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

Nexperia USA Inc. BUK9M5R2-30EX

Name: BUK9M5R2-30EX
Brand: Nexperia USA Inc.
SKU: BUK9M5R2-30EX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9M5R2-30EX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

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

Datasheet:: BUK9M5R2-30EX.pdf

Description:: MOSFET N-CH 30V 70A LFPAK33

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Product details

Overview

BUK9M5R2-30EX from Nexperia is an AEC-Q101-qualified N-channel logic-level MOSFET in LFPAK33 (SOT1210) package, rated for 30 V V_DS, 5.2 mΩ R_DS(on) at V_GS = 5 V and T_j = 25 °C, and 70 A continuous drain current at T_mb = 25 °C. It serves as a high-reliability power switch in automotive 12 V systems requiring thermally robust, avalanche-rated switching for motors, solenoids, and transmission control.

For engineers reviewing the BUK9M5R2-30EX datasheet, BUK9M5R2-30EX pinout, BUK9M5R2-30EX application, or BUK9M5R2-30EX equivalent, this page delivers verified electrical specs, thermal performance data, gate drive behavior at 175 °C, and real-world automotive use context - not generic MOSFET guidance.

Technical Context

This device uses TrenchMOS technology to achieve low on-resistance with true logic-level gate drive: V_GS(th) ≥ 0.5 V at T_j = 175 °C ensures reliable turn-on under extreme thermal stress. Its LFPAK33 package provides 1.58 K/W typical R_th(j-mb), enabling high-power density mounting on PCB copper planes without heatsinks in constrained automotive modules.

The MOSFET is repetitively avalanche rated (E_AS = 79.2 mJ), supports peak drain current up to 358 A (t_p ≤ 10 µs), and features integrated source-drain diode with 21.8 ns t_rr and 14 nC Q_r - critical for freewheeling in inductive load switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V maximum - supports full 12 V automotive battery transient margin (ISO 7637-2 Pulse 5a: up to 35 V) without breakdown.
R_DS(on)	4.3–5.2 mΩ at V_GS = 5 V, T_j = 25 °C - enables <1 W conduction loss at 45 A, reducing thermal load in compact ECUs.
I_D (continuous)	70 A at T_mb = 25 °C - sustains high-current motor actuation while derating predictably to 63 A at T_mb = 100 °C per Fig. 2.
Q_GD	9.7 nC - low gate-drain charge minimizes Miller-induced switching delay and improves hard-switching efficiency in PWM-driven loads.
T_j max	175 °C - qualified for under-hood environments including transmission control units and engine bay actuators.
E_AS	79.2 mJ non-repetitive avalanche energy - protects against inductive kickback during fault conditions without external snubbers.
R_th(j-mb)	1.58–1.89 K/W - enables direct thermal coupling to PCB ground plane, eliminating need for mechanical heatsinks in space-constrained modules.

Pinout & Package

LFPAK33 (SOT1210) is a surface-mount, single-ended power package with exposed mounting base connected to drain. Its 8-lead structure integrates three parallel source terminals and one gate terminal for low-inductance, high-current routing.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	Source (S)	Three independent source connections reduce bond wire inductance and improve current sharing in high-di/dt switching.
4	Gate (G)	Single gate input optimized for 5 V logic-level drive; low Q_G(tot) = 22.5 nC enables fast turn-on with standard microcontroller GPIO.
Mounting Base (mb)	Drain (D)	Exposed copper pad electrically and thermally connected to drain - serves as primary heat path and high-current return path.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability across temperature cycling, humidity, and vibration - required for ECU, body control, and powertrain modules.
True logic-level gate	V_GS(th) ≥ 0.5 V at 175 °C ensures guaranteed turn-on using standard 5 V MCU outputs even at maximum junction temperature.
Repetitive avalanche rating	Rated for repeated unclamped inductive switching events - eliminates need for external protection components in solenoid and motor drivers.
175 °C junction operation	Enables placement in high-temperature zones (e.g., near engines or transmissions) without derating or forced cooling.
Low R_DS(on) × Q_G figure of merit	5.2 mΩ × 22.5 nC = 117 mΩ·nC - balances conduction and switching losses for high-efficiency 10–100 kHz PWM control.

Applications

Engine Control Valve Driver

Transmission Solenoid Switch

Use Scenario: Driving 12 V pulse-width modulated fuel injector or EGR valve in engine management systems.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling coil current with precise duty cycle and fast turn-off to manage valve lift timing.

Use Value: 27.4 ns fall time and 21.8 ns diode t_rr minimize dead-time uncertainty and prevent shoot-through in half-bridge configurations.

Use Scenario: Controlling hydraulic pressure solenoids in automatic transmission valve bodies.

IC Role / Device Role / Timing Role: Low-side switch delivering up to 70 A peak current during gear shift actuation with minimal voltage drop.

Use Value: 5.2 mΩ R_DS(on) limits I²R loss to <2.5 W at 70 A, preventing thermal runaway during sustained engagement cycles.

