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 IRFU9120N

Name: IRFU9120N
Brand: Infineon Technologies
SKU: IRFU9120N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: IRFU9120N

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRFU9120N.pdf

Description:: MOSFET P-CH 100V 6.6A IPAK

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,508

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

Product details

Overview

IRFU9120N from International Rectifier is a P-channel enhancement-mode HEXFET® Power MOSFET in TO-251AA (I-Pak) package, rated for -100V V_DS, 0.48Ω R_DS(on) at V_GS = -10V, and -6.6A continuous drain current at T_C = 25°C. It features fully avalanche-rated operation, fast switching (t_r = 47ns, t_f = 31ns), and is designed for through-hole mounting in DC-DC converters and motor control circuits.

For engineers reviewing the IRFU9120N datasheet, IRFU9120N pinout, IRFU9120N application, or IRFU9120N equivalent, key selection criteria include its negative threshold voltage (-2.0 to -4.0V), low gate charge (Q_g = 27nC), body diode forward voltage (-1.6V at -3.9A), and junction-to-ambient thermal resistance of 110°C/W in free-air mounting.

Technical Context

This P-channel MOSFET operates with gate drive referenced to source, requiring negative V_GS for turn-on. Its ruggedized construction supports unclamped inductive switching with single-pulse avalanche energy up to 100mJ and repetitive avalanche rating of 4.0mJ.

The device uses fifth-generation HEXFET processing for low on-resistance per die area and integrates a fast-recovery body diode (t_rr = 100–150ns, Q_rr = 420–630nC), enabling efficient synchronous rectification and high-side switch applications where reverse recovery performance is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	-100V - Maximum blocking voltage in high-side switch or reverse polarity protection configurations
R_DS(on)	0.48Ω @ V_GS = -10V - Low conduction loss enabling <1W dissipation at 4.5A continuous load
I_D (continuous)	-6.6A @ T_C = 25°C - Supports medium-power loads such as 12V/24V industrial motor drivers
Q_g	27nC - Enables efficient gate driving with standard logic-level or discrete gate drivers
t_r/t_f	47ns/31ns - Fast edge rates reduce switching losses in PWM frequencies up to 200kHz
E_AS	100mJ - Withstands unclamped inductive energy during fault conditions without failure
V_GS(th)	-2.0 to -4.0V - Ensures reliable turn-on with standard -5V/-12V gate drive rails

Pinout & Package

IRFU9120N is housed in TO-251AA (I-Pak) package - a three-lead, through-hole variant of the D-Pak family, with leads bent vertically for PCB insertion and soldering. The exposed drain pad provides mechanical stability and thermal path to the board.

Pin/Terminal	Circuit Role	Design Meaning
1 - Gate	Control electrode	Receives negative V_GS to modulate channel conductivity; high input impedance minimizes driver current demand
2 - Drain	High-side power terminal	Connected to positive rail in high-side switch; electrically tied to exposed metal tab for thermal conduction
3 - Source	Reference node	Serves as return path and gate reference; determines common-mode voltage for gate drive circuitry

Key Features

Feature	Design Value
Fully avalanche rated	Withstands 100mJ single-pulse and 4.0mJ repetitive avalanche energy without degradation
Ultra-low R_DS(on)	0.48Ω enables <1.5W conduction loss at 6A, reducing heatsink requirements
Fast body diode	100–150ns reverse recovery time and 420–630nC Q_rr support high-frequency synchronous rectification
P-channel topology	Enables high-side switching without level-shifting gate drivers in 12V/24V systems
TO-251AA through-hole package	Provides robust mechanical retention and improved thermal transfer vs. SO-8 or SOT-23 alternatives

Applications

Reverse Polarity Protection

High-Side Load Switch

Use Scenario: Input protection for 12V/24V automotive ECUs and industrial controllers against battery misconnection.

IC Role / Device Role / Timing Role: P-channel MOSFET configured as series pass element between supply and system ground return.

Use Value: Blocks reverse current flow with <0.5V drop at full load, eliminating need for bulky Schottky diodes.

Use Scenario: Controlled power-up sequencing for microcontroller peripherals and sensor subsystems.

IC Role / Device Role / Timing Role: High-side switch enabling precise enable/disable timing via microcontroller GPIO.

Use Value: Delivers clean power ramp with no shoot-through risk and minimal inrush due to controlled V_GS slew rate.

