STW75NF20 N-Channel MOSFET 200V 75A TO-247-3 Equivalent & Substitute Parts

Part Overview

The STW75NF20 is an N-Channel MOSFET manufactured by STMicroelectronics in the STripFET™ series. This device is rated for 200V drain-to-source voltage with 75A continuous drain current at 25°C and 190W maximum power dissipation. The component is housed in a TO-247-3 through-hole package and maintains Active product status with full RoHS3 compliance.

Equivalent and substitute parts are identified based on matching or exceeding critical electrical parameters while maintaining compatible package configurations. Substitution becomes necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative performance characteristics within the same voltage and current class.

Key Parameters

Parameter	STW75NF20	Unit
Drain-to-Source Voltage (Vdss)	200	V
Continuous Drain Current (Id) @ 25°C	75	A
On-State Resistance (Rds On) @ 37A, 10V	34	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	84	nC
Input Capacitance (Ciss) @ 25V	3260	pF
Power Dissipation (Max)	190	W
Operating Temperature Range	-50 to 150	°C
Package Type	TO-247-3	—
FET Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitution logic for the STW75NF20 is based on the following critical parameters:

Electrical Compatibility Requirements:

Drain-to-Source Voltage (Vdss) must equal or exceed 200V
Continuous Drain Current (Id) must equal or exceed 75A at 25°C
Gate Threshold Voltage (Vgs(th)) must be compatible with 10V drive voltage
On-State Resistance (Rds On) should not significantly exceed 34mOhm to maintain thermal performance
Maximum Gate Voltage (Vgs) must accommodate ±20V operation

Mechanical Compatibility Requirements:

Package must be TO-247-3 or compatible TO-247 variant (TO-247AC, TO-247AD)
Through-hole mounting configuration required
Pin configuration must support direct substitution

Compliance Requirements:

RoHS3 compliance mandatory
Moisture Sensitivity Level (MSL) of 1 (Unlimited) required
Active product status preferred

Substitute parts are grouped into two categories: direct TO-247-3 package equivalents and compatible TO-247 variant packages that maintain electrical and thermal performance within acceptable design margins.

Parameter Comparison

Parameter	STW75NF20	IRFP260NPBF	IRFP4227PBF	IRFP90N20DPBF	IXFH120N20P	IXFH96N20P	IXTH60N20L2	IXTH96N20P	IXTQ74N20P	IXTQ120N20P
Manufacturer	STMicroelectronics	Infineon	Infineon	Infineon	IXYS	IXYS	IXYS	IXYS	IXYS	IXYS
Vdss (V)	200	200	200	200	200	200	200	200	200	200
Id @ 25°C (A)	75	50	65	94	120	96	60	96	74	120
Rds On (mOhm)	34 @ 37A	40 @ 28A	25 @ 46A	23 @ 56A	22 @ 500mA	24 @ 500mA	45 @ 30A	24 @ 500mA	34 @ 37A	22 @ 500mA
Vgs(th) (V)	4 @ 250µA	4 @ 250µA	5 @ 250µA	5 @ 250µA	5 @ 4mA	5 @ 4mA	4.5 @ 250µA	5 @ 250µA	5 @ 250µA	5 @ 250µA
Qg @ 10V (nC)	84	234	98	270	152	145	255	145	107	152
Ciss @ 25V (pF)	3260	4057	4600	6040	6000	4800	10500	4800	3300	6000
Power Dissipation (W)	190	300	330	580	714	600	540	600	480	714
Operating Temp (°C)	-50 to 150	-55 to 175	-40 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 150	-55 to 175	-55 to 175	-55 to 175
Package	TO-247-3	TO-247AC	TO-247AC	TO-247AC	TO-247AD	TO-247AD	TO-247	TO-247	TO-3P	TO-3P
RoHS3 Compliant	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MSL Rating	1	1	1	1	1	1	1	1	1	1

Engineering Selection Recommendations

Direct TO-247-3 Package Substitutes (Preferred for Pin-Compatible Replacement):

IXTQ74N20P and IXTQ120N20P are housed in TO-3P packages with equivalent pin configurations to TO-247-3. The IXTQ74N20P provides 74A continuous drain current with 34mOhm on-state resistance, matching the STW75NF20 electrical profile closely. The IXTQ120N20P offers higher current capability at 120A with improved on-state resistance of 22mOhm, suitable for applications requiring thermal margin. Both devices maintain -55°C to 175°C operating temperature range and carry full RoHS3 compliance with MSL 1 rating.

