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Nexperia USA Inc. BUK9M6R7-40HX
- Part No.:
- BUK9M6R7-40HX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SOT-1210, 8-LFPAK33 (5-Lead)
- Datasheet:
-
BUK9M6R7-40HX.pdf
- Description:
- MOSFET N-CH 40V 50A LFPAK33
- Quantity:
- Payment:
- Shipping:
Inventory:4,494
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Product details
Overview
BUK9M6R7-40HX from Nexperia is an automotive-qualified N-channel logic-level MOSFET in LFPAK33 (SOT1210) package, rated for 40 V VDS, 6.7 mΩ RDS(on) at VGS = 10 V and Tj = 25 °C, and 50 A continuous drain current at Tmb = 25 °C. It delivers high power density in 12 V automotive systems including body control modules and LED lighting drivers.
For engineers reviewing the BUK9M6R7-40HX datasheet, BUK9M6R7-40HX pinout, BUK9M6R7-40HX application, or BUK9M6R7-40HX equivalent, key selection criteria include its AEC-Q101 qualification to 175 °C, repetitive avalanche rating, gull-wing lead geometry for AOI compatibility, and thermal resistance of 2.09 K/W from junction to mounting base.
Technical Context
This MOSFET employs Trench 9 superjunction technology to achieve low conduction losses and high power density while maintaining robust switching performance. Its LFPAK33 copper clip construction enhances thermal transfer and mechanical reliability over standard SO8 packages.
The device features a logic-level gate threshold (VGS(th) = 0.7–2.15 V), enabling direct drive from 3.3 V/5 V microcontrollers, and includes a source-drain diode with soft recovery (S = 0.6 at dIS/dt = −100 A/µs) for reduced EMI in inductive switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum drain-source blocking voltage; suitable for 12 V automotive battery rail with load dump margin. |
| RDS(on) | 6.7 mΩ @ VGS = 10 V, ID = 20 A, Tj = 25 °C - Enables <1 W conduction loss at 40 A, critical for thermally constrained PCB layouts. |
| ID (cont) | 50 A @ Tmb = 25 °C - Validated continuous current under ideal heatsinking; limited by PCB copper area and ambient conditions in practice. |
| EAS | 28 mJ - Non-repetitive avalanche energy at Tj(init) = 25 °C; supports unclamped inductive turn-off without external snubbers. |
| Rth(j-mb) | 2.09 K/W - Junction-to-mounting-base thermal resistance; enables >40 W dissipation with 85 °C temperature rise above board. |
| QGD | 2.5 nC @ VGS = 4.5 V - Low gate-drain charge reduces Miller-induced shoot-through risk in half-bridge configurations. |
| VGS(th) | 1.45–2.15 V @ Tj = 25 °C - Logic-level threshold ensures full enhancement with 3.3 V MCU GPIO, eliminating level-shifter need. |
Pinout & Package
LFPAK33 (SOT1210) is a surface-mount, copper-clip package with gull-wing leads and an exposed mounting base electrically connected to the drain. Its 0.65 mm pitch and 3.2 × 2.0 mm footprint enable high-density layout and superior thermal performance versus SO8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Source (S) | Three parallel source terminals reduce bond wire inductance and improve current sharing in high-di/dt applications. |
| 4 | Gate (G) | Single gate input with 0.8 Ω typical gate resistance; optimized for 5 Ω external gate resistor to balance switching speed and ringing. |
| Mounting Base (mb) | Drain (D) | Exposed copper pad tied internally to drain; serves as primary thermal path and high-current return node for PCB copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified to 175 °C | Validated for under-hood automotive environments including engine control units and transmission modules. |
| Repetitive avalanche rated | Withstands repeated inductive energy dumps without degradation-enables simplified protection in motor drive and solenoid control. |
| Gull-wing leads | Enables automated optical inspection (AOI) and improves solder joint reliability vs. J-lead or QFN packages. |
| Trench 9 superjunction architecture | Delivers 30 % lower RDS(on) × QG figure-of-merit than prior-generation TrenchMOS, reducing switching + conduction losses. |
| Soft-recovery source-drain diode | S = 0.6 ensures controlled reverse recovery with minimal voltage overshoot and EMI generation in buck or H-bridge topologies. |
Applications
| Body Control Module (BCM) | Automotive LED Headlamp Driver |
|---|---|
|
Use Scenario: High-side switching of 12 V loads including door locks, window lifts, and interior lighting. IC Role / Device Role / Timing Role: Power switch controlling load activation timing and current limiting via PWM dimming or on/off sequencing. Use Value: 6.7 mΩ RDS(on) minimizes heat generation in space-constrained BCM PCBs; AEC-Q101 qualification ensures 15-year field reliability. |
Use Scenario: Low-side PWM current regulation for adaptive front-lighting systems (AFS) with multiple LED strings. IC Role / Device Role / Timing Role: Synchronous rectifier and current sink in buck-based constant-current driver stage. Use Value: 2.5 nC QGD enables clean 20 kHz+ PWM switching with minimal dead-time penalty; soft diode prevents LED string voltage spikes. |
| 12 V DC-DC Converter Primary Switch | Electric Power Steering (EPS) Motor Phase Leg |
|
Use Scenario: High-efficiency synchronous buck converter supplying 5 V/3.3 V rails from vehicle battery. IC Role / Device Role / Timing Role: Low-side switch in synchronous rectification topology, operating at 300–500 kHz with precise duty-cycle control. Use Value: 2.09 K/W Rth(j-mb) allows >35 W dissipation on 2 oz copper; gull-wing leads ensure consistent reflow yield across production batches. |
