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Nexperia USA Inc. BUK7M6R3-40EX
- Part No.:
- BUK7M6R3-40EX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SOT-1210, 8-LFPAK33 (5-Lead)
- Datasheet:
-
BUK7M6R3-40EX.pdf
- Description:
- MOSFET N-CH 40V 70A LFPAK33
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
BUK7M6R3-40EX from Nexperia is a standard-level N-channel MOSFET rated for 40 V drain-source voltage, 6.3 mΩ RDS(on) at VGS = 10 V and Tj = 25 °C, and 70 A continuous drain current at Tmb = 25 °C - housed in the thermally enhanced LFPAK33 (SOT1210) package. It is AEC-Q101 qualified and designed for high-reliability automotive power switching in 12 V systems.
For engineers reviewing the BUK7M6R3-40EX datasheet, BUK7M6R3-40EX pinout, BUK7M6R3-40EX application, or BUK7M6R3-40EX equivalent, key selection criteria include its 175 °C junction rating, repetitive avalanche capability, true standard-level gate threshold (>1 V at 175 °C), and low thermal resistance (Rth(j-mb) = 1.58 K/W).
Technical Context
This MOSFET employs TrenchMOS technology to achieve low on-resistance and fast switching performance. Its gate threshold voltage remains functional up to 175 °C, enabling stable operation in under-hood automotive environments without requiring level-shifting circuitry.
The device features an integrated source-drain diode with 0.85 V forward voltage at 20 A and 25 °C, and supports unclamped inductive switching with 58.8 mJ non-repetitive avalanche energy. The mounting base (Pin mb) is internally connected to the drain, enabling direct thermal coupling to heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum blocking voltage for 12 V automotive battery systems with load-dump transients. |
| RDS(on) | 6.3 mΩ max at VGS = 10 V, ID = 20 A, Tj = 25 °C - Enables <1 W conduction loss at 40 A, reducing heatsink requirements. |
| ID (continuous) | 70 A at Tmb = 25 °C - Supports high-current motor/solenoid loads with derating above 25 °C mounting base temperature. |
| Ptot | 79 W at Tmb = 25 °C - High power handling enabled by low Rth(j-mb) = 1.58 K/W for efficient heat transfer to PCB/heatsink. |
| VGS(th) | >1 V at Tj = 175 °C - Ensures reliable turn-on with standard 5 V or 3.3 V logic drivers across full automotive temperature range. |
| EAS | 58.8 mJ - Rated unclamped avalanche energy enables robustness against inductive kickback in transmission control and lamp driving. |
| QGD | 9.5 nC - Low gate-drain charge minimizes Miller-induced switching delay and improves hard-switching efficiency. |
Pinout & Package
LFPAK33 (SOT1210) is a surface-mount, single-ended power package with exposed copper mounting base for superior thermal performance. It integrates three parallel source terminals and one gate terminal, with the drain electrically and thermally connected to the mounting base (Pin mb).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Source (S) | Three low-inductance, paralleled source connections reduce conduction losses and improve current sharing in high-frequency switching. |
| 4 | Gate (G) | Single gate input optimized for standard-level drive; compatible with microcontroller GPIO or dedicated gate drivers without level shifters. |
| mb | Mounting Base / Drain (D) | Exposed copper pad tied internally to drain - serves as primary thermal path and high-current drain connection; requires soldered thermal pad on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and humidity testing per JESD47. |
| Repetitive avalanche rating | Rated for repeated inductive energy dissipation - critical for solenoid and motor commutation without external snubbers. |
| 175 °C maximum junction temperature | Enables operation in engine bay environments where ambient temperatures exceed 125 °C without derating gate drive. |
| True standard-level VGS(th) | Guaranteed >1 V at 175 °C - eliminates need for gate voltage boosters in 12 V automotive systems using 3.3 V/5 V controllers. |
| Low Rth(j-mb) | 1.58 K/W typical - delivers 2× better thermal performance than comparable SO-8 packages, reducing board area and heatsink cost. |
Applications
| Engine Control Module (ECM) Fuel Injector Driver | Automatic Transmission Solenoid Control |
|---|---|
Use Scenario: Precise PWM-controlled current delivery to high-speed fuel injectors in gasoline direct injection systems. IC Role / Device Role / Timing Role: High-side or low-side power switch managing 12 V, 4–6 A injector coils with 1–2 ms switching cycles. Use Value: 6.3 mΩ RDS(on) limits conduction loss to <150 mW at 6 A, while 9.5 nC QGD ensures clean turn-off during critical valve timing windows. |
Use Scenario: Driving linear or on/off solenoids in 8-speed automatic transmissions, subject to harsh vibration and thermal cycling. IC Role / Device Role / Timing Role: Low-side switch controlling 12 V, 2–5 A solenoid loads with burst-mode actuation and sustained hold phases. Use Value: Repetitive avalanche rating absorbs inductive flyback without clamping diodes; 175 °C rating maintains function during extended gear-shift thermal events. |
| LED Headlamp High-Beam Switching | Electric Power Steering (EPS) Motor Phase Control |
Use Scenario: High-current switching of multi-LED arrays (up to 40 W) in adaptive front-lighting systems (AFS). IC Role / Device Role / Timing Role: Low-side PWM switch delivering 12 V, up to 3.3 A per channel with 100–500 Hz dimming frequency. Use Value: 70 A continuous rating allows headroom for surge currents; 0.85 V diode VSD minimizes reverse recovery loss during PWM dead-time. |
