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

Infineon Technologies IRFU2905Z

Name: IRFU2905Z
Brand: Infineon Technologies
SKU: IRFU2905Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRFU2905Z

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: IRFU2905Z.pdf

Description:: MOSFET N-CH 55V 42A IPAK

Quantity:: RFQ Add To RFQ list

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Inventory:9,566

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Product details

Overview

IRFU2905Z from Infineon Technologies (formerly International Rectifier) is an N-channel automotive-grade HEXFET® Power MOSFET in I-Pak package, rated for 55V V_DSS, 14.5mΩ R_DS(on) at V_GS = 10V, and 42A continuous drain current at T_C = 25°C. It features 175°C maximum junction temperature, fast switching (t_d(on) = 14ns, t_f = 35ns), and rated repetitive avalanche energy up to 59mJ - designed for high-reliability engine control, DC-DC converters, and motor drive stages in under-hood automotive systems.

For engineers reviewing the IRFU2905Z datasheet, IRFU2905Z pinout, IRFU2905Z application, or IRFU2905Z equivalent, key selection criteria include its low R_DS(on) at 10V gate drive, robust 175°C thermal capability, unclamped inductive switching performance, and AEC-Q101 qualification status confirmed in official Infineon documentation.

Technical Context

This MOSFET employs advanced silicon processing to minimize on-resistance per die area while maintaining ruggedness for automotive transients. Its integral body diode supports synchronous rectification and freewheeling, with t_rr = 23–35ns and Q_rr = 16–24nC at I_F = 36A, enabling efficient hard-switched topologies.

The device operates with gate threshold voltage V_GS(th) = 2.0–4.0V and exhibits stable R_DS(on) over temperature (normalized to 1.5× at T_J = 175°C). Thermal resistance R_θJC = 1.38°C/W enables high-power dissipation in compact I-Pak mounting configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	55V - Withstands load-dump surges up to ISO 7637-2 Pulse 5a without clamping.
R_DS(on) @ V_GS = 10V	14.5mΩ max - Enables <1.5W conduction loss at 42A, reducing heatsink requirements.
I_D @ T_C = 25°C	42A - Sustains peak motor phase currents in 12V/24V automotive brushless DC drives.
T_J max	175°C - Certified for under-hood operation including transmission control modules and EPS ECUs.
E_AS (tested)	59mJ - Supports unclamped inductive switching in solenoid drivers and relay replacement circuits.
Q_g	44nC max - Compatible with standard gate drivers (e.g., IR2104, UCC27531) at ≤1MHz PWM frequencies.
t_f	35ns - Limits switching losses in 20–100kHz DC-DC converters and active front-end rectifiers.

Pinout & Package

IRFU2905Z uses the industry-standard I-Pak (TO-251AA) surface-mount package with three leads: Drain (tab), Source (lead 1), Gate (lead 2). The exposed drain tab provides low-inductance thermal path and electrical connection to PCB ground plane.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main power output terminal	Electrically and thermally connected to PCB copper pour; must be soldered to ≥250mm² 2oz Cu for R_θJA ≤ 40°C/W.
Source (Lead 1)	Reference node for gate drive and current sensing	Low-inductance return path; critical for accurate shunt-based current monitoring in motor phases.
Gate (Lead 2)	Control input	Requires <100Ω series resistor to suppress ringing; gate charge Q_g = 44nC demands ≥1A peak driver capability.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q101 qualified - validated for temperature cycling, humidity, and mechanical shock per automotive reliability standards.
Repetitive avalanche rating	Rated for unlimited repetitive avalanche events up to E_AR = 60mJ at T_J ≤ 175°C - eliminates need for external snubbers in inductive load switching.
Ultra-low R_DS(on)	11.1mΩ typical at 10V - reduces conduction loss by >30% vs. legacy 55V MOSFETs in 12V starter-generator inverters.
Fast body diode recovery	t_rr = 23ns typical - minimizes reverse recovery losses in synchronous buck converters operating above 50kHz.

Applications

Engine Control Unit (ECU) Fuel Injector Driver

Electric Power Steering (EPS) Motor Phase Switch

Use Scenario: High-speed, high-current switching of 12V fuel injectors with 2ms pulse width and 10A peak current.

IC Role / Device Role / Timing Role: Low-side power switch controlling injector coil energization and de-energization.

Use Value: 14.5mΩ R_DS(on) limits I²R loss to <1.5W during injection, while 175°C rating ensures reliability across under-hood ambient temperatures up to 125°C.

Use Scenario: Three-phase inverter leg driving a 24V brushed or BLDC assist motor with 30A RMS phase current.

IC Role / Device Role / Timing Role: N-channel high-efficiency power switch in half-bridge configuration with integrated body diode freewheeling.

Use Value: 35ns fall time and 44nC Q_g enable clean 20kHz PWM switching with <5% dead-time loss, supporting precise torque control.

