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

Nexperia USA Inc. BUK7J2R4-80MX

Name: BUK7J2R4-80MX
Brand: Nexperia USA Inc.
SKU: BUK7J2R4-80MX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7J2R4-80MX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SOT-1023, 4-LFPAK

Datasheet:: BUK7J2R4-80MX.pdf

Description:: BUK7J2R4-80M/SOT1023/LFPAK56E

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Product details

Overview

BUK7J2R4-80MX from Nexperia is an AEC-Q101 qualified N-channel MOSFET using Trench 14 split-gate technology in LFPAK56E (SOT1023) package, delivering 2.4 mΩ R_DS(on) at V_GS = 10 V and T_j = 25 °C, 80 V V_DS, and 231 A continuous drain current at T_mb = 25 °C - deployed in high-current automotive power switching nodes such as 48 V battery disconnect and motor control.

For engineers reviewing the BUK7J2R4-80MX datasheet, BUK7J2R4-80MX pinout, BUK7J2R4-80MX application, or BUK7J2R4-80MX equivalent, this page provides verified technical context, validated pin functions, real-world automotive use cases, thermal performance data, and confirmed alternative parts with documented functional trade-offs.

Technical Context

This MOSFET employs Trench 14 low-ohmic split-gate architecture to achieve ultra-low on-resistance while maintaining robust avalanche ruggedness (383 mJ E_AS) and fast switching (t_r = 18 ns, t_f = 29 ns). Its gate threshold voltage ranges from 2.0 V to 4.6 V across -55 °C to 175 °C, enabling stable turn-on under wide thermal conditions.

The LFPAK56E package integrates a copper clip for reduced R_th(j-mb) (0.45 K/W typ), lower parasitic inductance, and enhanced board-level reliability via gull-wing leads - distinct from QFN packages by supporting AOI inspection and eliminating x-ray dependency.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	80 V maximum drain-source voltage - supports 48 V automotive systems with 67 % derating margin against transients.
R_DS(on)	2.4 mΩ max at V_GS = 10 V, I_D = 25 A, T_j = 25 °C - enables <1.5 W conduction loss at 50 A, critical for thermally constrained modules.
I_D (cont)	231 A at T_mb = 25 °C - delivers high current density in compact LFPAK56E footprint without external heatsink.
Q_G(tot)	127 nC max - balances switching speed and gate drive power; enables <100 ns total switching time with 5 Ω external gate resistor.
R_th(j-mb)	0.51 K/W max - allows >200 W power dissipation before reaching 175 °C junction limit when mounted on copper plane.
E_AS	383 mJ non-repetitive avalanche energy - sustains unclamped inductive turn-off events in solenoid or motor phase-leg applications.
T_j range	-55 °C to +175 °C - certified for under-hood environments including engine bay and battery management units.

Pinout & Package

LFPAK56E (SOT1023) is a 4-lead surface-mount package with gull-wing terminations and integrated copper clip. Mounting base (pin 4) 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 resistance and improve current sharing; enable low-inductance Kelvin source sensing.
4	Gate (G)	Single gate input with 0.8 Ω typical gate resistance - optimized for standard 10 V logic-level drive without gate driver IC.
Mounting Base	Drain (D)	Exposed copper drain pad soldered directly to PCB thermal plane; provides dominant thermal path (R_th(j-mb) = 0.45 K/W).

Key Features

Feature	Design Value
AEC-Q101 qualification	Fully qualified for automotive use with 175 °C operation - eliminates need for additional qualification testing in Tier-1 designs.
Trench 14 split-gate cell	Reduces R_DS(on) by 22 % vs prior generation at same die size - increases power density without increasing footprint or cost.
LFPAK copper clip	Lowers R_DS(on) and package inductance by 35 % vs wire-bonded SO8 - improves EMI behavior and reduces voltage overshoot during turn-off.
Gull-wing leads	Enables automated optical inspection (AOI) of solder joints - removes requirement for x-ray equipment in production line quality control.
Thermal robustness	R_th(j-mb) = 0.45 K/W enables 294 W P_tot at T_mb = 25 °C - supports single-device replacement of dual-MOSFET paralleled solutions.

Applications

12 V Starter Motor Control

48 V Battery Disconnect Switch

Use Scenario: High-pulse current switching for stop-start system starter engagement, handling 923 A peak drain current pulses.

IC Role / Device Role / Timing Role: Main power switch in high-side configuration; operates in linear mode during cranking ramp-up.

Use Value: 383 mJ avalanche energy rating absorbs inductive kickback without snubber circuitry; 175 °C rating ensures reliability near engine block.

Use Scenario: Isolation of 48 V traction battery from DC-DC converter during fault conditions per ISO 26262 ASIL-B requirements.

IC Role / Device Role / Timing Role: Single-pole, high-current disconnect switch with fast turn-off (<100 ns) to limit fault propagation.

Use Value: 2.4 mΩ R_DS(on) limits voltage drop to <120 mV at 50 A - preserves bus voltage stability during active load dump events.

24 V Commercial Vehicle Lighting

Electric Power Steering (EPS) Phase Leg

Use Scenario: PWM dimming and short-circuit protection for LED headlamp arrays in heavy-duty trucks.

IC Role / Device Role / Timing Role: Low-side switch controlling up to 231 A continuous LED string current with 10 kHz PWM.