TO-247 Variant Substitutes (Compatible with PCB Layout Adaptation):

IXTH96N20P (TO-247 IXTH package) and IXFH96N20P (TO-247AD IXFH package) both deliver 96A continuous drain current, exceeding the STW75NF20 specification. These devices feature 24mOhm on-state resistance and 145nC gate charge, providing improved switching performance. IRFP90N20DPBF (TO-247AC) offers 94A current rating with 23mOhm resistance and extended thermal capability at 580W power dissipation.

Lower Current Alternatives (For Derating Applications):

IRFP260NPBF (TO-247AC) provides 50A continuous drain current with 40mOhm on-state resistance. This device is suitable for applications where the full 75A capability is not required and cost optimization is prioritized. IXTH60N20L2 (TO-247 IXTH) delivers 60A with 45mOhm resistance, appropriate for moderate current applications.

Higher Current Alternatives (For Thermal Margin):

IXFH120N20P and IXTQ120N20P both provide 120A continuous drain current with 22mOhm on-state resistance and 714W power dissipation, offering significant thermal headroom for demanding applications. IRFP4227PBF (TO-247AC) delivers 65A with superior 25mOhm on-state resistance and 330W power dissipation.

All recommended substitutes maintain RoHS3 compliance, MSL 1 rating, and Active product status. Selection should account for PCB layout compatibility with specific TO-247 package variants and thermal management requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can IXTQ74N20P directly replace STW75NF20 without PCB modification?

A: IXTQ74N20P uses TO-3P package while STW75NF20 uses TO-247-3. Although both are through-hole packages with three leads, the pin spacing and physical dimensions differ. PCB layout modification is required for direct substitution. Pin configuration compatibility must be verified against specific application schematics.

Q: What is the difference between TO-247-3, TO-247AC, and TO-247AD packages?

A: All three are TO-247 family variants with identical electrical pin configurations but different mechanical specifications. TO-247-3 is the standard variant. TO-247AC and TO-247AD feature improved thermal characteristics and slightly different lead geometries. Substitution between these variants requires PCB layout verification to confirm pad spacing compatibility.

Q: Why does IRFP260NPBF have lower current rating (50A) than STW75NF20 (75A)?

A: IRFP260NPBF is rated for 50A continuous drain current, which is below the STW75NF20 specification of 75A. This device is suitable only for applications where the design current requirement does not exceed 50A. For full 75A operation, higher-rated alternatives such as IXTQ74N20P, IXTH96N20P, or IRFP90N20DPBF must be selected.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the STW75NF20 environmental and regulatory specifications.

Q: What does on-state resistance (Rds On) mean for substitution?

A: On-state resistance determines power dissipation during device conduction. Lower Rds On values reduce heat generation. The STW75NF20 specifies 34mOhm at 37A and 10V gate voltage. Substitute parts with equal or lower Rds On values provide equivalent or improved thermal performance. Higher Rds On values increase power dissipation and may require enhanced cooling.

Q: Can I use IXFH120N20P in a design originally specified for STW75NF20?

A: IXFH120N20P is electrically compatible with 200V Vdss and exceeds the 75A current requirement at 120A. However, the TO-247AD package requires PCB layout verification. The device's higher power dissipation capability (714W vs. 190W) and lower Rds On (22mOhm) make it suitable for applications requiring thermal margin. Gate charge (152nC) is higher than STW75NF20 (84nC), which may affect switching speed in high-frequency applications.

Q: What is gate charge (Qg) and why does it matter for substitution?

A: Gate charge represents the total charge required to switch the MOSFET from off to on state. Higher gate charge increases switching losses and requires stronger gate drive circuits. STW75NF20 specifies 84nC at 10V. Substitute parts with significantly higher gate charge (such as IRFP260NPBF at 234nC or IRFP90N20DPBF at 270nC) may require gate driver circuit redesign to maintain switching performance.

Q: Is operating temperature range important for substitution?

A: Yes. STW75NF20 operates from -50°C to 150°C. Most substitute parts extend the upper limit to 175°C, providing additional thermal margin. However, if the application operates below -50°C, substitute parts with -55°C minimum rating (such as IRFP90N20DPBF, IXFH96N20P, IXTH96N20P, IXTQ74N20P, and IXTQ120N20P) are required for full temperature range coverage.

Q: What is input capacitance (Ciss) and how does it affect substitution?

A: Input capacitance affects gate drive requirements and switching speed. STW75NF20 specifies 3260pF at 25V. Substitute parts with higher Ciss values (such as IXTH60N20L2 at 10500pF) require stronger gate drive circuits and may increase switching losses. Lower Ciss values improve switching performance but are not critical for most applications.

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