N-channel 40 V, 3.0 mΩ standard level MOSFET in LFPAK56

Automotive qualified N-channel MOSFET using the latest Trench 9 low ohmic superjunction technology, housed in a robust LFPAK56 package. This product has been fully designed and qualified to meet AEC-Q101 requirements delivering high performance and endurance.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
BUK7Y3R0-40H BUK7Y3R0-40HX 934660085115 SOT669 Order product
BUK7Y3R0-40H/A002 BUK7Y3R0-40H/A002X 934665443115 SOT669 Order product

Features and benefits

  • Fully automotive qualified to AEC-Q101:
    • 175 °C rating suitable for thermally demanding environments

  • Trench 9 Superjunction technology:
    • Reduced cell pitch enables enhanced power density and efficiency with lower RDSon in same footprint

    • Improved SOA and avalanche capability compared to standard TrenchMOS

    • Tight VGS(th) limits enable easy paralleling of MOSFETs

  • LFPAK Gull Wing leads:
    • High Board Level Reliability absorbing mechanical stress during thermal cycling, unlike traditional QFN packages

    • Visual (AOI) soldering inspection, no need for expensive x-ray equipment

    • Easy solder wetting for good mechanical solder joint

  • LFPAK copper clip technology:
    • Improved reliability, with reduced Rth and RDSon

    • Increases maximum current capability and improved current spreading


  • 12 V automotive systems

  • Motors, lamps and solenoid control

  • Start-Stop micro-hybrid applications

  • Transmission control

  • Ultra high performance power switching


Type numberPackage versionPackage nameProduct statusChannel typeNr of transistorsVDS [max] (V)RDSon [max] @ VGS = 10 V (mΩ)Tj [max] (°C)ID [max] (A)QGD [typ] (nC)QG(tot) [typ] @ VGS = 10 V (nC)Ptot [max] (W)Qr [typ] (nC)VGSth [typ] (V)Automotive qualifiedCiss [typ] (pF)Coss [typ] (pF)Date
BUK7Y3R0-40HSOT669LFPAK56; Power-SO8ProductionN14031751206.33417219.53Y24176882017-07-04

PCB Symbol, Footprint and 3D Model

Model NameDescription


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9346 600 85115 )
LFPAK56; Power-SO8
( 9346 654 43115 )
LFPAK56; Power-SO8

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicator
Quality and reliability disclaimer

Documentation (17)

File nameTitleTypeDate
BUK7Y3R0-40HN-channel 40 V, 3.0 mΩ standard level MOSFET in LFPAK56Data sheet2018-05-11
AN10273Power MOSFET single-shot and repetitive avalanche ruggedness ratingApplication note2022-06-20
AN11158Understanding power MOSFET data sheet parametersApplication note2020-07-06
AN11160Designing RC SnubbersApplication note2023-02-03
AN11156Using Power MOSFET Zth CurvesApplication note2021-01-04
AN11243Failure signature of Electrical Overstress on Power MOSFETsApplication note2017-12-21
AN11261RC Thermal ModelsApplication note2021-03-18
AN11599Using power MOSFETs in parallelApplication note2016-07-13
AN90001Designing in MOSFETs for safe and reliable gate-drive operationApplication note2017-05-05
nexperia_document_leaflet_LFPAK56_LR_2020The automotive Power-SO8 that packs a punchLeaflet2020-04-22
BUK7xxxx-40H_LTspice_V3BUK7xxxx-40H Precision ElectroThermal (PET) LTspice modelPET SPICE model2022-09-26
BUK7Y3R0-40HBUK7Y3R0-40HSPICE model2017-08-11
TN00008Power MOSFET frequently asked questions and answersTechnical note2023-01-12
BUK7Y3R0-40H_RCthermalBUK7Y3R0-40H_RCthermalThermal design2017-08-11
SOT669_115LFPAK56; Reel pack for SMD, 7"; Q1/T1 product orientationPacking information2022-05-10
REFLOW_BG-BD-1Reflow soldering profileReflow soldering2021-04-06
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08


If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.


File nameTitleTypeDate
BUK7xxxx-40H_LTspice_V3BUK7xxxx-40H Precision ElectroThermal (PET) LTspice modelPET SPICE model2022-09-26
BUK7Y3R0-40HBUK7Y3R0-40HSPICE model2017-08-11
BUK7Y3R0-40H_RCthermalBUK7Y3R0-40H_RCthermalThermal design2017-08-11

PCB Symbol, Footprint and 3D Model

Model NameDescription

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingPacking quantityBuy online
BUK7Y3R0-40HBUK7Y3R0-40HX934660085115SOT669_115- Order product
BUK7Y3R0-40H/A002BUK7Y3R0-40H/A002X934665443115SOT669_115- Order product


As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.

How does it work?

The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.