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Nexperia USA Inc. BUK7Y38-100EX
- Part No.:
- BUK7Y38-100EX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SC-100, SOT-669
- Datasheet:
-
BUK7Y38-100EX.pdf
- Description:
- MOSFET N-CH 100V 30A LFPAK56
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
BUK7Y38-100EX from Nexperia is an AEC-Q101 qualified N-channel standard-level MOSFET in LFPAK56 (SOT669) package, rated for 100 V drain-source voltage, 38 mΩ RDS(on) at 10 VGS and 25 °C, and 175 °C junction temperature. It delivers 30 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 BUK7Y38-100EX datasheet, BUK7Y38-100EX pinout, BUK7Y38-100EX application, or BUK7Y38-100EX equivalent, key selection criteria include its Q101 qualification, repetitive avalanche rating, true standard-level gate (VGS(th) > 1 V at 175 °C), and thermal robustness in thermally demanding environments.
Technical Context
This MOSFET employs TrenchMOS technology and features a mounting base (mb) electrically connected to the drain, enabling low-inductance, high-current PCB mounting with direct thermal path to heatsink. Its gate threshold voltage remains functional up to 175 °C, ensuring reliable turn-on under extreme ambient conditions.
The device exhibits 11.3 nC gate-drain charge (QGD) and 30.9 nC total gate charge (QG(tot)) at VDS = 80 V, supporting fast switching with controlled dV/dt and reduced Miller-induced shoot-through risk in half-bridge configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 100 V - Maximum blocking voltage compatible with 48 V automotive bus transients per ISO 7637-2. |
| RDS(on) | 38 mΩ max at VGS = 10 V, ID = 5 A, Tj = 25 °C - Enables <1.9 W conduction loss at 7 A DC load. |
| ID (cont) | 30 A at Tmb = 25 °C - Supports high-current solenoid or motor drive without external heatsink at moderate ambient. |
| EAS | 45.2 mJ non-repetitive avalanche energy - Withstands unclamped inductive switching events in transmission control actuators. |
| Rth(j-mb) | 1.58 K/W - Enables ~60 W dissipation with 100 K rise from mounting base to junction at steady state. |
| QGD | 11.3 nC - Low Miller charge improves hard-switching efficiency and reduces gate driver stress in 100 kHz+ PWM applications. |
| VGS(th) | >1 V at Tj = 175 °C - Ensures guaranteed turn-on with standard 5 V or 3.3 V logic-level controllers under worst-case thermal stress. |
Pinout & Package
LFPAK56 (SOT669) is a 4-lead plastic surface-mount package with exposed copper mounting base for enhanced thermal and electrical performance. The base is internally connected to the drain terminal, enabling low-impedance power routing and direct PCB thermal coupling.
| 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 standard-level drive; no level-shifting required from MCU GPIO or automotive logic. |
| Mounting Base (mb) | Drain (D) | Exposed copper pad tied to drain - serves as primary current path and thermal interface; must be soldered to large copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability across temperature, humidity, and mechanical shock per JESD47. |
| Repetitive avalanche rated | Capable of sustained operation under repeated inductive energy dump (e.g., fuel injector coil flyback). |
| 175 °C maximum junction temperature | Enables placement near hot engine compartments without derating or forced cooling in 12 V/24 V systems. |
| True standard-level gate | VGS(th) > 1 V at 175 °C ensures turn-on margin with 3.3 V or 5 V microcontrollers even at peak thermal stress. |
| LFPAK56 thermal performance | 1.58 K/W Rth(j-mb) allows >60 W power handling with minimal PCB copper area vs. SO-8 or DPAK alternatives. |
Applications
| Engine Control Unit (ECU) Fuel Injector Driver | Automotive HVAC Blower Motor Controller |
|---|---|
|
Use Scenario: High-speed, high-current switching of 12 V fuel injectors with strict EMI and thermal constraints in under-hood ECU modules. IC Role / Device Role / Timing Role: Primary power switch in low-side driver configuration; handles 5–15 A pulsed loads at 1–10 Hz with <10 µs turn-off. Use Value: Repetitive avalanche rating absorbs inductive kickback without snubber; 175 °C rating avoids thermal shutdown during prolonged idling. |
Use Scenario: PWM-controlled 24 V blower motor in passenger cabin HVAC system, requiring silent operation and long-term reliability. IC Role / Device Role / Timing Role: Low-side switching element in H-bridge or single-phase inverter stage; operates at 20–25 kHz with 0–100% duty cycle. Use Value: 38 mΩ RDS(on) minimizes conduction loss at full speed (≈15 A), reducing heat generation and fan noise. |
| 48 V Mild Hybrid Starter-Generator Interface | Commercial Vehicle Transmission Solenoid Control |
|
Use Scenario: Bidirectional 48 V power path switching in 48 V mild hybrid architectures, interfacing starter-generator with battery and DC-DC converter. IC Role / Device Role / Timing Role: High-side or low-side switch in synchronous rectifier or isolation stage; subjected to load dump and reverse battery conditions. Use Value: 100 V VDS withstands ISO 16750-2 load dump transients up to +120 V; Q101 qualification ensures field longevity. |
