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Nexperia USA Inc. BUK6D43-40PX
- Part No.:
- BUK6D43-40PX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
BUK6D43-40PX.pdf
- Description:
- MOSFET P-CH 40V 6A DFN2020MD-6
- Quantity:
- Payment:
- Shipping:
Inventory:889
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Product details
Overview
BUK6D43-40PX from Nexperia is a P-channel enhancement-mode Trench MOSFET in a DFN2020MD-6 (SOT1220) package, rated for −40 V drain-source voltage, 14 A continuous drain current at Tsp = 25 °C, and 30–43 mΩ RDS(on) at VGS = −10 V and Tj = 25 °C. It serves as a high-side load switch or relay driver in automotive power distribution modules.
For engineers reviewing the BUK6D43-40PX datasheet, BUK6D43-40PX pinout, BUK6D43-40PX application, or BUK6D43-40PX equivalent, this device is selected for compact, thermally efficient high-side switching where AEC-Q101 qualification, side-wettable flanks for solder inspection, and 175 °C junction operation are required.
Technical Context
This MOSFET uses Trench technology to achieve low on-resistance and fast switching with gate charge of 24–36 nC and turn-off delay of 35 ns. Its gate threshold voltage ranges from −1.4 V to −2.7 V at Tj = 25 °C, enabling robust logic-level drive compatibility with 3.3 V and 5 V controllers.
The device features an integrated source-drain diode with 15.6 ns reverse recovery time and 8 nC recovered charge, supporting synchronous rectification and inductive load commutation. Thermal resistance from junction to solder point is 6–10 K/W, optimized for PCB-mounted thermal relief via its exposed drain pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | −40 V - Maximum blocking voltage for 12 V automotive systems with load dump margin |
| RDS(on) | 30–43 mΩ @ VGS = −10 V, Tj = 25 °C - Enables <1 W conduction loss at 6 A load current |
| ID | −14 A @ VGS = −10 V, Tsp = 25 °C - Supports high-current loads such as fuel pump drivers or HVAC actuators |
| Ptot | 15 W @ Tsp = 25 °C - Sustains full-load operation with minimal heatsinking on 6 cm² FR4 copper pad |
| Tj max | 175 °C - Qualified for under-hood automotive environments per AEC-Q101 |
| QG(tot) | 24–36 nC - Enables fast switching with moderate gate driver strength (e.g., TC4427) |
| Rth(j-sp) | 6–10 K/W - Low thermal impedance to PCB solder point supports reliable power cycling |
Pinout & Package
DFN2020MD-6 (SOT1220) is a 2 mm × 2 mm × 0.65 mm leadless, thermally enhanced ultra-thin plastic package with side-wettable flanks for automated optical solder inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6, 7 | Drain (D) | Five parallel drain terminals connected to internal die drain metallization and exposed thermal pad - primary current path and thermal conduction path to PCB |
| 3 | Gate (G) | Control terminal requiring ≤20 V |VGS|; gate charge profile enables clean turn-on/turn-off with <36 nC total charge |
| 4, 8 | Source (S) | Two source terminals tied to internal source bond wires - forms return path for load current and reference for gate drive |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power stages |
| Side-wettable flanks | Enables 100% automated optical inspection (AOI) of solder joints without X-ray |
| Extended Tj range | Operates continuously up to 175 °C junction temperature - suitable for under-hood mounting |
| Trench MOSFET architecture | Delivers lower RDS(on) and higher figure-of-merit (RDS(on) × QG) than planar alternatives |
| Ultra-thin 0.65 mm profile | Reduces board stack height in space-constrained modules like ECU power supply units |
Applications
| Automotive High-Side Load Switch | Relay Replacement Circuit |
|---|---|
|
Use Scenario: Powering headlight modules or seat motor drivers from a 12 V battery rail with reverse polarity and load dump protection. IC Role / Device Role / Timing Role: High-side switch controlling load current flow; operates in linear or saturated mode depending on gate drive level. Use Value: Eliminates mechanical relay wear-out and bounce while supporting PWM dimming and diagnostics via current sensing through RDS(on). |
Use Scenario: Replacing electromechanical relays in door lock actuators or window lift controllers. IC Role / Device Role / Timing Role: Solid-state replacement for SPST/SPDT relay; driven by microcontroller GPIO with flyback diode integration. Use Value: Reduces system size, improves reliability over 100k cycles, and enables precise timing control with <35 ns turn-off delay. |
| High-Speed Line Driver | Industrial PLC Output Stage |
|
Use Scenario: Driving CAN bus termination or isolated I/O lines in automotive gateway ECUs. IC Role / Device Role / Timing Role: Fast-switching driver stage handling transient-heavy signal lines; used with external pull-up/pull-down networks. Use Value: 23 ns rise time and 14 ns fall time support >1 Mbps digital signaling with minimal overshoot in 50 Ω environments. |
