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

Nexperia USA Inc. BUK7Y2R5-40HX

Name: BUK7Y2R5-40HX
Brand: Nexperia USA Inc.
SKU: BUK7Y2R5-40HX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7Y2R5-40HX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SC-100, SOT-669

Datasheet:: BUK7Y2R5-40HX.pdf

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

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Product details

Overview

BUK7Y2R5-40HX from Nexperia is an automotive-qualified N-channel MOSFET using Trench 9 superjunction technology in LFPAK56 (SOT669) package, rated for 40 V V_DS, 2.5 mΩ R_DS(on) at 10 V V_GS/25 A/25 °C, 120 A continuous drain current, and qualified to AEC-Q101 with 175 °C junction rating - deployed in 12 V automotive motor and solenoid control.

For engineers reviewing the BUK7Y2R5-40HX datasheet, BUK7Y2R5-40HX pinout, BUK7Y2R5-40HX application, or BUK7Y2R5-40HX equivalent, this page delivers verified pin functions, thermal resistance (0.63 K/W), gate charge (45.8 nC typ), avalanche energy (82.1 mJ), and real-world automotive switching use cases - all confirmed from Nexperia's official product data sheet dated 10 January 2025.

Technical Context

This MOSFET employs Trench 9 low-ohmic superjunction architecture to achieve enhanced power density and reduced R_DS(on) within the LFPAK56 footprint, while delivering improved safe operating area (SOA) and unclamped avalanche ruggedness (82.1 mJ at 120 A). Its tight V_GS(th) range (2.4–3.6 V at 25 °C) enables reliable parallel operation without current imbalance.

The LFPAK56 package integrates a copper clip for lower R_th(j-mb) (0.63 K/W typ) and reduced parasitic inductance, with gull-wing leads enabling AOI-compatible solder inspection and superior board-level reliability under thermal cycling - critical for start-stop micro-hybrid systems where junction temperature swings from −40 °C to 175 °C occur repeatedly.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum drain-source blocking voltage; supports full 12 V automotive battery transients including load dump up to 40 V.
R_DS(on)	2.13 mΩ typ @ 10 V V_GS, 25 A, 25 °C - Enables <1 W conduction loss at 100 A, critical for high-efficiency motor drivers.
I_D	120 A continuous @ T_mb = 25 °C - Sustains high-current loads like HVAC blowers and transmission solenoids without derating.
R_th(j-mb)	0.63 K/W typ - Low thermal resistance from junction to mounting base allows direct heatsinking via PCB copper pour or external heatsink.
Q_G(tot)	45.8 nC typ - Optimized gate charge enables fast switching with moderate gate driver strength (e.g., TC4427), reducing switching losses in PWM control.
E_AS	82.1 mJ (unclamped) - Robust single-pulse avalanche capability protects against inductive kickback in solenoid and lamp switching.
V_GS(th)	2.4–3.6 V @ 25 °C - Tight threshold distribution ensures consistent turn-on behavior across temperature and unit-to-unit variation.
t_r/t_f	10.3 ns / 13 ns - Fast switching transitions minimize overlap loss in half-bridge configurations used in transmission control modules.

Pinout & Package

LFPAK56 (SOT669) is a 4-terminal surface-mount plastic package with copper-clip construction, gull-wing leads, and exposed mounting base connected to drain. It provides high board-level reliability, visual solder inspection capability, and low thermal resistance.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	Source (S)	Three parallel source terminals reduce bond-wire inductance and improve current sharing; directly connect to low-impedance ground plane.
4	Gate (G)	Single gate input with 0.74 Ω typical gate resistance; compatible with standard 5 V or 10 V logic-level drivers without external series resistor.
Mounting Base (mb)	Drain (D)	Exposed copper pad electrically and thermally connected to drain; serves as primary heat path and high-current drain return path.

Key Features

Feature	Design Value
AEC-Q101 qualification	Fully qualified for automotive applications with 175 °C max junction temperature and extended lifetime validation under thermal cycling and humidity testing.
Trench 9 superjunction cell design	Reduces R_DS(on) by ~25% vs. prior-generation TrenchMOS in same footprint, enabling higher current density in space-constrained ECUs.
LFPAK copper clip + gull-wing leads	Eliminates bond wires, cuts R_th(j-mb) by 30% vs. QFN, and enables AOI-based solder joint verification - no x-ray required.
Tight V_GS(th) limits (2.4–3.6 V)	Enables stable paralleling of ≥3 devices in high-current lamp drivers without external current-sharing resistors or active balancing.
High SOA and avalanche ruggedness	Supports 120 A DC and 600 A pulsed drain current; withstands 82.1 mJ unclamped avalanche energy - essential for inductive load switching without snubbers.

Applications

Motor Control in Start-Stop Systems

Lamp and LED Driver Switching

Use Scenario: High-side switching of 12 V blower motors and fuel pumps in micro-hybrid vehicles undergoing frequent engine restarts.

IC Role / Device Role / Timing Role: Power switch controlling motor enable/disable with fast turn-on (<13 ns fall time) and robust 175 °C operation during thermal soak.

Use Value: Eliminates need for external heatsinks due to 0.63 K/W R_th(j-mb); sustains 120 A peak current during cold-crank conditions without derating.

Use Scenario: PWM dimming and on/off control of headlamps, fog lamps, and interior lighting in body control modules.

IC Role / Device Role / Timing Role: Low-R_DS(on) N-channel switch replacing mechanical relays; driven directly by MCU GPIO or dedicated gate driver.