Use Scenario: On/off control of hydraulic solenoids in heavy-duty truck automatic transmissions, operating continuously at elevated under-hood temperatures. IC Role / Device Role / Timing Role: Robust low-side driver replacing electromechanical relays; switched at ≤10 Hz with 100 ms on-time pulses. Use Value: 30 A continuous rating supports peak solenoid currents up to 25 A; 175 °C rating eliminates need for local airflow or heatsinks. |
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 |
|---|---|---|---|
| STL220N10F7 | 100 V, 2.2 mΩ RDS(on), 220 A pulse, PowerFLAT 5x6 package, 175 °C rated | Higher current density but requires gate driver due to logic-level (4.5 V) gate; not standard-level | Select when higher efficiency at >10 A and space-constrained layout justify added gate drive complexity. |
| IRF3205PBF | 55 V, 8 mΩ RDS(on), TO-220 package, 175 °C rated, not AEC-Q101 qualified | Limited to 12 V/24 V systems only; lacks automotive qualification and avalanche ruggedness | Acceptable for non-automotive industrial motor control where cost outweighs qualification requirements. |
Compared with STL220N10F7 and IRF3205PBF, BUK7Y38-100EX uniquely balances standard-level gate drive simplicity, AEC-Q101 compliance, and 100 V capability-making it optimal for cost-sensitive, thermally constrained automotive power stages where gate driver integration is undesirable.
Availability
BUK7Y38-100EX is available at Aetrix Electronics and suitable for automotive ECU design, 48 V mild hybrid subsystems, and commercial vehicle transmission control requiring stable component supply and long-term lifecycle support.
Supply support for BUK7Y38-100EX 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, logic, and MOSFET solutions, with leadership in automotive and industrial power management.
BUK7Y38-100EX belongs to Nexperia's AEC-Q101-qualified LFPAK MOSFET family, engineered specifically for thermally aggressive automotive power switching applications requiring robustness, low RDS(on), and simplified gate drive.
FAQ
Is BUK7Y38-100EX pin-compatible with other LFPAK56 MOSFETs?
Yes - BUK7Y38-100EX uses the standard SOT669 footprint with pins 1–3 as source, pin 4 as gate, and mounting base as drain. It shares identical land pattern and thermal pad layout with all Nexperia LFPAK56 N-channel devices, enabling drop-in replacement within same voltage/current class.
What is the maximum recommended PCB copper area for the mounting base?
Nexperia recommends ≥200 mm² of 2-oz copper connected directly to the mounting base via ≥6 thermal vias (0.3 mm diameter, spaced ≤1.5 mm apart). This achieves the specified 1.58 K/W Rth(j-mb) and supports full 95 W Ptot at Tmb = 25 °C.
Does BUK7Y38-100EX require a gate resistor for automotive PWM applications?
A gate resistor of 5–10 Ω is recommended to damp ringing and limit peak gate current during 10–100 kHz PWM. The device's 30.9 nC QG(tot) and 11.3 nC QGD make it sensitive to fast edge rates; proper gate resistance prevents overshoot and EMI in noisy automotive harness environments.
Can BUK7Y38-100EX be used in parallel configurations?
Yes - its positive temperature coefficient of RDS(on) (normalized factor increases with Tj, Fig. 12) enables inherent current sharing. Parallel operation requires matched layout symmetry, individual gate resistors, and shared mounting base thermal connection to avoid thermal runaway.
BUK7Y38-100EX 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):
- 100 V
- Current - Continuous Drain (Id) @ 25°C:
- 30A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 29mOhm @ 5A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 30.9 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1720 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 95W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56, Power-SO8
BUK7Y38-100EX FAQ
1.How can I place an order for BUK7Y38-100EX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7Y38-100EX 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 BUK7Y38-100EX reliable?
The price and inventory of BUK7Y38-100EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7Y38-100EX is usually 5 days.
3.What payment methods are accepted for BUK7Y38-100EX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7Y38-100EX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7Y38-100EX?
BUK7Y38-100EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7Y38-100EX 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 BUK7Y38-100EX?
For technical support, including BUK7Y38-100EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7Y38-100EX requirements.
6.How does Aetrix verify that BUK7Y38-100EX is sourced from the original manufacturer or authorized distributors?
All BUK7Y38-100EX 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 BUK7Y38-100EX meets industry standards.
7.What is the process for return or replacement of BUK7Y38-100EX?
All BUK7Y38-100EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7Y38-100EX, 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 BUK7Y38-100EX part is unused and in its original packaging.
Return procedure for BUK7Y38-100EX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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