AUIRLL014N N-Channel MOSFET 55V 2A SOT-223 Equivalent & Substitute Parts

Part Overview

The AUIRLL014N is an N-Channel MOSFET manufactured by Infineon Technologies, designed for surface mount applications in the SOT-223 package. This device operates at 55V drain-to-source voltage with a continuous drain current rating of 2A at 25°C and dissipates up to 1W. The part is classified as obsolete, making identification of functionally equivalent substitutes essential for ongoing design support, production continuity, and component sourcing.

Substitute parts must maintain compatibility across electrical performance parameters, thermal characteristics, and mechanical packaging to ensure direct replacement capability without circuit redesign.

Substiute Parts

AUIRLL014N

Infineon TechnologiesIn Stock: 8276AUIRLL014N Datasheet

Current PartRFQ

NVF3055L108T1G

onsemiIn Stock: 3111NVF3055L108T1G Datasheet

MFR RecommendedRFQ

STN4NF06L

STMicroelectronicsIn Stock: 3335STN4NF06L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AUIRLL014N is determined by the following criteria:

Mandatory Compatibility Parameters:

• FET Type: N-Channel (required match)
• Package: SOT-223 / TO-261 form factor (required match for PCB compatibility)
• Drain to Source Voltage (Vdss): Must equal or exceed 55V
• Continuous Drain Current (Id): Must equal or exceed 2A at rated temperature
• Operating Temperature Range: Must encompass -55°C to 150°C minimum
• Gate Drive Voltage: Compatible with standard 5V or 10V gate drive circuits

Performance Considerations:

• Rds On (on-state resistance): Lower values indicate improved efficiency and reduced power dissipation
• Power Dissipation Rating: Must support thermal requirements of the application
• Gate Charge: Lower values reduce switching losses in high-frequency applications
• Input Capacitance: Affects gate drive requirements and switching speed

The identified substitute parts meet or exceed the electrical and mechanical requirements of the AUIRLL014N while offering enhanced performance characteristics or active product status for continued availability.

Parameter Comparison

Engineering Selection Recommendations

NVF3055L108T1G (onsemi):

This substitute provides a voltage rating increase to 60V with enhanced current capacity of 3A and improved power dissipation to 1.3W. The device maintains SOT-223 packaging and MSL-1 moisture sensitivity rating. NVF3055L108T1G holds active product status with AEC-Q101 automotive qualification and ROHS3 compliance, ensuring long-term availability and supply chain stability. The extended operating temperature range to 175°C provides additional thermal margin. This part is suitable for applications requiring higher current handling or thermal performance than the original AUIRLL014N.

STN4NF06L (STMicroelectronics):

This substitute delivers the highest current capacity at 4A with the lowest on-state resistance of 100mOhm at 1.5A/10V, resulting in superior efficiency and reduced power dissipation in high-frequency switching applications. The device maintains 60V voltage rating, SOT-223 packaging, and ±16V gate voltage compatibility matching the original part. STN4NF06L is part of the STripFET™ II series with active product status and ROHS3 compliance. The 3.3W power dissipation rating supports demanding thermal environments. This part is optimal for applications prioritizing switching efficiency and thermal performance.

Both substitutes satisfy the mandatory compatibility criteria of N-Channel topology, SOT-223 package form factor, voltage and current requirements, and operating temperature specifications. Selection between them depends on application-specific requirements for current capacity, thermal dissipation, and gate drive characteristics.

Frequently Asked Questions (FAQ)

Q: Can NVF3055L108T1G or STN4NF06L be used as direct replacements for AUIRLL014N without PCB modifications?

A: Yes. Both substitute parts are packaged in SOT-223 (TO-261-4, TO-261AA) with identical pin configurations and footprints. No PCB layout changes are required for mechanical compatibility. Electrical parameters are equal to or exceed the original part specifications.

Q: What is the primary reason for substituting the AUIRLL014N?

A: The AUIRLL014N is classified as obsolete. NVF3055L108T1G and STN4NF06L are active products with confirmed long-term availability, ensuring production continuity and supply chain reliability.

Q: How do the on-state resistance values affect circuit performance?

A: Lower Rds On values reduce conduction losses and heat generation. STN4NF06L (100mOhm) dissipates less power than AUIRLL014N (140mOhm) at equivalent current levels, improving overall circuit efficiency and reducing thermal management requirements.

Q: Are there gate drive voltage compatibility concerns?

A: Both substitutes accept ±15V to ±16V gate voltage, compatible with standard 5V and 10V gate drive circuits used with the original AUIRLL014N. No gate driver modifications are necessary.

Q: What is the significance of the higher input capacitance in the substitute parts?

A: NVF3055L108T1G (440pF) and STN4NF06L (340pF) exhibit higher input capacitance than AUIRLL014N (230pF). This increases gate charge requirements and may slightly increase switching losses in high-frequency applications. Gate driver current capability should be verified for frequencies exceeding 1MHz.

Q: Do the substitute parts meet automotive or industrial compliance standards?

A: NVF3055L108T1G carries AEC-Q101 automotive qualification. Both substitutes are ROHS3 compliant and REACH unaffected. These certifications support use in regulated industries and ensure environmental compliance.

Q: What is the thermal operating range difference?

A: AUIRLL014N and STN4NF06L operate to 150°C maximum junction temperature. NVF3055L108T1G extends to 175°C, providing additional thermal margin in high-temperature environments.

Q: How should I select between the two substitute options?

A: Choose NVF3055L108T1G for applications requiring extended temperature operation or automotive qualification. Choose STN4NF06L for applications prioritizing lowest on-state resistance, highest current capacity, and maximum switching efficiency.