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

Infineon Technologies AUIRLR3105

Name: AUIRLR3105
Brand: Infineon Technologies
SKU: AUIRLR3105
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRLR3105

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: AUIRLR3105.pdf

Description:: MOSFET N-CH 55V 25A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AUIRLR3105 from Infineon is an automotive-grade N-channel HEXFET® Power MOSFET in D-Pak package, rated for 55 V V_DS, 25 A continuous drain current at T_C = 25°C, and 30 mΩ typical R_DS(on) at V_GS = 10 V. It features logic-level gate drive (V_GS(th) max 3.0 V), 175°C junction operation, and full repetitive avalanche rating-designed for high-reliability DC-DC converters and motor control in engine management systems.

For engineers reviewing the AUIRLR3105 datasheet, AUIRLR3105 pinout, AUIRLR3105 application, or AUIRLR3105 equivalent, key selection criteria include its 30 mΩ on-resistance at 5 V gate drive, 94 mJ tested single-pulse avalanche energy, 52 ns reverse recovery time of the integrated body diode, and compliance with AEC-Q101 automotive qualification standards.

Technical Context

This MOSFET employs Infineon's Stripe Planar HEXFET® technology to achieve low R_DS(on) per die area while maintaining ruggedness against voltage transients and thermal stress. Its dynamic dv/dt rating of 3.4 V/ns and fully rated avalanche capability support robust operation in inductive switching circuits such as fuel injector drivers and solenoid controls.

The device integrates a fast, low-V_SD body diode (1.3 V at 15 A, 25°C) with 82 nC reverse recovery charge and 52 ns trr-enabling efficient synchronous rectification and freewheeling in automotive power stages without external diode supplementation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V - Withstands battery load-dump transients up to ISO 7637-2 Pulse 5a in 12 V automotive systems.
R_DS(on) typ.	30 mΩ @ V_GS = 10 V - Enables <1.5 W conduction loss at 25 A, reducing heatsink requirements in space-constrained ECUs.
I_D cont.	25 A @ T_C = 25°C - Supports high-current loads like radiator fans and HVAC blowers without derating at ambient temperatures ≤85°C.
E_AS tested	94 mJ - Confirmed single-pulse avalanche energy allows safe operation during unclamped inductive turn-off in relay/snubberless designs.
Q_g	20 nC - Low gate charge enables fast switching with standard gate drivers, achieving <100 ns total propagation delay in 48 V auxiliary supplies.
T_J max	+175°C - Rated for under-hood applications including transmission control modules where ambient exceeds 125°C.
V_GS(th)	1.0–3.0 V - Logic-level compatible with 3.3 V and 5 V microcontrollers, eliminating need for level-shifting gate drivers.

Pinout & Package

Package: D-Pak (TO-252AA), surface-mount, single-sided heat dissipation via exposed drain pad. Thermal resistance R_θJC = 2.65°C/W enables direct PCB copper pour cooling.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires ≤±16 V bias; 20 nC total charge demands low-impedance drive for <37 ns fall time.
D	Drain	Main high-side power path; electrically connected to exposed metal tab-must be isolated from heatsink unless referenced to system ground.
S	Source	Return path for load current; internal source inductance (L_S = 7.5 nH) impacts high-di/dt ringing in motor phase legs.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q101 qualified-tested for temperature cycling, humidity, and mechanical shock per automotive reliability standards.
Logic-level gate drive	V_GS(th) ≤ 3.0 V enables direct interface with 3.3 V/5 V MCU GPIOs without gate driver ICs in low-power control nodes.
Repetitive avalanche rating	Rated for unlimited repetitive avalanche events up to T_Jmax = 175°C-supports snubberless inductive switching in starter relays.
Fast body diode	trr = 52 ns, Q_rr = 82 nC-reduces switching losses and EMI in half-bridge freewheeling paths for EPS and ADAS actuators.
Lead-free & RoHS	Halogen-free, Pb-free termination-complies with ELV Directive and IPC-J-STD-020 reflow profile for lead-free assembly.

Applications

Engine Control Unit (ECU)

Fuel Injector Driver

Use Scenario: High-speed switching of 12 V solenoid injectors in gasoline direct injection systems.

IC Role / Device Role / Timing Role: Main power switch controlling injector coil energization/de-energization with precise pulse-width modulation.

Use Value: 30 mΩ R_DS(on) minimizes resistive heating during 10 ms pulses; 94 mJ avalanche rating absorbs coil flyback without external clamp diodes.

Use Scenario: Driving peak currents >15 A into low-inductance fuel injector coils with tight timing accuracy.

IC Role / Device Role / Timing Role: High-side switch delivering controlled current pulses synchronized to crankshaft position sensor signals.

Use Value: 52 ns body diode trr ensures clean turn-off transition; 3.4 V/ns dv/dt rating prevents false triggering during rapid V_DS transitions.

