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

Infineon Technologies IRFR7440PBF

Name: IRFR7440PBF
Brand: Infineon Technologies
SKU: IRFR7440PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRFR7440PBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRFR7440PBF.pdf

Description:: MOSFET N CH 40V 90A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRFR7440PBF from Infineon Technologies is a 40 V, 90 A (package-limited), N-channel Trench MOSFET in D-Pak (TO-252) package, featuring 1.9 mΩ typical R_DS(on) at V_GS = 10 V, 140 W P_D, and enhanced body diode dV/dt/dI/dt capability - deployed in half-bridge motor drives and synchronous rectifiers for battery-powered inverters.

For engineers reviewing the IRFR7440PBF datasheet, IRFR7440PBF pinout, IRFR7440PBF application, or IRFR7440PBF equivalent, key selection criteria include silicon-limited vs. package-limited current rating (180 A vs. 90 A), avalanche energy (376 mJ), gate charge (89 nC typ.), and thermal resistance R_θJC = 1.05 °C/W for high-power switching reliability.

Technical Context

This MOSFET uses Infineon's StrongIRFET™ Trench technology optimized for low conduction loss and robust unclamped inductive switching. Its fully characterized avalanche SOA supports repetitive operation up to 376 mJ with I_AS = 27 A under defined L/R_G conditions, and its body diode exhibits 34 ns t_rr and 33 nC Q_rr at 25°C.

The device delivers high dV/dt ruggedness (4.4 V/ns peak diode recovery) and enhanced dynamic performance via low C_iss (4610 pF), C_oss (690 pF), and C_rss (460 pF), enabling fast switching in resonant-mode power supplies and PWM inverters operating up to 100 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	40 V - Maximum blocking voltage before avalanche; suitable for 24–36 V nominal bus systems.
R_DS(on) max	2.4 mΩ @ V_GS = 10 V, I_D = 90 A - Enables <1.5 W conduction loss at 90 A DC, critical for thermal management in compact motor drives.
I_D (package)	90 A continuous - Limited by bond wire capacity; defines real-world PCB-mount current handling without derating.
E_AS	376 mJ - Single-pulse avalanche energy at T_J = 25°C, L = 1 mH, I_AS = 27 A - Supports reliable unclamped inductive turn-off in bridge legs.
Q_g typ.	89 nC - Total gate charge at V_DS = 20 V, I_D = 90 A - Determines driver strength requirement (~1 A avg. for 100 ns switching).
R_θJC	1.05 °C/W - Junction-to-case thermal resistance - Enables direct heatsink mounting with predictable ΔT for 140 W dissipation.
t_r/t_f	39 ns / 34 ns - Rise/fall times at I_D = 30 A, V_DD = 20 V, R_G = 2.7 Ω - Confirms suitability for >200 kHz hard-switching topologies.

Pinout & Package

D-Pak (TO-252) package: surface-mount, single-drain-tab design with exposed drain pad for thermal and electrical connection. Standard 3-pin configuration: Drain (tab + Pin 2), Gate (Pin 1), Source (Pin 3).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (G)	Gate	Control terminal; requires ≥10 V drive for full enhancement; 2.6 Ω internal gate resistance limits ringing.
Pin 2 (D)	Drain	Main high-side current path; electrically and thermally connected to exposed copper tab - must be soldered to large PCB copper pour or heatsink.
Pin 3 (S)	Source	Reference node for gate drive and current sensing; tied to power ground in low-side switch configurations.

Key Features

Feature	Design Value
Enhanced body diode dV/dt capability	4.4 V/ns peak recovery - prevents false turn-on during high-speed commutation in BLDC and synchronous rectifier stages.
Fully characterized avalanche SOA	376 mJ single-pulse energy with validated thermal limits - enables robust operation in unclamped inductive loads without external snubbers.
Low gate charge (Q_g)	89 nC typ. - reduces driver power loss and enables efficient 100+ kHz switching in DC/DC converters.
Lead-free, RoHS-compliant construction	No Pb, Br, or halogens - meets IPC-J-STD-020 moisture sensitivity level 1 (MSL-1) for standard reflow assembly.

Applications

Brushed Motor Drive

BLDC Motor Drive

Use Scenario: H-bridge control of 24 V cordless power tools with peak currents up to 90 A.

IC Role / Device Role / Timing Role: Low-side N-channel switch in half-bridge leg; handles bidirectional current with body diode freewheeling.

Use Value: 1.9 mΩ R_DS(on) minimizes I²R heating during 30 s stall conditions, extending tool runtime and thermal margin.

Use Scenario: Six-step commutation in 36 V e-bike controller with 10–20 kHz PWM.

IC Role / Device Role / Timing Role: High-current phase-leg switch; synchronized with complementary FETs using dead-time controlled gate drivers.

Use Value: 34 ns t_rr and low Q_rr reduce shoot-through risk and switching losses during commutation transitions.

