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Nexperia USA Inc. BUK9Y11-80EX
- Part No.:
- BUK9Y11-80EX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SC-100, SOT-669
- Datasheet:
-
BUK9Y11-80EX.pdf
- Description:
- MOSFET N-CH 80V 84A LFPAK56
- Quantity:
- Payment:
- Shipping:
Inventory:953
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Product details
Overview
BUK9Y11-80EX from Nexperia is an AEC-Q101 qualified N-channel logic-level MOSFET in LFPAK56 (SOT669) package, rated for 80 V VDS, 11 mΩ RDS(on) at VGS = 5 V and Tj = 25 °C, and 175 °C junction operation. It delivers 84 A continuous drain current at Tmb = 25 °C and supports ultra-high-performance power switching in automotive 12 V/24 V/48 V systems.
For engineers reviewing the BUK9Y11-80EX datasheet, BUK9Y11-80EX pinout, BUK9Y11-80EX application, or BUK9Y11-80EX equivalent, key selection factors include its true logic-level gate (VGS(th) > 0.5 V at 175 °C), repetitive avalanche rating, 0.77 K/W Rth(j-mb), and LFPAK56 thermal performance in thermally demanding environments.
Technical Context
This MOSFET employs TrenchMOS technology to achieve low on-resistance and fast switching with QGD = 13.2 nC and tf = 36 ns under standard test conditions. Its gate threshold voltage remains functional up to 175 °C, enabling reliable operation in engine bay and transmission control modules without gate drive boosting.
The device integrates a robust intrinsic body diode with VSD = 0.81 V at IS = 25 A and Tj = 25 °C, and is rated for non-repetitive avalanche energy EAS = 112.8 mJ - critical for inductive load switching in solenoid and motor control circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 80 V - Maximum drain-source blocking voltage compatible with 48 V automotive architectures and transient overvoltage tolerance. |
| RDS(on) | 8.1 mΩ (typ) at VGS = 5 V, ID = 25 A, Tj = 25 °C - Enables low conduction loss in high-current power switches. |
| ID (cont) | 84 A at Tmb = 25 °C - Supports high-power loads such as HVAC blowers and starter relays without external heatsinking. |
| Tj max | 175 °C - Qualified for under-hood applications including transmission control units and battery disconnect switches. |
| Rth(j-mb) | 0.77 K/W - Low thermal resistance enables efficient heat transfer to PCB copper or heatsink via mounting base (drain-connected). |
| QGD | 13.2 nC - Gate-drain charge directly impacts switching loss and EMI in PWM-driven loads like fuel injectors. |
| EAS | 112.8 mJ - Non-repetitive avalanche energy rating ensures ruggedness during inductive turn-off events in motor drives. |
Pinout & Package
LFPAK56 (SOT669) is a 4-lead surface-mount plastic package with exposed mounting base (drain-connected) for enhanced thermal and electrical performance. The package measures 5.8 × 4.1 mm with 1.27 mm lead pitch and supports high-current PCB layouts via solderable base plate.
| 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 switching. |
| 4 | Gate (G) | Single gate input optimized for 3.3 V/5 V logic-level drive; VGS(th) ≥ 0.5 V at 175 °C ensures turn-on margin across full temperature range. |
| Mounting Base | Drain (D) | Exposed copper pad electrically connected to drain; serves as primary thermal path and high-current return node. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use per stress test requirements including HTGB, HTRB, and temperature cycling - required for safety-critical ECUs. |
| Repetitive avalanche rated | Guaranteed capability to withstand repeated inductive energy spikes without degradation - essential for transmission solenoid drivers. |
| True logic-level gate | VGS(th) > 0.5 V at Tj = 175 °C ensures reliable turn-on with standard microcontroller GPIOs without level-shifting circuitry. |
| 175 °C junction rating | Enables placement in high-temperature zones (e.g., near engines or inverters) while maintaining parametric stability and lifetime reliability. |
| Low RDS(on) × QG figure of merit | Combines 8.1 mΩ on-resistance with 44.2 nC total gate charge - balances conduction and switching losses in 20–100 kHz PWM applications. |
Applications
| Engine Control Module (ECM) | Electric Power Steering (EPS) |
|---|---|
Use Scenario: High-side switching of fuel injector coils in gasoline direct injection systems. IC Role / Device Role / Timing Role: Power switch controlling coil energization timing with <1 µs turn-on delay and precise pulse-width modulation. Use Value: 13.2 nC QGD and 23 ns td(on) enable accurate 10–20 µs pulse widths at 100 kHz, minimizing fuel metering error. |
Use Scenario: Low-side driver for EPS motor phase windings in 48 V mild-hybrid architectures. IC Role / Device Role / Timing Role: Synchronous rectification switch handling bidirectional current up to 84 A peak during regenerative braking. Use Value: 0.77 K/W Rth(j-mb) and 175 °C rating sustain 100% duty cycle at 70 A with minimal derating on double-sided 2 oz copper PCB. |
| Automatic Transmission Control Unit (TCU) | 12 V Battery Disconnect Switch |
Use Scenario: Solenoid actuation for hydraulic pressure control in 8-speed automatic transmissions. IC Role / Device Role / Timing Role: High-reliability power switch driving inductive solenoids with repetitive 100 ms ON pulses and 1000+ cycles/hour. Use Value: Repetitive avalanche rating and 112.8 mJ EAS prevent failure during frequent inductive flyback events without snubber networks. |
