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

Nexperia USA Inc. BUK7M6R0-40HX

Name: BUK7M6R0-40HX
Brand: Nexperia USA Inc.
SKU: BUK7M6R0-40HX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7M6R0-40HX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SOT-1210, 8-LFPAK33 (5-Lead)

Datasheet:: BUK7M6R0-40HX.pdf

Description:: MOSFET N-CH 40V 50A LFPAK33

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Product details

Overview

BUK7M6R0-40HX from Nexperia is an AEC-Q101 qualified N-channel standard-level MOSFET in LFPAK33 (SOT1210) package, engineered for 12 V automotive powertrain and body control applications. It delivers 40 V V_DS, 6.0 mΩ R_DS(on) at V_GS = 10 V and T_j = 25 °C, 50 A continuous drain current capability, and repetitive avalanche rating - enabling robust high-current switching in engine management modules and LED headlight drivers.

For engineers reviewing the BUK7M6R0-40HX datasheet, BUK7M6R0-40HX pinout, BUK7M6R0-40HX application, or BUK7M6R0-40HX equivalent, key selection criteria include its 1.91 K/W junction-to-mounting-base thermal resistance, gull-wing lead configuration for AOI compatibility, Trench 9 superjunction architecture for low conduction loss, and validated operation up to 175 °C junction temperature in automotive environments.

Technical Context

This MOSFET employs Trench 9 TrenchMOS technology with a copper clip LFPAK33 package, delivering high power density and low R_DS(on) while maintaining ruggedness under repetitive avalanche stress. Its gate threshold voltage (V_GS(th)) ranges from 1.0 V (min at T_j = 175 °C) to 3.6 V (max at T_j = 25 °C), supporting reliable turn-on across automotive temperature extremes.

The device features a dedicated mounting base (Pin mb) electrically connected to the drain, enabling low-inductance, high-current PCB layout. Its source-drain diode exhibits soft reverse recovery (S = 0.63) and 19 nC recovered charge, reducing EMI in inductive load switching such as solenoid and motor drive circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V maximum drain-source voltage - supports full 12 V automotive battery rail transients including load dump up to ISO 7637-2 Pulse 5a.
R_DS(on)	4.9 mΩ typical at V_GS = 10 V, I_D = 20 A, T_j = 25 °C - enables <1 W conduction loss at 20 A, critical for thermally constrained ECUs.
I_D (cont)	50 A continuous drain current at T_mb = 25 °C - validated in application testing; limited in practice by PCB copper area and thermal interface design.
E_AS	37 mJ non-repetitive avalanche energy - provides single-pulse fault tolerance during inductive switching events without device failure.
R_th(j-mb)	1.91 K/W typical thermal resistance - allows direct thermal coupling to heatsinked PCB ground planes, simplifying thermal management in space-constrained modules.
Q_GD	3.9 nC typical gate-drain charge - ensures fast, controllable switching with minimal Miller-induced shoot-through risk in half-bridge configurations.
V_GS(th)	2.4–3.6 V typical at T_j = 25 °C - compatible with standard 3.3 V/5 V microcontroller GPIOs when driven via gate driver ICs.

Pinout & Package

LFPAK33 (SOT1210) is a surface-mount, copper-clip package with gull-wing leads and an exposed metal mounting base (drain-connected). Its 8-lead structure enables high-current routing and superior thermal performance versus SO-8 or DPAK alternatives.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, S	Source	Three parallel source terminals reduce bond wire inductance and improve current sharing - essential for high di/dt motor control.
4, G	Gate	Single gate terminal with low RG (0.3–2 Ω) - minimizes gate drive power and supports fast 7.7 ns turn-on delay.
mb, D	Mounting Base / Drain	Exposed copper pad electrically tied to drain - serves as primary thermal path and high-current return node; requires soldered PCB thermal pad.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use at 175 °C junction temperature - eliminates need for additional reliability screening in Tier 1 ECU designs.
Trench 9 superjunction architecture	Enables 6.0 mΩ R_DS(on) at 40 V rating - achieves >30% lower conduction loss than planar MOSFETs in same package.
Repetitive avalanche rating	Rated for repeated inductive energy dissipation - supports robust operation in DC-DC converters and solenoid drivers without external snubbers.
Gull-wing lead geometry	Facilitates automated optical inspection (AOI) and improves solder joint reliability - reduces field failures in high-volume automotive manufacturing.
Soft reverse recovery diode	S = 0.63 at dI_S/dt = −100 A/µs - suppresses voltage overshoot and EMI during freewheeling in motor H-bridges and LED constant-current regulators.

Applications

Engine Control Unit (ECU) Fuel Injector Driver

Automotive LED Headlight Matrix Switch

Use Scenario: High-speed, high-current switching of 12 V fuel injectors in gasoline direct injection systems.

IC Role / Device Role / Timing Role: Low-side switch controlling injector coil current with precise 1–5 ms pulse width modulation.

Use Value: 6.0 mΩ R_DS(on) limits power loss to <0.6 W at 12 A peak, enabling compact thermal design; repetitive avalanche rating absorbs coil flyback energy without clamping diodes.

Use Scenario: Individual pixel-level on/off control in adaptive LED headlight arrays requiring PWM dimming up to 2 kHz.

IC Role / Device Role / Timing Role: High-side or low-side current switch per LED string, synchronized to camera-based road scene analysis.

Use Value: Fast 6.4 ns rise time and 6.6 ns fall time support clean PWM edges; gull-wing leads ensure AOI-compatible assembly for high-reliability lighting modules.

