STF10P6F6 Equivalent & Substitute Parts

Part Overview

The STF10P6F6 is a P-Channel MOSFET manufactured by STMicroelectronics, rated for 60V drain-to-source voltage and 10A continuous drain current in a Through Hole TO-220FP package. This device is part of the DeepGATE™ and STripFET™ VI series and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Substiute Parts

STF10P6F6

STMicroelectronicsIn Stock: 1157STF10P6F6 Datasheet

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IRF9540NPBF

Infineon TechnologiesIn Stock: 65274IRF9540NPBF Datasheet

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IRFI9Z34GPBF

Vishay SiliconixIn Stock: 6759IRFI9Z34GPBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STF10P6F6 is determined by strict alignment of electrical and mechanical parameters within the P-Channel MOSFET category. The critical substitution criteria are:

Electrical Parameters:

• FET Type: P-Channel (required match)
• Drain to Source Voltage (Vdss): Minimum 60V (equal or higher acceptable)
• Continuous Drain Current (Id): Minimum 10A (equal or higher acceptable)
• Gate Threshold Voltage (Vgs(th)): 4V maximum (matching specification)
• Maximum Gate Voltage (Vgs): ±20V (matching specification)

Mechanical Parameters:

• Mounting Type: Through Hole (required match)
• Package / Case: TO-220-3 or compatible TO-220 variant (required match)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (required match)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (required match)

The substitute parts listed below meet or exceed these criteria and are sourced from active manufacturers with current product status.

Parameter Comparison

Engineering Selection Recommendations

IRF9540NPBF (Infineon Technologies)

The IRF9540NPBF is an active-status substitute with electrical ratings that exceed the STF10P6F6 specification. It provides 100V Vdss (versus 60V), 23A continuous drain current (versus 10A), and 140W power dissipation (versus 20W). The device maintains identical gate threshold voltage (4V @ 250µA) and maximum gate voltage (±20V) specifications. The IRF9540NPBF is packaged in TO-220AB, a standard TO-220 variant compatible with TO-220-3 footprints. RoHS3 compliance and MSL 1 rating match the original part. This substitute is suitable for applications requiring higher voltage or current headroom within the same form factor.

IRFI9Z34GPBF (Vishay Siliconix)

The IRFI9Z34GPBF is an active-status substitute with electrical ratings closely aligned to the STF10P6F6. It provides 60V Vdss (matching specification), 12A continuous drain current (exceeding 10A requirement), and 42W power dissipation (exceeding 20W requirement). Gate threshold voltage (4V @ 250µA) and maximum gate voltage (±20V) are identical. The device is packaged in TO-220-3 Full Pack with isolated tab, providing direct mechanical compatibility. Operating temperature range extends to 175°C (versus 150°C). RoHS3 compliance and MSL 1 rating match the original part. This substitute provides the closest electrical and mechanical alignment to the STF10P6F6.

Both substitutes are sourced from active manufacturers with current product status and full compliance certifications, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the IRF9540NPBF be used as a direct replacement for the STF10P6F6?

A: The IRF9540NPBF is electrically compatible as a substitute. It exceeds the voltage and current ratings of the STF10P6F6 and maintains identical gate threshold and maximum gate voltage specifications. The TO-220AB package is mechanically compatible with TO-220-3 footprints. However, the higher power dissipation rating (140W versus 20W) may require thermal design review in applications operating near the original part's power limits.

Q: What is the primary difference between the IRF9540NPBF and IRFI9Z34GPBF?

A: The IRF9540NPBF provides higher voltage rating (100V versus 60V) and significantly higher current capacity (23A versus 12A), making it suitable for applications requiring greater electrical headroom. The IRFI9Z34GPBF maintains the same 60V voltage rating as the STF10P6F6 with modest current and power dissipation improvements, offering closer electrical alignment to the original specification.

Q: Are there package compatibility concerns when substituting these parts?

A: All three parts use Through Hole mounting in TO-220 package variants (TO-220FP, TO-220AB, and TO-220-3). These packages share the same pin configuration and footprint spacing, ensuring direct mechanical compatibility on standard PCB layouts. The IRFI9Z34GPBF includes an isolated tab feature, which may provide additional thermal performance in certain applications.

Q: Do the substitute parts meet the same compliance requirements as the STF10P6F6?

A: Yes. Both IRF9540NPBF and IRFI9Z34GPBF are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original part's compliance profile. Both are REACH unaffected and classified under ECCN EAR99, maintaining regulatory consistency.

Q: Which substitute should be selected for a direct replacement in existing designs?

A: The IRFI9Z34GPBF provides the closest electrical specification match (60V Vdss, 12A Id) and is recommended for direct replacement in existing designs without thermal or electrical redesign. The IRF9540NPBF is suitable when higher voltage or current capability is beneficial or when supply availability of the IRFI9Z34GPBF is constrained.

Q: What is the operating temperature range difference between substitutes?

A: The STF10P6F6 operates to 150°C (TJ). The IRF9540NPBF operates from -55°C to 150°C, and the IRFI9Z34GPBF operates from -55°C to 175°C. Both substitutes provide extended low-temperature operation and the IRFI9Z34GPBF provides extended high-temperature operation, offering improved thermal margin in demanding applications.