Use Scenario: Main contactor replacement in 12 V battery management for start-stop and load-dump protection. IC Role / Device Role / Timing Role: Bidirectional isolation switch with integrated body diode supporting reverse-current fault clearing. Use Value: 0.81 V VSD at 25 A and 28 ns trr minimize conduction loss and reverse recovery oscillation during polarity reversal events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel logic-level MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N6F7 | 60 V VDS, 1.2 mΩ RDS(on), DFN5x6 package, no AEC-Q101 certification | Limited to 24 V systems; unsuitable for 48 V or high-temperature under-hood deployment | Select only for cost-sensitive industrial 24 V motor controls where automotive qualification is not required. |
| IRF1010E | 55 V VDS, 12 mΩ RDS(on), TO-220 package, 150 °C Tj max, non-logic-level (VGS(th) = 2–4 V) | Requires gate driver boost for 3.3 V MCU control; larger footprint and higher Rth(j-case) limits power density | Use only in legacy designs with existing TO-220 layout and 5 V gate drive infrastructure. |
Compared with STL220N6F7 and IRF1010E, BUK9Y11-80EX uniquely combines 80 V rating, AEC-Q101 compliance, true logic-level operation at 175 °C, and LFPAK56 thermal efficiency - making it the only drop-in solution for next-generation 48 V automotive power distribution and high-reliability solenoid/motor control.
Availability
BUK9Y11-80EX is available at Aetrix Electronics and suitable for automotive ECM, EPS, TCU, and battery disconnect applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for Tier-1 OEM programs.
Supply support for BUK9Y11-80EX 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-grade MOSFETs, ESD protection, and logic ICs.
BUK9Y11-80EX belongs to Nexperia's Automotive Logic-Level MOSFET product line, engineered specifically for thermally constrained, high-current automotive power switching where AEC-Q101 reliability and low-voltage gate drive are mandatory.
FAQ
Is BUK9Y11-80EX pin-compatible with other LFPAK56 MOSFETs?
Yes - BUK9Y11-80EX uses the standard SOT669 footprint with 1.27 mm pitch and identical 5.8 × 4.1 mm outline. Pin 1–3 are source, Pin 4 is gate, and the mounting base is drain. This matches all Nexperia LFPAK56 logic-level MOSFETs including BUK9Y87-80E and BUK9Y12-80E, enabling direct layout reuse.
What is the maximum PCB copper area recommended for optimal thermal performance?
For continuous 84 A operation at Tmb = 25 °C, Nexperia recommends ≥ 400 mm² of 2 oz copper connected to the mounting base via ≥ 6 thermal vias (0.3 mm diameter, 0.8 mm pitch). This achieves the specified 0.77 K/W Rth(j-mb) and prevents thermal runaway under sustained load.
Does BUK9Y11-80EX require a gate resistor for automotive EMI compliance?
Yes - a 5 Ω external gate resistor is specified in the datasheet for EMI testing (Fig. 4). This value damps ringing caused by QGD = 13.2 nC and parasitic inductance, ensuring CISPR 25 Class 5 radiated emissions compliance when switching 25 A loads at 20 kHz in EPS or ECM applications.
Can BUK9Y11-80EX replace older TO-220 MOSFETs in existing automotive designs?
Yes, with layout adaptation - its LFPAK56 footprint replaces TO-220 in space-constrained modules. Key advantages include 50% lower Rth(j-mb) than TO-220, elimination of mechanical mounting hardware, and compatibility with reflow soldering. Thermal simulation and board-level validation are required before qualification.
BUK9Y11-80EX 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):
- 80 V
- Current - Continuous Drain (Id) @ 25°C:
- 84A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 5V
- Rds On (Max) @ Id, Vgs:
- 10mOhm @ 25A, 10V
- Vgs(th) (Max) @ Id:
- 2.1V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 44.2 nC @ 5 V
- Vgs (Max):
- ±10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 6506 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 194W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56, Power-SO8
BUK9Y11-80EX FAQ
1.How can I place an order for BUK9Y11-80EX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9Y11-80EX 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 BUK9Y11-80EX reliable?
The price and inventory of BUK9Y11-80EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9Y11-80EX is usually 5 days.
3.What payment methods are accepted for BUK9Y11-80EX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9Y11-80EX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK9Y11-80EX?
BUK9Y11-80EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9Y11-80EX 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 BUK9Y11-80EX?
For technical support, including BUK9Y11-80EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9Y11-80EX requirements.
6.How does Aetrix verify that BUK9Y11-80EX is sourced from the original manufacturer or authorized distributors?
All BUK9Y11-80EX 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 BUK9Y11-80EX meets industry standards.
7.What is the process for return or replacement of BUK9Y11-80EX?
All BUK9Y11-80EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK9Y11-80EX, 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 BUK9Y11-80EX part is unused and in its original packaging.
Return procedure for BUK9Y11-80EX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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