STF80N10F7 Equivalent & Substitute Parts

Part Overview

The STF80N10F7 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 100V drain-to-source voltage and 40A continuous drain current at 25°C. This device is packaged in a TO-220FP through-hole configuration and is part of the DeepGATE™ and STripFET™ VII series. The part is classified as obsolete, necessitating identification of equivalent alternatives for ongoing applications and new designs. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, thermal characteristics, and package form factors while meeting modern compliance requirements.

Substiute Parts

STF80N10F7

STMicroelectronicsIn Stock: 1524STF80N10F7 Datasheet

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AOTF288L

Alpha & Omega Semiconductor Inc.In Stock: 3260AOTF288L Datasheet

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IRFI4410ZPBF

Infineon TechnologiesIn Stock: 15397IRFI4410ZPBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STF80N10F7 is determined by the following critical parameters:

Voltage Rating Compatibility: Substitute parts must have a Vdss rating equal to or greater than 100V to ensure safe operation in circuits designed for this voltage class.

Current Handling Capacity: Substitute parts must support continuous drain current (Id) at 25°C equal to or exceeding 40A (Tc) to maintain thermal and electrical performance equivalence.

On-State Resistance (Rds On): Substitute parts must have Rds On values at or below 10 mOhm when measured at comparable gate-source voltage (10V) and drain current conditions to ensure minimal power loss and thermal generation.

Gate Charge (Qg): Substitute parts should have gate charge values comparable to or lower than 45 nC at 10V to maintain switching speed and driver compatibility.

Power Dissipation: Substitute parts must support thermal dissipation of 30W or greater at the case temperature (Tc) to handle equivalent power loads.

Package and Mounting: Substitute parts must use TO-220 series through-hole packaging to ensure mechanical and thermal interface compatibility with existing PCB designs.

Compliance and Status: Substitute parts must maintain ROHS3 compliance and preferably be in active production status to ensure long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

IRFI4410ZPBF (Infineon Technologies): This part meets the primary electrical requirements with matching 100V Vdss rating and exceeds the 40A continuous current specification at 43A (Tc). The Rds On value of 9.3 mOhm is superior to the original specification, and power dissipation capability of 47W exceeds the 30W requirement. However, the gate charge of 110 nC is significantly higher than the original 45 nC, which may impact switching speed and driver requirements. The part is classified as "Not For New Designs," indicating limited future availability. ROHS3 compliance and TO-220AB Full-Pak packaging provide mechanical compatibility with standard TO-220 footprints.

AOTF288L (Alpha & Omega Semiconductor Inc.): This part is currently in active production status, ensuring long-term supply chain stability. The 80V Vdss rating is 20V lower than the original specification, making this part suitable only for applications where the circuit voltage does not exceed 80V. The continuous drain current of 43A (Tc) exceeds the 40A requirement. The Rds On value of 9.2 mOhm is superior, and gate charge of 38 nC is lower than the original, supporting faster switching characteristics. Power dissipation of 35.5W (Tc) exceeds the 30W requirement. ROHS3 compliance and TO-220F packaging provide mechanical compatibility. This part is appropriate for 80V-rated circuit applications only.

For applications requiring full 100V voltage rating compatibility, IRFI4410ZPBF is the primary electrical equivalent. For applications operating at 80V or below, AOTF288L provides an active-status alternative with superior switching characteristics.

Frequently Asked Questions (FAQ)

Q: Can AOTF288L be used as a direct replacement for STF80N10F7 in all applications?

A: No. AOTF288L has an 80V Vdss rating compared to the STF80N10F7's 100V rating. It is suitable only for circuits designed to operate at 80V or below. Applications requiring the full 100V voltage margin must use IRFI4410ZPBF or equivalent 100V-rated devices.

Q: What is the significance of the higher gate charge (110 nC) in IRFI4410ZPBF compared to the original 45 nC?

A: Gate charge directly affects switching speed and driver power requirements. The higher gate charge in IRFI4410ZPBF requires more charge delivery from the gate driver circuit, potentially increasing switching losses and driver current demands. Circuit designers must verify that existing gate driver circuits can supply the required charge at the intended switching frequency.

Q: Are all three parts mechanically compatible with existing TO-220 PCB footprints?

A: Yes. All three parts use TO-220 series through-hole packaging (TO-220FP, TO-220AB Full-Pak, and TO-220F). Standard TO-220 PCB footprints accommodate all variants. However, thermal interface characteristics may differ slightly between full-pack and standard variants; thermal design verification is necessary for high-power applications.

Q: Why is IRFI4410ZPBF marked "Not For New Designs" if it meets the electrical requirements?

A: "Not For New Designs" status indicates that the manufacturer is phasing out this part and does not recommend its use in new product development. While existing inventory may be available, long-term supply cannot be guaranteed. For new designs, AOTF288L (active status) is preferred where voltage rating permits, or alternative 100V-rated active parts should be evaluated.

Q: What compliance certifications are maintained across all substitute parts?

A: All three parts maintain ROHS3 compliance and REACH Unaffected status, ensuring environmental and regulatory compatibility. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Q: How do the on-state resistance values compare, and what is the practical impact?

A: STF80N10F7: 10 mOhm @ 40A, 10V; IRFI4410ZPBF: 9.3 mOhm @ 26A, 10V; AOTF288L: 9.2 mOhm @ 20A, 10V. Lower Rds On values reduce conduction losses and heat generation. Both substitutes offer lower Rds On specifications, resulting in improved efficiency. However, Rds On values are measured at different current levels; direct comparison requires normalization to identical test conditions.

Q: Can these parts be used interchangeably in switching power supply applications?

A: Interchangeability depends on the specific circuit voltage rating and switching frequency. For 100V-rated supplies, only IRFI4410ZPBF is suitable. For 80V-rated supplies, AOTF288L is acceptable. Switching frequency compatibility must be verified based on gate charge and driver capabilities. Thermal design must account for differences in power dissipation and package thermal resistance.