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Nexperia USA Inc. BUK9Y14-40B,115
- Part No.:
- BUK9Y14-40B,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SC-100, SOT-669
- Datasheet:
-
BUK9Y14-40B,115.pdf
- Description:
- MOSFET N-CH 40V 56A LFPAK56
- Quantity:
- Payment:
- Shipping:
Inventory:7,280
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Product details
Overview
BUK9Y14-40B,115 from Nexperia is a logic-level N-channel TrenchMOS FET in LFPAK (SOT669) package, designed for automotive critical systems. It delivers 56 A continuous drain current at 25 °C mounting base temperature, 12 mΩ RDS(on) at VGS = 5 V and Tj = 25 °C, and operates up to 175 °C junction temperature - enabling use in airbag actuators, ABS solenoid drivers, and diesel injection control.
For engineers reviewing the BUK9Y14-40B,115 datasheet, BUK9Y14-40B,115 pinout, BUK9Y14-40B,115 application, or BUK9Y14-40B,115 equivalent, key selection criteria include AEC-Q101 qualification, 40 V VDS rating, low 1.5 V typical gate threshold, thermal resistance of 1.8 K/W (junction-to-mounting base), and unclamped avalanche energy of 89 mJ.
Technical Context
This device uses Nexperia's High Performance Automotive (HPA) TrenchMOS technology to achieve low conduction losses and robust switching performance under thermally demanding conditions. Its logic-level gate drive compatibility (VGS(th) typ. 1.5 V at 25 °C) enables direct interfacing with 3.3 V/5 V microcontrollers without level-shifting circuitry.
The LFPAK package integrates a thermally optimized mounting base connected to the drain, delivering 1.8 K/W Rth(j-mb) and supporting high-power operation in space-constrained automotive modules. Avalanche ruggedness is validated per unclamped inductive switching tests (EDS(AL)S = 89 mJ), critical for solenoid and motor load interruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum drain-source blocking voltage compatible with 12 V/24 V automotive battery systems with transient margin. |
| RDS(on) | 12 mΩ @ VGS = 5 V, ID = 20 A, Tj = 25 °C - Enables <1.2 W conduction loss at 10 A, reducing thermal stress in compact modules. |
| ID (cont.) | 56 A @ Tmb = 25 °C - Supports high-current loads like fuel pump motors and transmission solenoids without external heatsinking. |
| Tj max | 175 °C - Qualified for under-hood applications where ambient temperatures exceed 125 °C. |
| EDS(AL)S | 89 mJ - Withstands single-pulse inductive energy from solenoid de-energization without failure. |
| Rth(j-mb) | 1.8 K/W - Enables efficient heat transfer to PCB copper or heatsink, critical for sustained high-current operation. |
| VGS(th) | 1.1–2.0 V @ Tj = 25 °C - Ensures reliable turn-on with standard logic-level MCU GPIOs and reduces gate drive power. |
Pinout & Package
BUK9Y14-40B,115 is housed in the SOT669 (LFPAK) plastic surface-mount package, featuring an exposed mounting base for enhanced thermal dissipation. The package has four terminals: pins 1–3 are internally shorted source connections, pin 4 is the gate, and the mounting base (mb) is electrically connected to the drain.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Source (S) | Three parallel source leads reduce bond wire inductance and improve current sharing in high-di/dt switching. |
| 4 | Gate (G) | Single gate input with 21 nC total gate charge - optimized for fast, low-loss switching with moderate gate driver strength. |
| Mounting base (mb) | Drain (D) | Exposed copper pad tied to drain; serves as primary thermal path and high-current drain connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive safety-critical applications including airbag deployment and ABS actuation. |
| Logic-level gate drive | VGS(th) ≤ 2.0 V ensures full enhancement with 3.3 V or 5 V microcontroller outputs - eliminates need for gate driver ICs. |
| 175 °C junction rating | Supports operation in high-ambient environments such as engine compartments and transmission control units. |
| Low RDS(on) × QG figure-of-merit | 12 mΩ × 21 nC = 252 mΩ·nC - balances conduction and switching losses for high-efficiency PWM control of inductive loads. |
| Unclamped avalanche rated | 89 mJ EDS(AL)S allows safe interruption of inductive currents without external snubbers in solenoid and motor drive circuits. |
Applications
| Automotive Airbag Deployment | ABS Solenoid Control |
|---|---|
Use Scenario: High-reliability triggering of pyrotechnic inflators during crash events. IC Role / Device Role / Timing Role: High-side switch controlling capacitor discharge into squib load with sub-100 μs turn-on. Use Value: AEC-Q101 qualification and 89 mJ avalanche capability ensure fail-safe operation under worst-case bus transients and thermal stress. | Use Scenario: Precise PWM control of hydraulic solenoid valves in anti-lock braking modules. IC Role / Device Role / Timing Role: Low-RDS(on) power switch enabling 1–10 kHz switching with minimal self-heating. Use Value: 12 mΩ on-resistance and 1.8 K/W thermal resistance maintain <85 °C junction rise at 20 A continuous, ensuring long-term reliability. |
| Diesel Fuel Injection | Transmission Actuator Drive |