DC-DC Converter Sync Rectifier

Brushed DC Motor H-Bridge

Use Scenario: Secondary-side rectification in isolated flyback or forward converters operating at 100–200kHz.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing output Schottky diode to improve efficiency.

Use Value: Reduces conduction loss by >60% vs. 40V Schottky, increasing converter efficiency from 82% to 87% at 5A load.

Use Scenario: Low-side switch in one quadrant of an H-bridge driving 12V brushed motors in robotics and actuators.

IC Role / Device Role / Timing Role: Complementary P-channel switch paired with N-channel high-side devices.

Use Value: Provides matched R_DS(on) and thermal profile with IRF9520N-based designs, simplifying layout and thermal management.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF9520PBF	V_DS = -100V, R_DS(on) = 0.60Ω @ -10V, TO-220 package	Higher thermal resistance (65°C/W junction-to-case), requires heatsink for >3A operation	Select when board space allows TO-220 mounting and higher peak current capability is needed
IRFR9120N	Identical electrical specs, but in surface-mount TO-252AA (D-Pak) package	No through-hole leads; optimized for automated assembly and lower profile	Select for PCB space-constrained designs requiring reflow compatibility and reduced height

Compared with IRF9520PBF, IRFU9120N offers lower R_DS(on) and through-hole reliability; compared with IRFR9120N, it trades SMT efficiency for mechanical robustness and manual repairability in prototyping and field-serviceable equipment.

Availability

IRFU9120N is available at Aetrix Electronics and suitable for reverse polarity protection, high-side load switching, DC-DC converter synchronous rectification, and brushed DC motor control requiring stable component supply across automotive, industrial, and embedded power systems.

Supply support for IRFU9120N 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

International Rectifier (now part of Infineon Technologies) was a pioneer in power semiconductor design, specializing in high-efficiency MOSFETs, IGBTs, and driver ICs for industrial and automotive markets.

The HEXFET® product line was engineered for rugged, high-reliability power switching - emphasizing low R_DS(on), fast switching, and avalanche survivability in harsh environments like engine control units and factory automation.

FAQ

What is the maximum safe operating temperature for IRFU9120N?

The IRFU9120N has a maximum junction temperature of +150°C and a storage temperature range of -55°C to +150°C. Its thermal resistance is 110°C/W (junction-to-ambient, free-air), so continuous operation at full -6.6A requires careful thermal design - typically limiting ambient temperature to ≤50°C without heatsinking or PCB copper area.

Can IRFU9120N be driven directly from a 3.3V microcontroller GPIO?

No - its gate threshold voltage ranges from -2.0V to -4.0V, and full enhancement requires V_GS ≤ -10V. A 3.3V GPIO cannot produce the necessary negative gate-source potential. A dedicated gate driver (e.g., TC4427 with inverting configuration) or level-shifting circuit is required for reliable turn-on.

Does IRFU9120N include integrated ESD protection?

No - the device lacks on-chip ESD protection structures. Gate oxide is sensitive to electrostatic discharge; external Zener clamps (e.g., 12V TVS between gate and source) and strict handling protocols (grounded workstations, anti-static packaging) are mandatory during assembly and testing.

How does the body diode performance compare to discrete Schottky diodes?

The integrated body diode has V_SD = -1.6V at -3.9A and t_rr = 100–150ns, making it slower and higher-drop than most Schottkys. It is suitable for non-critical freewheeling but not recommended for high-efficiency synchronous rectification unless gate timing precisely controls conduction to minimize diode conduction time.

IRFU9120N 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:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 6.6A (Tc)

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

Rds On (Max) @ Id, Vgs:: 480mOhm @ 3.9A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 27 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 350 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 40W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

IRFU9120N FAQ

1.How can I place an order for IRFU9120N through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFU9120N 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 IRFU9120N reliable?

The price and inventory of IRFU9120N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFU9120N is usually 5 days.

3.What payment methods are accepted for IRFU9120N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFU9120N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFU9120N?

IRFU9120N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFU9120N 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 IRFU9120N?

For technical support, including IRFU9120N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFU9120N requirements.

6.How does Aetrix verify that IRFU9120N is sourced from the original manufacturer or authorized distributors?

All IRFU9120N 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 IRFU9120N meets industry standards.

7.What is the process for return or replacement of IRFU9120N?

All IRFU9120N units undergo pre-shipment inspection (PSI). If there is an issue with IRFU9120N, 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 IRFU9120N part is unused and in its original packaging.

Return procedure for IRFU9120N:

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…