STB200NF04L N-Channel 40V 120A MOSFET Equivalent & Substitute Parts

Part Overview

The STB200NF04L is an N-Channel MOSFET manufactured by STMicroelectronics in the STripFET™ II series. This device operates at 40V drain-to-source voltage with a continuous drain current of 120A at 25°C (Tc) and dissipates up to 300W. The component is packaged in a surface-mount D2PAK (TO-263-3) configuration with RoHS3 compliance and unlimited moisture sensitivity rating.

The STB200NF04L is classified as Obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this MOSFET specification.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	120	A (Tc)
On-State Resistance (Rds On) @ 50A, 10V	3.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 4.5V	90	nC
Power Dissipation (Max)	300	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the STB200NF04L is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain-to-Source Voltage (Vdss) must equal or exceed 40V
Continuous Drain Current (Id) must meet or exceed 120A at 25°C (Tc)
On-State Resistance (Rds On) must not significantly exceed 3.5mOhm to maintain thermal performance
Gate Threshold Voltage (Vgs(th)) must be compatible with 4V drive specification
Power Dissipation capability must support 300W (Tc) thermal requirements

Mechanical and Package Compatibility:

Mounting type must be Surface Mount
Package must be D2PAK (TO-263-3) or equivalent footprint
Pin configuration must match TO-263-3 standard (2 Leads + Tab)

Compliance and Environmental:

RoHS3 compliance required
Moisture Sensitivity Level (MSL) of 1 (Unlimited) preferred
Operating temperature range must span -55°C to 175°C (TJ)

Substitute parts are grouped into three categories based on current rating alignment: Direct Equivalents (120A rated), Higher Current Alternatives (160A–180A rated), and Lower Current Alternatives (75A–105A rated). Selection depends on application thermal headroom and current margin requirements.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Vgs(th) (V)	Qg (nC)	Power Dissipation (W)	Package	Status
STB200NF04L	STMicroelectronics	40	120 (Tc)	3.5 @ 50A, 10V	4 @ 250µA	90 @ 4.5V	300 (Tc)	D2PAK (TO-263-3)	Obsolete
BUK661R9-40C,118	Nexperia USA Inc.	40	120 (Tc)	1.9 @ 25A, 10V	2.8 @ 1mA	260 @ 10V	306 (Tc)	D2PAK (TO-263-3)	Obsolete
BUK964R4-40B,118	Nexperia USA Inc.	40	75 (Tc)	4 @ 25A, 10V	2 @ 1mA	64 @ 5V	254 (Tc)	D2PAK (TO-263-3)	Active
IRF1404STRLPBF	Infineon Technologies	40	162 (Tc)	4 @ 95A, 10V	4 @ 250µA	200 @ 10V	200 (Tc)	D2PAK (TO-263-3)	Active
IRF1404ZSTRLPBF	Infineon Technologies	40	180 (Tc)	3.7 @ 75A, 10V	4 @ 150µA	150 @ 10V	200 (Tc)	D2PAK (TO-263-3)	Active
IRF2204SPBF	Infineon Technologies	40	170 (Tc)	3.6 @ 130A, 10V	4 @ 250µA	200 @ 10V	200 (Tc)	D2PAK (TO-263-3)	Obsolete
IRF2804STRL7PP	Infineon Technologies	40	160 (Tc)	1.6 @ 160A, 10V	4 @ 250µA	260 @ 10V	330 (Tc)	D2PAK (7-Lead, TO-263-7)	Active
IRF2804STRLPBF	Infineon Technologies	40	75 (Tc)	2 @ 75A, 10V	4 @ 250µA	240 @ 10V	300 (Tc)	D2PAK (TO-263-3)	Active
IRL1404STRLPBF	Infineon Technologies	40	160 (Tc)	4 @ 95A, 10V	3 @ 250µA	140 @ 5V	200 (Tc)	D2PAK (TO-263-3)	Not For New Designs
IRL1404ZSTRLPBF	Infineon Technologies	40	75 (Tc)	3.1 @ 75A, 10V	2.7 @ 250µA	110 @ 5V	230 (Tc)	D2PAK (TO-263-3)	Active
AOB240L	Alpha & Omega Semiconductor Inc.	40	105 (Tc)	2.6 @ 20A, 10V	2.2 @ 250µA	72 @ 10V	176 (Tc)	D2PAK (TO-263-3)	Not For New Designs

Engineering Selection Recommendations

Direct Current Rating Equivalents (120A):

The BUK661R9-40C,118 from Nexperia USA Inc. provides the closest electrical match to the STB200NF04L with identical 40V/120A specifications. This part features superior on-state resistance (1.9mOhm versus 3.5mOhm) and slightly higher power dissipation capability (306W versus 300W). The BUK661R9-40C,118 carries AEC-Q101 automotive qualification and is classified as Obsolete, matching the lifecycle status of the original part. Both devices operate across the full -55°C to 175°C temperature range and maintain RoHS3 compliance.

