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Nexperia USA Inc. BUK7Y18-75B,115
- Part No.:
- BUK7Y18-75B,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SC-100, SOT-669
- Datasheet:
-
BUK7Y18-75B,115.pdf
- Description:
- MOSFET N-CH 75V 49A LFPAK56
- Quantity:
- Payment:
- Shipping:
Inventory:10,540
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Product details
Overview
BUK7Y18-75B from Nexperia is an AEC-Q101 qualified N-channel TrenchMOS FET in LFPAK56 (SOT669) package, rated for 75 V VDS, 49 A continuous drain current at Tmb = 25 °C, and 175 °C junction temperature - designed for automotive power switching in engine management, transmission control, and 12–42 V DC loads.
For engineers reviewing the BUK7Y18-75B datasheet, BUK7Y18-75B pinout, BUK7Y18-75B application, or BUK7Y18-75B equivalent, this part supports standard-level gate drive (VGS(th) = 2–4 V), delivers 13.8 mΩ RDS(on) at 10 V/20 A/25 °C, and provides unclamped avalanche energy of 118 mJ - critical for robustness in automotive transients and motor commutation.
Technical Context
This MOSFET employs Nexperia's High-Performance Automotive (HPA) TrenchMOS technology to achieve low RDS(on) with high thermal resilience. Its 1.42 K/W Rth(j-mb) enables efficient heat transfer to the PCB mounting base, supporting operation up to 175 °C junction temperature without derating beyond Tmb = 100 °C.
The device features a source-connected triple-pin configuration (Pins 1–3), gate on Pin 4, and drain tied to the exposed mounting base - enabling high-current conduction paths and low-inductance layout. Avalanche ruggedness is characterized per IEC 60134 with defined single-pulse (118 mJ) and repetitive limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 75 V maximum - supports 42 V automotive systems with ≥1.8× safety margin against load-dump transients. |
| RDS(on) | 13.8 mΩ typical at VGS = 10 V, ID = 20 A, Tj = 25 °C - enables <1 W conduction loss at 40 A, reducing heatsink requirements. |
| ID (continuous) | 49 A at Tmb = 25 °C - sustains high-power solenoid or lamp loads without forced cooling. |
| EAS | 118 mJ non-repetitive avalanche energy - withstands inductive kickback from motors or relays without external snubbers. |
| QGD | 14.24 nC - balances switching speed and EMI; enables <50 ns turn-off delay with 10 Ω gate resistor. |
| Tj max | 175 °C - qualified per AEC-Q101 for under-hood applications including engine control modules. |
| Rth(j-mb) | 1.42 K/W - allows direct thermal coupling to copper pour, eliminating need for mechanical heatsinks in many 12–24 V designs. |
Pinout & Package
LFPAK56 (SOT669) plastic surface-mount package with exposed drain mounting base for enhanced thermal and current handling. Dimensions: 5.8 × 4.1 × 1.0 mm (L × W × H), 4 leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (S) | Source | Triple-source connection lowers parasitic inductance and resistance - improves di/dt capability and reduces voltage overshoot during switching. |
| 4 (G) | Gate | Single gate input optimized for standard 10 V logic-level drive; threshold voltage 2–4 V ensures reliable turn-on with microcontroller GPIO. |
| Mounting base (mb) | Drain | Exposed drain pad serves as primary current path and thermal interface - must be soldered to large copper area for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive safety-critical functions including engine management and transmission control - no additional qualification required for Tier-1 BOMs. |
| 175 °C junction rating | Enables operation in under-hood environments (e.g., near exhaust manifolds or turbochargers) without thermal shutdown or parameter drift. |
| Triple-source pinning | Reduces source inductance by >50% vs. SO-8 equivalents - suppresses oscillation and improves stability in high-frequency PWM motor drives. |
| Unclamped avalanche rating | 118 mJ energy absorption capacity - eliminates need for external clamping diodes in relay/motor driver circuits, simplifying layout and BOM. |
| Standard-level gate drive | Turns on fully with 10 V logic sources (e.g., MCU GPIO, automotive CAN/LIN transceivers) - avoids cost and complexity of level-shifters or gate drivers. |
Applications
| Engine Management Systems | Transmission Control Modules |
|---|---|
|
Use Scenario: Switching fuel injectors and ignition coils in gasoline/diesel ECUs under wide ambient temperature ranges (-40 °C to 150 °C). IC Role / Device Role / Timing Role: High-side or low-side power switch controlling inductive loads with fast turn-off to prevent coil saturation and ensure precise injection timing. Use Value: 118 mJ avalanche energy absorbs back-EMF without snubbers; 175 °C rating maintains reliability near hot engine blocks. |
Use Scenario: Driving solenoid valves and clutch actuators in automatic transmissions subjected to vibration, oil immersion, and thermal cycling. IC Role / Device Role / Timing Role: Robust power switch delivering pulsed 34.9 A peak current at 100 °C mounting base temperature for rapid gear engagement. Use Value: Triple-source pins minimize switching noise in noisy transmission ECU environments; AEC-Q101 ensures long-term field reliability. |
| DC-DC Converters (12/24 V) | Automotive Lighting & Lamp Drivers |
|
Use Scenario: Synchronous rectification in buck/boost converters powering ADAS cameras, infotainment, or body control modules. IC Role / Device Role / Timing Role: Low-RDS(on) synchronous FET replacing Schottky diodes to improve efficiency above 92% at 20 A output. Use Value: 13.8 mΩ RDS(on) cuts conduction loss by >60% vs. discrete diode solutions; LFPAK56 thermal performance sustains full load at 85 °C ambient. |