Synchronous Rectifier

DC/DC Converter

Use Scenario: Secondary-side rectification in 48 V–12 V isolated buck converter for telecom power shelves.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing Schottky diode; driven with precise timing relative to primary-side MOSFET.

Use Value: 0.9 V V_SD forward drop at 90 A cuts conduction loss by >50% vs. 0.5 A Schottky, improving efficiency above 94%.

Use Scenario: High-current POL (point-of-load) stage in server VRM delivering 60 A at 1.2 V.

IC Role / Device Role / Timing Role: High-side switch in multiphase buck topology; operated with adaptive gate drive and current-mode control.

Use Value: 140 W P_D and 1.05 °C/W R_θJC support sustained 60 A output with <30°C junction rise on 2-layer 1 oz Cu PCB.

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
IRLR7440PbF	Same die, TO-220AB package; higher R_θJA (62 °C/W), no exposed drain tab.	Better suited for through-hole prototyping or lower-density layouts where heatsinking is via clip or bolt.	Select when mechanical mounting constraints favor through-hole over SMT, and thermal interface allows higher ambient rise.
STL220N4F7AG	40 V, 220 A (package-limited), 1.4 mΩ R_DS(on), PowerFLAT 5x6 package; higher Q_g (120 nC).	Optimized for ultra-high-current automotive DC/DC; requires stronger gate driver due to higher capacitance.	Choose for space-constrained automotive modules needing >100 A continuous, accepting trade-off in gate drive complexity.

Compared with IRLR7440PbF and STL220N4F7AG, IRFR7440PBF offers superior thermal performance in SMT motor drive designs via its low R_θJC and exposed drain, while balancing gate drive demand and avalanche robustness better than the higher-capacitance ST part.

Availability

IRFR7440PBF is available at Aetrix Electronics and suitable for brushed motor drives, BLDC inverters, and synchronous rectifier circuits requiring stable component supply across industrial and portable power electronics programs.

Supply support for IRFR7440PBF 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 leader specializing in power management, automotive MCUs, and industrial sensors, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

This device belongs to Infineon's StrongIRFET™ family - engineered specifically for high-efficiency, high-reliability power conversion in motor control and switched-mode power supplies where ruggedness and low R_DS(on) are critical.

FAQ

What is the maximum continuous drain current for IRFR7440PBF at 100°C case temperature?

The maximum continuous drain current at T_C = 100°C is 125 A (silicon-limited), but the package-limited rating remains 90 A regardless of temperature. This reflects bond-wire current capacity, not junction thermal limits - users must ensure PCB layout and heatsinking sustain ≤100°C at the case for full 90 A operation.

Does IRFR7440PBF support synchronous rectification with zero-voltage switching (ZVS)?

Yes - its low Q_gd (26 nC) and fast t_r/t_f (39 ns/34 ns) enable clean ZVS turn-on in resonant LLC and phase-shifted full-bridge topologies. The body diode's 34 ns t_rr and 1.8 A I_RRM allow reliable soft-commutation when driven with precise gate timing relative to primary-side voltage zero-crossings.

Can IRFR7440PBF be used in parallel configurations without current-sharing resistors?

Yes - its positive R_DS(on) temperature coefficient (28 mV/°C V_BR drift) ensures inherent current sharing. However, matched gate drive loop inductance and symmetrical PCB layout are mandatory; parallel operation beyond two devices requires individual gate resistors (≥1 Ω) to damp oscillation and equalize switching edges.

Is the IRFR7440PBF pinout compatible with industry-standard D-Pak footprints?

Yes - it uses the JEDEC TO-252AA outline with 2.3 mm pin pitch, 6.5 mm body width, and 6.7 mm tab length. The drain tab aligns with standard IPC-7351B "DPAK" land pattern (0.5 mm solder mask expansion, 1.2 mm thermal relief spokes), supporting automated reflow per J-STD-020 MSL-1 profile.

IRFR7440PBF 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:: Discontinued at Digi-Key

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 90A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 6V, 10V

Rds On (Max) @ Id, Vgs:: 2.4mOhm @ 90A, 10V

Vgs(th) (Max) @ Id:: 3.9V @ 100µA

Gate Charge (Qg) (Max) @ Vgs:: 134 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 4610 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 140W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

IRFR7440PBF FAQ

1.How can I place an order for IRFR7440PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFR7440PBF 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 IRFR7440PBF reliable?

The price and inventory of IRFR7440PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFR7440PBF is usually 5 days.

3.What payment methods are accepted for IRFR7440PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFR7440PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFR7440PBF?

IRFR7440PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFR7440PBF 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 IRFR7440PBF?

For technical support, including IRFR7440PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFR7440PBF requirements.

6.How does Aetrix verify that IRFR7440PBF is sourced from the original manufacturer or authorized distributors?

All IRFR7440PBF 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 IRFR7440PBF meets industry standards.

7.What is the process for return or replacement of IRFR7440PBF?

All IRFR7440PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRFR7440PBF, 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 IRFR7440PBF part is unused and in its original packaging.

Return procedure for IRFR7440PBF:

1.Submit a request within 90 days.

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

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