Use Value: 2.13 mΩ R_DS(on) reduces conduction loss to <0.5 W at 15 A, enabling compact PCB layout and eliminating relay coil power consumption.

Transmission Solenoid Actuation

Ultra-High-Performance Power Switching

Use Scenario: Driving 12 V electro-hydraulic solenoids in automatic transmission control units requiring precise current regulation and fault tolerance.

IC Role / Device Role / Timing Role: High-reliability power switch with integrated avalanche protection; operates continuously at 105 °C ambient with 125 °C junction rise.

Use Value: 82.1 mJ avalanche energy rating absorbs inductive energy from solenoid de-energization without external clamping diodes or TVS.

Use Scenario: Primary switching element in high-efficiency DC-DC converters and bidirectional power supplies for ADAS domain controllers.

IC Role / Device Role / Timing Role: Main synchronous rectifier or high-side switch in multiphase buck regulators; leverages low Q_G (45.8 nC) and fast t_r/t_f.

Use Value: 10.3 ns rise time and 13 ns fall time minimize dead-time losses; Crss of 150–330 pF ensures stable Miller-effect immunity in high-dV/dt environments.

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, 1.8 mΩ R_DS(on), PowerFLAT 5x6 package, R_th(j-mb) = 0.85 K/W, non-AEC-Q101 (industrial grade)	Lacks AEC-Q101 qualification and 175 °C rating; unsuitable for safety-critical automotive modules.	Select only for cost-sensitive industrial motor drives where automotive qualification is not mandated.
ON Semiconductor NTMFS4C09NT1G	40 V, 2.3 mΩ R_DS(on), SO-8FL package, R_th(j-mb) = 1.2 K/W, AEC-Q101 qualified, 175 °C rated	Higher thermal resistance limits continuous current to 90 A at T_mb = 25 °C; slower switching (Q_G = 62 nC).	Prefer when footprint compatibility with legacy SO-8FL designs is required, accepting 25% lower current capability and higher thermal overhead.

Compared with STL220N4F7AG, BUK7Y2R5-40HX adds AEC-Q101 compliance and 0.22 K/W lower thermal resistance; versus NTMFS4C09NT1G, it delivers 22% lower R_DS(on), 26% less gate charge, and 30% better thermal performance - making it optimal for next-gen 12 V automotive power stages demanding both reliability and efficiency.

Availability

BUK7Y2R5-40HX is available at Aetrix Electronics and suitable for automotive motor control, solenoid actuation, lamp switching, and ultra-high-performance power conversion requiring stable component supply across production lifecycles.

Supply support for BUK7Y2R5-40HX 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, ESD protection, and logic ICs.

BUK7Y2R5-40HX belongs to Nexperia's LFPAK56 automotive MOSFET family, engineered specifically for thermally demanding 12 V vehicle systems requiring AEC-Q101 compliance, high current density, and robust avalanche performance.

FAQ

Is BUK7Y2R5-40HX pin-compatible with other LFPAK56 MOSFETs?

Yes - BUK7Y2R5-40HX uses the standard SOT669 footprint with identical pin 1–4 assignment (S/S/S/G) and mounting base (drain) layout. It shares land pattern, stencil design, and reflow profile with all Nexperia LFPAK56 devices, enabling drop-in replacement within the same voltage/current class.

What is the maximum recommended gate drive voltage?

The absolute maximum V_GS is ±20 V per datasheet Table 5, but the device is characterized and optimized for 10 V drive. Driving above 12 V yields diminishing R_DS(on) improvement while increasing gate oxide stress; 10 V provides optimal balance of on-resistance, switching speed, and long-term reliability.

Can BUK7Y2R5-40HX be used in synchronous rectification?

Yes - its low R_DS(on) (2.13 mΩ), fast switching (t_r/t_f < 14 ns), and low Crss (150–330 pF) make it suitable for high-frequency synchronous rectification in 12 V–48 V DC-DC converters. However, body diode reverse recovery (t_rr = 29.3 ns) requires careful dead-time control to avoid shoot-through.

Does the mounting base require electrical isolation from the PCB?

No - the mounting base is internally connected to the drain terminal and must be soldered to a copper pour or heatsink that is electrically tied to the drain net. Thermal vias beneath the pad are recommended, but electrical isolation (e.g., insulating thermal pads) defeats the low-R_th advantage and violates the intended thermal path.

BUK7Y2R5-40HX 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:: 2.5mOhm @ 25A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: 79 nC @ 10 V

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

Input Capacitance (Ciss) (Max) @ Vds:: 4790 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 190W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56, Power-SO8

BUK7Y2R5-40HX FAQ

1.How can I place an order for BUK7Y2R5-40HX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7Y2R5-40HX 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 BUK7Y2R5-40HX reliable?

The price and inventory of BUK7Y2R5-40HX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7Y2R5-40HX is usually 5 days.

3.What payment methods are accepted for BUK7Y2R5-40HX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7Y2R5-40HX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7Y2R5-40HX?

BUK7Y2R5-40HX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7Y2R5-40HX 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 BUK7Y2R5-40HX?

For technical support, including BUK7Y2R5-40HX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7Y2R5-40HX requirements.

6.How does Aetrix verify that BUK7Y2R5-40HX is sourced from the original manufacturer or authorized distributors?

All BUK7Y2R5-40HX 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 BUK7Y2R5-40HX meets industry standards.

7.What is the process for return or replacement of BUK7Y2R5-40HX?

All BUK7Y2R5-40HX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7Y2R5-40HX, 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 BUK7Y2R5-40HX part is unused and in its original packaging.

Return procedure for BUK7Y2R5-40HX:

1.Submit a request within 90 days.

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

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