STD90N4F3 Equivalent & Substitute Parts

Part Overview

The STD90N4F3 is an N-Channel 40V 80A MOSFET manufactured by STMicroelectronics in the STripFET™ III series, housed in a DPAK (TO-252-3) surface mount package. This device is rated for 110W power dissipation and operates across a temperature range of -55°C to 175°C. The part is currently classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with comparable performance characteristics within the same package family.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	80	A (Tc)
On-State Resistance (Rds On) @ 40A, 10V	6.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	54	nC
Input Capacitance (Ciss) @ 25V	2200	pF
Power Dissipation (Max)	110	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 DPAK	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the STD90N4F3 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): 40V minimum
Continuous Drain Current (Id): 80A or greater at Tc
On-State Resistance (Rds On): 6.5mOhm or lower @ 40A, 10V
Gate Threshold Voltage (Vgs(th)): 4V or lower @ 250µA
Gate Charge (Qg): 54nC or lower @ 10V
Input Capacitance (Ciss): 2200pF or lower @ 25V
Power Dissipation: 110W or greater at Tc
Operating Temperature: -55°C to 175°C minimum
Package: TO-252-3 DPAK surface mount
Compliance: ROHS3 compliant

Parametric Equivalent: Parts meeting all primary criteria with identical specifications across all electrical parameters.

Similar Substitutes: Parts meeting core voltage and package requirements with variations in current rating, on-state resistance, or power dissipation that remain functionally compatible within the specified operating envelope.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ Tc (A)	Rds On @ 10V (mOhm)	Vgs(th) @ 250µA (V)	Qg @ 10V (nC)	Ciss @ 25V (pF)	Power Diss. (W)	Temp Range (°C)	Status	Package
STD90N4F3	STMicroelectronics	40	80	6.5	4	54	2200	110	-55 to 175	Obsolete	TO-252-3 DPAK
STD95N4F3	STMicroelectronics	40	80	6.5	4	54	2200	110	-55 to 175	Active	TO-252-3 DPAK
IRLR3114ZTRPBF	Infineon Technologies	40	42	4.9	2.5	56	3810	140	-55 to 175	Active	TO-252-3 DPAK
DMTH4007LK3-13	Diodes Incorporated	40	70	7.3	3	29.1	1895	2.6	-55 to 175	Active	TO-252-3 DPAK
DMNH4006SK3Q-13	Diodes Incorporated	40	140	6	4	51	2280	2.2	-55 to 175	Active	TO-252-3 DPAK
FDD8453LZ	onsemi	40	50	6.7	3	64	3515	65	-55 to 150	Obsolete	TO-252-3 DPAK
AOD4184A	Alpha & Omega Semiconductor Inc.	40	50	7	2.6	33	1800	50	-55 to 175	Not For New Designs	TO-252-3 DPAK

Engineering Selection Recommendations

Parametric Equivalent (Recommended Primary Substitute):

The STD95N4F3 from STMicroelectronics is the parametric equivalent to the STD90N4F3. This part maintains identical electrical specifications across all measured parameters including Vdss, Id, Rds On, Vgs(th), Qg, Ciss, and power dissipation. The STD95N4F3 is currently in Active product status, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant and carry identical thermal and compliance certifications. The STD95N4F3 is available in Cut Tape and Digi-Reel® packaging options, providing flexibility for production environments.

Active Substitute Options:

The IRLR3114ZTRPBF (Infineon Technologies, HEXFET® series) provides superior performance characteristics with lower on-state resistance (4.9mOhm vs. 6.5mOhm) and higher power dissipation capability (140W vs. 110W). This part is rated for 42A continuous drain current, which is below the 80A specification of the STD90N4F3 but remains suitable for applications where the full 80A rating is not required. The IRLR3114ZTRPBF is in Active status with full compliance certifications.

