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Nexperia USA Inc. BUK7K6R2-40EX
- Part No.:
- BUK7K6R2-40EX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-1205, 8-LFPAK56
- Datasheet:
-
BUK7K6R2-40EX.pdf
- Description:
- MOSFET 2N-CH 40V 40A LFPAK56D
- Quantity:
- Payment:
- Shipping:
Inventory:3,852
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Product details
Overview
BUK7K6R2-40EX from Nexperia is a dual N-channel standard-level MOSFET in LFPAK56D (SOT1205) package, rated for 40 V drain-source voltage, 5.8 mΩ RDS(on) at 10 VGS/25 °C, and qualified to AEC-Q101 for automotive use. It integrates two independent power switches with true standard-level gate drive (VGS(th) > 1 V at 175 °C), enabling direct microcontroller interface in 12 V systems for motor and solenoid control.
For engineers reviewing the BUK7K6R2-40EX datasheet, BUK7K6R2-40EX pinout, BUK7K6R2-40EX application, or BUK7K6R2-40EX equivalent, key selection criteria include its dual-channel layout, 175 °C junction rating, repetitive avalanche capability, and thermally optimized LFPAK56D footprint - critical for high-reliability automotive power switching where thermal management and gate-drive simplicity are essential.
Technical Context
This device implements TrenchMOS technology in a dual-die LFPAK56D package, delivering matched channel characteristics (FET1/FET2) with identical static and dynamic parameters. Its standard-level gate enables direct drive from 3.3 V or 5 V logic without level-shifting, while the 2.21 K/W junction-to-mounting-base thermal resistance supports high-power operation on compact PCBs.
The MOSFET features fully characterized avalanche ruggedness (157 mJ single-pulse), source-drain diode recovery (trr = 25 ns, Qr = 18 nC), and robust gate oxide integrity (±20 V VGS rating). Its 175 °C continuous operation and AEC-Q101 qualification confirm suitability for under-hood automotive environments subject to thermal cycling and vibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum blocking voltage compatible with 12 V automotive battery systems including load dump transients. |
| RDS(on) | 5.8 mΩ @ 10 VGS, 20 A, 25 °C - Low conduction loss enabling <1.2 W dissipation per FET at 20 A, reducing heatsink requirements. |
| ID | 40 A continuous @ Tmb = 25 °C - Package-limited current capacity suitable for high-current solenoid and motor phase switching. |
| QGD | 10.5 nC - Gate-drain charge value directly impacts switching speed and EMI; enables fast turn-off with low external gate resistance. |
| Tj max | 175 °C - Junction temperature rating allows sustained operation in engine bay environments without derating below ambient 125 °C. |
| EAS | 157 mJ - Non-repetitive avalanche energy rating ensures robustness against inductive kickback in relay and motor drive applications. |
| Rth(j-mb) | 2.21 K/W - Thermal resistance from junction to mounting base enables efficient heat transfer to copper pour or heatsink, critical for power density. |
Pinout & Package
Package: LFPAK56D (SOT1205), plastic surface-mount package with exposed mounting base for enhanced thermal performance and mechanical robustness in automotive vibration environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S1 | Source terminal of FET1 - electrically isolated from S2; connects to low-side return path for first switch. |
| 2 | G1 | Gate terminal of FET1 - controls turn-on/turn-off of first MOSFET; requires standard-level logic drive (≥1 V threshold at 175 °C). |
| 3 | S2 | Source terminal of FET2 - independent of S1; enables dual low-side or half-bridge configurations with separate source returns. |
| 4 | G2 | Gate terminal of FET2 - independently controllable gate input; supports asynchronous or synchronized dual-switch operation. |
| 5, 6 | D2 | Drain terminals of FET2 - paralleled pins for low-inductance, high-current connection to load or bus rail. |
| 7, 8 | D1 | Drain terminals of FET1 - paralleled pins for low-impedance, high-current drain connection; shares mounting base with D2. |
Key Features
| Feature | Design Value |
|---|---|
