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

Nexperia USA Inc. BUK7Y3R0-40HX

Name: BUK7Y3R0-40HX
Brand: Nexperia USA Inc.
SKU: BUK7Y3R0-40HX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7Y3R0-40HX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SC-100, SOT-669

Datasheet:: BUK7Y3R0-40HX.pdf

Description:: MOSFET N-CH 40V 120A LFPAK56

Quantity:: RFQ Add To RFQ list

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Inventory:2,990

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Product details

Overview

BUK7Y3R0-40HX from Nexperia is an automotive-qualified N-channel MOSFET with 40 V V_DS, 3.0 mΩ R_DS(on) at V_GS = 10 V and T_j = 25 °C, housed in LFPAK56 (SOT669) package. It delivers 120 A continuous drain current at T_mb = 25 °C and supports ultra-high-performance power switching in thermally demanding 12 V automotive systems.

For engineers reviewing the BUK7Y3R0-40HX datasheet, BUK7Y3R0-40HX pinout, BUK7Y3R0-40HX application, or BUK7Y3R0-40HX equivalent, this device is selected for high-current motor/solenoid control, start-stop micro-hybrid subsystems, and transmission electronics where AEC-Q101 qualification, low R_DS(on), and robust avalanche ruggedness (50 mJ) are critical.

Technical Context

This MOSFET employs Trench 9 Superjunction technology to achieve enhanced power density and efficiency within the LFPAK56 footprint. Its tight V_GS(th) limits (2.4–3.6 V at 25 °C) enable stable parallel operation, while its 175 °C junction rating supports sustained operation in under-hood environments.

The LFPAK56 package integrates copper clip construction for reduced R_th(j-mb) (0.77 K/W typ.) and lower R_DS(on), alongside gull-wing leads enabling AOI-compatible soldering and superior board-level reliability during thermal cycling versus QFN alternatives.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum drain-source blocking voltage for 12 V automotive system overvoltage protection
R_DS(on)	2.55 mΩ typ. @ V_GS = 10 V, I_D = 25 A, T_j = 25 °C - Enables <1 W conduction loss at 60 A, reducing heatsink requirements
I_D	120 A @ T_mb = 25 °C - Supports high-current loads like starter solenoids and HVAC blowers without derating
E_AS	50 mJ non-repetitive avalanche energy - Withstands unclamped inductive switching events in transmission valve drivers
R_th(j-mb)	0.77 K/W typ. - Enables efficient heat transfer to PCB copper or heatsink, critical for compact engine bay layouts
Q_GD	6.3 nC typ. - Low gate-drain charge minimizes Miller-induced turn-off delay in high-frequency PWM motor control
V_GS(th)	3.0 V typ. @ T_j = 25 °C - Ensures reliable turn-on with standard 3.3 V/5 V logic-level gate drivers

Pinout & Package

LFPAK56 (SOT669) is a single-ended surface-mount plastic package with 4 terminals and integrated copper clip for low-inductance, high-current capability. Mounting base (mb) is electrically connected to drain and serves as primary thermal path.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	Source (S)	Three parallel source terminals reduce package inductance and improve current sharing in high-di/dt switching
4	Gate (G)	Single gate input optimized for low-impedance drive; compatible with standard gate drivers without external series resistance
mb	Mounting Base / Drain (D)	Exposed copper drain pad provides low-thermal-resistance path to PCB and serves as main current return for high-power loads

Key Features

Feature	Design Value
AEC-Q101 qualified	Fully qualified for automotive applications including engine control, transmission, and start-stop systems
Trench 9 Superjunction architecture	Reduces R_DS(on) by ~25% vs. prior-generation TrenchMOS in same footprint, improving power density
LFPAK copper clip construction	Lowers R_DS(on) and R_th(j-mb) simultaneously-enabling higher current and better thermal margin
Gull-wing lead form	Enables automated optical inspection (AOI) without x-ray; improves solder joint reliability under thermal cycling
Tight V_GS(th) distribution	2.4–3.6 V range at 25 °C allows stable paralleling of up to 4 devices without current imbalance

Applications

Engine Start-Stop Control

Transmission Solenoid Driver

Use Scenario: High-current switching of starter motor engagement solenoids during automatic engine restart in micro-hybrid vehicles.

IC Role / Device Role / Timing Role: Main power switch controlling 80–100 A peak solenoid current with <10 ms turn-on response.

Use Value: 50 mJ avalanche rating absorbs inductive kickback without snubbers; 175 °C rating ensures reliability near hot exhaust manifolds.

Use Scenario: Precision on/off control of hydraulic pressure solenoids in 8-speed automatic transmissions.

IC Role / Device Role / Timing Role: High-duty-cycle, high-repetition-rate switch operating at 100–500 Hz PWM with fast fall time (<10 ns).

Use Value: Low Q_GD (6.3 nC) minimizes Miller plateau duration, enabling clean, jitter-free PWM edges critical for pressure stability.

12 V Electric Power Steering (EPS)

Body Control Module (BCM) Lamp Driver

Use Scenario: Bidirectional motor phase switching in brushless EPS assist motors requiring reverse recovery robustness.

IC Role / Device Role / Timing Role: Half-bridge high-side switch handling 40–60 A continuous current with synchronous rectification.

