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Nexperia USA Inc. BUK7K6R8-40E,115
- Part No.:
- BUK7K6R8-40E,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-1205, 8-LFPAK56
- Datasheet:
-
BUK7K6R8-40E,115.pdf
- Description:
- MOSFET 2N-CH 40V 40A LFPAK56D
- Quantity:
- Payment:
- Shipping:
Inventory:2,462
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Product details
Overview
BUK7K6R8-40E from Nexperia is a dual N-channel standard-level MOSFET in LFPAK56D (SOT1205) package, rated for 40 V drain-source voltage, 6.8 mΩ RDS(on) at 10 VGS/25 °C, and qualified to AEC-Q101 for automotive use. It delivers 40 A continuous drain current at Tmb = 25 °C and supports thermally demanding applications up to 175 °C junction temperature - deployed in transmission control and solenoid switching circuits.
For engineers reviewing the BUK7K6R8-40E datasheet, BUK7K6R8-40E pinout, BUK7K6R8-40E application, or BUK7K6R8-40E equivalent, key selection criteria include its dual-channel layout, true standard-level gate drive (VGS(th) > 1 V at 175 °C), repetitive avalanche rating, and low thermal resistance of 2.36 K/W (junction-to-mounting base).
Technical Context
This device integrates two independent N-channel TrenchMOS transistors in a single LFPAK56D package with shared mounting base and isolated source/gate/drain terminals. Its dual-die architecture enables space-efficient half-bridge or parallel-switching configurations without cross-conduction risk.
The MOSFET features a robust 130 mJ single-pulse avalanche energy rating (ID = 40 A, Vsup ≤ 40 V, Tj(init) = 25 °C) and maintains stable RDS(on) performance across -55 °C to 175 °C, with typical on-resistance increasing only 2.3× from 25 °C to 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V maximum - supports 12 V automotive systems with margin against load dump transients. |
| RDS(on) | 6.8 mΩ typ at VGS = 10 V, ID = 20 A, Tj = 25 °C - enables <1.4 W conduction loss at 40 A. |
| ID (cont) | 40 A at Tmb = 25 °C - requires heatsinking above ~60 °C mounting base temperature per Fig. 1. |
| Ptot | 64 W at Tmb = 25 °C - enabled by low Rth(j-mb) = 2.36 K/W for direct PCB copper pad cooling. |
| VGS(th) | ≥1 V at Tj = 175 °C - ensures reliable turn-on with standard 5 V or 3.3 V logic-level controllers. |
| EAS | 130 mJ single-pulse avalanche energy - protects against inductive switching spikes in motor/solenoid loads. |
| QGD | 9.1 nC - low gate-drain charge reduces Miller-induced switching delay and improves hard-switching robustness. |
Pinout & Package
LFPAK56D (SOT1205) is a thermally enhanced surface-mount package with exposed copper mounting base for low-inductance, high-current routing and efficient heat transfer to PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S1 | Source terminal for FET1 - electrically isolated from S2; connects to low-side return path of first channel. |
| 2 | G1 | Gate terminal for FET1 - controls turn-on/turn-off of first MOSFET independently. |
| 3 | S2 | Source terminal for FET2 - isolated from S1; enables independent grounding or floating source configurations. |
| 4 | G2 | Gate terminal for FET2 - allows asynchronous or complementary control of second channel. |
| 5, 6 | D2 | Drain terminals for FET2 - paralleled pins reduce current density and package inductance for high di/dt loads. |
| 7, 8 | D1 | Drain terminals for FET1 - paralleled pins support high peak currents up to 276 A (pulsed). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock. |
| Repetitive avalanche rating | Rated for repeated inductive energy dissipation without degradation - critical for transmission valve drivers. |
| 175 °C junction rating | Enables operation in engine bay locations where ambient exceeds 125 °C, reducing need for derating or forced cooling. |
| True standard-level gate | VGS(th) remains >1 V at 175 °C - eliminates need for gate boosters or level shifters in 5 V MCU-controlled systems. |
| Low Rth(j-mb) | 2.36 K/W thermal resistance - allows >25 W power dissipation with only 60 °C rise above 100 °C mounting base. |
Applications
| Transmission Control Module | Engine Start-Stop Solenoid Driver |
|---|---|
|
Use Scenario: High-reliability switching of hydraulic pressure control valves in automatic transmissions, operating continuously at 125 °C ambient. IC Role / Device Role / Timing Role: Dual-channel power switch enabling independent activation of shift solenoids and pressure regulators. Use Value: Repetitive avalanche capability absorbs inductive kickback during rapid valve de-energization, preventing system reset or ECU damage. |
Use Scenario: Controlling starter motor engagement solenoid in 12 V start-stop systems with frequent cycling and high ambient under-hood temperatures. IC Role / Device Role / Timing Role: Low-RDS(on) N-channel switch replacing mechanical relays to improve response time and lifetime. Use Value: 6.8 mΩ on-resistance minimizes voltage drop (<300 mV at 40 A), ensuring full solenoid actuation even at low battery voltage (9.6 V). |
| Electric Power Steering Motor Driver | Body Control Module Lamp Load Switch |
|
Use Scenario: Half-bridge high-side/low-side configuration driving brushed DC assist motor in EPS systems, subject to ISO 7637-2 pulse 5a transients. IC Role / Device Role / Timing Role: Dual FET used as synchronous rectifier and PWM switch in motor H-bridge output stage. Use Value: Matched RDS(on) between channels ensures balanced conduction losses and thermal distribution during bidirectional motor control. |
