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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Infineon Technologies AUIRFL014N

Name: AUIRFL014N
Brand: Infineon Technologies
SKU: AUIRFL014N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRFL014N

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-261-4, TO-261AA

Datasheet:: AUIRFL014N.pdf

Description:: MOSFET N-CH 55V 1.5A SOT-223

Quantity:: RFQ Add To RFQ list

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Inventory:4,927

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Product details

Overview

AUIRFL014N from Infineon is an automotive-grade N-channel enhancement-mode HEXFET® Power MOSFET in SOT-223 package, rated for 55 V V_DS, 0.16 Ω R_DS(on) max at V_GS = 10 V and I_D = 1.9 A, with 150 °C maximum junction temperature and full avalanche rating - deployed in low-power engine control modules, body electronics load switching, and LED lighting drivers.

For engineers reviewing the AUIRFL014N datasheet, AUIRFL014N pinout, AUIRFL014N application, or AUIRFL014N equivalent, key selection criteria include its 1.9 A continuous drain current at 70 °C ambient, 7.0 nC typical gate charge, 150 °C thermal limit, and SOT-223 footprint compatibility with space-constrained automotive PCB layouts.

Technical Context

This device uses Infineon's advanced planar silicon process to achieve low on-resistance per die area while maintaining rugged unclamped inductive switching capability. Its dynamic dv/dt rating of 5.0 V/ns and 48 mJ single-pulse avalanche energy (V_DD = 25 V, T_J = 25 °C) support reliable operation in noisy automotive transients.

The MOSFET features a fully rated body diode with 1.7 A repetitive avalanche current and 41 ns reverse recovery time (T_J = 25 °C, I_F = 1.7 A), enabling efficient freewheeling in inductive loads such as solenoids and small motors without external diodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS Rating	55 V - supports 12 V automotive systems with margin against load dump transients up to ISO 7637-2 Pulse 5a.
R_DS(on) max	0.16 Ω @ V_GS = 10 V, I_D = 1.9 A - enables <1.2 W conduction loss at 1.9 A, suitable for thermally constrained PCB-mount designs.
I_D continuous	1.9 A @ T_A = 25 °C, 1.5 A @ T_A = 70 °C - defines usable current range on FR-4 boards with minimum footprint.
Q_g typ.	7.0 nC - determines gate drive power requirement and switching speed in 10–100 kHz PWM applications.
T_J max	+150 °C - allows operation in under-hood environments without derating below ambient 125 °C.
E_AS	48 mJ - ensures single-event robustness during inductive turn-off without snubber circuits.

Pinout & Package

Package: SOT-223 (TO-261AA), surface-mount, thermally enhanced with exposed drain pad. Mounting requires minimum recommended copper land pattern per Infineon standard footprint for optimal thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Drain)	Main current path output	Internally connected to exposed metal tab - must be soldered to large copper pour for thermal dissipation and EMI shielding.
Pin 2 (Gate)	Control input	High-impedance MOS gate requiring <7.0 nC charge for full enhancement; sensitive to ESD, needs series resistor for ringing suppression.
Pin 3 (Source)	Reference node / return path	Common source connection for load-switching topology; ties to ground plane and provides body diode cathode reference.
Pin 4 (Drain, Tab)	Primary thermal & electrical path	Electrically identical to Pin 1; mechanical mounting point for heat transfer - not isolated from drain potential.

Key Features

Feature	Design Value
Automotive qualification	Qualified per AEC-Q101 - validated for temperature cycling, humidity, and mechanical shock in engine bay and cabin environments.
Repetitive avalanche rating	Rated for unlimited repetitive avalanche events up to T_Jmax - eliminates need for overvoltage clamping in relay replacement circuits.
Dynamic dv/dt immunity	5.0 V/ns - prevents false turn-on during fast voltage transients common in 48 V mild-hybrid systems.
Lead-free & RoHS compliant	Meets EU Directive 2011/65/EU and JESD204B - compatible with lead-free reflow profiles and automotive supply chain traceability requirements.

Applications

Engine Control Unit (ECU) Solenoid Driver

Automotive Interior LED Lighting

Use Scenario: Driving fuel injector or idle air control valve solenoids in 12 V ECU subsystems with PWM duty cycles up to 90%.

IC Role / Device Role / Timing Role: Low-side switch controlling inductive load current; handles 1.7 A peak with 41 ns diode recovery to minimize cross-conduction loss.

Use Value: Eliminates external flyback diode due to fully rated body diode, reducing BOM count and board area by 30% vs. discrete diode solutions.

Use Scenario: Dimmable tail lamp or dome light driver operating from battery rail with thermal constraints inside plastic housing.

IC Role / Device Role / Timing Role: Constant-current switch in linear or PWM-controlled LED string configuration; leverages 150 °C T_Jmax for sustained 1.5 A operation at 85 °C ambient.

