IXFX24N100 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IXFX24N100 is an N-Channel 1000V, 24A continuous drain current MOSFET manufactured by IXYS in the HiPerFET™ series. This device is packaged in the PLUS247™-3 (TO-247-3 variant) through-hole configuration and is rated for 560W maximum power dissipation at the case temperature. The IXFX24N100 carries a product status of "Not For New Designs," indicating it is a legacy component. Identification of equivalent and substitute parts is necessary for applications requiring continued support, design flexibility, or inventory optimization while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	1000	V
Continuous Drain Current (Id) @ 25°C	24	A (Tc)
On-State Resistance (Rds On Max) @ 12A, 10V	390	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 8mA	5.5	V
Gate Charge (Qg Max) @ 10V	267	nC
Input Capacitance (Ciss Max) @ 25V	8700	pF
Power Dissipation (Max)	560	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-247-3 Variant	—

Substitute Part Grouping Explanation

Substitution of the IXFX24N100 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): Must equal or exceed 1000V
Continuous Drain Current (Id): Must equal or exceed 24A at 25°C case temperature
On-State Resistance (Rds On): Must not exceed 390mOhm at the specified gate voltage and current conditions
Gate Threshold Voltage (Vgs(th)): Must be compatible with 10V drive voltage
Mounting Type: Must be through-hole configuration
Package: Must be compatible with TO-247-3 footprint

Substitution Logic: Parts meeting or exceeding the IXFX24N100 electrical specifications while maintaining through-hole TO-247-3 package compatibility are classified as direct substitutes. Parts with lower voltage ratings (950V), reduced current ratings (17.5A), or lower power dissipation (250W) are classified as partial or conditional substitutes and are suitable only for applications with reduced electrical demands.

Parameter Comparison

Parameter	IXFX24N100	IXFX32N100P	STW20N95K5	STW22N95K5	STWA20N95K5
Manufacturer	IXYS	IXYS	STMicroelectronics	STMicroelectronics	STMicroelectronics
Vdss (V)	1000	1000	950	950	950
Id @ 25°C (A)	24	32	17.5	17.5	17.5
Rds On Max (mOhm)	390 @ 12A, 10V	320 @ 16A, 10V	330 @ 9A, 10V	330 @ 9A, 10V	330 @ 9A, 10V
Vgs(th) Max (V)	5.5 @ 8mA	6.5 @ 1mA	5 @ 100µA	5 @ 100µA	5 @ 100µA
Qg Max (nC)	267 @ 10V	225 @ 10V	40 @ 10V	48 @ 10V	40 @ 10V
Ciss Max (pF)	8700 @ 25V	14200 @ 25V	1500 @ 100V	1550 @ 100V	1500 @ 100V
Power Dissipation Max (W)	560	960	250	250	250
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package	PLUS247™-3	PLUS247™-3	TO-247-3	TO-247-3	TO-247 Long Leads
Product Status	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Full Substitution):

The IXFX32N100P is the primary direct equivalent for the IXFX24N100. Both devices are manufactured by IXYS, operate at 1000V Vdss, feature the PLUS247™-3 package, and maintain through-hole mounting. The IXFX32N100P exceeds the IXFX24N100 in continuous drain current (32A versus 24A) and power dissipation (960W versus 560W), making it suitable for applications requiring equal or greater electrical performance. The IXFX32N100P carries an "Active" product status, ensuring continued availability and support. Both devices are ROHS3 compliant and operate across the identical temperature range (-55°C to 150°C).

Conditional Substitutes (Reduced Electrical Performance):

The STW20N95K5, STW22N95K5, and STWA20N95K5 are STMicroelectronics SuperMESH5™ series devices that operate at 950V Vdss and 17.5A continuous drain current. These parts are suitable only for applications where the reduced voltage rating (50V lower than the IXFX24N100) and reduced current rating (6.5A lower than the IXFX24N100) are acceptable. All three STMicroelectronics substitutes carry "Active" product status and ROHS3 compliance. The STW22N95K5 includes AEC-Q101 automotive qualification. The STWA20N95K5 features TO-247 long leads, which may require PCB layout adjustment compared to standard TO-247-3 packages.

Compliance and Regulatory Status:

All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the IXFX24N100. All devices operate within the -55°C to 150°C temperature range and carry Moisture Sensitivity Level 1 (unlimited shelf life).

Frequently Asked Questions (FAQ)

Q: Can the IXFX32N100P directly replace the IXFX24N100 in existing designs?

A: Yes. The IXFX32N100P is a direct equivalent with superior electrical specifications. Both devices share the PLUS247™-3 package, 1000V Vdss rating, through-hole mounting, and identical operating temperature range. The IXFX32N100P's higher current rating (32A versus 24A) and power dissipation (960W versus 560W) make it suitable for all applications currently using the IXFX24N100.

Q: What are the key differences between the IXYS and STMicroelectronics substitute options?

A: The IXFX32N100P maintains the 1000V voltage rating of the original IXFX24N100, while the STMicroelectronics options (STW20N95K5, STW22N95K5, STWA20N95K5) operate at 950V. The STMicroelectronics devices also feature significantly lower continuous drain current (17.5A versus 24A or 32A) and reduced power dissipation (250W versus 560W or 960W). STMicroelectronics substitutes are suitable only for applications with reduced electrical demands.

Q: Are there package compatibility concerns when substituting these parts?

A: The IXFX24N100 and IXFX32N100P both use the PLUS247™-3 package, which is compatible with standard TO-247-3 footprints. The STW20N95K5, STW22N95K5, and STWA20N95K5 use standard TO-247-3 or TO-247 long leads packages. The STWA20N95K5 features longer leads, which may require PCB layout verification. All devices are through-hole mounted and compatible with existing through-hole assembly processes.

Q: Why is the IXFX24N100 marked as "Not For New Designs"?

A: The "Not For New Designs" status indicates the IXFX24N100 is a legacy component. IXYS recommends the IXFX32N100P for new designs. However, the IXFX24N100 remains available for existing applications and design support. The IXFX32N100P provides superior performance and active manufacturer support.

Q: Can STMicroelectronics parts substitute for IXYS parts in high-voltage applications?

A: STMicroelectronics substitutes operate at 950V, which is 50V lower than the IXFX24N100's 1000V rating. For applications operating near the 1000V limit, the reduced voltage rating may not be acceptable. For applications with design margins below 950V, STMicroelectronics parts are suitable. The IXFX32N100P maintains the full 1000V rating and is the preferred choice for high-voltage applications.

Q: What is the significance of the STW22N95K5's AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the STW22N95K5 meets automotive industry reliability and quality standards. This qualification is relevant only for automotive applications. For non-automotive applications, the STW20N95K5 and STWA20N95K5 provide equivalent electrical performance without automotive-specific requirements.

Q: How do gate charge differences affect circuit design when substituting parts?

A: The IXFX24N100 has a gate charge of 267nC, while the IXFX32N100P has 225nC and STMicroelectronics parts have 40-48nC. Lower gate charge reduces driver power requirements and switching losses. When substituting to parts with significantly lower gate charge (STMicroelectronics options), gate driver circuits may require adjustment to ensure proper switching performance. The IXFX32N100P's lower gate charge (225nC) provides improved efficiency with minimal circuit redesign.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The IXFX24N100, IXFX32N100P, STW20N95K5, STW22N95K5, and STWA20N95K5 are all ROHS3 compliant. All parts are REACH unaffected and carry EAR99 ECCN classification, ensuring regulatory compatibility across applications.

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