| Dual N-channel configuration | Two matched, electrically isolated MOSFETs in one package - reduces board area by ~40% vs. discrete dual-SO8 solutions and eliminates trace-length mismatch in timing-critical switching. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD - required for engine control, transmission, and body electronics modules. |
| Repetitive avalanche rated | Rated for repeated inductive energy clamping without degradation - enables robust operation in unclamped inductive loads like fuel injectors and HVAC actuators. |
| 175 °C continuous operation | Full electrical specification maintained up to 175 °C junction temperature - eliminates need for thermal derating in high-ambient under-hood locations. |
| True standard-level gate | VGS(th) > 1 V at 175 °C - ensures guaranteed turn-on with 3.3 V or 5 V MCU GPIO, eliminating external level shifters and associated BOM cost. |
Applications
| Engine Control Unit (ECU) Fuel Injector Drive | Automatic Transmission Solenoid Control |
|---|---|
|
Use Scenario: High-speed, high-current switching of 12 V fuel injectors in gasoline direct injection systems requiring precise pulse-width modulation at up to 200 Hz. IC Role / Device Role: Low-side driver for injector coil; each FET handles one injector channel with independent gate control. Use Value: 5.8 mΩ RDS(on) minimizes resistive heating during extended duty cycles, while 157 mJ avalanche rating absorbs coil flyback energy without external snubbers. |
Use Scenario: PWM-controlled hydraulic solenoids in 8-speed automatic transmissions, operating continuously at 125 °C ambient with frequent thermal cycling. IC Role / Device Role: Dual-channel low-side switch managing pressure control and shift solenoids; FET1 and FET2 operate independently per valve bank. Use Value: 175 °C Tj rating and AEC-Q101 qualification ensure long-term reliability; matched RDS(on) between channels maintains consistent solenoid response across gear shifts. |
| Electric Power Steering (EPS) Motor Phase Switching | Body Control Module (BCM) Lamp & Relay Driver |
|
Use Scenario: Half-bridge leg in 12 V EPS motor drivers, where one BUK7K6R2-40EX provides both high-side and low-side switching via external bootstrap or isolated gate drive. IC Role / Device Role: Dual N-channel configured as synchronous rectifier and active switch in compact half-bridge topology. Use Value: LFPAK56D's 2.21 K/W Rth(j-mb) enables 40 A peak current handling without forced air cooling; low QGD (10.5 nC) supports 20 kHz PWM with minimal switching loss. |
Use Scenario: Centralized lamp dimming and relay actuation in BCMs, driving multiple 12 V incandescent, LED, and inductive loads with shared ground architecture. IC Role / Device Role: Dual low-side switch managing headlamp high/low beam and rear fog lamp circuits; S1/S2 provide galvanically separated return paths. Use Value: Independent source pins (S1/S2) eliminate crosstalk between lamp circuits; 40 V VDS withstands ISO 7637-2 pulse 5a (load dump) up to 40 V without protection diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | 40 V, 2.2 mΩ RDS(on), 175 °C, PowerFLAT 5x6 package; lower RDS(on) but higher QG (49 nC) and no AEC-Q101 documentation in public datasheet. | Higher efficiency at high current, but slower switching and unverified automotive qualification limits use in safety-critical ECU functions. | Select when ultra-low conduction loss dominates over switching speed and formal AEC-Q101 compliance is not mandated. |
| ON Semiconductor NTMFS5C675NL | 40 V, 4.5 mΩ RDS(on), 175 °C, SO-8 package; AEC-Q101 qualified, but single-channel - requires two devices for dual functionality. | Same thermal and voltage specs, but doubles PCB area, gate drive complexity, and BOM count versus integrated dual-channel solution. | Select only if existing SO-8 layout constraints prevent LFPAK56D adoption or if channel isolation requirements exceed internal die separation. |
Compared with STL220N4F7AG and NTMFS5C675NL, BUK7K6R2-40EX uniquely combines AEC-Q101 validation, dual-channel integration in LFPAK56D, and guaranteed 1 V gate threshold at 175 °C - making it optimal for space-constrained, thermally demanding automotive modules where gate-drive simplicity and qualification traceability are non-negotiable.
