STB75N20 Equivalent & Substitute Parts

Part Overview

The STB75N20 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 200V drain-to-source voltage with 75A continuous drain current at 25°C. The device is housed in a D2PAK (TO-263-3) surface mount package and is part of the STripFET™ series. The STB75N20 is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, on-resistance characteristics, and thermal performance while accommodating the D2PAK package form factor.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	200	V
Continuous Drain Current (Id) @ 25°C	75	A (Tc)
On-Resistance (Rds On Max) @ 37A, 10V	34	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	4	V
Gate Charge (Qg Max) @ 10V	84	nC
Input Capacitance (Ciss Max) @ 25V	3260	pF
Power Dissipation (Max)	190	W (Tc)
Operating Temperature Range	-50 to 150	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the STB75N20 are classified based on electrical parameter compatibility within the N-Channel MOSFET category. The primary substitution criteria are:

Critical Parameters for Substitution:

Drain-to-Source Voltage (Vdss): Must equal or exceed 200V
Continuous Drain Current (Id): Must support 75A or higher at 25°C
On-Resistance (Rds On): Must not exceed 34mOhm at specified gate voltage
Package Type: Must be D2PAK or equivalent TO-263 variant
Gate Drive Voltage: Must be compatible with 10V drive specification
Thermal Performance: Power dissipation capability must support application requirements

Parametric Equivalent: The STB75NF20 is a direct parametric equivalent manufactured by STMicroelectronics. It maintains identical electrical specifications across all critical parameters and is available in active product status with improved packaging options (Cut Tape and Digi-Reel®).

Similar Substitutes: The IXTA86N20T, IXTA60N20T, and PSMN057-200B,118 are similar devices that share the 200V voltage rating and D2PAK package but differ in continuous drain current capacity and on-resistance characteristics. These parts are suitable for applications where the specific current or thermal requirements differ from the original design.

Parameter Comparison

Parameter	STB75N20	STB75NF20	IXTA86N20T	IXTA60N20T	PSMN057-200B,118
Manufacturer	STMicroelectronics	STMicroelectronics	IXYS	IXYS	Nexperia USA Inc.
Vdss (V)	200	200	200	200	200
Id @ 25°C (A)	75	75	86	60	39
Rds On Max (mOhm)	34 @ 37A, 10V	34 @ 37A, 10V	29 @ 500mA, 10V	40 @ 30A, 10V	57 @ 17A, 10V
Vgs(th) Max (V)	4 @ 250µA	4 @ 250µA	5 @ 1mA	5 @ 250µA	4 @ 1mA
Qg Max @ 10V (nC)	84	84	90	73	96
Ciss Max @ 25V (pF)	3260	3260	4500	4530	3750
Power Dissipation Max (W)	190	190	480	500	250
Operating Temperature (°C)	-50 to 150	-50 to 150	-55 to 175	Not specified	-55 to 175
Package	D2PAK (TO-263-3)	D2PAK (TO-263-3)	TO-263AA	TO-263AA	D2PAK (TO-263-3)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: STB75NF20

The STB75NF20 is the preferred substitute for the obsolete STB75N20. This part is manufactured by STMicroelectronics and maintains identical electrical specifications across all critical parameters: 200V Vdss, 75A continuous drain current, 34mOhm on-resistance, and 190W power dissipation. The STB75NF20 is in active product status, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited), and both are available in D2PAK packaging. The STB75NF20 offers additional packaging flexibility through Digi-Reel® availability alongside standard Cut Tape options.

Secondary Recommendations: IXTA86N20T, IXTA60N20T, PSMN057-200B,118

These parts are suitable for applications where design parameters permit deviation from the original STB75N20 specifications:

IXTA86N20T: Provides higher continuous drain current (86A) and superior power dissipation (480W) compared to the original part. The lower on-resistance (29mOhm) and extended operating temperature range (-55°C to 175°C) support high-performance applications. This part is appropriate for designs requiring enhanced thermal headroom or higher current capacity.
IXTA60N20T: Rated for 60A continuous drain current with 500W power dissipation. This part is suitable for applications where the original 75A rating exceeds system requirements, offering cost optimization while maintaining the 200V voltage rating and D2PAK package compatibility.
PSMN057-200B,118: Rated for 39A continuous drain current with 250W power dissipation. This part is appropriate for lower-current applications within the 200V voltage class. The higher on-resistance (57mOhm) and lower gate charge (96nC) characteristics differ from the original design and require circuit-level evaluation.

All substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can the STB75NF20 be used as a direct replacement for the STB75N20?

A: Yes. The STB75NF20 is a parametric equivalent with identical electrical specifications. Both parts share the same 200V Vdss rating, 75A continuous drain current, 34mOhm on-resistance, and 190W power dissipation. The STB75NF20 is in active product status, making it the recommended replacement for the obsolete STB75N20. No circuit modifications are required.

Q: What are the key differences between the IXTA86N20T and the original STB75N20?

A: The IXTA86N20T provides higher continuous drain current (86A versus 75A) and significantly higher power dissipation capability (480W versus 190W). The on-resistance is lower (29mOhm versus 34mOhm), and the operating temperature range is extended (-55°C to 175°C versus -50°C to 150°C). These characteristics make the IXTA86N20T suitable for applications requiring enhanced thermal performance or higher current capacity. The gate threshold voltage is higher (5V versus 4V), which may affect gate drive circuit design.

Q: Is the IXTA60N20T suitable for applications originally designed for the STB75N20?

A: The IXTA60N20T is suitable only if the application current requirements do not exceed 60A continuous drain current. The part maintains the 200V Vdss rating and D2PAK package compatibility. However, the on-resistance is higher (40mOhm versus 34mOhm), resulting in increased power dissipation at equivalent current levels. Circuit-level thermal analysis is required to confirm suitability for the specific application.

Q: Why does the PSMN057-200B,118 have higher on-resistance than the STB75N20?

A: The PSMN057-200B,118 is rated for lower continuous drain current (39A versus 75A). On-resistance characteristics are optimized for the device's current rating. The higher on-resistance (57mOhm versus 34mOhm) reflects this lower current class. This part is appropriate only for applications where the original 75A rating exceeds system requirements.

Q: Are all substitute parts available in D2PAK packaging?

A: Yes. All substitute parts listed are available in D2PAK or equivalent TO-263 variants. The STB75NF20, IXTA86N20T, IXTA60N20T, and PSMN057-200B,118 are all housed in D2PAK (TO-263-3) or TO-263AA packages, ensuring mechanical and thermal compatibility with the original STB75N20 footprint.

Q: Do all substitute parts meet the same compliance standards as the STB75N20?

A: Yes. All substitute parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), matching the original STB75N20 specifications. All parts are classified as REACH Unaffected and carry ECCN designation EAR99, ensuring regulatory compatibility across industrial and commercial applications.

Q: What is the difference between Cut Tape and Digi-Reel® packaging for the STB75NF20?

A: Both packaging options contain identical electrical components. Cut Tape packaging is suitable for manual assembly and small-volume production. Digi-Reel® packaging is optimized for automated pick-and-place assembly systems and high-volume manufacturing. The choice between packaging options depends on production methodology and assembly equipment capabilities, not electrical performance.

Q: Can gate drive circuits designed for the STB75N20 be used with the IXTA86N20T without modification?

A: Gate drive circuits must be evaluated for compatibility. The IXTA86N20T has a higher gate threshold voltage (5V versus 4V) and higher gate charge (90nC versus 84nC). While both parts accept ±20V to ±30V gate voltage, the higher threshold voltage may affect switching characteristics and gate drive timing. Circuit-level verification is required to confirm gate drive adequacy.

Q: What inventory status should be considered when selecting a substitute part?

A: Inventory availability is provided for reference but does not determine electrical suitability. The STB75NF20 (1373 pcs), IXTA86N20T (4677 pcs), IXTA60N20T (2620 pcs), and PSMN057-200B,118 (11197 pcs) are all in active production with substantial stock levels. Selection should be based on electrical compatibility with the application, with inventory status as a secondary consideration for supply chain planning.

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