STP75NF75FP N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The STP75NF75FP is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 75V drain-to-source voltage with 80A continuous drain current at 25°C. This device is part of the STripFET™ II series and is packaged in a Through Hole TO-220FP configuration. The product status is listed as Obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

STP75NF75FP

STMicroelectronicsIn Stock: 1925STP75NF75FP Datasheet

Current PartRFQ

AOTF2610L

Alpha & Omega Semiconductor Inc.In Stock: 1116AOTF2610L Datasheet

SimilarRFQ

TK40A06N1,S4X

Toshiba Semiconductor and StorageIn Stock: 9208TK40A06N1,S4X Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STP75NF75FP is determined by the following critical parameters:

Primary Substitution Criteria:

• FET Type: N-Channel MOSFET (Metal Oxide Semiconductor)
• Drain to Source Voltage (Vdss): Minimum 75V required for direct substitution
• Continuous Drain Current (Id): Minimum 80A at 25°C required for equivalent current handling
• On-State Resistance (Rds On): Maximum 11mOhm at specified conditions to maintain performance
• Gate Threshold Voltage (Vgs(th)): Within ±20V maximum gate voltage specification
• Operating Temperature: -55°C to 175°C (TJ) range
• Mounting Type: Through Hole configuration
• Package: TO-220-3 Full Pack format

Secondary Compatibility Parameters:

• Gate Charge (Qg): Affects switching speed and driver requirements
• Input Capacitance (Ciss): Influences gate drive circuit design
• Power Dissipation: Thermal management considerations
• RoHS and REACH Compliance: Regulatory alignment

The substitute parts listed below are identified as compatible alternatives based on shared electrical characteristics and mechanical compatibility within the allowed parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

STP75NF75FP Status: The STP75NF75FP is classified as Obsolete. This designation indicates that the part is no longer manufactured by STMicroelectronics and is no longer recommended for new designs. Existing inventory of 1,886 pieces is available, but long-term procurement cannot be assured.

Substitute Part Availability: Both substitute parts listed—AOTF2610L and TK40A06N1,S4X—carry Active product status, indicating ongoing manufacturing and availability from their respective manufacturers. Both parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements.

Electrical Compatibility Considerations: The AOTF2610L and TK40A06N1,S4X both operate at 60V Vdss, which is lower than the STP75NF75FP's 75V rating. This represents a voltage derating of 15V. Applications requiring the full 75V capability cannot use these substitutes. However, for applications operating below 60V, these parts provide functional equivalence.

The continuous drain current ratings of the substitute parts (35A for AOTF2610L and 40A for TK40A06N1,S4X) are lower than the STP75NF75FP's 80A rating. Applications requiring the full 80A capability must source alternative parts rated for this current level.

Mechanical and Thermal Compatibility: All three parts share the Through Hole mounting type and TO-220-3 Full Pack configuration, ensuring mechanical interchangeability in PCB layouts.

The TK40A06N1,S4X has a maximum operating temperature of 150°C (TJ), which is 25°C lower than the STP75NF75FP and AOTF2610L. Applications requiring operation at temperatures above 150°C cannot use the Toshiba device.

Regulatory Compliance: All parts are ROHS3 Compliant and carry EAR99 ECCN classification. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the AOTF2610L or TK40A06N1,S4X directly replace the STP75NF75FP in all applications?

A: No. Direct replacement is limited by voltage and current ratings. The substitute parts are rated for 60V Vdss and lower continuous drain currents (35A and 40A respectively) compared to the STP75NF75FP's 75V and 80A ratings. Substitution is valid only for applications operating within the lower voltage and current specifications of the substitute parts.

Q: What is the significance of the Vdss difference between the main part and substitutes?

A: Vdss (Drain to Source Voltage) is the maximum voltage the MOSFET can withstand between drain and source terminals. The STP75NF75FP is rated for 75V, while the substitutes are rated for 60V. Using a 60V-rated device in a 75V application risks device failure. Conversely, using a 75V-rated device in a 60V application is acceptable and provides additional safety margin.

Q: How do the gate charge differences affect circuit design?

A: Gate charge (Qg) determines the amount of charge required to switch the MOSFET on and off. The STP75NF75FP requires 160 nC at 10V, while the AOTF2610L requires 30 nC and the TK40A06N1,S4X requires 23 nC. Lower gate charge values result in faster switching speeds and reduced driver power requirements. Circuits designed for the STP75NF75FP's higher gate charge will operate correctly with the lower gate charge substitutes, but switching performance will improve.

Q: Are the substitute parts physically compatible with the STP75NF75FP?

A: Yes, regarding mounting. All three parts use Through Hole mounting and TO-220-3 Full Pack configuration, ensuring identical PCB footprints and mechanical fit. However, the AOTF2610L uses TO-220F packaging while the TK40A06N1,S4X uses TO-220SIS packaging. These are variants of the TO-220-3 standard and maintain mechanical compatibility.

Q: What is the impact of the lower Rds On values in the substitute parts?

A: On-state resistance (Rds On) determines conduction losses when the MOSFET is in the on state. The STP75NF75FP has 11 mOhm at 40A and 10V, while the substitutes have 10.7 mOhm (AOTF2610L) and 10.4 mOhm (TK40A06N1,S4X) at 20A and 10V. The lower Rds On values in the substitutes result in reduced power dissipation and heat generation during operation, which is beneficial for thermal management.

Q: Can I use these substitute parts in new designs?

A: Yes, provided the application requirements fall within the electrical specifications of the substitute parts. Both AOTF2610L and TK40A06N1,S4X carry Active product status, indicating they are currently manufactured and supported. Both are ROHS3 Compliant, meeting current regulatory requirements for new designs.

Q: What is the difference between the AOTF2610L and TK40A06N1,S4X?

A: Both are 60V-rated N-Channel MOSFETs in TO-220-3 packages. The TK40A06N1,S4X has a higher continuous drain current rating (40A vs. 35A) and lower gate charge (23 nC vs. 30 nC), resulting in faster switching. However, the TK40A06N1,S4X has a lower maximum operating temperature (150°C vs. 175°C). Selection between these two depends on whether higher current capacity or higher temperature operation is required.

Q: Why is the STP75NF75FP listed as Obsolete?

A: Obsolete status indicates that STMicroelectronics has discontinued manufacturing this part. While existing inventory is available (1,886 pieces), no new production is planned. For long-term component availability and design continuity, migration to Active parts such as the AOTF2610L or TK40A06N1,S4X is recommended for new designs or redesigns.