Body Control Module Lamp Driver

Electric Power Steering Motor Phase Switch

Use Scenario: Switching high-intensity LED headlamps or halogen fog lamps in BCMs.

IC Role / Device Role / Timing Role: Logic-level controlled power switch interfacing directly with 5 V microcontroller outputs.

Use Value: V_GS(th) ≥ 0.5 V at 175 °C guarantees turn-on even when BCM housing reaches >125 °C ambient under hood.

Use Scenario: Half-bridge phase leg in 12 V EPS motor inverters for assist torque generation.

IC Role / Device Role / Timing Role: High-frequency (20–50 kHz) switching element handling bidirectional current with integrated body diode recovery.

Use Value: 14 nC Q_r and 21.8 ns t_rr reduce reverse recovery losses and EMI during commutation, improving system efficiency.

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
STL220N3LLH6	30 V, 2.2 mΩ @ 10 V, requires 10 V gate drive; no AEC-Q101 certification stated	Higher efficiency at high V_GS, but unsuitable for 5 V logic-only systems or automotive qualification-critical designs	Select only if gate driver supports ≥10 V and AEC-Q101 is not required.
IRL8721PBF	30 V, 5.8 mΩ @ 5 V, TO-220AB package, R_th(j-c) = 2.5 K/W, no avalanche rating	Larger footprint, higher thermal resistance, and no repetitive avalanche capability limit use in compact, high-reliability automotive modules	Choose only for prototyping or non-automotive industrial use where board space and qualification are not constraints.

Compared with STL220N3LLH6 and IRL8721PBF, BUK9M5R2-30EX uniquely combines AEC-Q101 compliance, true 5 V logic-level operation at 175 °C, repetitive avalanche ruggedness, and LFPAK33's superior thermal performance - making it the only option qualified for production automotive power switching where size, reliability, and thermal margin are simultaneously critical.

Availability

BUK9M5R2-30EX is available at Aetrix Electronics and suitable for automotive electronic control units, transmission control modules, and body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for Tier 1 OEM programs.

Supply support for BUK9M5R2-30EX 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 and ESD protection.

This part belongs to Nexperia's LFPAK automotive MOSFET product line, engineered specifically for thermally demanding, safety-critical 12 V automotive power switching applications - emphasizing AEC-Q101 reliability, low R_DS(on), and robust avalanche performance.

FAQ

Is BUK9M5R2-30EX pin-compatible with other LFPAK33 MOSFETs?

Yes - all LFPAK33 (SOT1210) MOSFETs share identical mechanical footprint and pin assignment: pins 1–3 are source, pin 4 is gate, and the mounting base is drain. This allows direct PCB layout reuse across Nexperia's LFPAK33 portfolio, including variants like BUK9Y8R5-40E and BUK7K18-40E.

What is the maximum safe operating temperature for continuous use?

The device is rated for continuous operation up to T_j = 175 °C, with thermal derating defined in Fig. 2: at T_mb = 100 °C, continuous drain current is 63 A. Mounting base temperature must be monitored directly; junction temperature is calculated as T_j = T_mb + (P_diss × R_th(j-mb)).

Does BUK9M5R2-30EX require a gate resistor for automotive 5 V MCU drive?

A gate resistor is recommended - typically 10–47 Ω - to dampen ringing caused by PCB trace inductance and MOSFET input capacitance (C_iss = 1855–2467 pF). Without it, overshoot exceeding ±15 V absolute maximum V_GS may occur during fast edge transitions, risking gate oxide damage.

Can this MOSFET replace older TO-220 or DPAK automotive switches?

Yes - its LFPAK33 package offers lower R_th(j-mb) (1.58 K/W vs. ~3.5 K/W for DPAK) and higher current density. However, redesign is required: the SOT1210 footprint differs mechanically, and the mounting base is drain-connected (not isolated), so PCB layout and isolation strategy must be updated accordingly.

BUK9M5R2-30EX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: TrenchMOS™

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):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 70A (Tc)

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

Rds On (Max) @ Id, Vgs:: 4.1mOhm @ 25A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: 22.5 nC @ 5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 2467 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 79W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK33

BUK9M5R2-30EX FAQ

1.How can I place an order for BUK9M5R2-30EX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9M5R2-30EX 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 BUK9M5R2-30EX reliable?

The price and inventory of BUK9M5R2-30EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9M5R2-30EX is usually 5 days.

3.What payment methods are accepted for BUK9M5R2-30EX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9M5R2-30EX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9M5R2-30EX?

BUK9M5R2-30EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9M5R2-30EX 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 BUK9M5R2-30EX?

For technical support, including BUK9M5R2-30EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9M5R2-30EX requirements.

6.How does Aetrix verify that BUK9M5R2-30EX is sourced from the original manufacturer or authorized distributors?

All BUK9M5R2-30EX 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 BUK9M5R2-30EX meets industry standards.

7.What is the process for return or replacement of BUK9M5R2-30EX?

All BUK9M5R2-30EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK9M5R2-30EX, 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 BUK9M5R2-30EX part is unused and in its original packaging.

Return procedure for BUK9M5R2-30EX:

1.Submit a request within 90 days.

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

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