Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies AUIRF3205Z

Name: AUIRF3205Z
Brand: Infineon Technologies
SKU: AUIRF3205Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AUIRF3205Z

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AUIRF3205Z.pdf

Description:: MOSFET N-CH 55V 75A TO220AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AUIRF3205Z from Infineon is an automotive-grade N-channel enhancement-mode HEXFET® Power MOSFET in TO-220AB package, rated for 55 V V_DSS, 6.5 mΩ R_DS(on) max at V_GS = 10 V and I_D = 66 A, with 175°C maximum junction temperature and 440 A pulsed drain current capability. It serves as a high-efficiency main power switch in 12 V automotive DC-DC converters, motor control inverters, and battery disconnect circuits.

For engineers reviewing the AUIRF3205Z datasheet, AUIRF3205Z pinout, AUIRF3205Z application, or AUIRF3205Z equivalent, key selection criteria include its ultra-low on-resistance under automotive thermal constraints, validated repetitive avalanche performance up to T_jmax, and RoHS-compliant lead-free construction qualified per AEC-Q101 standards.

Technical Context

This MOSFET employs advanced silicon processing to achieve 4.9 mΩ typical R_DS(on) at 10 V gate drive while maintaining robust unclamped inductive switching capability-tested to 250 mJ single-pulse avalanche energy with 66 A I_AS and 0.08 mH load inductance. Its gate threshold voltage (2.0–4.0 V) ensures stable turn-on across automotive temperature range (−55°C to +175°C).

Dynamic parameters include 76 nC total gate charge, 30 nC gate-to-drain charge, and fast switching times (t_d(on) = 18 ns, t_f = 67 ns) under 6.8 Ω gate resistance, enabling high-frequency operation in synchronous buck regulators and BLDC motor gate drivers without excessive drive loss.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	55 V - Maximum blocking voltage in off-state; supports 12 V automotive systems with ≥2× safety margin against load-dump transients.
R_DS(on) max	6.5 mΩ @ V_GS = 10 V, I_D = 66 A - Enables ≤0.43 W conduction loss at 80 A continuous, critical for thermally constrained engine bay layouts.
I_D (package-limited)	75 A @ T_C = 25°C - Defines maximum steady-state current with standard heatsinking; derates linearly at 1.1 W/°C above 25°C case temperature.
E_AS tested	250 mJ - Validated single-pulse avalanche energy at T_J = 25°C, L = 0.08 mH, I_AS = 66 A; enables reliable operation during inductive turn-off in motor drives.
T_J max	+175°C - Junction temperature rating aligned with AEC-Q101 Grade 0; allows direct mounting on hot surfaces (e.g., transmission housings) without thermal derating.
Q_g	76 nC typ. - Total gate charge determines required gate driver peak current (e.g., >11 A for 7 ns rise time), impacting driver IC selection in high-frequency designs.
R_θJC	0.90 °C/W - Junction-to-case thermal resistance confirms efficient heat transfer to heatsink; enables 170 W power dissipation at ΔT = 153°C.

Pinout & Package

TO-220AB package with isolated tab (drain-connected), 3-pin through-hole mounting. Tab is electrically connected to drain; mounting screw provides mechanical fixation and thermal path.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Left)	Source (S)	Main current return path; low-inductance connection essential for minimizing switching oscillation and body diode reverse recovery stress.
Pin 2 (Center)	Gate (G)	High-impedance control terminal; requires <100 nF local bypass and series resistor (6.8 Ω typical) to damp ringing and limit dv/dt-induced turn-on.
Pin 3 (Right)	Drain (D)	High-current output node; internally bonded to metal tab-must be electrically isolated from heatsink unless system ground reference permits.

Key Features

Feature	Design Value
Ultra-low R_DS(on)	4.9 mΩ typical at 10 V drive-reduces conduction losses by >30% vs. legacy 8 mΩ automotive MOSFETs at same current density.
Repetitive avalanche rated	Validated up to T_jmax per Fig.12a–12b and AN-1005-enables elimination of external snubbers in solenoid and relay driver applications.
175°C operating junction	Rated for continuous operation at full current up to ambient +150°C with proper heatsinking-meets under-hood thermal requirements without derating.
Fast switching with low Q_gd/Q_g	30 nC / 76 nC ratio = 0.39-minimizes Miller plateau duration, improving immunity to false turn-on during high dv/dt commutation.
AEC-Q101 qualified	Tested per stress conditions including HTOL, TC, UHAST, and ESD HBM ≥2 kV-ensures reliability in safety-critical automotive subsystems.

Applications

Engine Start-Stop System

Automotive HVAC Blower Control

Use Scenario: High-side switching of 12 V starter motor solenoid and auxiliary loads during micro-hybrid stop/start cycles with frequent 100+ A inrush currents.

IC Role / Device Role / Timing Role: Main power switch handling bidirectional current flow during cranking and regenerative braking phases; operates in hard-switched mode with <10 µs turn-off.

Use Value: 250 mJ avalanche rating absorbs inductive kickback without clamping diodes; 175°C rating sustains operation during extended idling with under-hood temperatures >105°C.

Use Scenario: PWM-controlled 12 V DC fan motor driving cabin air circulation, requiring variable speed and stall protection.

IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration; modulated at 20–25 kHz to minimize audible noise while maintaining torque linearity.

Use Value: 6.5 mΩ R_DS(on) limits conduction loss to <0.5 W at 75 A stall current; fast 67 ns fall time prevents shoot-through during bridge dead-time transitions.