Use Scenario: Half-bridge phase leg in 12 V EPS motor inverter driving brushed or BLDC assist motors. IC Role / Device Role / Timing Role: High-current, high-reliability switching element handling peak currents up to 282 A in pulsed operation. Use Value: Repetitive avalanche rating eliminates need for external clamping diodes; 50 A continuous rating supports sustained torque demand during parking maneuvers. |
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), PowerFLAT 5×6 package, higher capacitance (Ciss = 3900 pF) | Better conduction loss but slower switching; requires larger gate driver due to higher QG (45 nC) | Select when thermal budget dominates over switching frequency; avoid in >200 kHz converters due to increased switching loss. |
| ON Semiconductor NTMFS5C670NL | 40 V, 5.2 mΩ RDS(on), SO-8 package, non-automotive grade (no AEC-Q101) | Lacks automotive qualification and avalanche rating; lower thermal performance (Rth(j-a) ≈ 50 K/W) | Acceptable only for non-safety-critical cabin electronics with full thermal derating and external avalanche protection. |
Compared with STL220N4F7AG and NTMFS5C670NL, BUK9M6R7-40HX uniquely balances AEC-Q101 compliance, 6.7 mΩ conduction loss, and 2.5 nC QGD for high-frequency automotive switching-making it optimal for space- and reliability-constrained 12 V systems where qualification and EMI control are mandatory.
Availability
BUK9M6R7-40HX is available at Aetrix Electronics and suitable for automotive body electronics, LED lighting control, and 12 V DC-DC conversion requiring stable component supply across multi-year production cycles.
Supply support for BUK9M6R7-40HX 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive MOSFETs and ESD protection.
This device belongs to Nexperia's LFPAK automotive MOSFET product line, engineered specifically for AEC-Q101-compliant power switching in 12 V vehicle architectures where thermal efficiency, manufacturability, and long-term reliability are critical.
FAQ
What is the maximum continuous drain current for BUK9M6R7-40HX under real-world PCB conditions?
The datasheet specifies 50 A continuous drain current at Tmb = 25 °C with ideal heatsinking. In actual designs, this is limited by PCB copper area, ambient temperature, and airflow. With 2 oz copper and 10 cm² thermal pad, expect 25–35 A continuous operation before exceeding 150 °C junction temperature.
Does BUK9M6R7-40HX require a gate driver IC for 3.3 V MCU control?
No. Its VGS(th) range (0.7–2.15 V at 25 °C) and logic-level enhancement allow direct drive from 3.3 V microcontroller GPIO pins. However, a 5 Ω series gate resistor is recommended to dampen ringing and limit peak gate current during fast switching.
How does the LFPAK33 package compare thermally to standard SO-8 for this MOSFET?
LFPAK33 delivers 2.09 K/W Rth(j-mb), nearly 3× better than SO-8's typical 6 K/W Rth(j-a). The exposed mounting base provides a low-impedance thermal path directly to the PCB copper pour, enabling >2× higher power dissipation in the same footprint without added heatsinks.
Is the source-drain diode suitable for freewheeling in a buck converter?
Yes-the diode is rated for 50 A continuous forward current and exhibits soft recovery (S = 0.6), minimizing voltage overshoot and EMI during reverse recovery. It is fully characterized for use in synchronous rectification and freewheeling paths in automotive DC-DC converters up to 500 kHz.
BUK9M6R7-40HX 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:
- 50A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 6.7mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.15V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 31 nC @ 10 V
- Vgs (Max):
- +16V, -10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2054 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 65W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK33
BUK9M6R7-40HX FAQ
1.How can I place an order for BUK9M6R7-40HX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9M6R7-40HX 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 BUK9M6R7-40HX reliable?
The price and inventory of BUK9M6R7-40HX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9M6R7-40HX is usually 5 days.
3.What payment methods are accepted for BUK9M6R7-40HX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9M6R7-40HX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK9M6R7-40HX?
BUK9M6R7-40HX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9M6R7-40HX 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 BUK9M6R7-40HX?
For technical support, including BUK9M6R7-40HX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9M6R7-40HX requirements.
6.How does Aetrix verify that BUK9M6R7-40HX is sourced from the original manufacturer or authorized distributors?
All BUK9M6R7-40HX 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 BUK9M6R7-40HX meets industry standards.
7.What is the process for return or replacement of BUK9M6R7-40HX?
All BUK9M6R7-40HX units undergo pre-shipment inspection (PSI). If there is an issue with BUK9M6R7-40HX, 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 BUK9M6R7-40HX part is unused and in its original packaging.
Return procedure for BUK9M6R7-40HX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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