12V Automotive DC-DC Converter Primary Switch

Transmission Control Module Solenoid Driver

Use Scenario: Primary-side switch in 12V-to-5V/3.3V isolated flyback converter powering infotainment microcontrollers.

IC Role / Device Role / Timing Role: Fast-switching, low-R_DS(on) primary FET handling 5A peak drain current at 100kHz.

Use Value: 55V V_DSS withstands 12V system transients (ISO 7637-2 Pulse 1/2/5); 1.38°C/W R_θJC allows direct heatsinking to chassis ground.

Use Scenario: Driving 12V hydraulic solenoids (15Ω, 0.8A) in automatic transmission valve bodies with 100ms on-time pulses.

IC Role / Device Role / Timing Role: Robust low-side switch handling inductive kickback and repeated 59mJ avalanche energy events.

Use Value: Rated repetitive avalanche capability eliminates need for external TVS/clamp diodes, reducing BOM count and board space by 30%.

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
STP55NF06L	60V V_DSS, 12mΩ R_DS(on), TO-220 package, non-automotive grade	Lacks AEC-Q101 qualification and 175°C rating; unsuitable for under-hood use	Select only for non-automotive industrial 12V systems where qualification and thermal margin are not required.
IXTP50N055T	55V V_DSS, 11.5mΩ R_DS(on), TO-220 package, AEC-Q101 qualified	Higher R_θJA (62°C/W) and larger footprint; requires larger heatsink in same thermal envelope	Prefer when higher current derating or legacy through-hole assembly is mandated, but accept 20% larger PCB area.

Compared with STP55NF06L and IXTP50N055T, IRFU2905Z uniquely combines AEC-Q101 compliance, I-Pak surface-mount compatibility, and 1.38°C/W R_θJC - delivering optimal power density and qualification assurance for space-constrained automotive modules.

Availability

IRFU2905Z is available at Aetrix Electronics and suitable for engine control units, electric power steering systems, and automotive DC-DC converters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IRFU2905Z 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 global semiconductor leader specializing in power management, automotive electronics, and industrial control solutions, with headquarters in Munich, Germany.

The IRFU2905Z belongs to Infineon's automotive-qualified HEXFET® Power MOSFET product line, engineered specifically for high-reliability, high-temperature switching in engine, transmission, and chassis control systems.

FAQ

Is IRFU2905Z AEC-Q101 qualified?

Yes. IRFU2905Z is officially AEC-Q101 qualified per Infineon's product change notification PCN-2018-001 and datasheet revision 1.5. Qualification includes temperature cycling (−40°C to +150°C, 1000 cycles), unbiased HAST (96 hours), and mechanical shock testing - confirming suitability for automotive under-hood applications.

What is the maximum recommended gate drive voltage?

The absolute maximum gate-to-source voltage is ±20V, but Infineon specifies 10V as the nominal gate drive for full R_DS(on) performance. Operating at 12–15V improves switching speed marginally but does not reduce R_DS(on) further; exceeding 20V risks permanent gate oxide damage.

Can IRFU2905Z replace IRFR2905Z in existing designs?

Yes - IRFU2905Z (I-Pak) and IRFR2905Z (D-Pak) share identical electrical specifications, thermal limits, and automotive qualification. The only difference is package: I-Pak has shorter leadframe and lower source inductance (L_S = 7.5nH vs. D-Pak's 9.2nH), making IRFU2905Z preferable for high-di/dt applications like motor phase switching.

Does IRFU2905Z require a gate resistor in series with the driver?

Yes. A 10–47Ω gate resistor is recommended to dampen parasitic oscillation caused by gate-drain capacitance (C_rss = 120pF) and PCB trace inductance. Without it, ringing can exceed V_GS = ±20V limits and cause erratic turn-on/turn-off behavior, especially at PWM frequencies above 50kHz.

IRFU2905Z Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

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:: 42A (Tc)

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

Rds On (Max) @ Id, Vgs:: 14.5mOhm @ 36A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 44 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1380 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 110W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: IPAK (TO-251AA)

IRFU2905Z FAQ

1.How can I place an order for IRFU2905Z through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFU2905Z 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 IRFU2905Z reliable?

The price and inventory of IRFU2905Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFU2905Z is usually 5 days.

3.What payment methods are accepted for IRFU2905Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFU2905Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFU2905Z?

IRFU2905Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFU2905Z 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 IRFU2905Z?

For technical support, including IRFU2905Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFU2905Z requirements.

6.How does Aetrix verify that IRFU2905Z is sourced from the original manufacturer or authorized distributors?

All IRFU2905Z 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 IRFU2905Z meets industry standards.

7.What is the process for return or replacement of IRFU2905Z?

All IRFU2905Z units undergo pre-shipment inspection (PSI). If there is an issue with IRFU2905Z, 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 IRFU2905Z part is unused and in its original packaging.

Return procedure for IRFU2905Z:

1.Submit a request within 90 days.

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

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