts is necessary for design continuity, long-term supply chain planning, and applications requiring active product support or enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	150	V
Continuous Drain Current (Id) @ 25°C	150	A (Tc)
On-State Resistance (Rds On Max) @ Id, Vgs	12.5 mOhm @ 75A, 10V	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ Id	4	V @ 8mA
Gate Charge (Qg Max) @ Vgs	360	nC @ 10V
Power Dissipation (Max)	560	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	PLUS247™-3 / TO-247-3	Through Hole
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the IXFX150N15 is determined by the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 150V
Package Type: Must be compatible with TO-247-3 or PLUS247™-3 through-hole mounting
FET Type: N-Channel MOSFET technology
Gate Drive Voltage: 10V maximum Rds On specification

Secondary Compatibility Factors:

Continuous Drain Current (Id): Substitute must support the application's current requirements
On-State Resistance (Rds On): Lower values indicate improved performance; higher values require thermal management verification
Gate Charge (Qg): Affects switching speed and driver circuit requirements
Operating Temperature Range: Must accommodate the application's thermal environment
Regulatory Compliance: RoHS3 and REACH status for environmental standards

The substitute parts identified below meet the primary matching criteria and provide either equivalent or enhanced performance characteristics within the specified parameter ranges.

Parameter Comparison

Parameter	IXFX150N15	IXFX240N15T2	IRFP4321PBF	Unit
Manufacturer	IXYS	IXYS	Infineon Technologies	—
Product Status	Not For New Designs	Active	Active	—
Drain-to-Source Voltage (Vdss)	150	150	150	V
Continuous Drain Current (Id) @ 25°C	150	240	78	A (Tc)
On-State Resistance (Rds On Max)	12.5 @ 75A, 10V	5.2 @ 60A, 10V	15.5 @ 33A, 10V	mOhm
Gate Threshold Voltage (Vgs(th) Max)	4 @ 8mA	5 @ 8mA	5 @ 250µA	V
Gate Charge (Qg Max) @ 10V	360	460	110	nC
Input Capacitance (Ciss Max) @ 25V	9100	32000	4460	pF
Power Dissipation (Max)	560	1250	310	W (Tc)
Operating Temperature Range	-55 to 150	-55 to 175	-55 to 175	°C (TJ)
Package Type	PLUS247™-3	PLUS247™-3	TO-247AC	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

IXFX240N15T2 (IXYS)

The IXFX240N15T2 is the primary substitute for the IXFX150N15. Both devices are manufactured by IXYS and share identical voltage ratings (150V Vdss) and package configuration (PLUS247™-3). The IXFX240N15T2 offers superior performance with 240A continuous drain current (versus 150A), lower on-state resistance (5.2 mOhm versus 12.5 mOhm), and higher power dissipation capability (1250W versus 560W). The IXFX240N15T2 carries Active product status, ensuring ongoing manufacturer support and supply chain availability. Operating temperature range extends to 175°C (versus 150°C), providing enhanced thermal margin. Both devices maintain ROHS3 compliance and MSL-1 rating. This substitute is suitable for direct replacement in applications where the increased current capacity and improved thermal performance provide design benefits.

IRFP4321PBF (Infineon Technologies)

The IRFP4321PBF is an alternative substitute manufactured by Infineon Technologies under the HEXFET® series. It maintains the 150V Vdss rating and through-hole TO-247AC package configuration, which is mechanically compatible with TO-247-3 applications. The IRFP4321PBF is rated for 78A continuous drain current, which is lower than the IXFX150N15 (150A). On-state resistance is 15.5 mOhm (higher than the original 12.5 mOhm), and power dissipation is limited to 310W. However, the IRFP4321PBF carries Active product status and supports extended operating temperature to 175°C. Gate charge is significantly lower (110 nC versus 360 nC), resulting in faster switching characteristics and reduced driver circuit stress. This substitute is appropriate for applications with lower current requirements or where switching speed is prioritized over continuous current capacity. ROHS3 compliance and MSL-1 rating are maintained.

Product Status Consideration

The IXFX150N15 is designated Not For New Designs. For new product development, the IXFX240N15T2 (Active status) is the recommended selection. For legacy system maintenance or replacement scenarios, either substitute provides viable alternatives based on specific application current and thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the IXFX240N15T2 directly replace the IXFX150N15 in existing designs?

A: Yes. Both devices share identical voltage ratings (150V Vdss), gate drive specifications (10V), and package configuration (PLUS247™-3). The IXFX240N15T2 provides enhanced performance with higher current capacity (240A versus 150A) and lower on-state resistance (5.2 mOhm versus 12.5 mOhm). No circuit modifications are required for direct substitution.

Q: What are the package compatibility considerations between PLUS247™-3 and TO-247AC?

A: Both PLUS247™-3 and TO-247AC are through-hole packages with identical pin configurations and mechanical footprints. The IRFP4321PBF (TO-247AC) is mechanically compatible with PLUS247™-3 PCB layouts. However, verify thermal management requirements, as the IRFP4321PBF has lower power dissipation capability (310W versus 560W for the original part).

Q: Why does the IXFX240N15T2 have higher gate charge (460 nC) compared to the IXFX150N15 (360 nC)?

A: Gate charge correlates with die size and current capacity. The IXFX240N15T2 supports 240A continuous current versus 150A, requiring a larger silicon die. Higher gate charge increases switching time and driver circuit power consumption but does not affect DC operating characteristics or substitution feasibility.

Q: Is the IRFP4321PBF suitable for applications requiring 150A continuous current?

A: No. The IRFP4321PBF is rated for 78A continuous drain current, which is insufficient for applications requiring the original IXFX150N15's 150A specification. The IXFX240N15T2 is the appropriate substitute for current-critical applications.

Q: Do all three devices maintain RoHS3 and REACH compliance?

A: Yes. The IXFX150N15, IXFX240N15T2, and IRFP4321PBF are all ROHS3 compliant and REACH unaffected. All devices carry MSL-1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Q: What is the significance of the IXFX150N15's Not For New Designs status?

A: This designation indicates that IXYS has discontinued active development and support for this model. While inventory remains available (1420 pcs), the manufacturer does not recommend this part for new product designs. The IXFX240N15T2 (Active status) is the preferred choice for new development to ensure long-term supply chain support and access to design documentation.

Q: How do operating temperature ranges affect substitution decisions?

A: The IXFX150N15 operates from -55°C to 150°C, while both substitutes extend to 175°C. For applications operating near the upper temperature limit of the original part, the extended range of the IXFX240N15T2 or IRFP4321PBF provides additional thermal margin and design safety.

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