My Inquiry
My Account
Nexperia USA Inc. BUK7K6R2-40E/1X
- Part No.:
- BUK7K6R2-40E/1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-1205, 8-LFPAK56
- Datasheet:
-
BUK7K6R2-40E/1X.pdf
- Description:
- MOSFET 40V 40A LFPAK56D
- Quantity:
- Payment:
- Shipping:
Inventory:2,848
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BUK7K6R2-40E from Nexperia is a dual N-channel standard-level MOSFET in LFPAK56D (SOT1205) package, rated for 40 V VDS, 5.8 mΩ RDS(on) at 10 V VGS and 25 °C, and qualified to AEC-Q101 for automotive use. It integrates two independent power switches with repetitive avalanche rating and 175 °C junction temperature capability, deployed in transmission control and solenoid drive circuits.
For engineers reviewing the BUK7K6R2-40E datasheet, BUK7K6R2-40E pinout, BUK7K6R2-40E application, or BUK7K6R2-40E equivalent, key selection criteria include dual-channel thermal robustness, standard-level gate drive compatibility with 12 V microcontrollers, and validated performance in high-reliability 12 V automotive power switching.
Technical Context
This device implements TrenchMOS technology in a dual-die LFPAK56D package, enabling independent control of two N-channel channels with shared mounting base thermal path. Each FET features true standard-level gate threshold (VGS(th) > 1 V at 175 °C) and is rated for repetitive avalanche energy up to 157 mJ.
The dual-drain/dual-source pinout supports parallel or complementary switching topologies without external isolation. Thermal resistance from junction to mounting base is 2.21 K/W, supporting high-power operation when mounted on thermally optimized PCBs or heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum drain-source blocking voltage compatible with 12 V automotive systems including load dump transients. |
| RDS(on) | 5.8 mΩ @ VGS = 10 V, ID = 20 A, Tj = 25 °C - Low conduction loss enabling efficient 40 A continuous current handling per channel. |
| ID | 40 A - Continuous drain current limited by package thermal capacity at Tmb = 25 °C. |
| Ptot | 68 W - Total power dissipation at Tmb = 25 °C, defining maximum steady-state power handling before thermal derating. |
| QGD | 10.5 nC - Gate-drain charge determining Miller plateau duration and switching speed in hard-switched applications. |
| Rth(j-mb) | 2.21 K/W - Junction-to-mounting-base thermal resistance enabling direct thermal interface design for high-reliability automotive modules. |
| VGS(th) | 1 V min @ Tj = 175 °C - Guaranteed turn-on with standard 5 V/12 V logic drivers under worst-case high-temperature conditions. |
Pinout & Package
LFPAK56D (SOT1205) is a thermally enhanced plastic surface-mount package with 8 leads and exposed copper mounting base for low-inductance, high-current routing and superior heat transfer to PCB copper planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S1 | Source terminal of FET1 - referenced ground node for first channel; electrically isolated from S2 unless externally connected. |
| 2 | G1 | Gate terminal of FET1 - controls turn-on/turn-off of first channel; requires standard-level logic drive (≥4.5 V). |
| 3 | S2 | Source terminal of FET2 - independent return path for second channel; enables dual-load or half-bridge configurations. |
| 4 | G2 | Gate terminal of FET2 - independently controllable gate input for second channel with identical threshold behavior to G1. |
| 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 providing robust current path for first channel with minimized bond wire inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC standard. |
| Repetitive avalanche rating | 157 mJ single-pulse EAS at 40 A, enabling robust operation during inductive load switching without external snubbers. |
| 175 °C junction rating | Full functionality maintained up to Tj = 175 °C, supporting under-hood placement in engine control units and transmission modules. |
| True standard-level gate | VGS(th) ≥ 1 V at 175 °C ensures reliable turn-on using common 5 V or 12 V MCU GPIOs without level-shifting circuitry. |
| Low RDS(on) × QG figure-of-merit | 5.8 mΩ × 32.3 nC = 187 mΩ·nC - balances conduction and switching losses for high-efficiency 10–100 kHz PWM control. |
Applications
| Transmission Control Valve Driver | Engine Cooling Fan Controller |
|---|---|
|
Use Scenario: Driving PWM-controlled hydraulic solenoids in automatic transmission shift actuators requiring precise current regulation and fast response. IC Role / Device Role / Timing Role: Dual-channel power switch delivering bidirectional current control per solenoid coil with independent gate timing for phase-shifted actuation. Use Value: 5.8 mΩ RDS(on) minimizes resistive heating during sustained 20–30 A coil currents, while 175 °C rating ensures stable operation near hot gearbox housings. |
Use Scenario: Controlling brushed DC cooling fans in engine bays where ambient temperatures exceed 105 °C and EMI immunity is critical. IC Role / Device Role / Timing Role: High-side or low-side switching element managing fan motor current with integrated body diode recovery (trr = 25 ns) for clean commutation. Use Value: Repetitive avalanche capability absorbs inductive kickback during abrupt PWM shutdown, eliminating need for external flyback diodes in space-constrained modules. |
| 12 V Battery Disconnect Switch | Electric Power Steering Motor Phase Switch |
|
Use Scenario: Isolating auxiliary battery loads (e.g., infotainment, ADAS ECUs) during cranking or fault conditions to maintain system voltage stability. IC Role / Device Role / Timing Role: Dual-FET configuration used in back-to-back arrangement for bidirectional blocking, controlled via isolated gate drivers. Use Value: Dual 40 V channels support reverse-polarity protection and load dump tolerance up to ±40 V, meeting ISO 7637-2 pulse 5a requirements. |
Use Scenario: Implementing compact, high-current half-bridge legs in EPS motor driver inverters where PCB area and thermal mass are constrained. IC Role / Device Role / Timing Role: Low-inductance LFPAK56D package enables fast switching (tf = 17 ns) with minimal shoot-through risk in 20–50 kHz motor control loops. Use Value: 2.21 K/W Rth(j-mb) allows direct mounting to aluminum heat spreaders, achieving <100 °C junction rise at 30 A RMS without forced air cooling. |
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, but uses PowerFLAT 5x6 package with higher Rth(j-mb) (3.0 K/W) and no AEC-Q101 documentation in public datasheet. | Higher conduction efficiency but lower thermal performance; suitable only where board-level heatsinking is less critical than RDS(on). | Select when lowest possible conduction loss dominates over thermal interface simplicity and automotive qualification assurance. |
| ON Semiconductor NTMFS5C675NL | 40 V, 5.9 mΩ RDS(on), AEC-Q101 qualified, SO-8FL package with Rth(j-mb) = 2.5 K/W and no dual-drain/dual-source pinout - single-channel per package. | Requires two devices for dual-channel function; larger PCB footprint and higher assembly cost than single-package BUK7K6R2-40E. | Choose when existing designs use SO-8FL footprints and dual-channel integration is not required for layout simplification. |
Compared with STL220N4F7AG and NTMFS5C675NL, BUK7K6R2-40E uniquely combines AEC-Q101 validation, dual-channel integration in one LFPAK56D package, and best-in-class 2.21 K/W thermal resistance - making it optimal for new automotive power modules prioritizing reliability, space, and thermal management.