Use Value: Fast 29 ns fall time minimizes switching losses at high frequency; gull-wing leads ensure AOI-compatible solder joint integrity over 10,000 thermal cycles.

Use Scenario: Half-bridge upper/lower switch in 3-phase EPS motor inverter, operating at 20 kHz switching frequency.

IC Role / Device Role / Timing Role: High-efficiency power stage transistor with low Q_GD/Q_G ratio (0.19 typ) for reduced Miller-induced shoot-through risk.

Use Value: 16.5 nC Q_GD enables clean gate drive waveform with minimal external gate resistor; 0.45 K/W R_th(j-mb) maintains T_j < 150 °C at full torque load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N6F7	60 V V_DS, 1.8 mΩ R_DS(on), PowerFLAT 5x6 package, R_th(j-mb) = 0.65 K/W	Limited to 48 V systems with lower transient margin; higher thermal resistance requires larger PCB copper area.	Select when lower R_DS(on) is prioritized over voltage rating and thermal performance is managed via layout.
IRL1404ZPBF	40 V V_DS, 3.2 mΩ R_DS(on), TO-220AB package, no AEC-Q101 certification	Not qualified for automotive use; unsuitable for under-hood deployment due to 175 °C rating gap and mechanical reliability concerns.	Only consider for non-automotive industrial prototypes where qualification is not required and thermal design accommodates higher R_DS(on).

Compared with STL220N6F7, BUK7J2R4-80MX offers 20 V higher voltage margin and 31 % lower thermal resistance - critical for sustained 48 V battery fault clearing. Against IRL1404ZPBF, it provides full AEC-Q101 compliance, 175 °C operation, and LFPAK56E's superior board-level reliability - eliminating field failure risks in production vehicles.

Availability

BUK7J2R4-80MX is available at Aetrix Electronics and suitable for 48 V battery management, electric power steering, and automotive lighting systems requiring stable component supply across multi-year vehicle production cycles.

Supply support for BUK7J2R4-80MX 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 essential efficiency-enhancing components, with leadership in discrete devices, logic ICs, and MOSFETs for automotive and industrial markets.

BUK7J2R4-80MX belongs to Nexperia's Automotive Logic Level MOSFET product line, engineered specifically for high-current, high-reliability automotive power switching applications demanding AEC-Q101 compliance and extended temperature operation.

FAQ

Is BUK7J2R4-80MX compatible with standard 10 V gate drivers?

Yes. With a gate threshold voltage range of 2.0 V to 4.6 V and guaranteed turn-on at V_GS ≥ 4.5 V, BUK7J2R4-80MX interfaces directly with industry-standard 10 V logic-level gate drivers such as TI UCC27531 or Infineon 1EDN7512B without level-shifting. Its 0.8 Ω typical gate resistance further simplifies drive design.

What is the maximum safe operating temperature for continuous use?

The device is rated for continuous operation up to 175 °C junction temperature, validated per AEC-Q101. At mounting base temperature of 100 °C, it supports 163 A continuous drain current (per Fig. 2), and its R_DS(on) remains ≤ 5.5 mΩ even at T_j = 175 °C - ensuring predictable conduction loss in thermally aggressive locations like engine compartments.

Does BUK7J2R4-80MX require a gate resistor for stability?

A 5 Ω external gate resistor is recommended per the datasheet's switching characterization (Fig. 13–14) to damp ringing and control dV/dt during turn-off. This value balances switching speed (t_f = 29 ns) and EMI suppression, especially critical in motor control and battery disconnect applications where voltage overshoot must stay below 80 V.

Can the mounting base be used as the primary drain connection in PCB layout?

Yes. The mounting base is internally connected to the drain and designed as the primary electrical and thermal interface. It must be soldered to a dedicated PCB copper pour with ≥ 4-layer stackup and thermal vias per Nexperia TN00008 guidelines. Using it as the sole drain connection eliminates bond wire inductance and enables optimal R_th(j-mb) = 0.45 K/W performance.

BUK7J2R4-80MX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SOT-1023, 4-LFPAK

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:: 231A (Ta)

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

Rds On (Max) @ Id, Vgs:: 2.4mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 4V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 127 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 6700 pF @ 64 V

FET Feature:: -

Power Dissipation (Max):: 294W (Ta)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56, Power-SO8

BUK7J2R4-80MX FAQ

1.How can I place an order for BUK7J2R4-80MX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7J2R4-80MX 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 BUK7J2R4-80MX reliable?

The price and inventory of BUK7J2R4-80MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7J2R4-80MX is usually 5 days.

3.What payment methods are accepted for BUK7J2R4-80MX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7J2R4-80MX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7J2R4-80MX?

BUK7J2R4-80MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7J2R4-80MX 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 BUK7J2R4-80MX?

For technical support, including BUK7J2R4-80MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7J2R4-80MX requirements.

6.How does Aetrix verify that BUK7J2R4-80MX is sourced from the original manufacturer or authorized distributors?

All BUK7J2R4-80MX 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 BUK7J2R4-80MX meets industry standards.

7.What is the process for return or replacement of BUK7J2R4-80MX?

All BUK7J2R4-80MX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7J2R4-80MX, 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 BUK7J2R4-80MX part is unused and in its original packaging.

Return procedure for BUK7J2R4-80MX:

1.Submit a request within 90 days.

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

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