STF60N55F3 Equivalent & Substitute Parts

Part Overview

The STF60N55F3 is an N-Channel MOSFET manufactured by STMicroelectronics, part of the STripFET™ III series. This device is rated for 55V drain-to-source voltage with a continuous drain current of 42A at 25°C and maximum power dissipation of 30W. The component features a through-hole TO-220FP package configuration.

The STF60N55F3 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this device is specified.

Substiute Parts

STF60N55F3

STMicroelectronicsIn Stock: 2854STF60N55F3 Datasheet

Current PartRFQ

IRFI3205PBF

Infineon TechnologiesIn Stock: 2715IRFI3205PBF Datasheet

DirectRFQ

AOTF2610L

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STF60N55F3 is determined by the following critical parameters:

Primary Substitution Criteria:

• FET Type: N-Channel configuration
• Drain to Source Voltage (Vdss): Minimum 55V rating
• Continuous Drain Current (Id): Minimum 42A at 25°C
• Package Type: Through-hole TO-220 family
• Operating Temperature Range: -55°C to 175°C
• RoHS3 Compliance and REACH Unaffected status

Direct Equivalent Classification: Parts meeting all primary criteria with equivalent or superior electrical performance and identical package compatibility are classified as direct equivalents.

Similar Part Classification: Parts meeting primary criteria but with variations in specific parameters (such as voltage rating, current rating, or gate charge characteristics) are classified as similar alternatives. These parts function within the same application space but may require circuit validation for specific use cases.

Parameter Comparison

Engineering Selection Recommendations

IRFI3205PBF (Direct Equivalent - Infineon Technologies)

The IRFI3205PBF is classified as a direct equivalent to the STF60N55F3. Both devices share identical drain-to-source voltage ratings (55V) and equivalent gate threshold voltage specifications (4V @ 250µA). The IRFI3205PBF provides superior continuous drain current capability (64A versus 42A) and higher power dissipation rating (63W versus 30W), making it suitable for applications requiring the STF60N55F3 performance envelope. The device maintains full RoHS3 compliance and REACH unaffected status. The IRFI3205PBF is currently in active production status, ensuring long-term availability. Pin-to-pin compatibility exists within the TO-220 family, though package variant differences (TO-220AB Full-Pak versus TO-220FP) require verification of PCB footprint compatibility.

AOTF2610L (Similar Alternative - Alpha & Omega Semiconductor Inc.)

The AOTF2610L is classified as a similar alternative to the STF60N55F3. This device operates at a higher drain-to-source voltage rating (60V versus 55V) and provides continuous drain current of 35A at 25°C (Tc), which is below the 42A specification of the main part. The AOTF2610L features a lower gate threshold voltage (2.5V versus 4V) and reduced gate charge (30nC versus 45nC), resulting in faster switching characteristics. Power dissipation capability is rated at 31W (Tc), comparable to the main part. The device maintains full RoHS3 compliance and REACH unaffected status and is in active production. Selection of this part requires confirmation that the reduced continuous drain current rating is acceptable for the intended application circuit.

Frequently Asked Questions (FAQ)

Q: Can the IRFI3205PBF directly replace the STF60N55F3 without circuit modifications?

A: The IRFI3205PBF meets all primary electrical substitution criteria: identical 55V Vdss rating, equivalent gate threshold voltage (4V @ 250µA), and superior current and power ratings. Both devices are N-Channel MOSFETs with identical operating temperature ranges and compliance certifications. However, package variant differences (TO-220AB Full-Pak versus TO-220FP) require PCB footprint verification. Pin configuration within the TO-220 family is standard, but physical package dimensions may differ slightly. Electrical circuit operation is compatible without modification.

Q: Why is the AOTF2610L classified as a similar alternative rather than a direct equivalent?

A: The AOTF2610L differs from the STF60N55F3 in three key parameters: (1) Drain-to-source voltage is rated at 60V instead of 55V, (2) Continuous drain current is 35A (Tc) instead of 42A, and (3) Gate threshold voltage is 2.5V instead of 4V. While these differences do not prevent functional operation in many applications, the reduced current rating falls below the main part specification. The higher voltage rating provides additional margin but does not compensate for the current limitation. Applications requiring the full 42A continuous current capability must use the IRFI3205PBF or equivalent higher-current devices.

Q: Are all three parts (STF60N55F3, IRFI3205PBF, AOTF2610L) pin-compatible?

A: All three devices use TO-220 family through-hole packages with standard N-Channel MOSFET pin configurations (Gate, Drain, Source). Pin assignment is identical across all three parts. However, package variants (TO-220FP, TO-220AB Full-Pak, TO-220F) may have minor dimensional differences. PCB footprint compatibility must be verified for each specific package variant before assembly. Standard TO-220 footprints accommodate all three variants, but thermal pad configurations may differ.

Q: What is the significance of the gate charge difference between these parts?

A: Gate charge (Qg) directly affects switching speed and gate drive circuit requirements. The STF60N55F3 has a gate charge of 45nC @ 10V, while the IRFI3205PBF has 170nC @ 10V, and the AOTF2610L has 30nC @ 10V. Higher gate charge requires more energy from the gate driver circuit and results in slower switching transitions. The IRFI3205PBF's higher gate charge may require gate driver circuit validation in high-frequency switching applications. The AOTF2610L's lower gate charge enables faster switching but requires confirmation that the reduced current rating is acceptable.

Q: Are there any compliance or regulatory differences between these parts?

A: All three parts maintain RoHS3 compliance and REACH unaffected status. No regulatory or compliance differences exist. All parts are suitable for applications requiring RoHS3 and REACH compliance. Moisture sensitivity level (MSL) is rated as 1 (Unlimited) for all three devices, indicating no special moisture handling requirements during storage or assembly.

Q: What is the impact of the STF60N55F3 being classified as obsolete?

A: Obsolete status indicates that STMicroelectronics has discontinued production and will not manufacture additional units. Existing inventory may be available from authorized distributors, but long-term supply cannot be guaranteed. The IRFI3205PBF and AOTF2610L are both in active production status, ensuring continued availability for new designs and production runs. For new product development or long-term production commitments, selection of an active-status substitute part is recommended.