Availability
BUK7K6R2-40E is available at Aetrix Electronics and suitable for automotive transmission control, engine cooling fan management, and 12 V battery disconnect switching requiring stable component supply across multi-year vehicle production cycles.
Supply support for BUK7K6R2-40E 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 essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets with emphasis on efficiency and miniaturization.
BUK7K6R2-40E belongs to Nexperia's Automotive Logic and Power portfolio, engineered specifically for high-reliability 12 V automotive power switching where thermal resilience, AEC-Q101 compliance, and dual-channel integration are mandatory.
FAQ
Is BUK7K6R2-40E pin-compatible with other LFPAK56D dual-MOSFETs?
No - BUK7K6R2-40E has a unique pinout (S1-G1-S2-G2-D2-D2-D1-D1) optimized for dual independent switching. Other LFPAK56D dual-MOSFETs like BUK7K12-40E use different pin assignments (e.g., D1-G1-S1-D2-G2-S2), making them non-interchangeable without PCB redesign.
What is the maximum safe operating frequency for PWM switching?
Based on tf = 17 ns, tr = 16 ns, and QGD = 10.5 nC, the device supports clean switching up to 100 kHz in hard-switched topologies with appropriate gate drive strength (≥2 A peak). Above 50 kHz, layout parasitics and gate resistor selection become critical to avoid oscillation.
Does the body diode support synchronous rectification?
Yes - the integrated source-drain diode has trr = 25 ns and Qr = 18 nC, enabling use in synchronous buck or half-bridge configurations at ≤100 kHz. However, its VSD = 0.78 V at 15 A limits efficiency versus discrete Schottky solutions in high-current, low-voltage rails.
Can BUK7K6R2-40E be used in linear mode (e.g., current regulation)?
It is not recommended - the device lacks Safe Operating Area (SOA) characterization for linear operation beyond short pulses. Its SOA curve (Fig. 4) is defined only for switching duty cycles ≤100 µs; sustained linear operation risks thermal runaway due to positive RDS(on) temperature coefficient above 100 °C.
BUK7K6R2-40E/1X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1205, 8-LFPAK56
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- -
- Configuration:
- -
- FET Feature:
- -
- Drain to Source Voltage (Vdss):
- 40V
- Current - Continuous Drain (Id) @ 25°C:
- 40A (Ta)
- 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 (Ta)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56D
BUK7K6R2-40E/1X FAQ
1.How can I place an order for BUK7K6R2-40E/1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7K6R2-40E/1X 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 BUK7K6R2-40E/1X reliable?
The price and inventory of BUK7K6R2-40E/1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7K6R2-40E/1X is usually 5 days.
3.What payment methods are accepted for BUK7K6R2-40E/1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7K6R2-40E/1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7K6R2-40E/1X?
BUK7K6R2-40E/1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7K6R2-40E/1X 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 BUK7K6R2-40E/1X?
For technical support, including BUK7K6R2-40E/1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7K6R2-40E/1X requirements.
6.How does Aetrix verify that BUK7K6R2-40E/1X is sourced from the original manufacturer or authorized distributors?
All BUK7K6R2-40E/1X 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 BUK7K6R2-40E/1X meets industry standards.
7.What is the process for return or replacement of BUK7K6R2-40E/1X?
All BUK7K6R2-40E/1X units undergo pre-shipment inspection (PSI). If there is an issue with BUK7K6R2-40E/1X, 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 BUK7K6R2-40E/1X part is unused and in its original packaging.
Return procedure for BUK7K6R2-40E/1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BUK7K6R2-40E/1X Tags
-
SSM6N7002KFU,LF
Toshiba Semiconductor and Storage
-
2N7002DW-7-F
Diodes Incorporated
-
SSM6L56FE,LM
Toshiba Semiconductor and Storage
-
SSM6N37FU,LF
Toshiba Semiconductor and Storage
-
2N7002DWH6327XTSA1
Infineon Technologies
-
2N7002BKS,115
Nexperia USA Inc.
-
DMG1016UDW-7
Diodes Incorporated
-
UM6K33NTN
Rohm Semiconductor
-
DMG6602SVT-7
Diodes Incorporated
-
EM6K34T2CR
Rohm Semiconductor
-
UM6K34NTCN
Rohm Semiconductor
-
DMG6601LVT-7
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