Electric Power Steering (EPS)

Transmission Control Module (TCM)

Use Scenario: Bidirectional motor phase switching in 48 V EPS assist systems operating at ambient up to 125°C.

IC Role / Device Role / Timing Role: Half-bridge low-side switch enabling PWM-controlled torque assist with regenerative braking capability.

Use Value: 175°C T_J rating sustains operation during prolonged assist cycles; 25 A continuous rating supports peak assist currents without derating.

Use Scenario: Controlling hydraulic solenoids and clutch actuators in automatic transmissions under severe thermal cycling.

IC Role / Device Role / Timing Role: Robust power switch handling 200 ms pulses at 20 A with repeated thermal stress from gear shifts.

Use Value: Repetitive avalanche capability eliminates need for external TVS clamps; R_θJC = 2.65°C/W enables compact thermal design on multilayer PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL120N5LF6AG	R_DS(on) = 3.5 mΩ @ 10 V (lower), but 40 V V_DS rating and non-automotive qualification.	Not AEC-Q101 qualified; unsuitable for safety-critical engine bay locations.	Select only for non-automotive 12 V industrial motor drives where higher voltage margin is not required.
IRLR8726PbF	R_DS(on) = 3.2 mΩ @ 10 V, same D-Pak package, but V_GS(th) = 1.0–2.5 V and no specified repetitive avalanche rating.	Lacks documented repetitive avalanche performance-requires external clamping in inductive loads.	Preferable for high-efficiency 5 V logic-driven SMPS where avalanche robustness is secondary to conduction loss.

Compared with STL120N5LF6AG and IRLR8726PbF, the AUIRLR3105 uniquely combines AEC-Q101 qualification, 55 V breakdown, and guaranteed repetitive avalanche operation-making it the only choice for unclamped inductive switching in certified automotive power stages.

Availability

AUIRLR3105 is available at Aetrix Electronics and suitable for engine control units, electric power steering systems, transmission control modules, and automotive DC-DC converters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AUIRLR3105 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 industrial control ICs-with over 25 years of automotive MOSFET leadership.

The AUIRLR3105 belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-reliability, high-temperature switching in engine, chassis, and safety-critical vehicle subsystems.

FAQ

Is AUIRLR3105 suitable for 48 V mild-hybrid applications?

Yes-the device's 55 V V_DS rating provides 10% margin above nominal 48 V bus, and its 175°C T_J rating supports operation in under-hood environments where ambient reaches 105°C. Tested avalanche energy (94 mJ) and low R_DS(on) ensure robustness during regenerative braking transients.

What is the maximum recommended gate resistor for driving AUIRLR3105 at 100 kHz?

A 24 Ω gate resistor is validated in the datasheet for 100 kHz switching with 25 A load, yielding 25 ns t_d(off) and 37 ns t_f. Lower values (≤10 Ω) improve switching speed but increase EMI risk; higher values (>47 Ω) cause excessive switching losses due to prolonged Miller plateau crossing.

Does AUIRLR3105 require a heatsink in a 25 A continuous application?

At 25 A and 30 mΩ R_DS(on), conduction loss is 18.75 W. With R_θJC = 2.65°C/W and a 40°C/W PCB copper pour, junction-to-ambient rise is ~115°C-exceeding 175°C T_Jmax if ambient is >60°C. A minimal heatsink or forced airflow is required for sustained 25 A operation above 60°C ambient.

Can AUIRLR3105 replace IRF3205 in automotive designs?

No-IRF3205 is not AEC-Q101 qualified, has 55 V V_DS but 7.5 mΩ R_DS(on) at 10 V, and lacks specified repetitive avalanche rating. Substituting it violates automotive functional safety requirements and risks field failure under load-dump or inductive switching stress.

AUIRLR3105 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

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:: 25A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V, 10V

Rds On (Max) @ Id, Vgs:: 37mOhm @ 15A, 10V

Vgs(th) (Max) @ Id:: 3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 20 nC @ 5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 710 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 57W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252AA (DPAK)

AUIRLR3105 FAQ

1.How can I place an order for AUIRLR3105 through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRLR3105 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 AUIRLR3105 reliable?

The price and inventory of AUIRLR3105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRLR3105 is usually 5 days.

3.What payment methods are accepted for AUIRLR3105?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRLR3105 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRLR3105?

AUIRLR3105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRLR3105 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 AUIRLR3105?

For technical support, including AUIRLR3105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRLR3105 requirements.

6.How does Aetrix verify that AUIRLR3105 is sourced from the original manufacturer or authorized distributors?

All AUIRLR3105 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 AUIRLR3105 meets industry standards.

7.What is the process for return or replacement of AUIRLR3105?

All AUIRLR3105 units undergo pre-shipment inspection (PSI). If there is an issue with AUIRLR3105, 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 AUIRLR3105 part is unused and in its original packaging.

Return procedure for AUIRLR3105:

1.Submit a request within 90 days.

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

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