12 V DC-DC Converter Primary Switch

Electric Power Steering (EPS) Motor Phase Leg

Use Scenario: Primary-side synchronous rectifier switch in 12 V to 5 V/3.3 V buck converters powering ADAS sensors and infotainment SoCs.

IC Role / Device Role / Timing Role: High-frequency (500 kHz–2 MHz) power switch operating with tight duty cycle control and low gate charge (20 nC total).

Use Value: 3.9 nC Q_GD minimizes Miller plateau duration, improving efficiency at high switching frequencies; 1.91 K/W R_th(j-mb) enables direct thermal coupling to converter PCB ground plane.

Use Scenario: Half-bridge leg switch in 12 V EPS motor drivers handling bidirectional 30–50 A phase currents during steering assist.

IC Role / Device Role / Timing Role: Low-side MOSFET in three-phase inverter, commutating motor current with <15 ns turn-off delay and soft diode recovery.

Use Value: 19 nC Q_r and S = 0.63 reduce voltage spikes during freewheeling, lowering EMI filter requirements; AEC-Q101 qualification ensures functional safety compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 40 V automotive MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4F7AG	Higher R_DS(on) (7.5 mΩ typ), same LFPAK56 package but larger footprint; no repetitive avalanche rating.	Less suitable for high-current, high-reliability motor drives where avalanche ruggedness is required.	Prefer BUK7M6R0-40HX when repetitive avalanche capability and lower conduction loss are critical.
ON Semiconductor NTMFS5C675NL	Lower R_DS(on) (5.2 mΩ typ) but only AEC-Q101 qualified to 150 °C; uses PowerTrench® not Trench 9.	May require derating in high-ambient under-hood applications exceeding 150 °C junction temperature.	Choose BUK7M6R0-40HX for full 175 °C operation in powertrain modules near exhaust manifolds.

Compared with STL220N4F7AG and NTMFS5C675NL, BUK7M6R0-40HX uniquely combines 175 °C AEC-Q101 qualification, repetitive avalanche rating, and 4.9 mΩ R_DS(on) in the compact LFPAK33 footprint - making it optimal for thermally demanding, safety-critical automotive switches where reliability and power density are jointly constrained.

Availability

BUK7M6R0-40HX is available at Aetrix Electronics and suitable for engine control units, adaptive LED lighting systems, and electric power steering modules requiring stable component supply across extended automotive production lifecycles.

Supply support for BUK7M6R0-40HX 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 logic, discrete, and MOSFET solutions, with deep expertise in automotive-grade components and advanced packaging technologies.

The LFPAK MOSFET product line was developed specifically to replace legacy TO-220 and DPAK packages in automotive power switching, emphasizing thermal performance, manufacturability, and AEC-Q101 compliance from wafer to system integration.

FAQ

What is the maximum continuous drain current for BUK7M6R0-40HX at 100 °C mounting base temperature?

At T_mb = 100 °C, the continuous drain current is rated at 50 A per Figure 2 of the datasheet. This value is validated through application testing but remains dependent on PCB copper area, thermal interface material, and ambient airflow - actual current must be verified using thermal simulation or measurement under real board conditions.

Does BUK7M6R0-40HX require a gate resistor for safe operation in automotive PWM applications?

Yes - a series gate resistor (typically 5–10 Ω) is recommended to control dV/dt and prevent oscillation, especially given its low gate resistance (0.3–2 Ω) and 20 nC total gate charge. The resistor also dampens ringing caused by PCB trace inductance interacting with Q_GD during switching transitions.

How is the mounting base (mb) terminal electrically connected internally?

The mounting base is directly bonded to the MOSFET's drain region and forms the primary drain connection. It is not isolated - therefore, the PCB thermal pad must be routed to the drain net and cannot serve as a floating heatsink. This configuration enables low-inductance, high-current paths critical for motor and solenoid drive stability.

Can BUK7M6R0-40HX be used in synchronous rectification topologies?

No - it is a standard-level (not logic-level) MOSFET with V_GS(th) starting at 2.4 V and requiring ≥10 V for full enhancement. For synchronous rectification in 12 V systems, a logic-level MOSFET with V_GS(th) ≤ 2.0 V and optimized for low V_GS drive is required; this part is intended for active switching with dedicated gate drivers.

BUK7M6R0-40HX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SOT-1210, 8-LFPAK33 (5-Lead)

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:: 50A (Tc)

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

Rds On (Max) @ Id, Vgs:: 6mOhm @ 20A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: 28 nC @ 10 V

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

Input Capacitance (Ciss) (Max) @ Vds:: 1875 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 70W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK33

BUK7M6R0-40HX FAQ

1.How can I place an order for BUK7M6R0-40HX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7M6R0-40HX 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 BUK7M6R0-40HX reliable?

The price and inventory of BUK7M6R0-40HX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7M6R0-40HX is usually 5 days.

3.What payment methods are accepted for BUK7M6R0-40HX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7M6R0-40HX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7M6R0-40HX?

BUK7M6R0-40HX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7M6R0-40HX 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 BUK7M6R0-40HX?

For technical support, including BUK7M6R0-40HX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7M6R0-40HX requirements.

6.How does Aetrix verify that BUK7M6R0-40HX is sourced from the original manufacturer or authorized distributors?

All BUK7M6R0-40HX 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 BUK7M6R0-40HX meets industry standards.

7.What is the process for return or replacement of BUK7M6R0-40HX?

All BUK7M6R0-40HX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7M6R0-40HX, 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 BUK7M6R0-40HX part is unused and in its original packaging.

Return procedure for BUK7M6R0-40HX:

1.Submit a request within 90 days.

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

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