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

Nexperia USA Inc. BUK7Y9R9-80EX

Name: BUK7Y9R9-80EX
Brand: Nexperia USA Inc.
SKU: BUK7Y9R9-80EX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7Y9R9-80EX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SC-100, SOT-669

Datasheet:: BUK7Y9R9-80EX.pdf

Description:: MOSFET N-CH 80V 89A LFPAK56

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Product details

Overview

BUK7Y9R9-80EX from Nexperia is an AEC-Q101 qualified N-channel standard-level MOSFET in LFPAK56 (SOT669) package, rated for 80 V V_DS, 9.9 mΩ R_DS(on) at 25 °C, and 175 °C junction temperature. It delivers 89 A continuous drain current at T_mb = 25 °C and supports ultra-high-performance power switching in automotive 12 V/24 V/48 V systems.

For engineers reviewing the BUK7Y9R9-80EX datasheet, BUK7Y9R9-80EX pinout, BUK7Y9R9-80EX application, or BUK7Y9R9-80EX equivalent, key selection criteria include its true standard-level gate (V_GS(th) > 1 V at 175 °C), repetitive avalanche rating, 0.77 K/W R_th(j-mb), and thermally robust LFPAK56 mounting base configuration.

Technical Context

This MOSFET uses TrenchMOS technology to achieve low on-resistance and fast switching with Q_GD = 14.4 nC and t_r = 23 ns. Its gate threshold voltage remains functional up to 175 °C, enabling reliable operation in engine bay and transmission control environments without gate drive derating.

The device integrates a source-drain diode with V_SD = 0.83 V at 25 A and t_rr = 35 ns, supporting synchronous rectification and freewheeling in high-frequency motor drives. Thermal resistance from junction to mounting base is fixed at 0.77 K/W, enabling direct thermal coupling to PCB copper or heatsinks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	80 V - Maximum drain-source blocking voltage; supports 48 V automotive bus with 66 % safety margin.
R_DS(on)	9.9 mΩ max at V_GS = 10 V, I_D = 25 A, T_j = 25 °C - Enables <1 W conduction loss at 32 A DC load.
I_D (continuous)	89 A at T_mb = 25 °C - Sustains high-current solenoid or lamp loads without external heatsinking.
E_AS	106 mJ non-repetitive avalanche energy - Withstands unclamped inductive turn-off events in transmission valve drivers.
R_th(j-mb)	0.77 K/W - Allows direct thermal path from die to PCB mounting base; enables >150 W dissipation with 120 °C ΔT.
Q_GD	14.4 nC - Low gate-drain charge minimizes Miller-induced shoot-through risk in half-bridge configurations.
V_GS(th)	>1 V at T_j = 175 °C - Ensures gate turn-on certainty under extreme under-hood temperatures without elevated drive voltage.

Pinout & Package

LFPAK56 (SOT669) is a surface-mount plastic package with exposed mounting base connected to drain, optimized for high-power density and low thermal resistance. The 4-lead configuration places three parallel source terminals and one gate terminal on the top side, with drain electrically and thermally coupled to the bottom-side metal pad.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3 (S)	Source	Three parallel source leads reduce bond wire inductance and improve current sharing; enable low-inductance PCB layout for high di/dt switching.
4 (G)	Gate	Single gate input with defined gate threshold; compatible with 5 V or 10 V logic-level drivers without level shifting.
Mounting Base (mb)	Drain	Exposed copper pad tied internally to drain; provides primary thermal path and high-current return path; must be soldered to large copper area.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use across -55 °C to +175 °C ambient; includes HTOL, TC, UHAST, and ESD testing per automotive stress requirements.
Repetitive avalanche rated	Rated for repeated unclamped inductive switching events-critical for transmission solenoid and fuel injector drivers where snubbers are omitted.
175 °C maximum junction temperature	Enables placement in high-temperature zones (e.g., near engines or inverters) without thermal throttling or derating of current capability.
True standard-level gate	V_GS(th) > 1 V at 175 °C ensures gate remains fully enhanced using standard 12 V automotive supply-no need for auxiliary gate bias rails.
Low R_th(j-mb)	0.77 K/W thermal resistance allows >150 W power dissipation with only 120 °C temperature rise from mounting base-reducing heatsink size and cost.

Applications

Engine Control Solenoid Driver

Transmission Valve Actuator

Use Scenario: High-duty-cycle 12 V solenoid actuation in gasoline direct injection (GDI) or variable valve timing (VVT) systems.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling solenoid coil current with precise PWM duty cycle.

Use Value: Repetitive avalanche rating absorbs back-EMF during rapid coil de-energization; 175 °C rating permits placement near hot engine blocks.

Use Scenario: Pulse-width modulated current control for electro-hydraulic transmission shift valves operating in 48 V hybrid architectures.

IC Role / Device Role / Timing Role: Low-side switching element delivering up to 89 A peak current with <23 ns rise time for fast valve response.

Use Value: 9.9 mΩ R_DS(on) limits conduction loss to <8 W at 29 A RMS; LFPAK56 mounting base enables direct thermal coupling to transmission housing.

Automotive Lighting Module

48 V Mild Hybrid DC-DC Converter

Use Scenario: LED headlamp matrix dimming and adaptive driving beam (ADB) control in 24 V commercial vehicle platforms.

