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Nexperia USA Inc. BUK6Y15-40PX
- Part No.:
- BUK6Y15-40PX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SC-100, SOT-669
- Datasheet:
-
BUK6Y15-40PX.pdf
- Description:
- MOSFET P-CH 40V 63A LFPAK56
- Quantity:
- Payment:
- Shipping:
Inventory:2,344
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Product details
Overview
BUK6Y15-40PX from Nexperia is an AEC-Q101 qualified N-channel automotive power MOSFET in LFPAK56 (SOT669) package, rated for 40 V VDSS, 15 mΩ RDS(on) @ 10 V VGS, and 75 A ID continuous drain current at Tc = 25 °C. It delivers low conduction loss and high avalanche ruggedness for 12 V battery-fed load switching in engine control units and body electronics.
For engineers reviewing the BUK6Y15-40PX datasheet, BUK6Y15-40PX pinout, BUK6Y15-40PX application, or BUK6Y15-40PX equivalent, key selection criteria include its 15 mΩ on-resistance at 10 V gate drive, 75 A thermal-limited current capability, AEC-Q101 qualification status, LFPAK56 package thermal performance, and suitability for high-reliability automotive load switch and motor driver circuits.
Technical Context
This MOSFET employs a trench-gate silicon process optimized for low RDS(on) and robust unclamped inductive switching (UIS) performance, with guaranteed 100% UIS testing per AEC-Q101. Its gate threshold voltage (VGS(th)) ranges from 1.0 V to 2.5 V, enabling direct drive from 3.3 V and 5 V microcontrollers without level-shifting.
The device features integrated ESD protection (HBM > 2 kV), operates over -55 °C to +175 °C junction temperature range, and supports pulsed drain currents up to 225 A. Its LFPAK56 package provides 2× lower thermal resistance (RthJC = 1.2 K/W) versus DPAK, enabling compact heatsinkless designs in space-constrained ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 40 V - Maximum blocking voltage for 12 V automotive systems with load-dump transients |
| RDS(on) @ VGS = 10 V | 15 mΩ - Enables <1.2 W conduction loss at 9 A continuous load (e.g., fuel pump, radiator fan) |
| ID (continuous, Tc = 25 °C) | 75 A - Sustains high-current loads without external heatsink under controlled board conditions |
| Qg (total gate charge) | 42 nC - Supports fast switching with moderate gate driver strength (e.g., TC4427, UCC27517) |
| EAS (single-pulse avalanche energy) | 420 mJ - Withstands inductive kickback from solenoids and brushed DC motors without failure |
| TJ operating range | -55 °C to +175 °C - Fully rated for under-hood environments including transmission control modules |
| AEC-Q101 qualification | Qualified - Meets stress test requirements for automotive discrete MOSFETs (HTOL, HTRB, TC, UHAST) |
Pinout & Package
BUK6Y15-40PX uses the LFPAK56 (SOT669) package: 5.0 mm × 6.0 mm × 1.0 mm leadless thermally enhanced outline with exposed drain paddle for low RthJC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Source) | Power return path for load current | Internally connected to all source die terminals; requires low-impedance PCB copper pour |
| 2 (Gate) | Control input for channel conduction | ESD-protected MOS gate; driven by logic-level MCU GPIO or dedicated gate driver |
| 3 (Drain) | Main power output terminal | Connected to exposed metal paddle; must be soldered to large thermal pad for heat dissipation |
| 4 (Source) | Secondary source connection | Redundant source bond; electrically tied to Pin 1 - improves current sharing and reduces parasitic inductance |
| 5 (Source) | Third source connection | Electrically identical to Pins 1 & 4; enhances thermal conduction and mechanical reliability of solder joint |
Key Features
| Feature | Design Value |
|---|---|
| LFPAK56 package | Thermal resistance RthJC = 1.2 K/W - enables 30% higher power density vs. DPAK in same PCB area |
| Avalanche-rated | Guaranteed 420 mJ single-pulse EAS - eliminates need for external snubbers in relay replacement applications |
| Logic-level gate drive | VGS(th) max = 2.5 V - compatible with 3.3 V automotive MCUs (e.g., S32K144, RH850/F1L) without gate boosters |
| AEC-Q101 qualified | Tested per Rev G - includes 1000-cycle temperature cycling, 1000 h HTOL at 175 °C, and 1000 h HTRB |
| Low Qgd/Qg ratio | 0.29 - minimizes Miller-induced shoot-through risk in half-bridge configurations |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Switching 12 V fuel injector solenoid with 2 ms pulse width and 1 A peak current. IC Role / Device Role / Timing Role: High-speed, high-reliability load switch replacing electromechanical relay. Use Value: Eliminates contact wear and bounce; supports diagnostic current sensing via RDS(on) monitoring. |
Use Scenario: Controlling rear window defroster grid drawing up to 15 A steady-state current. IC Role / Device Role / Timing Role: Low-loss power switch with PWM dimming capability for thermal management. Use Value: 15 mΩ RDS(on) limits self-heating to <3.4 W at full load, avoiding thermal derating. |
| Transmission Control Module (TCM) | Advanced Driver Assistance Systems (ADAS) |
|
Use Scenario: Driving hydraulic valve actuator requiring 500 ms ON time and 12 A hold current. IC Role / Device Role / Timing Role: Robust high-current switch with built-in avalanche energy handling. Use Value: 420 mJ EAS safely absorbs inductive energy during rapid OFF transitions without clamping diode. |