Use Value: Enables direct PCB-mount design without heatsink, achieving >92% efficiency at 1.3 A due to 0.16 Ω R_DS(on).

Body Control Module (BCM) Window Lift Motor

Start-Stop System Auxiliary Load Switch

Use Scenario: Bidirectional H-bridge half-bridge element for reversible DC motor control in power window actuators.

IC Role / Device Role / Timing Role: N-channel high-side or low-side switch; relies on 120 °C/W R_θJA (FR-4) and 48 mJ E_AS to survive motor stall and back-EMF spikes.

Use Value: Supports 15 A pulsed current (I_DM) for short-duration stall conditions without thermal shutdown or avalanche failure.

Use Scenario: Isolating auxiliary loads (e.g., HVAC blower, infotainment) during engine cranking to maintain stable 9 V bus voltage.

IC Role / Device Role / Timing Role: High-reliability load switch activated by microcontroller GPIO; uses ±20 V V_GS rating to tolerate gate drive noise during cranking transients.

Use Value: Guarantees uninterrupted operation across -40 °C to +125 °C ambient with no parameter drift beyond spec limits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel automotive MOSFET switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL10DN5LF3	R_DS(on) = 0.12 Ω @ 4.5 V, lower gate threshold (1.0–2.5 V), but only 40 V V_DS	Better suited for 5 V logic-driven low-voltage modules; insufficient for 12 V load dump margin.	Select when gate drive is 3.3/5 V MCU and system voltage never exceeds 24 V.
ON Semiconductor NTMFS4C09NT1G	55 V V_DS, 0.095 Ω R_DS(on), SO-8FL package - higher thermal resistance (R_θJA = 130 °C/W) than SOT-223	Higher power density but poorer PCB thermal coupling; requires larger copper area for same I_D.	Prefer for higher-current designs where SO-8FL layout fits and thermal vias can be added.

Compared with STL10DN5LF3 and NTMFS4C09NT1G, AUIRFL014N offers balanced trade-offs: sufficient 55 V margin for automotive transients, proven SOT-223 thermal performance on FR-4, and AEC-Q101 qualification without requiring gate-level translation or complex thermal management.

Availability

AUIRFL014N is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and automotive LED lighting systems requiring stable component supply and long-term lifecycle assurance.

Supply support for AUIRFL014N includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and qualification infrastructure.

AUIRFL014N belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for reliable low-power switching in harsh-temperature, high-transient automotive environments.

FAQ

Is AUIRFL014N suitable for hot-swap applications?

No - AUIRFL014N lacks integrated current limiting, thermal shutdown, or soft-start circuitry required for safe hot-swap insertion. It functions as a basic power switch and must be paired with external current-sense and control logic for inrush management.

What is the maximum PCB copper area needed for 1.9 A continuous operation?

Per Infineon's SOT-223 thermal guidelines, 1 inch² of 2 oz copper with 6 thermal vias (0.3 mm diameter) under the drain tab achieves ~60 °C/W R_θJA, enabling 1.9 A at 70 °C ambient. Minimum recommended footprint on FR-4 is 0.25 inch² with 2-layer construction.

Does AUIRFL014N require a gate resistor in standard 12 V automotive PWM circuits?

Yes - a 10–22 Ω series gate resistor is recommended to dampen ringing caused by PCB trace inductance and MOSFET input capacitance (C_iss = 190 pF), especially at switching frequencies above 20 kHz, preventing unintended turn-on from dv/dt coupling.

Can AUIRFL014N replace older IRFL014N in legacy designs?

Yes - AUIRFL014N is the automotive-qualified (AEC-Q101) version of IRFL014N with identical pinout, R_DS(on), and V_DS ratings, plus enhanced temperature range (-55 °C to +150 °C) and qualified reliability testing for automotive use cases.

AUIRFL014N Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 1.5A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 160mOhm @ 1.9A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 11 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 190 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 1W (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

AUIRFL014N FAQ

1.How can I place an order for AUIRFL014N through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRFL014N on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AUIRFL014N reliable?

The price and inventory of AUIRFL014N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRFL014N is usually 5 days.

3.What payment methods are accepted for AUIRFL014N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRFL014N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRFL014N?

AUIRFL014N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRFL014N order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AUIRFL014N?

For technical support, including AUIRFL014N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRFL014N requirements.

6.How does Aetrix verify that AUIRFL014N is sourced from the original manufacturer or authorized distributors?

All AUIRFL014N products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AUIRFL014N meets industry standards.

7.What is the process for return or replacement of AUIRFL014N?

All AUIRFL014N units undergo pre-shipment inspection (PSI). If there is an issue with AUIRFL014N, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AUIRFL014N part is unused and in its original packaging.

Return procedure for AUIRFL014N:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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