Availability
BUK7K6R2-40EX is available at Aetrix Electronics and suitable for automotive engine control units, transmission control modules, and electric power steering systems requiring stable component supply across multi-year vehicle production lifecycles.
Supply support for BUK7K6R2-40EX 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, ESD protection, and analog solutions.
BUK7K6R2-40EX belongs to Nexperia's Automotive Logic and Power portfolio, engineered specifically for thermally aggressive 12 V automotive subsystems where AEC-Q101 compliance, junction temperature resilience, and gate-drive compatibility with mainstream MCUs are foundational design requirements.
FAQ
Is BUK7K6R2-40EX pin-compatible with other LFPAK56D dual MOSFETs?
No - BUK7K6R2-40EX uses a unique 8-pin LFPAK56D pinout (S1-G1-S2-G2-D2-D2-D1-D1) with dual drain and source pins per channel. Other dual LFPAK56D devices may differ in pin assignment or internal connectivity; always verify against the specific device's pinning table before PCB layout.
What is the maximum continuous drain current per channel at 100 °C mounting base temperature?
At Tmb = 100 °C, the continuous drain current per channel is 40 A (per Table 5 limiting values), limited by package thermal capacity rather than silicon. Derating begins above 100 °C, reaching ~25 A at Tmb = 125 °C based on Fig. 1 normalized ID curve.
Does BUK7K6R2-40EX require external gate resistors for automotive PWM operation?
Yes - although its 10.5 nC QGD supports fast switching, an external gate resistor (typically 5–10 Ω) is recommended to damp ringing, limit peak gate current, and control dV/dt during turn-on/off in noisy automotive environments per Nexperia application note AN10273.
Can the two MOSFETs be used in a synchronous buck converter configuration?
Yes - FET1 and FET2 can serve as high-side and low-side switches in a synchronous buck stage when paired with appropriate gate drive (e.g., bootstrap for high-side). Their matched RDS(on) and thermal coupling in LFPAK56D improve current sharing and thermal balance under PWM operation.
BUK7K6R2-40EX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1205, 8-LFPAK56
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- MOSFET (Metal Oxide)
- Configuration:
- 2 N-Channel (Dual)
- FET Feature:
- -
- Drain to Source Voltage (Vdss):
- 40V
- Current - Continuous Drain (Id) @ 25°C:
- 40A
- Rds On (Max) @ Id, Vgs:
- 5.8mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 32.3nC @ 10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2210pF @ 25V
- Power - Max:
- 68W
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56D
BUK7K6R2-40EX FAQ
1.How can I place an order for BUK7K6R2-40EX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7K6R2-40EX 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 BUK7K6R2-40EX reliable?
The price and inventory of BUK7K6R2-40EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7K6R2-40EX is usually 5 days.
3.What payment methods are accepted for BUK7K6R2-40EX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7K6R2-40EX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7K6R2-40EX?
BUK7K6R2-40EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7K6R2-40EX 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 BUK7K6R2-40EX?
For technical support, including BUK7K6R2-40EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7K6R2-40EX requirements.
6.How does Aetrix verify that BUK7K6R2-40EX is sourced from the original manufacturer or authorized distributors?
All BUK7K6R2-40EX 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 BUK7K6R2-40EX meets industry standards.
7.What is the process for return or replacement of BUK7K6R2-40EX?
All BUK7K6R2-40EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7K6R2-40EX, 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 BUK7K6R2-40EX part is unused and in its original packaging.
Return procedure for BUK7K6R2-40EX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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