Higher Current Alternatives (160A–180A):

The IRF1404ZSTRLPBF and IRF1404STRLPBF from Infineon Technologies offer increased current capacity (180A and 162A respectively) while maintaining 40V voltage rating and D2PAK packaging. These Active-status parts provide thermal margin for applications requiring sustained high-current operation. The IRF1404ZSTRLPBF delivers 3.7mOhm on-state resistance at 75A, 10V, and 200W power dissipation. The IRF2804STRL7PP provides the lowest on-state resistance (1.6mOhm at 160A, 10V) with 330W power dissipation but uses a 7-lead D2PAK variant (TO-263-7), requiring footprint verification before selection.

Lower Current Alternatives (75A–105A):

The IRF2804STRLPBF and IRL1404ZSTRLPBF from Infineon Technologies, along with the AOB240L from Alpha & Omega Semiconductor Inc., operate at 75A–105A continuous drain current. These parts are suitable for applications where the full 120A capacity of the STB200NF04L is not required. The IRF2804STRLPBF maintains 300W power dissipation matching the original part and is Active-status. The AOB240L provides 176W power dissipation and is classified as Not For New Designs.

Compliance and Lifecycle Considerations:

All listed substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Selection between Active, Obsolete, and Not For New Designs status depends on application lifecycle requirements. For new designs, prioritize Active-status parts: IRF1404ZSTRLPBF, IRF2804STRL7PP, IRF2804STRLPBF, and IRL1404ZSTRLPBF. For legacy system support, the BUK661R9-40C,118 provides direct electrical equivalence with automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can the BUK964R4-40B,118 replace the STB200NF04L directly?

A: The BUK964R4-40B,118 operates at 75A continuous drain current, which is 62.5% of the STB200NF04L's 120A rating. This part is suitable only for applications where the actual current requirement does not exceed 75A. The 40V voltage rating and D2PAK package are compatible, but thermal and current margin must be verified against application specifications.

Q: What is the difference between IRF1404STRLPBF and IRF1404ZSTRLPBF?

A: Both parts are from Infineon's HEXFET® series with 40V rating and D2PAK packaging. The IRF1404ZSTRLPBF provides higher continuous drain current (180A versus 162A) and lower on-state resistance (3.7mOhm versus 4mOhm at specified test conditions). The IRF1404ZSTRLPBF is Active-status, while the IRF1404STRLPBF is also Active. Selection depends on whether the additional 18A current capacity and improved resistance characteristics are required for the application.

Q: Is the IRF2804STRL7PP footprint compatible with the STB200NF04L?

A: The IRF2804STRL7PP uses a 7-lead D2PAK variant (TO-263-7, TO-263CB) compared to the STB200NF04L's standard 3-lead D2PAK (TO-263-3, TO-263AB). The additional leads provide enhanced thermal and electrical performance but require a different PCB footprint. Mechanical compatibility cannot be assumed; the target PCB layout must support the 7-lead configuration before selection.

Q: Which substitute part has the lowest on-state resistance?

A: The IRF2804STRL7PP features the lowest on-state resistance at 1.6mOhm when measured at 160A, 10V. This superior performance reduces conduction losses and heat generation. However, the 7-lead D2PAK package requires footprint verification. Among standard 3-lead D2PAK parts, the BUK661R9-40C,118 provides 1.9mOhm at 25A, 10V.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification. All parts also maintain unlimited moisture sensitivity rating (MSL 1), matching the environmental specifications of the STB200NF04L.

Q: What is the significance of "Active" versus "Obsolete" product status?

A: Active-status parts are in current production and supported by manufacturers for new designs. Obsolete-status parts are no longer manufactured but may remain available through inventory channels. For new product development, Active-status substitutes (IRF1404ZSTRLPBF, IRF2804STRL7PP, IRF2804STRLPBF, IRL1404ZSTRLPBF) are preferred. For legacy system maintenance, Obsolete-status parts may be necessary to match original specifications.

Q: Can gate charge differences affect circuit performance?

A: Yes. Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The STB200NF04L specifies 90nC at 4.5V. Substitute parts range from 64nC to 260nC depending on the device. Higher gate charge increases switching losses and may require gate driver adjustments. Lower gate charge reduces switching losses but may affect gate drive circuit stability. Gate driver compatibility must be verified when substituting parts with significantly different Qg values.

Q: What thermal considerations apply when selecting a substitute?

A: Power dissipation capability varies among substitutes from 176W (AOB240L) to 330W (IRF2804STRL7PP). The STB200NF04L dissipates 300W at Tc. Substitutes with lower power dissipation ratings require more aggressive thermal management (larger heatsinks, improved airflow). Substitutes with higher ratings provide thermal margin. On-state resistance (Rds On) directly affects conduction losses; lower resistance reduces heat generation. Application thermal design must accommodate the selected substitute's power dissipation characteristics.

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