IXFC74N20P N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IXFC74N20P is an N-Channel 200V 35A MOSFET manufactured by IXYS in the ISOPLUS220™ package. This device is rated for 120W power dissipation and operates across a temperature range of -55°C to 175°C. The part is currently classified as obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity. Substitute parts listed below maintain the core electrical specifications while offering alternative packaging and enhanced performance characteristics from active manufacturers.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	200	V
Continuous Drain Current (Id) @ 25°C	35	A
Drive Voltage (Max Rds On)	10	V
Rds On (Max) @ Id, Vgs	36	mOhm
Gate Threshold Voltage Vgs(th) (Max)	5	V @ 4mA
Gate Charge (Qg) (Max) @ Vgs	107	nC @ 10V
Maximum Gate Voltage (Vgs)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	3300	pF @ 25V
Power Dissipation (Max)	120	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Through Hole	—
Package Type	ISOPLUS220™	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the IXFC74N20P is determined by the following core electrical and mechanical parameters:

Critical Matching Parameters:

Drain to Source Voltage (Vdss): 200V (exact match required)
FET Type: N-Channel (exact match required)
Technology: MOSFET Metal Oxide (exact match required)
Mounting Type: Through Hole (exact match required)
Drive Voltage: 10V (exact match required)
Maximum Gate Voltage (Vgs): ±20V minimum (substitute must support this range)

Allowable Variation Parameters:

Continuous Drain Current (Id): Substitute must equal or exceed 35A
Rds On (Max): Substitute must equal or be lower than 36mOhm
Gate Charge (Qg): Substitute may vary within acceptable switching performance limits
Input Capacitance (Ciss): Substitute may vary within acceptable circuit performance limits
Power Dissipation: Substitute may equal or exceed 120W
Operating Temperature: Substitute must support minimum -55°C to 175°C range or equivalent thermal envelope
Package: Alternative through-hole packages (TO-220AB, TO-220FM, TO-220FL, TO-220FP) are acceptable

All substitute parts listed below meet these criteria and are sourced from active manufacturers with current product status and full compliance certifications.

Parameter Comparison

Parameter	IXFC74N20P (Main)	PSMN057-200P,127	RCX700N20	RJK2017DPP-M0#T2	STF40NF20
Manufacturer	IXYS	Nexperia USA Inc.	Rohm Semiconductor	Renesas Electronics	STMicroelectronics
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel
Vdss	200V	200V	200V	200V	200V
Id @ 25°C	35A	39A	70A	45A	40A
Drive Voltage	10V	10V	10V	10V	10V
Rds On (Max) @ Id, Vgs	36mOhm @ 37A, 10V	57mOhm @ 17A, 10V	42.7mOhm @ 35A, 10V	47mOhm @ 22.5A, 10V	45mOhm @ 20A, 10V
Vgs(th) (Max) @ Id	5V @ 4mA	4V @ 1mA	5V @ 1mA	4V @ 1mA	4V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	107nC @ 10V	96nC @ 10V	125nC @ 10V	66nC @ 10V	75nC @ 10V
Vgs (Max)	±20V	±20V	±30V	±30V	±20V
Ciss (Max) @ Vds	3300pF @ 25V	3750pF @ 25V	6900pF @ 25V	4800pF @ 25V	2500pF @ 25V
Power Dissipation (Max)	120W	250W	40W	30W	40W
Operating Temperature	-55 to 175°C	-55 to 175°C	150°C (TJ)	150°C (TJ)	-55 to 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package	ISOPLUS220™	TO-220AB	TO-220FM	TO-220FL	TO-220FP
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

PSMN057-200P,127 (Nexperia USA Inc.)

The PSMN057-200P,127 is an active product with ROHS3 compliance and identical voltage and drive specifications to the IXFC74N20P. It provides 39A continuous drain current, exceeding the 35A requirement, with 57mOhm maximum on-resistance. The TO-220AB package is a standard through-hole alternative to ISOPLUS220™. Operating temperature range matches the original part (-55°C to 175°C). This substitute is suitable for direct replacement in applications where package footprint modification is acceptable.

