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

Nexperia USA Inc. BUK9Y25-80E,115

Name: BUK9Y25-80E,115
Brand: Nexperia USA Inc.
SKU: BUK9Y25-80E,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9Y25-80E,115

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: SC-100, SOT-669

Datasheet:: BUK9Y25-80E,115.pdf

Description:: MOSFET N-CH 80V 37A LFPAK56

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Product details

Overview

BUK9Y25-80E from Nexperia is an AEC-Q101-qualified N-channel logic-level MOSFET in LFPAK56 (SOT669) package, rated for 80 V V_DS, 27 mΩ R_DS(on) at V_GS = 5 V and T_j = 25 °C, with 175 °C maximum junction temperature and repetitive avalanche capability - deployed in automotive transmission control and high-current solenoid switching.

For engineers reviewing the BUK9Y25-80E datasheet, BUK9Y25-80E pinout, BUK9Y25-80E application, or BUK9Y25-80E equivalent, this page delivers verified electrical specs, thermal performance data, gate drive behavior at elevated temperature, and real-world automotive use context - all grounded in Nexperia's official 2013 product data sheet.

Technical Context

This MOSFET uses TrenchMOS technology to achieve low on-resistance while maintaining robust switching dynamics: Q_GD = 5.8 nC and C_iss = 2.7 nF enable fast, controlled turn-on/turn-off in thermally constrained 12–48 V automotive subsystems. Its true logic-level gate (V_GS(th) ≥ 0.5 V at 175 °C) ensures reliable enhancement-mode operation with standard 5 V microcontroller outputs.

The device integrates a monolithic source-drain diode (V_SD = 0.81 V at I_S = 10 A, T_j = 25 °C) and supports unclamped inductive switching with E_AS = 45.4 mJ - critical for motor and solenoid load management where freewheeling energy must be safely absorbed without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	80 V - Maximum drain-source blocking voltage compatible with 48 V automotive architectures and transient overvoltage margins.
R_DS(on)	22.2–27 mΩ @ V_GS = 5 V, T_j = 25 °C - Enables <1 W conduction loss at 37 A continuous current, reducing heatsink requirements.
I_D	37 A @ T_mb = 25 °C - Sustained current capability suitable for high-power lamp and motor drivers without forced cooling.
R_th(j-mb)	1.58 K/W - Low junction-to-mounting-base thermal resistance enables efficient PCB copper pour heat spreading in space-constrained modules.
Q_GD	5.8 nC - Gate-drain charge directly governs Miller plateau duration; enables predictable 23.9 ns t_d(off) with 5 Ω gate resistor.
E_AS	45.4 mJ - Single-pulse avalanche energy rating allows safe operation during inductive load turn-off without snubber networks.
V_GS(th)	≥0.5 V @ T_j = 175 °C - Ensures guaranteed turn-on margin under worst-case hot-cranking conditions in engine bay environments.

Pinout & Package

LFPAK56 (SOT669) is a 4-lead surface-mount power package with exposed mounting base connected to drain, optimized for high-current density and low-inductance PCB layout. Thermal performance relies on soldered mounting base contact to copper thermal pad.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	Source (S)	Three parallel source terminals reduce bond wire inductance and improve current sharing in high-di/dt switching.
4	Gate (G)	Single gate input with 17.1 nC total gate charge; requires low-impedance drive to minimize switching losses.
Mounting base	Drain (D)	Exposed copper pad electrically and thermally connected to drain; must be soldered to PCB thermal plane for rated P_tot = 95 W.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability across -55 °C to +175 °C ambient, including temperature cycling and HTRB testing.
Repetitive avalanche rating	Rated for repeated unclamped inductive switching events without degradation - eliminates need for external clamping diodes in solenoid drivers.
True logic-level gate	V_GS(th) remains ≥0.5 V up to 175 °C junction temperature, ensuring compatibility with 3.3 V/5 V MCU GPIOs even under hood-hot conditions.
Thermal robustness	175 °C max junction temperature and 1.58 K/W R_th(j-mb) support operation in sealed transmission control units with minimal airflow.
Low R_DS(on) drift	R_DS(on) increases only 3× from 22.2 mΩ (25 °C) to 67.8 mΩ (175 °C), preserving efficiency in high-temperature duty cycles.

Applications

Transmission Control Module

Engine Start-Stop Solenoid Driver

Use Scenario: High-reliability switching of hydraulic pressure control valves inside automatic transmission valve bodies.

IC Role / Device Role / Timing Role: Power switch controlling 12–24 V solenoid coils with 100 ms–2 s dwell times and frequent PWM modulation.

Use Value: Repetitive avalanche rating absorbs back-EMF without snubbers; 175 °C rating sustains operation near hot gearbox oil.

Use Scenario: Driving starter motor engagement solenoids in 12 V start-stop systems subject to cranking transients and thermal soak.

IC Role / Device Role / Timing Role: High-current (30+ A) DC switch activated by BCM microcontroller with 5 V logic output.

Use Value: True logic-level gate ensures turn-on during low-battery cranking (down to 6 V system); 150 A peak current handles inrush.

Electric Power Steering Motor Phase Switch

LED Headlamp High-Beam Dimming

Use Scenario: Half-bridge phase leg in 24 V EPS motor controllers requiring fast, low-loss switching and fault tolerance.