Use Scenario: Half-bridge phase leg in 12 V EPS motor inverters, operating continuously under high ambient temperature and mechanical stress. IC Role / Device Role / Timing Role: N-channel high-side or low-side switch in 3-phase inverter, switching at ≤20 kHz with tight dead-time control. Use Value: Low QGD/QG ratio (9.5/28.1 nC) reduces shoot-through risk; Rth(j-mb) = 1.58 K/W sustains 150 °C junction temp during peak torque events. |
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 |
|---|---|---|---|
| STL220N4F7AG | 40 V, 2.2 mΩ RDS(on), 220 A ID, PowerFLAT 5x6 package; higher current, lower RDS(on), but larger footprint and no AEC-Q101 documentation cited in public datasheet. | Preferred for ultra-high-current EPS inverters where space permits; not validated for same automotive qualification scope. | Select when lower conduction loss justifies larger PCB area and additional qualification effort. |
| ON Semiconductor NTMFS4C09NT1G | 40 V, 4.2 mΩ RDS(on), 75 A ID, SO-8 package; AEC-Q101 qualified, but Rth(j-mb) = 3.0 K/W - 90 % higher thermal resistance than BUK7M6R3-40EX. | Suitable for less thermally constrained modules (e.g., body control units); limited in under-hood motor drives due to thermal bottleneck. | Choose only if legacy SO-8 layout reuse is mandatory and thermal margin ≥25 °C is available. |
Compared with STL220N4F7AG and NTMFS4C09NT1G, BUK7M6R3-40EX uniquely balances AEC-Q101 compliance, 1.58 K/W thermal resistance, and 6.3 mΩ on-resistance in a compact LFPAK33 footprint - making it optimal for space- and thermally constrained automotive power stages where qualification traceability and thermal efficiency are jointly critical.
Availability
BUK7M6R3-40EX is available at Aetrix Electronics and suitable for automotive engine control, transmission actuation, and LED lighting systems requiring stable component supply across long production lifecycles.
Supply support for BUK7M6R3-40EX 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 device belongs to Nexperia's LFPAK automotive MOSFET product line, engineered specifically for thermally demanding 12 V vehicle subsystems where AEC-Q101 compliance, avalanche ruggedness, and package-level thermal efficiency are non-negotiable.
FAQ
Is BUK7M6R3-40EX pin-compatible with other LFPAK33 MOSFETs?
Yes - all LFPAK33 (SOT1210) MOSFETs share identical mechanical footprint and pin assignment: Pins 1–3 = Source, Pin 4 = Gate, mounting base = Drain. This enables drop-in replacement within the same package family, provided RDS(on), voltage rating, and thermal design margins align.
What is the maximum recommended gate resistor for driving BUK7M6R3-40EX at 20 kHz?
A 5 Ω external gate resistor is validated in the datasheet for 20 kHz switching with 10 V drive and 20 A load. Using this value achieves 15.7 ns rise time and 17.6 ns fall time while limiting peak gate current to <2 A and preventing oscillation on the gate loop.
Does BUK7M6R3-40EX require a gate driver IC in automotive applications?
No - its standard-level gate (VGS(th) >1 V at 175 °C) allows direct drive from 3.3 V or 5 V microcontrollers in most 12 V automotive loads. However, a gate driver is recommended for high-frequency PWM (>50 kHz) or high-current (>30 A) applications to ensure fast, low-loss switching.
How does the mounting base (mb) connection affect PCB layout?
The mounting base is electrically tied to the drain and must be soldered to a large, thermally optimized copper pour (≥200 mm²) connected to internal ground or chassis planes. Thermal vias (≥8 × 0.3 mm) beneath the pad are required to transfer heat to inner layers or heatsinks - failure to do so risks exceeding 175 °C junction temperature.
BUK7M6R3-40EX 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:
- 70A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 6.3mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 28.1 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1912 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
BUK7M6R3-40EX FAQ
1.How can I place an order for BUK7M6R3-40EX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7M6R3-40EX 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 BUK7M6R3-40EX reliable?
The price and inventory of BUK7M6R3-40EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7M6R3-40EX is usually 5 days.
3.What payment methods are accepted for BUK7M6R3-40EX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7M6R3-40EX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7M6R3-40EX?
BUK7M6R3-40EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7M6R3-40EX 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 BUK7M6R3-40EX?
For technical support, including BUK7M6R3-40EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7M6R3-40EX requirements.
6.How does Aetrix verify that BUK7M6R3-40EX is sourced from the original manufacturer or authorized distributors?
All BUK7M6R3-40EX 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 BUK7M6R3-40EX meets industry standards.
7.What is the process for return or replacement of BUK7M6R3-40EX?
All BUK7M6R3-40EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7M6R3-40EX, 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 BUK7M6R3-40EX part is unused and in its original packaging.
Return procedure for BUK7M6R3-40EX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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