12 V–48 V Bi-directional DC-DC Converter

Electric Power Steering (EPS) Motor Driver

Use Scenario: Synchronous rectification in automotive mild-hybrid boost converter linking 12 V battery and 48 V Li-ion storage bank.

IC Role / Device Role / Timing Role: High-side synchronous FET in buck-boost topology; switched at 100–200 kHz with precise gate timing to minimize body diode conduction.

Use Value: 3450 pF C_iss and 310 pF C_rss enable efficient zero-voltage switching (ZVS) assist; low Q_gd reduces gate drive power by 22% vs. comparable 8 mΩ devices.

Use Scenario: Three-phase inverter leg for 12 V brushless DC motor delivering steering assist torque up to 15 N·m.

IC Role / Device Role / Timing Role: Phase-leg low-side switch operating in six-step commutation; subjected to 440 A pulsed current during fault conditions.

Use Value: 440 A I_DM rating withstands short-circuit events per ISO 16750-2; 75 A package-limited current supports continuous 30 A RMS phase current with forced-air cooling.

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
STL220N5LF8AG	55 V, 2.2 mΩ R_DS(on), DFN5x6 package, 175°C rated, but only 130 A I_D (package-limited)	Requires PCB-level thermal management instead of bolt-on heatsink; unsuitable for TO-220 footprint replacement	Select when board space is constrained and thermal interface uses copper pour; avoid if mechanical mounting or legacy TO-220 socket required.
IRF3205PBF	55 V, 8.0 mΩ R_DS(on), TO-220AB, non-automotive grade, 175°C, no AEC-Q101 qualification	Lacks avalanche validation and high-temp reliability testing; not approved for safety-critical vehicle systems	Acceptable for cost-sensitive industrial or aftermarket accessories where AEC-Q101 compliance is not mandated.

Compared with STL220N5LF8AG and IRF3205PBF, AUIRF3205Z uniquely balances ultra-low on-resistance (6.5 mΩ), TO-220AB mechanical compatibility, and full AEC-Q101 qualification-making it the only choice for production automotive power stages requiring both thermal headroom and regulatory traceability.

Availability

AUIRF3205Z is available at Aetrix Electronics and suitable for engine control units, electric power steering modules, and 12 V–48 V bi-directional DC-DC converters requiring stable component supply across multi-year automotive production programs.

Supply support for AUIRF3205Z 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 global manufacturing and qualification infrastructure.

AUIRF3205Z belongs to the automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-reliability 12 V vehicle electrical systems demanding robustness against thermal cycling, voltage transients, and mechanical vibration.

FAQ

Is AUIRF3205Z pin-compatible with IRF3205?

Yes-AUIRF3205Z uses the identical TO-220AB package with source-gate-drain pinout (left-to-right: S-G-D). However, it features tighter R_DS(on) specification (6.5 mΩ vs. 8.0 mΩ), higher avalanche energy rating (250 mJ vs. 180 mJ), and AEC-Q101 qualification absent in the commercial IRF3205. Mechanical substitution is possible, but automotive use requires validation of the full qualification scope.

What is the recommended gate resistor value for AUIRF3205Z in a 100 kHz motor inverter?

A 6.8 Ω gate resistor is specified in the datasheet for switching characterization (t_d(off) = 45 ns, t_f = 67 ns). For 100 kHz operation, this value balances switching loss reduction and EMI control; values below 4.7 Ω increase dv/dt stress and risk parasitic turn-on, while values above 10 Ω raise total switching loss by >15% at 66 A load current.

Can AUIRF3205Z be used in parallel configurations?

Yes-its positive R_DS(on) temperature coefficient (0.051 V/°C) enables inherent current sharing. Parallel operation requires matched layout (identical trace length/width), individual gate resistors (≤10 Ω), and thermal coupling via shared heatsink. Derate total current by 15% versus sum of individual ratings to account for thermal imbalance.

Does AUIRF3205Z require a negative gate voltage for reliable turn-off in high-noise automotive environments?

No-its gate threshold voltage (2.0–4.0 V) and 20 V maximum V_GS rating allow robust turn-off with 0 V gate drive. However, applying −5 V enhances noise immunity during cranking transients; the device supports ±20 V V_GS, and −5 V bias reduces risk of spurious turn-on from coupled EMI without increasing gate driver complexity.

AUIRF3205Z Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 75A (Tc)

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

Rds On (Max) @ Id, Vgs:: 6.5mOhm @ 66A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 110 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 3450 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 170W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

AUIRF3205Z FAQ

1.How can I place an order for AUIRF3205Z through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRF3205Z 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 AUIRF3205Z reliable?

The price and inventory of AUIRF3205Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRF3205Z is usually 5 days.

3.What payment methods are accepted for AUIRF3205Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRF3205Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRF3205Z?

AUIRF3205Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRF3205Z 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 AUIRF3205Z?

For technical support, including AUIRF3205Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRF3205Z requirements.

6.How does Aetrix verify that AUIRF3205Z is sourced from the original manufacturer or authorized distributors?

All AUIRF3205Z 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 AUIRF3205Z meets industry standards.

7.What is the process for return or replacement of AUIRF3205Z?

All AUIRF3205Z units undergo pre-shipment inspection (PSI). If there is an issue with AUIRF3205Z, 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 AUIRF3205Z part is unused and in its original packaging.

Return procedure for AUIRF3205Z:

1.Submit a request within 90 days.

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

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…