Use Value: Soft reverse recovery (S factor = 0.8) reduces EMI during diode commutation; low R_DS(on) cuts conduction losses in space-constrained EPS modules.

Use Scenario: High-side switching of LED headlamps and interior lighting in body control units with load dump protection.

IC Role / Device Role / Timing Role: Load switch managing up to 15 A steady-state lamp current with fast fault shutdown response.

Use Value: 40 V V_DS withstands ISO 7637-2 pulse 5a (load dump up to 40 V); gull-wing leads ensure solder joint integrity across 10-year vehicle life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4F7AG	40 V, 2.2 mΩ R_DS(on), PowerFLAT 5x6 package, 150 A I_D, no AEC-Q101 certification	Higher current rating but lacks automotive qualification; requires additional qualification effort for OEM use	Select only for non-automotive industrial applications where AEC-Q101 is not mandated
ON Semiconductor NTMFS4C09NT1G	40 V, 2.8 mΩ R_DS(on), SO-8FL package, 110 A I_D, AEC-Q101 qualified, higher R_th(j-mb) (1.1 K/W)	Lower thermal performance limits continuous current in high-ambient environments (>105 °C)	Prefer when board layout constraints favor SO-8FL footprint, accepting 15–20% higher thermal resistance

Compared with BUK7Y3R0-40HX, STL220N4F7AG offers lower R_DS(on) but no automotive qualification, while NTMFS4C09NT1G matches AEC-Q101 compliance but trades 30% higher thermal resistance-making BUK7Y3R0-40HX optimal for space- and thermal-constrained automotive power stages requiring certified reliability.

Availability

BUK7Y3R0-40HX is available at Aetrix Electronics and suitable for engine start-stop control, transmission solenoid actuation, and electric power steering systems requiring stable component supply across multi-year automotive production cycles.

Supply support for BUK7Y3R0-40HX 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 MOSFETs and ESD protection.

BUK7Y3R0-40HX belongs to Nexperia's LFPAK56 automotive MOSFET product line, engineered specifically for high-current, high-temperature 12 V automotive power switching where AEC-Q101 compliance, low R_DS(on), and robust thermal performance are mandatory.

FAQ

What is the maximum continuous drain current for BUK7Y3R0-40HX at 105 °C mounting base temperature?

At T_mb = 105 °C, the normalized power dissipation curve (Fig. 1) shows ~55% derating, reducing P_tot from 172 W to ~95 W. Using R_DS(on) = 3.6 mΩ (typ. at T_j = 105 °C), the practical continuous I_D is approximately 75 A-limited by thermal design rather than absolute rating.

Does BUK7Y3R0-40HX support gate drive from a 3.3 V microcontroller without level shifting?

No. With V_GS(th) min = 2.4 V and R_DS(on) strongly dependent on V_GS, a 3.3 V drive yields significantly elevated R_DS(on) (>10 mΩ), causing excessive conduction loss. A 5 V or 10 V gate driver is required to achieve rated 3.0 mΩ performance and full 120 A capability.

How does the LFPAK56 package compare to traditional DPAK in terms of thermal performance?

BUK7Y3R0-40HX's LFPAK56 achieves R_th(j-mb) = 0.77 K/W, ~40% lower than typical DPAK (1.2–1.4 K/W). This results from copper clip construction and direct die-to-mounting-base thermal path-enabling 25–30% higher current handling at the same board temperature rise.

Is the source-drain diode suitable for synchronous rectification in a buck converter?

Yes-the diode exhibits soft reverse recovery (S = 0.8) and low Q_r = 19.5 nC, minimizing switching loss and EMI. However, its V_SD = 0.8–1.2 V at 25 A means conduction loss exceeds that of an external Schottky in high-efficiency designs; best used in cost-sensitive, moderate-efficiency applications.

BUK7Y3R0-40HX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 120A (Tc)

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

Rds On (Max) @ Id, Vgs:: 3mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 3.6V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 59 nC @ 10 V

Vgs (Max):: +20V, -10V

Input Capacitance (Ciss) (Max) @ Vds:: 5449 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 172W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56, Power-SO8

BUK7Y3R0-40HX FAQ

1.How can I place an order for BUK7Y3R0-40HX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7Y3R0-40HX 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 BUK7Y3R0-40HX reliable?

The price and inventory of BUK7Y3R0-40HX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7Y3R0-40HX is usually 5 days.

3.What payment methods are accepted for BUK7Y3R0-40HX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7Y3R0-40HX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7Y3R0-40HX?

BUK7Y3R0-40HX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7Y3R0-40HX 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 BUK7Y3R0-40HX?

For technical support, including BUK7Y3R0-40HX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7Y3R0-40HX requirements.

6.How does Aetrix verify that BUK7Y3R0-40HX is sourced from the original manufacturer or authorized distributors?

All BUK7Y3R0-40HX 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 BUK7Y3R0-40HX meets industry standards.

7.What is the process for return or replacement of BUK7Y3R0-40HX?

All BUK7Y3R0-40HX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7Y3R0-40HX, 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 BUK7Y3R0-40HX part is unused and in its original packaging.

Return procedure for BUK7Y3R0-40HX:

1.Submit a request within 90 days.

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

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