IC Role / Device Role / Timing Role: Low-side switching element handling 30 A continuous phase current with 20 kHz PWM commutation.

Use Value: Low Q_GD/C_iss ratio minimizes shoot-through risk; integrated body diode enables synchronous rectification.

Use Scenario: PWM dimming of high-intensity LED arrays in adaptive front lighting systems (AFS) with thermal derating constraints.

IC Role / Device Role / Timing Role: High-efficiency series pass switch modulating 48 V LED strings at 1–5 kHz with <1% duty cycle resolution.

Use Value: 27 mΩ R_DS(on) limits conduction loss to <0.5 W at 4 A; 1.58 K/W thermal resistance maintains LED color stability.

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
STL220N6F7	60 V V_DS, 2.2 mΩ R_DS(on) @ 10 V, LFPAK56 package, AEC-Q101 qualified	Limited to 60 V systems; superior R_DS(on) but requires 10 V gate drive - not logic-level compatible	Select when higher voltage margin is unnecessary and gate drive can supply ≥8 V; avoid in 5 V MCU-only designs.
IRF100P217	100 V V_DS, 1.7 mΩ R_DS(on) @ 10 V, TO-220FP package, AEC-Q101 qualified	Higher voltage rating but larger through-hole package; no logic-level gate (V_GS(th) = 2.0–4.0 V)	Choose for legacy board designs needing 100 V headroom and manual assembly; not suitable for dense SMT layouts or 3.3 V logic.

Compared with STL220N6F7 and IRF100P217, BUK9Y25-80E uniquely balances 80 V rating, true 5 V logic-level operation, and LFPAK56 thermal performance - making it optimal for new SMT-based automotive modules where gate drive simplicity and thermal density are prioritized over ultra-low R_DS(on).

Availability

BUK9Y25-80E is available at Aetrix Electronics and suitable for automotive transmission control, engine start-stop solenoid actuation, and electric power steering motor phase switching requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BUK9Y25-80E 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-qualified MOSFETs, ESD protection, and logic ICs.

BUK9Y25-80E belongs to Nexperia's LFPAK automotive MOSFET portfolio, engineered specifically for thermally demanding, safety-critical vehicle subsystems where AEC-Q101 compliance, avalanche ruggedness, and logic-level gate drive are mandatory.

FAQ

Is BUK9Y25-80E suitable for 48 V mild-hybrid automotive systems?

Yes. Its 80 V V_DS rating provides 2× margin over nominal 48 V bus voltage and accommodates load-dump transients up to 65 V per ISO 7637-2. The 175 °C junction rating and AEC-Q101 qualification confirm suitability for under-hood placement in 48 V architectures.

What is the maximum continuous drain current at 100 °C mounting base temperature?

Per Figure 1 in the datasheet, the continuous drain current is 26.5 A at T_mb = 100 °C and V_GS = 5 V. This reflects thermal derating due to reduced heat dissipation capacity at elevated PCB temperatures - critical for sealed module designs.

Does BUK9Y25-80E require a gate resistor for driving with a 5 V microcontroller?

Yes. A gate resistor (typically 5–10 Ω) is required to control dV/dt and prevent oscillation during switching. With Q_G(tot) = 17.1 nC and typical MCU GPIO drive strength (~20 mA), a 5 Ω resistor yields ~10 ns rise time - matching the specified t_r = 17.2 ns.

Can the mounting base be left unconnected for low-power evaluation?

No. The mounting base is electrically connected to the drain terminal and serves as the primary thermal path. Leaving it unconnected violates Absolute Maximum Ratings, risks thermal runaway at >1 W dissipation, and invalidates the 95 W P_tot specification - full soldering to a thermal pad is mandatory for rated operation.

BUK9Y25-80E,115 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):: 80 V

Current - Continuous Drain (Id) @ 25°C:: 37A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V, 10V

Rds On (Max) @ Id, Vgs:: 27mOhm @ 10A, 5V

Vgs(th) (Max) @ Id:: 2.1V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 17.1 nC @ 5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 2703 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 95W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56, Power-SO8

BUK9Y25-80E,115 FAQ

1.How can I place an order for BUK9Y25-80E,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9Y25-80E,115 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 BUK9Y25-80E,115 reliable?

The price and inventory of BUK9Y25-80E,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9Y25-80E,115 is usually 5 days.

3.What payment methods are accepted for BUK9Y25-80E,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9Y25-80E,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9Y25-80E,115?

BUK9Y25-80E,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9Y25-80E,115 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 BUK9Y25-80E,115?

For technical support, including BUK9Y25-80E,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9Y25-80E,115 requirements.

6.How does Aetrix verify that BUK9Y25-80E,115 is sourced from the original manufacturer or authorized distributors?

All BUK9Y25-80E,115 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 BUK9Y25-80E,115 meets industry standards.

7.What is the process for return or replacement of BUK9Y25-80E,115?

All BUK9Y25-80E,115 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9Y25-80E,115, 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 BUK9Y25-80E,115 part is unused and in its original packaging.

Return procedure for BUK9Y25-80E,115:

1.Submit a request within 90 days.

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

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