STW90NF20 N-Channel MOSFET 200V 83A Equivalent & Substitute Parts

Part Overview

The STW90NF20 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 200V drain-to-source voltage with 83A continuous drain current at 25°C. This device is packaged in TO-247-3 and features the STripFET™ technology platform. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	200	V
Continuous Drain Current (Id) @ 25°C	83	A
On-State Resistance (Rds On) @ 45A, 10V	23	mOhm
Gate Charge (Qg) @ 10V	164	nC
Power Dissipation (Max)	300	W
Operating Temperature Range	-50 to 150	°C
Package Type	TO-247-3
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Input Capacitance (Ciss) @ 25V	5736	pF

Substitute Part Grouping Explanation

Substitution of the STW90NF20 is determined by the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 200V
Continuous Drain Current (Id): Must meet or exceed 83A at 25°C
On-State Resistance (Rds On): Should be comparable to 23mOhm to maintain thermal and efficiency characteristics
Gate Charge (Qg): Lower values reduce switching losses; higher values acceptable if within application tolerance
Power Dissipation: Must support thermal requirements of the application
Operating Temperature Range: Must encompass the application's thermal envelope

Mechanical Matching Criteria:

Mounting Type: Through-hole configuration required
Package Family: TO-247 variants (TO-247-3, TO-247AC, TO-247AD) and TO-3P are mechanically compatible with appropriate PCB layout modifications
Pin Configuration: N-Channel FET with standard gate, drain, and source terminals

All substitute parts listed maintain N-Channel MOSFET topology with 200V Vdss rating and drain current ratings at or above 83A, ensuring functional equivalence within the specified electrical operating window.

Parameter Comparison

Parameter	STW90NF20	IRFP4227PBF	IRFP90N20DPBF	IXFH120N20P	IXFH96N20P	IXTH96N20P	IXTQ120N20P	IXTQ96N20P
Manufacturer	STMicroelectronics	Infineon	Infineon	IXYS	IXYS	IXYS	IXYS	IXYS
Vdss (V)	200	200	200	200	200	200	200	200
Id @ 25°C (A)	83	65	94	120	96	96	120	96
Rds On (mOhm)	23 @ 45A	25 @ 46A	23 @ 56A	22 @ 500mA	24 @ 500mA	24 @ 500mA	22 @ 500mA	24 @ 500mA
Qg @ 10V (nC)	164	98	270	152	145	145	152	145
Ciss @ 25V (pF)	5736	4600	6040	6000	4800	4800	6000	4800
Power Dissipation (W)	300	330	580	714	600	600	714	600
Operating Temp Range (°C)	-50 to 150	-40 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	TO-247-3	TO-247AC	TO-247AC	TO-247AD	TO-247AD	TO-247	TO-3P	TO-3P
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Closest Electrical Match):

The IXTH96N20P and IXFH96N20P provide the closest electrical equivalence to the STW90NF20, with 96A continuous drain current, 24mOhm on-state resistance, and 145nC gate charge. Both devices are active products with ROHS3 compliance. The IXTH96N20P maintains the standard TO-247 package footprint, while the IXFH96N20P uses the TO-247AD variant. These parts accommodate the 83A requirement with minimal performance margin.

The IRFP90N20DPBF from Infineon offers 94A continuous drain current with matching 23mOhm on-state resistance and active product status. This part provides superior thermal performance at 580W power dissipation and extended operating temperature range (-55°C to 175°C). The TO-247AC package requires PCB layout verification for pin compatibility.

Secondary Substitutes (Higher Current Rating):

The IXFH120N20P and IXTQ120N20P deliver 120A continuous drain current with 22mOhm on-state resistance, providing additional current margin and improved thermal characteristics (714W power dissipation). These parts are suitable for applications requiring enhanced reliability or future current growth. The IXFH120N20P uses TO-247AD packaging, while the IXTQ120N20P uses TO-3P packaging, requiring mechanical redesign.

Lower Current Alternative:

The IRFP4227PBF from Infineon provides 65A continuous drain current, which falls below the STW90NF20 specification. This part is suitable only for applications where the actual operating current is confirmed below 65A and where the 330W power dissipation is adequate.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory posture. All listed substitutes are active products with confirmed inventory availability, eliminating obsolescence risk associated with the STW90NF20.

Frequently Asked Questions (FAQ)

Q: Can the IRFP4227PBF substitute for the STW90NF20 in all applications?

A: No. The IRFP4227PBF is rated for 65A continuous drain current, which is below the STW90NF20's 83A specification. This part is suitable only for applications where the actual operating current is confirmed to remain below 65A throughout all operating conditions.

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

A: All variants are through-hole TO-247 family packages with three terminals (gate, drain, source). The primary differences are in pin spacing and mechanical dimensions. TO-247-3 is the standard variant. TO-247AC and TO-247AD are Infineon and IXYS variants respectively with slightly different pin configurations. TO-247 (IXTH) is the IXYS standard variant. PCB layout modifications may be required when switching between variants.

Q: Are TO-3P packages (IXTQ120N20P, IXTQ96N20P) compatible with TO-247-3 PCB layouts?

A: No. TO-3P is a different package family with different pin spacing and mechanical dimensions. Designs using TO-3P packages require PCB redesign and mechanical modifications to the heatsink mounting structure.

Q: Which substitute part offers the best thermal performance?

A: The IRFP90N20DPBF provides 580W power dissipation, and the IXFH120N20P and IXTQ120N20P each provide 714W power dissipation. These exceed the STW90NF20's 300W rating, offering superior thermal headroom for high-power applications.

Q: Do all substitute parts support the same operating temperature range as the STW90NF20?

A: No. The STW90NF20 operates from -50°C to 150°C. All substitute parts extend the upper temperature limit to 175°C. The IRFP90N20DPBF and IXYS parts extend the lower limit to -55°C. Applications requiring operation below -50°C must verify compatibility with the specific substitute part's lower temperature limit.

Q: What is the significance of gate charge (Qg) differences between parts?

A: Gate charge affects switching speed and driver power requirements. The IRFP4227PBF has the lowest gate charge at 98nC, reducing switching losses. The IRFP90N20DPBF has the highest at 270nC. For most applications, differences within this range are accommodated by standard gate driver circuits. High-frequency switching applications should verify driver capability with the selected substitute's gate charge specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original STW90NF20.

Q: Which substitute provides the closest on-state resistance match?

A: The IRFP90N20DPBF and IXFH120N20P/IXTQ120N20P provide 23mOhm and 22mOhm respectively, closely matching the STW90NF20's 23mOhm specification. The IXFH96N20P, IXTH96N20P, and IXTQ96N20P provide 24mOhm, representing a 4% increase in on-state resistance.

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