Bipolar transistors

Diodes

ESD protection, TVS, filtering and signal conditioning

MOSFETs

SiC MOSFETs

GaN FETs

IGBTs

Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

BUK9509-40B

N-channel TrenchMOS logic level FET

Logic level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using TrenchMOS technology. This product has been designed and qualified to the appropriate AEC standard for use in automotive critical applications.

This product has been discontinued

Features and benefits

  • Low conduction losses due to low on-state resistance

  • Q101 compliant

  • Suitable for logic level gate drive sources

  • Suitable for thermally demanding environments due to 175 °C rating

Applications

  • 12 V loads

  • Automotive systems

  • General purpose power switching

  • Motors, lamps and solenoids

Parametrics

Type number Package version Package name Product status Channel type Nr of transistors VDS [max] (V) RDSon [max] @ VGS = 10 V (mΩ) RDSon [max] @ VGS = 5 V (mΩ) RDSon [max] @ VGS = 4.5 V; @25 C (mΩ) Tj [max] (°C) ID [max] (A) QGD [typ] (nC) Ptot [max] (W) Qr [typ] (nC) VGSth [typ] (V) Automotive qualified Ciss [typ] (pF) Coss [typ] (pF) Release date
BUK9509-40B SOT78A TO-220AB End of life N 1 40 7 9 10 175 95 12 157 47 1.5 Y 2700 450 2010-09-02

Package

All type numbers in the table below are discontinued.

Type number Orderable part number, (Ordering code (12NC)) Status Marking Package Package information Reflow-/Wave soldering Packing
BUK9509-40B BUK9509-40B,127
(934057696127)		 Obsolete BUK9509 40B P**XXYY AZ Batch No. SOT78A
TO-220AB
(SOT78A) 		SOT78A Not available

Environmental information

All type numbers in the table below are discontinued.

Type number Orderable part number Chemical content RoHS RHF-indicator
BUK9509-40B BUK9509-40B,127 BUK9509-40B rohs rhf rhf
Quality and reliability disclaimer

Series

Documentation (15)

File name Title Type Date
BUK9509-40B N-channel TrenchMOS logic level FET Data sheet 2010-06-14
AN10273 Power MOSFET single-shot and repetitive avalanche ruggedness rating Application note 2022-06-20
AN10874_ZH LFPAK MOSFET thermal design guide, Chinese version Application note 2020-04-30
AN11113_ZH LFPAK MOSFET thermal design guide - Part 2 Application note 2020-04-30
AN11156 Using Power MOSFET Zth Curves Application note 2021-01-04
AN11158 Understanding power MOSFET data sheet parameters Application note 2020-07-06
AN11158_ZH Understanding power MOSFET data sheet parameters Application note 2021-01-04
AN11160 Designing RC Snubbers Application note 2024-10-21
AN11243 Failure signature of Electrical Overstress on Power MOSFETs Application note 2017-12-21
AN11261 RC Thermal Models Application note 2021-03-18
AN11599 Using power MOSFETs in parallel Application note 2016-07-13
AN11172 Mounting instructions for SOT78 (TO-220AB); SOT186A (TO-220F) Application note 2021-05-21
Nexperia_package_poster Nexperia package poster Leaflet 2020-05-15
SOT78A plastic, single-ended package (heatsink mounted, 1 mounting hole); 3 leads; 2.54 mm pitch; 15.5 mm x 10 mm x 4.3 mm body Package information 2020-04-21
TN00008 Power MOSFET frequently asked questions and answers Technical note 2024-08-09

Support

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Models

No documents available

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.

Interactive datasheet