The DMNH4006SK3Q-13 (Diodes Incorporated) offers the highest continuous drain current rating at 140A (Tc), exceeding the STD90N4F3 specification. This part maintains compatible Vdss (40V), Vgs(th) (4V), and operating temperature range (-55°C to 175°C). The DMNH4006SK3Q-13 carries AEC-Q101 automotive qualification and is in Active product status. On-state resistance is 6mOhm at 86A, 10V, which is superior to the STD90N4F3 specification.

Obsolete Alternatives (Not Recommended for New Designs):

The FDD8453LZ (onsemi, PowerTrench® series) is classified as Obsolete and carries a reduced operating temperature maximum of 150°C versus the 175°C specification of the STD90N4F3. This part is suitable only for legacy system maintenance where the STD90N4F3 cannot be sourced and thermal constraints permit the lower temperature rating.

The AOD4184A (Alpha & Omega Semiconductor Inc.) is classified as Not For New Designs. This part provides only 50A continuous drain current at Tc, significantly below the 80A requirement, and is not recommended for new applications.

Frequently Asked Questions (FAQ)

Q: Can the STD95N4F3 be used as a direct replacement for the STD90N4F3?

A: Yes. The STD95N4F3 is a parametric equivalent with identical electrical and thermal specifications. All measured parameters including Vdss, Id, Rds On, Vgs(th), Qg, Ciss, and power dissipation are identical. The STD95N4F3 is in Active product status, making it the recommended primary substitute for obsolete STD90N4F3 applications.

Q: What is the difference between a parametric equivalent and a similar substitute?

A: A parametric equivalent maintains identical specifications across all electrical parameters. A similar substitute meets the core voltage and package requirements but may have variations in current rating, on-state resistance, or power dissipation. Similar substitutes are functionally compatible but require verification that the application does not depend on the specific performance differences.

Q: Is the IRLR3114ZTRPBF suitable for applications requiring 80A continuous drain current?

A: No. The IRLR3114ZTRPBF is rated for 42A continuous drain current at Tc, which is below the 80A specification of the STD90N4F3. This part is suitable only for applications where the actual operating current does not exceed 42A. Applications requiring the full 80A rating must use the STD95N4F3 or DMNH4006SK3Q-13.

Q: Why is the FDD8453LZ not recommended despite being in the substitute list?

A: The FDD8453LZ is classified as Obsolete and has a maximum operating temperature of 150°C, compared to 175°C for the STD90N4F3. Additionally, it provides only 50A continuous drain current at Tc. This part should be used only for legacy system maintenance where the STD90N4F3 cannot be sourced and thermal operating conditions remain below 150°C.

Q: Are all substitute parts available in the same DPAK package?

A: Yes. All listed substitute parts are housed in the TO-252-3 DPAK (2 Leads + Tab) surface mount package, ensuring mechanical and thermal interface compatibility with existing PCB designs. Pin configuration and thermal pad dimensions are identical across all parts.

Q: What compliance certifications apply to the substitute parts?

A: All substitute parts listed are ROHS3 compliant and REACH unaffected. The DMNH4006SK3Q-13 carries additional AEC-Q101 automotive qualification. All parts are classified under ECCN EAR99 and HTSUS 8541.29.0095 for export control purposes.

Q: Can the DMNH4006SK3Q-13 be used in applications where the STD90N4F3 was originally specified?

A: Yes. The DMNH4006SK3Q-13 meets or exceeds all electrical specifications of the STD90N4F3. It provides 140A continuous drain current (vs. 80A), superior on-state resistance (6mOhm vs. 6.5mOhm), and maintains the same Vdss (40V), Vgs(th) (4V), and operating temperature range (-55°C to 175°C). The DMNH4006SK3Q-13 is in Active product status with automotive qualification.

Q: What is the moisture sensitivity level for these parts?

A: All listed parts carry MSL 1 (Unlimited) moisture sensitivity classification, indicating no moisture sensitivity restrictions for storage, handling, or reflow processes.

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