Use Scenario: Driving high-current common-rail injector coils requiring fast, repeatable current pulses. IC Role / Device Role / Timing Role: Logic-level N-channel FET used in high-side configuration with external bootstrap or isolated gate drive. Use Value: 56 A continuous current rating and 226 A peak current support enable precise fuel metering across engine speed/load ranges. | Use Scenario: Controlling electromagnetic actuators in automatic transmission shift solenoids and clutch pressure control valves. IC Role / Device Role / Timing Role: Robust power switch handling repetitive inductive switching with integrated avalanche energy absorption. Use Value: 175 °C junction rating and thermal design allow stable operation in sealed transmission control modules with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel logic-level power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | 40 V VDS, 2.2 mΩ RDS(on) @ 10 V, but requires 10 V gate drive for optimal performance. | Higher efficiency at high gate voltage; unsuitable for direct 3.3 V MCU drive without level shift. | Select when system uses 10 V gate supply and prioritizes ultra-low conduction loss over gate drive simplicity. |
| IRL8721PBF | 30 V VDS, 13 mΩ RDS(on) @ 4.5 V, non-AEC-Q101 rated. | Limited to non-safety-critical 12 V systems; not qualified for airbag or ABS use. | Acceptable only for cost-sensitive industrial or consumer applications lacking automotive qualification requirements. |
Compared with STL220N4F7AG and IRL8721PBF, BUK9Y14-40B,115 uniquely combines AEC-Q101 qualification, 40 V rating, logic-level compatibility, and 175 °C operation - making it the only drop-in solution for thermally constrained, safety-critical automotive power switching.
Availability
BUK9Y14-40B,115 is available at Aetrix Electronics and suitable for automotive airbag systems, ABS control modules, and diesel injection systems requiring stable component supply across extended production lifecycles.
Supply support for BUK9Y14-40B,115 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 - high-volume, high-reliability devices for automotive, industrial, and computing applications.
BUK9Y14-40B,115 belongs to Nexperia's High Performance Automotive (HPA) TrenchMOS product line, engineered specifically for AEC-Q101-compliant power switching in safety-critical vehicle subsystems.
FAQ
Is BUK9Y14-40B,115 suitable for high-side switching configurations?
Yes - its logic-level gate threshold (1.1–2.0 V) and 40 V VDS rating support high-side use with appropriate gate driving (e.g., bootstrap or isolated driver). The mounting base is drain-connected, so PCB layout must isolate the drain pad from source-referenced ground planes.
What is the maximum continuous drain current at 100 °C mounting base temperature?
Per Figure 1 in the datasheet, the continuous drain current is derated to 40 A at Tmb = 100 °C. This reflects thermal limitations of the LFPAK package under reduced heat-sinking conditions, not device degradation.
Does BUK9Y14-40B,115 require external avalanche protection in solenoid drive circuits?
No - it is unclamped avalanche rated at 89 mJ (EDS(AL)S) under defined test conditions (ID = 56 A, Vsup ≤ 40 V, RGS = 50 Ω). This allows safe inductive load switching without snubber networks in properly designed layouts.
How does the LFPAK (SOT669) package improve thermal performance over standard SO-8?
The LFPAK exposes the drain-connected mounting base directly to the PCB, achieving 1.8 K/W Rth(j-mb) - ~3× better than SO-8's typical 5–6 K/W. This enables higher continuous current in the same footprint while reducing reliance on external heatsinks.
BUK9Y14-40B,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- TrenchMOS™
- Package/Case:
- SC-100, SOT-669
- 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:
- 56A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 5V
- Rds On (Max) @ Id, Vgs:
- 11mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 21 nC @ 5 V
- Vgs (Max):
- ±15V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1800 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 85W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56, Power-SO8
BUK9Y14-40B,115 FAQ
1.How can I place an order for BUK9Y14-40B,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9Y14-40B,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 BUK9Y14-40B,115 reliable?
The price and inventory of BUK9Y14-40B,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9Y14-40B,115 is usually 5 days.
3.What payment methods are accepted for BUK9Y14-40B,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9Y14-40B,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK9Y14-40B,115?
BUK9Y14-40B,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9Y14-40B,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 BUK9Y14-40B,115?
For technical support, including BUK9Y14-40B,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9Y14-40B,115 requirements.
6.How does Aetrix verify that BUK9Y14-40B,115 is sourced from the original manufacturer or authorized distributors?
All BUK9Y14-40B,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 BUK9Y14-40B,115 meets industry standards.
7.What is the process for return or replacement of BUK9Y14-40B,115?
All BUK9Y14-40B,115 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9Y14-40B,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 BUK9Y14-40B,115 part is unused and in its original packaging.
Return procedure for BUK9Y14-40B,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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