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

Nexperia USA Inc. BUK9Y107-80EX

Name: BUK9Y107-80EX
Brand: Nexperia USA Inc.
SKU: BUK9Y107-80EX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9Y107-80EX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SC-100, SOT-669

Datasheet:: BUK9Y107-80EX.pdf

Description:: MOSFET N-CH 80V 11.8A LFPAK56

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Product details

Overview

BUK9Y107-80EX from Nexperia is an AEC-Q101 qualified N-channel logic-level MOSFET in LFPAK56 (SOT669) package, rated for 80 V V_DS, 107 mΩ R_DS(on) at V_GS = 5 V and T_j = 25 °C, with 175 °C junction temperature rating and repetitive avalanche capability - deployed in automotive transmission control and high-reliability 12–48 V power switching.

For engineers reviewing the BUK9Y107-80EX datasheet, BUK9Y107-80EX pinout, BUK9Y107-80EX application, or BUK9Y107-80EX equivalent, this device serves as a thermally robust, gate-threshold-stable switch for automotive motor and solenoid loads where logic-level drive (V_GS(th) > 0.5 V at 175 °C), low conduction loss, and ruggedness under transient stress are critical selection criteria.

Technical Context

This MOSFET uses TrenchMOS technology to achieve low R_DS(on) while maintaining stable threshold voltage across temperature (V_GS(th) ≥ 0.5 V up to 175 °C). Its LFPAK56 package integrates a thermally efficient mounting base directly connected to the drain, enabling 4.03 K/W junction-to-mounting-base thermal resistance.

The device supports true logic-level operation at 5 V gate drive, delivers 11.8 A continuous drain current at T_mb = 25 °C, and features repetitive avalanche rating with 9.4 mJ unclamped single-pulse energy - essential for inductive load commutation in automotive systems without external snubbers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	80 V maximum drain-source voltage - supports 48 V automotive systems with margin against load-dump transients.
R_DS(on)	89.7–107 mΩ at V_GS = 5 V, I_D = 5 A, T_j = 25 °C - enables low conduction loss in high-current switching paths.
I_D (continuous)	11.8 A at T_mb = 25 °C - sufficient for driving medium-power motors, lamps, and solenoids in vehicle body electronics.
T_j max	175 °C - allows operation in engine bay and transmission control units with minimal derating.
Q_GD	2.5 nC - low gate-drain charge reduces switching losses and improves EMI behavior in PWM-driven applications.
R_th(j-mb)	4.03 K/W - enables direct PCB copper pour thermal coupling to heatsink for compact, high-power-density designs.
E_AS	9.4 mJ (unclamped, single-pulse) - provides built-in ruggedness against inductive kickback without external clamping diodes.

Pinout & Package

LFPAK56 (SOT669) is a surface-mount plastic package with exposed mounting base (drain-connected) and four leads: three source terminals (Pins 1–3) and one gate terminal (Pin 4). The mounting base provides low-inductance, high-current drain connection and primary thermal path to PCB.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	Source	Parallel source connections reduce conduction resistance and improve current sharing; enable low-impedance return path for high-frequency switching.
4	Gate	Single gate input optimized for 5 V logic-level drive; low Q_G(tot) = 6.2 nC ensures fast, low-loss turn-on/turn-off.
Mounting Base	Drain	Exposed copper pad electrically and thermally connected to drain - serves as primary heat sink interface and high-current drain node.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use per stress test requirements - ensures reliability in safety-critical vehicle subsystems.
True logic-level gate	V_GS(th) ≥ 0.5 V at T_j = 175 °C - guarantees turn-on with standard 5 V microcontroller outputs even under worst-case thermal conditions.
Repetitive avalanche rated	Unclamped E_AS = 9.4 mJ - eliminates need for external avalanche protection in solenoid/motor drive circuits.
175 °C junction rating	Enables full-rated operation in under-hood environments without thermal derating penalties typical of 150 °C devices.
Low R_DS(on) × Q_G figure-of-merit	~665 mΩ·nC - balances conduction and switching losses for high-efficiency 10–100 kHz PWM control.

Applications

Transmission Control Module

Engine Cooling Fan Driver

Use Scenario: High-side switching of 12–24 V solenoid actuators controlling hydraulic pressure in automatic transmission valve bodies.

IC Role / Device Role / Timing Role: Power switch delivering precise on/off timing and current regulation via PWM, with fast fall time (7.3 ns) and low gate charge.

Use Value: Enables accurate shift timing and pressure modulation while surviving repeated inductive flyback events without external protection.

Use Scenario: Low-side PWM control of brushless DC cooling fans in engine compartments exposed to ambient temperatures up to 125 °C.

IC Role / Device Role / Timing Role: Thermally robust switching element handling 8.3 A continuous current at T_mb = 100 °C, with 175 °C junction limit ensuring long-term reliability.

Use Value: Eliminates thermal shutdown risk during sustained high-load operation and maintains R_DS(on) stability over full temperature range.

Body Control Unit Lamp Switching

48 V Mild Hybrid Auxiliary Load Switch

Use Scenario: Driving incandescent and LED headlamp position lamps and interior lighting in centralized body control modules.

IC Role / Device Role / Timing Role: Logic-level N-channel switch controlled directly by 5 V MCU GPIO, leveraging low V_GS(th) and parallel source pins for low forward voltage drop.