Use Scenario: Output switching for 24 V DC industrial sensors and solenoid valves in programmable logic controllers. IC Role / Device Role / Timing Role: Final power stage interfacing controller logic to field-side loads; handles inductive kickback via integrated body diode. Use Value: 29.7 mJ unclamped avalanche energy rating allows safe operation during valve de-energization without external snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar P-channel high-side switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMT6009LPS-13 | RDS(on) = 9.5 mΩ @ −10 V but larger 3.3 mm × 3.3 mm SO-8 package; no side-wettable flanks | Better conduction efficiency but unsuitable for AOI-based automotive production lines | Select when thermal budget dominates footprint constraints and AEC-Q101 is not mandatory |
| IPB80P04P4L-04 | TO-263 package; RDS(on) = 3.8 mΩ @ −10 V; higher ID = −80 A; requires heatsink | Used in high-power battery disconnects; incompatible with DFN2020MD-6 footprint and reflow profile | Select only for >20 A applications where board area and assembly automation are secondary to current capacity |
Compared with DMT6009LPS-13 and IPB80P04P4L-04, BUK6D43-40PX uniquely balances AEC-Q101 compliance, side-wettable flanks for automotive manufacturing, and 2×2 mm footprint-making it optimal for space-constrained, high-reliability 12–24 V high-side switches.
Availability
BUK6D43-40PX is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and consumer appliance power management systems requiring stable component supply and long-term lifecycle assurance.
Supply support for BUK6D43-40PX 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 components and advanced packaging.
The BUK6D series targets automotive power switching applications, designed specifically for AEC-Q101 compliance, thermal robustness, and manufacturability in automated SMT lines using side-wettable flank inspection.
FAQ
What is the maximum gate-source voltage rating for BUK6D43-40PX?
The absolute maximum VGS is ±20 V, with recommended operating range limited to −10 V for reliable RDS(on) performance and gate oxide integrity. Exceeding −20 V risks permanent gate damage, while operation below −4.5 V increases RDS(on) to 45–70 mΩ, raising conduction losses significantly.
Does BUK6D43-40PX include an integrated body diode, and what are its key parameters?
Yes, it integrates a source-drain diode with typical forward voltage of −0.8 to −1.2 V at −2.3 A and 25 °C, reverse recovery time of 15.6 ns, and recovered charge of 8 nC. This enables inductive load freewheeling without external diodes in relay driver and motor control applications.
How does the DFN2020MD-6 package improve thermal performance compared to standard SO-8?
The DFN2020MD-6 exposes the drain pad directly to the PCB, achieving Rth(j-sp) of 6–10 K/W-up to 4× better than SO-8's typical 40 K/W junction-to-ambient. This allows 15 W dissipation on a 6 cm² copper pad versus ~2.3 W in free air, eliminating need for heatsinks in most automotive loads.
Is BUK6D43-40PX suitable for PWM-controlled LED lighting systems?
Yes-its 35 ns turn-off delay, 14 ns fall time, and 24–36 nC gate charge support clean 1–10 kHz PWM dimming without shoot-through or excessive switching loss. Combined with −40 V rating and 175 °C operation, it suits under-hood LED headlamp drivers with tight thermal envelopes.
BUK6D43-40PX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- P-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 6A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 43mOhm @ 6A, 10V
- Vgs(th) (Max) @ Id:
- 2.7V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 36 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1260 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 15W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN2020MD-6
BUK6D43-40PX FAQ
1.How can I place an order for BUK6D43-40PX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK6D43-40PX 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 BUK6D43-40PX reliable?
The price and inventory of BUK6D43-40PX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK6D43-40PX is usually 5 days.
3.What payment methods are accepted for BUK6D43-40PX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK6D43-40PX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK6D43-40PX?
BUK6D43-40PX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK6D43-40PX 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 BUK6D43-40PX?
For technical support, including BUK6D43-40PX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK6D43-40PX requirements.
6.How does Aetrix verify that BUK6D43-40PX is sourced from the original manufacturer or authorized distributors?
All BUK6D43-40PX 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 BUK6D43-40PX meets industry standards.
7.What is the process for return or replacement of BUK6D43-40PX?
All BUK6D43-40PX units undergo pre-shipment inspection (PSI). If there is an issue with BUK6D43-40PX, 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 BUK6D43-40PX part is unused and in its original packaging.
Return procedure for BUK6D43-40PX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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