Use Scenario: PWM dimming and on/off control of LED headlamps, fog lamps, and interior lighting with overvoltage and short-circuit protection. IC Role / Device Role / Timing Role: Low-side switch managing up to 49 A lamp loads while surviving load-dump transients up to 75 V. Use Value: 75 V VDS rating exceeds ISO 7637-2 Pulse 5a (120 V transient); integrated body diode handles reverse recovery in PWM tail-light circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel automotive power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | 40 V VDS, 220 A ID, 0.75 mΩ RDS(on), PowerFLAT 5x6 package - higher current but lower voltage rating. | Restricted to 12 V systems only; unsuitable for 24/42 V or load-dump tolerant designs. | Select when ultra-low RDS(on) and high pulse current dominate over voltage margin and automotive qualification breadth. |
| ON Semiconductor NTMFS5C428NT1G | 40 V VDS, 120 A ID, 1.25 mΩ RDS(on), SO-8FL package - no AEC-Q101 certification, 150 °C Tj max. | Lacks automotive qualification; not approved for safety-critical engine/transmission use per OEM requirements. | Acceptable for non-safety automotive accessories (e.g., HVAC fans) where cost is prioritized over formal qualification. |
Compared with STL220N4F7AG and NTMFS5C428NT1G, BUK7Y18-75B uniquely combines 75 V rating, AEC-Q101 compliance, 175 °C operation, and triple-source LFPAK56 packaging - making it the only option qualified for 24/42 V engine control and transmission solenoid switching across global OEM platforms.
Availability
BUK7Y18-75B is available at Aetrix Electronics and suitable for automotive engine management, transmission control, and 12–42 V DC-DC converter designs requiring stable component supply, long lifecycle support, and zero-risk qualification reuse.
Supply support for BUK7Y18-75B 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 logic, discrete, and MOSFET solutions - spun off from Philips and now owned by Wingtech Technology.
BUK7Y18-75B belongs to Nexperia's High-Performance Automotive (HPA) TrenchMOS product line, engineered specifically for AEC-Q101-compliant power switching in harsh under-hood environments with emphasis on thermal resilience, avalanche robustness, and gate-drive simplicity.
FAQ
Is BUK7Y18-75B suitable for high-frequency PWM motor control?
Yes - with 14.24 nC QGD, 44.5 ns td(off), and 19.8 ns tf, it supports PWM frequencies up to 100 kHz in brushed DC motor drivers. Its triple-source pinning minimizes gate oscillation, and 1.42 K/W Rth(j-mb) prevents thermal runaway during sustained 20–40 A switching.
What is the maximum safe operating area (SOA) at 100 °C mounting base temperature?
At Tmb = 100 °C, continuous ID is 34.9 A (per Fig. 1), and the SOA curve (Fig. 4) confirms 30 A is sustainable at VDS = 30 V with 100 µs pulse width. Derating follows the normalized Ptot curve in Fig. 2, reaching ~55 W at 100 °C.
Does BUK7Y18-75B include an integrated body diode, and what are its recovery characteristics?
Yes - it features a monolithic source-drain body diode with VSD = 0.85–1.2 V at 25 A/25 °C and trr = 55.4 ns. Qr = 143 nC enables clean commutation in half-bridge configurations without external freewheeling diodes in most 12–24 V motor drives.
Can BUK7Y18-75B be used in parallel configurations for higher current handling?
Yes - its positive RDS(on) temperature coefficient (Fig. 12) ensures inherent current sharing. Parallel operation requires matched gate drive impedance and symmetrical PCB layout; Nexperia recommends ≤3 devices in parallel with individual 10 Ω gate resistors to avoid oscillation.
BUK7Y18-75B,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):
- 75 V
- Current - Continuous Drain (Id) @ 25°C:
- 49A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 18mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 35 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2173 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 105W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56, Power-SO8
BUK7Y18-75B,115 FAQ
1.How can I place an order for BUK7Y18-75B,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7Y18-75B,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 BUK7Y18-75B,115 reliable?
The price and inventory of BUK7Y18-75B,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7Y18-75B,115 is usually 5 days.
3.What payment methods are accepted for BUK7Y18-75B,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7Y18-75B,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7Y18-75B,115?
BUK7Y18-75B,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7Y18-75B,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 BUK7Y18-75B,115?
For technical support, including BUK7Y18-75B,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7Y18-75B,115 requirements.
6.How does Aetrix verify that BUK7Y18-75B,115 is sourced from the original manufacturer or authorized distributors?
All BUK7Y18-75B,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 BUK7Y18-75B,115 meets industry standards.
7.What is the process for return or replacement of BUK7Y18-75B,115?
All BUK7Y18-75B,115 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7Y18-75B,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 BUK7Y18-75B,115 part is unused and in its original packaging.
Return procedure for BUK7Y18-75B,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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