Use Value: Reduces system BOM count by removing level-shifting circuitry and minimizes PCB footprint versus SO-8 alternatives.

Use Scenario: High-side switching of auxiliary 48 V loads (e.g., HVAC compressors, active suspension pumps) in 48 V mild hybrid architectures.

IC Role / Device Role / Timing Role: Robust power switch rated for 80 V V_DS with 107 mΩ R_DS(on) at 5 V drive - supports efficient operation at elevated bus voltages with margin.

Use Value: Provides design margin against ISO 21780 load-dump transients (up to 60 V) while maintaining low conduction loss at partial load.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel logic-level MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N6F7	60 V V_DS, 0.95 mΩ R_DS(on) at 10 V, not AEC-Q101 qualified; requires 10 V gate drive for optimal R_DS(on).	Limited to 24 V systems; unsuitable for 48 V or automotive safety-critical modules requiring AEC certification.	Select only for cost-sensitive industrial 24 V non-automotive applications where AEC-Q101 is not mandated.
ON Semiconductor NTMFS5C675NL	60 V V_DS, 1.15 mΩ R_DS(on) at 10 V, AEC-Q101 qualified, but V_GS(th) min = 1.2 V - not logic-level at 5 V.	Requires gate driver or higher V_GS; less suitable for direct MCU GPIO drive in thermally demanding locations.	Prefer when higher voltage margin is unnecessary and gate drive voltage can be boosted to 8–10 V for lowest R_DS(on).

Compared with STL220N6F7 and NTMFS5C675NL, BUK9Y107-80EX uniquely combines 80 V rating, true 5 V logic-level operation with high-temperature V_GS(th) stability, AEC-Q101 qualification, and integrated avalanche ruggedness - making it the only option among the three qualified for direct MCU-driven 48 V automotive power switching with no external protection.

Availability

BUK9Y107-80EX is available at Aetrix Electronics and suitable for automotive transmission control, engine cooling fan drivers, and 48 V mild hybrid auxiliary load switching requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.

Supply support for BUK9Y107-80EX 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified MOSFETs and advanced packaging.

BUK9Y107-80EX belongs to Nexperia's LFPAK logic-level automotive MOSFET product line, engineered specifically for thermally aggressive, safety-conscious automotive power switching applications requiring AEC-Q101 compliance and robustness against repetitive avalanche stress.

FAQ

Is BUK9Y107-80EX pin-compatible with standard SO-8 MOSFETs?

No - BUK9Y107-80EX uses the LFPAK56 (SOT669) package, which has a different footprint and thermal pad layout than SO-8. It features three parallel source pins and an exposed drain-connected mounting base, requiring dedicated PCB land pattern per Nexperia's SOT669 outline drawing. Direct SO-8 replacement is not mechanically or thermally feasible.

What is the maximum continuous drain current at 100 °C mounting base temperature?

The datasheet specifies 8.3 A continuous drain current at T_mb = 100 °C and V_GS = 5 V (Figure 1). This reflects thermal derating due to reduced heat dissipation capacity at elevated board temperatures, and must be used for thermal design validation in under-hood applications.

Does BUK9Y107-80EX require a gate resistor for automotive PWM applications?

Yes - although its Q_G(tot) is low (6.2 nC), a gate resistor (typically 5–22 Ω) is recommended to control dV/dt, suppress ringing, and limit peak gate current from MCU GPIOs. The datasheet's switching time test condition (R_G(ext) = 5 Ω) confirms this practice for reliable 10–100 kHz PWM operation in noisy automotive environments.

Can BUK9Y107-80EX replace older BUK9Y107-75B in existing designs?

Yes - BUK9Y107-80EX supersedes BUK9Y107-75B with identical pinout, package, and electrical specifications, plus enhanced 80 V V_DS rating (vs. 75 V) and updated AEC-Q101 qualification. No layout or firmware changes are required, and the higher voltage rating provides additional margin for 48 V system transients.

BUK9Y107-80EX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: TrenchMOS™

Package/Case:: SC-100, SOT-669

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 80 V

Current - Continuous Drain (Id) @ 25°C:: 11.8A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V

Rds On (Max) @ Id, Vgs:: 98mOhm @ 5A, 10V

Vgs(th) (Max) @ Id:: 2.1V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 6.2 nC @ 5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 706 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 37W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56, Power-SO8

BUK9Y107-80EX FAQ

1.How can I place an order for BUK9Y107-80EX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9Y107-80EX 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 BUK9Y107-80EX reliable?

The price and inventory of BUK9Y107-80EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9Y107-80EX is usually 5 days.

3.What payment methods are accepted for BUK9Y107-80EX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9Y107-80EX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9Y107-80EX?

BUK9Y107-80EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9Y107-80EX 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 BUK9Y107-80EX?

For technical support, including BUK9Y107-80EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9Y107-80EX requirements.

6.How does Aetrix verify that BUK9Y107-80EX is sourced from the original manufacturer or authorized distributors?

All BUK9Y107-80EX 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 BUK9Y107-80EX meets industry standards.

7.What is the process for return or replacement of BUK9Y107-80EX?

All BUK9Y107-80EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK9Y107-80EX, 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 BUK9Y107-80EX part is unused and in its original packaging.

Return procedure for BUK9Y107-80EX:

1.Submit a request within 90 days.

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

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