Use Scenario: Replacing electromechanical relays for headlamp, fog lamp, and interior lighting control in BCMs with strict EMC and lifetime requirements. IC Role / Device Role / Timing Role: Single-channel N-MOSFET switch handling up to 15 A resistive lamp loads with soft-start PWM dimming. Use Value: Standard-level gate compatibility allows direct drive from 3.3 V or 5 V microcontroller GPIO, eliminating external level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4LFBAG | 40 V, 2.2 mΩ RDS(on), 175 °C, but uses PowerFLAT 5x6 package with higher Rth(j-mb) (3.5 K/W) and no AEC-Q101 certification. | Higher efficiency at high current, but lacks automotive qualification and thermal performance for sustained 100 °C+ mounting base conditions. | Select when absolute lowest conduction loss dominates and qualification is not required; avoid for safety-critical automotive modules. |
| ON Semiconductor NTMFS5C675NL | 40 V, 5.2 mΩ RDS(on), AEC-Q101 qualified, SO-8FL package, Rth(j-mb) = 3.0 K/W, no repetitive avalanche rating. | Better RDS(on) than BUK7K6R8-40E but lacks avalanche ruggedness - unsuitable for inductive solenoid or motor loads without external clamping. | Prefer for resistive or lightly inductive loads where compact footprint matters more than transient robustness. |
Compared with STL220N4LFBAG and NTMFS5C675NL, the BUK7K6R8-40E uniquely combines AEC-Q101 qualification, repetitive avalanche rating, and industry-leading 2.36 K/W thermal resistance - making it the only option among the three validated for thermally aggressive, inductive automotive power switching with zero external protection components.
Availability
BUK7K6R8-40E is available at Aetrix Electronics and suitable for automotive transmission control, engine start-stop systems, and electric power steering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BUK7K6R8-40E 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for automotive, industrial, and computing markets.
This device belongs to Nexperia's AEC-Q101-qualified TrenchMOS automotive power portfolio, engineered specifically for robust, thermally efficient switching in 12 V vehicle subsystems where reliability under extreme thermal stress is non-negotiable.
FAQ
Is BUK7K6R8-40E pin-compatible with other LFPAK56D dual MOSFETs?
No - while the LFPAK56D (SOT1205) package outline is standardized, pin assignments vary across manufacturers and part families. BUK7K6R8-40E uses a specific 1–8 pinning: S1-G1-S2-G2-D2-D2-D1-D1. Always verify pin function against the official Nexperia datasheet before board layout or replacement.
Can BUK7K6R8-40E be driven directly by a 3.3 V microcontroller?
Not reliably - its VGS(th) minimum is 1 V at 175 °C, but full enhancement requires ≥10 V for specified RDS(on). At 3.3 V, RDS(on) rises sharply (>50 mΩ), increasing conduction loss and self-heating. A gate driver or level shifter is required for optimal performance.
What is the maximum recommended PCB copper area for thermal performance?
Nexperia recommends ≥100 mm² of 2 oz (70 µm) copper connected to the mounting base (pins 5–8) for optimal thermal performance. Larger areas further reduce Rth(j-mb); however, the datasheet specifies 2.36 K/W with a defined test board - exceeding that area yields diminishing returns without additional thermal vias or internal layers.
Does BUK7K6R8-40E include integrated ESD protection?
No - this MOSFET does not integrate on-chip ESD protection diodes. External TVS devices are recommended on gate and drain lines in automotive environments to withstand ISO 10605 ±8 kV contact discharge and ±15 kV air discharge events.
BUK7K6R8-40E,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- TrenchMOS™
- 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:
- 6.8mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 28.9nC @ 10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1947pF @ 25V
- Power - Max:
- 64W
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56D
BUK7K6R8-40E,115 FAQ
1.How can I place an order for BUK7K6R8-40E,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7K6R8-40E,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 BUK7K6R8-40E,115 reliable?
The price and inventory of BUK7K6R8-40E,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7K6R8-40E,115 is usually 5 days.
3.What payment methods are accepted for BUK7K6R8-40E,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7K6R8-40E,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7K6R8-40E,115?
BUK7K6R8-40E,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7K6R8-40E,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 BUK7K6R8-40E,115?
For technical support, including BUK7K6R8-40E,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7K6R8-40E,115 requirements.
6.How does Aetrix verify that BUK7K6R8-40E,115 is sourced from the original manufacturer or authorized distributors?
All BUK7K6R8-40E,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 BUK7K6R8-40E,115 meets industry standards.
7.What is the process for return or replacement of BUK7K6R8-40E,115?
All BUK7K6R8-40E,115 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7K6R8-40E,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 BUK7K6R8-40E,115 part is unused and in its original packaging.
Return procedure for BUK7K6R8-40E,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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