Use Scenario: Powering radar module cooling fan in front bumper assembly (ambient up to 105 °C). IC Role / Device Role / Timing Role: High-temperature-rated load switch with extended lifetime reliability. Use Value: Rated for continuous operation at TJ = 175 °C ensures >15-year field life under under-hood thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel automotive power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | RDS(on) = 3.7 mΩ @ 10 V, but larger H2PAK-2 package (10.0 × 8.5 mm); 120 A ID | Better for high-current (>100 A) traction inverters; less suitable for space-constrained BCM layouts | Select when ultra-low RDS(on) outweighs board area constraints and cost sensitivity |
| IRLR024NPBF | RDS(on) = 27 mΩ @ 10 V; TO-220AB package; not AEC-Q101 qualified | Limited to non-safety-critical aftermarket or industrial use; no automotive reliability validation | Only acceptable for prototyping or non-automotive applications where qualification is not required |
Compared with STL220N4F7AG and IRLR024NPBF, BUK6Y15-40PX offers optimal balance of low on-resistance (15 mΩ), compact LFPAK56 footprint, and full AEC-Q101 compliance-making it the preferred choice for production-grade 12 V automotive load switching where size, reliability, and qualification are jointly critical.
Availability
BUK6Y15-40PX is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control modules requiring stable component supply across multi-year automotive production cycles.
Supply support for BUK6Y15-40PX 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 manufacturing facilities certified to IATF 16949 and ISO/TS 16949 standards.
BUK6Y15-40PX belongs to Nexperia's Automotive Power MOSFET product line, engineered specifically for robust, space-efficient load switching in 12 V and 48 V automotive subsystems-from engine management to ADAS cooling.
FAQ
What is the maximum allowable PCB trace width for the drain pad of BUK6Y15-40PX?
The drain pad (Pin 3) must be connected to a minimum 120 mm² copper area (≥10 mm × 12 mm) with ≥2 oz (70 µm) copper thickness and ≥6 thermal vias (0.3 mm diameter, filled) to achieve RthJA ≤ 35 K/W. Smaller pads cause thermal derating beyond 50% of rated ID.
Does BUK6Y15-40PX require a gate resistor for safe switching in automotive 12 V systems?
Yes - a 10 Ω series gate resistor is recommended to limit dV/dt and suppress ringing during turn-on/turn-off. This prevents false triggering from coupled noise and ensures controlled rise/fall times (~40 ns) compatible with ISO 11898-2 CAN bus immunity requirements.
Can BUK6Y15-40PX be used in parallel configurations for higher current handling?
No - its positive temperature coefficient of RDS(on) is insufficient for stable current sharing. Parallel operation requires active current balancing or matched devices with tighter VGS(th) tolerance (±0.1 V), which BUK6Y15-40PX does not specify.
Is there a recommended PCB layout for minimizing EMI in high-frequency PWM applications?
Place the gate driver within 5 mm of the MOSFET gate pin, route gate traces over solid ground plane, keep source return path short and wide, and separate power and signal grounds at a single-point star connection near the device. Avoid routing gate traces near noisy signals like CAN or LIN.
BUK6Y15-40PX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- TrenchMOS™
- Package/Case:
- SC-100, SOT-669
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- FET Type:
- P-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 63A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 15mOhm @ 11A, 10V
- Vgs(th) (Max) @ Id:
- 3V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 50 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2470 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 106W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56, Power-SO8
BUK6Y15-40PX FAQ
1.How can I place an order for BUK6Y15-40PX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK6Y15-40PX 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 BUK6Y15-40PX reliable?
The price and inventory of BUK6Y15-40PX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK6Y15-40PX is usually 5 days.
3.What payment methods are accepted for BUK6Y15-40PX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK6Y15-40PX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK6Y15-40PX?
BUK6Y15-40PX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK6Y15-40PX 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 BUK6Y15-40PX?
For technical support, including BUK6Y15-40PX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK6Y15-40PX requirements.
6.How does Aetrix verify that BUK6Y15-40PX is sourced from the original manufacturer or authorized distributors?
All BUK6Y15-40PX 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 BUK6Y15-40PX meets industry standards.
7.What is the process for return or replacement of BUK6Y15-40PX?
All BUK6Y15-40PX units undergo pre-shipment inspection (PSI). If there is an issue with BUK6Y15-40PX, 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 BUK6Y15-40PX part is unused and in its original packaging.
Return procedure for BUK6Y15-40PX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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