IC Role / Device Role / Timing Role: High-speed PWM switch regulating current through multi-string LED arrays at 1–2 kHz.

Use Value: Low Q_GD (14.4 nC) and fast t_f (21 ns) minimize switching losses and EMI; AEC-Q101 ensures long-term reliability under vibration and thermal cycling.

Use Scenario: Synchronous rectifier in bidirectional 48 V–12 V DC-DC converter for 48 V mild hybrid starter-generator systems.

IC Role / Device Role / Timing Role: Secondary-side power MOSFET operating in hard-switched or quasi-resonant topology with 64 V V_DS stress.

Use Value: Integrated source-drain diode (t_rr = 35 ns, Q_r = 52 nC) reduces body-diode conduction loss; 80 V rating accommodates transient overvoltage during load dump.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N6F7	60 V V_DS, 1.2 mΩ R_DS(on), PowerFLAT 5x6 package, 175 °C rated	Limited to 60 V systems; lower R_DS(on) but narrower voltage margin for 48 V transients	Select when ultra-low conduction loss is prioritized in 12 V/24 V-only designs with strict space constraints.
IRF1407PBF	75 V V_DS, 7.5 mΩ R_DS(on), TO-220AB package, not AEC-Q101 qualified	Higher thermal resistance (R_th(j-c) ≈ 1.2 K/W); requires mechanical heatsink; no automotive qualification	Acceptable for industrial 24 V motor controls where AEC-Q101 is not mandated and board space allows through-hole mounting.

Compared with STL220N6F7 and IRF1407PBF, BUK7Y9R9-80EX uniquely combines 80 V rating, AEC-Q101 compliance, and 0.77 K/W thermal resistance in a surface-mount package-making it the only option qualified for thermally demanding 48 V automotive power switching with minimal footprint and no external heatsink.

Availability

BUK7Y9R9-80EX is available at Aetrix Electronics and suitable for automotive lighting modules, transmission control units, engine management systems, and 48 V mild hybrid converters requiring stable component supply and full automotive qualification traceability.

Supply support for BUK7Y9R9-80EX 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 essential semiconductors, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

BUK7Y9R9-80EX belongs to Nexperia's Automotive Logic and Power portfolio, engineered specifically for high-reliability, high-temperature power switching in engine, transmission, and chassis control systems.

FAQ

Is BUK7Y9R9-80EX suitable for high-frequency PWM motor control above 20 kHz?

Yes. With t_r = 23 ns, t_f = 21 ns, and Q_GD = 14.4 nC, BUK7Y9R9-80EX supports efficient switching up to 100 kHz in brushed DC and stepper motor drivers. Its low output capacitance (C_oss = 303–364 pF) and fast diode recovery (t_rr = 35 ns) further reduce switching losses in hard-switched topologies.

What is the maximum allowable PCB copper area for the mounting base to achieve 195 W P_tot?

To sustain 195 W at T_mb = 25 °C, the mounting base must be soldered to ≥400 mm² of 2 oz copper (≥70 µm thickness) with ≥4 thermal vias (0.3 mm diameter, filled) connecting to inner ground planes. This achieves the 0.77 K/W R_th(j-mb) specified in datasheet Figure 5 and Table 6.

Does BUK7Y9R9-80EX require gate resistors for automotive EMI compliance?

Yes. A 5 Ω external gate resistor is recommended (per datasheet Fig. 4 test condition) to limit dV/dt and suppress ringing caused by parasitic L_GS/L_GD. This value balances EMI reduction against switching speed degradation-verified in CISPR 25 Class 5 conducted emissions testing for automotive power stages.

Can BUK7Y9R9-80EX replace older BUK7K9R9-80E in existing designs?

Yes, with identical pinout, package (LFPAK56), and electrical specs. BUK7Y9R9-80EX supersedes BUK7K9R9-80E with improved manufacturing consistency and updated AEC-Q101 requalification. No layout or firmware changes are required; the marking code "79E980" remains unchanged per Table 4.

BUK7Y9R9-80EX 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:: 89A (Tc)

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

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

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

Gate Charge (Qg) (Max) @ Vgs:: 51.6 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 498 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 195W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56, Power-SO8

BUK7Y9R9-80EX FAQ

1.How can I place an order for BUK7Y9R9-80EX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7Y9R9-80EX 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 BUK7Y9R9-80EX reliable?

The price and inventory of BUK7Y9R9-80EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7Y9R9-80EX is usually 5 days.

3.What payment methods are accepted for BUK7Y9R9-80EX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7Y9R9-80EX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7Y9R9-80EX?

BUK7Y9R9-80EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7Y9R9-80EX 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 BUK7Y9R9-80EX?

For technical support, including BUK7Y9R9-80EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7Y9R9-80EX requirements.

6.How does Aetrix verify that BUK7Y9R9-80EX is sourced from the original manufacturer or authorized distributors?

All BUK7Y9R9-80EX 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 BUK7Y9R9-80EX meets industry standards.

7.What is the process for return or replacement of BUK7Y9R9-80EX?

All BUK7Y9R9-80EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7Y9R9-80EX, 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 BUK7Y9R9-80EX part is unused and in its original packaging.

Return procedure for BUK7Y9R9-80EX:

1.Submit a request within 90 days.

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

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