RCX700N20 (Rohm Semiconductor)

The RCX700N20 is an active product with ROHS3 compliance offering the highest continuous drain current at 70A, providing significant current margin above the 35A specification. The TO-220FM package is a through-hole alternative. Maximum on-resistance of 42.7mOhm at 35A, 10V is acceptable. Operating temperature maximum of 150°C is lower than the original specification. This substitute is appropriate for applications requiring enhanced current capacity and thermal performance.

RJK2017DPP-M0#T2 (Renesas Electronics Corporation)

The RJK2017DPP-M0#T2 is an active product with ROHS3 compliance providing 45A continuous drain current. The TO-220FL package is a through-hole alternative. Gate charge of 66nC is lower than the original 107nC, resulting in faster switching characteristics. Maximum gate voltage support of ±30V exceeds the ±20V requirement. Operating temperature maximum of 150°C is lower than the original specification. This substitute is suitable for applications benefiting from reduced gate charge and improved switching performance.

STF40NF20 (STMicroelectronics)

The STF40NF20 is an active product with ROHS3 compliance from the STripFET™ series providing 40A continuous drain current. The TO-220FP package is a through-hole alternative. Maximum on-resistance of 45mOhm at 20A, 10V is acceptable. Input capacitance of 2500pF is lower than the original 3300pF. Operating temperature range of -55°C to 150°C is lower at the maximum. This substitute is appropriate for applications where lower input capacitance and switching losses are beneficial.

Frequently Asked Questions (FAQ)

Q: Can the IXFC74N20P be directly replaced with any of these substitute parts?

A: Direct replacement requires PCB layout modification due to package differences. The IXFC74N20P uses ISOPLUS220™ packaging, while all substitutes use standard TO-220 variants (TO-220AB, TO-220FM, TO-220FL, TO-220FP). Pin configurations and thermal pad locations differ. Electrical functionality is compatible when drive voltage, gate voltage, and current requirements are met.

Q: What is the primary reason for substitution?

A: The IXFC74N20P is classified as obsolete. All substitute parts are active products from established manufacturers with current production status and full compliance certifications (ROHS3), ensuring long-term availability and supply chain continuity.

Q: Are all substitute parts rated for the same voltage?

A: Yes. All substitute parts are rated for 200V Drain to Source Voltage (Vdss), matching the original IXFC74N20P specification exactly.

Q: Which substitute provides the closest electrical match?

A: The PSMN057-200P,127 provides the closest match with identical operating temperature range (-55°C to 175°C), matching gate voltage limits (±20V), and comparable on-resistance characteristics. It also maintains the same drive voltage specification of 10V.

Q: Do all substitutes support the same gate voltage range?

A: The IXFC74N20P, PSMN057-200P,127, and STF40NF20 all support ±20V maximum gate voltage. The RCX700N20 and RJK2017DPP-M0#T2 support ±30V, providing additional margin. All substitutes are compatible with ±20V gate drive circuits.

Q: What are the package footprint differences?

A: ISOPLUS220™ (original) is a proprietary IXYS package. TO-220AB, TO-220FM, TO-220FL, and TO-220FP are industry-standard through-hole packages with different thermal pad configurations and pin spacing. PCB redesign is required for any substitution.

Q: Which substitute has the lowest on-resistance?

A: The IXFC74N20P has 36mOhm on-resistance at 37A, 10V. Among substitutes, the RCX700N20 has 42.7mOhm at 35A, 10V, providing the closest performance. Lower on-resistance reduces power dissipation in switching applications.

Q: Are there temperature range limitations with any substitute?

A: The IXFC74N20P operates from -55°C to 175°C. The RCX700N20, RJK2017DPP-M0#T2, and STF40NF20 have maximum operating temperatures of 150°C, which is 25°C lower. Applications requiring operation above 150°C require the PSMN057-200P,127, which matches the full temperature range.

Q: Which substitute offers the best switching performance?

A: The RJK2017DPP-M0#T2 has the lowest gate charge at 66nC, compared to the original 107nC, resulting in faster switching transitions and reduced switching losses. The STF40NF20 also offers improved switching with 75nC gate charge and lower input capacitance of 2500pF.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitute parts are ROHS3 compliant. The original IXFC74N20P RoHS status is not specified in the provided data.

Q: Can I use a substitute with higher current rating?

A: Yes. The RCX700N20 (70A) and RJK2017DPP-M0#T2 (45A) exceed the 35A requirement and are suitable for applications requiring higher current capacity. Higher current ratings provide design margin and thermal headroom.

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