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Nexperia USA Inc. BUK7Y1R7-40HX
- Part No.:
- BUK7Y1R7-40HX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SC-100, SOT-669
- Datasheet:
-
BUK7Y1R7-40HX.pdf
- Description:
- MOSFET N-CH 40V 120A LFPAK56
- Quantity:
- Payment:
- Shipping:
Inventory:2,768
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Product details
Overview
BUK7Y1R7-40HX from Nexperia is an AEC-Q101 qualified N-channel Trench 9 superjunction MOSFET rated for 40 V VDS, 1.7 mΩ RDS(on) at 10 V VGS, 120 A continuous drain current, and 175 °C junction temperature - deployed in automotive 12 V power switching for motor, lamp, and solenoid control.
For engineers reviewing the BUK7Y1R7-40HX datasheet, BUK7Y1R7-40HX pinout, BUK7Y1R7-40HX application, or BUK7Y1R7-40HX equivalent, key selection criteria include RDS(on) stability over temperature, avalanche ruggedness (158 mJ), LFPAK56 thermal resistance (0.39 K/W), and gate charge profile (QG(tot) = 56–96 nC) for high-frequency PWM drive in start-stop micro-hybrid systems.
Technical Context
This MOSFET employs Trench 9 superjunction architecture to achieve sub-2 mΩ on-resistance in the LFPAK56 (SOT669) package, enabling higher power density than conventional TrenchMOS while improving SOA and unclamped avalanche capability. Its tight VGS(th) distribution (2.4–3.6 V at 25 °C) supports reliable parallel operation without current imbalance.
The integrated mounting base (drain-connected) and copper clip construction reduce both Rth(j-mb) and RDS(on), while gull-wing leads ensure board-level reliability under thermal cycling. Dynamic parameters - including QGD = 10–25 nC and Ciss = 4095–6142 pF - are optimized for fast, low-loss switching in 12 V automotive loads with minimal gate drive loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum drain-source blocking voltage compatible with 12 V automotive battery transients up to ISO 7637-2 Pulse 5a. |
| RDS(on) | 1.35 mΩ typ @ 10 V VGS, 25 °C - Enables <1.4 W conduction loss at 60 A, critical for thermally constrained engine bay modules. |
| ID | 120 A @ Tmb = 25 °C - Continuous current rating validated with PCB thermal design; limited by mounting base temperature in real applications. |
| EAS | 158 mJ - Single-pulse avalanche energy at Tj(init) = 25 °C - Supports robust operation during inductive load turn-off without external snubbers. |
| Rth(j-mb) | 0.39 K/W typ - Junction-to-mounting-base thermal resistance enables >200 W dissipation with 80 K ΔT, reducing heatsink requirements. |
| QG(tot) | 56–96 nC - Total gate charge determines gate driver sizing; low QGD/QG ratio improves hard-switching efficiency. |
| VGS(th) | 2.4–3.6 V @ 25 °C - Tight threshold spread allows stable paralleling of multiple devices without current hogging. |
Pinout & Package
Supplied in LFPAK56 (SOT669) - a 4-terminal, single-ended surface-mount plastic package with exposed copper mounting base (drain-connected) and gull-wing leads for AOI-compatible soldering and mechanical stress relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Source (S) | Three parallel source terminals reduce source inductance and improve current sharing in high-di/dt switching. |
| 4 | Gate (G) | Single gate input with 0.4–2.5 Ω internal gate resistance - compatible with standard 5 V/10 V logic-level drivers. |
| Mounting Base (mb) | 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 | Fully qualified for automotive use with 175 °C Tj rating - meets reliability requirements for under-hood ECUs and body control modules. |
| Trench 9 superjunction technology | Reduces RDS(on) by ~30% vs. prior-generation TrenchMOS in same footprint - increases power density without package change. |
| LFPAK copper clip construction | Lowers RDS(on) and Rth(j-mb) simultaneously - delivers 294 W Ptot at Tmb = 25 °C with improved current spreading. |
| Gull-wing lead form | Enables visual (AOI) solder inspection and superior mechanical joint integrity during thermal cycling - eliminates need for X-ray. |
| Tight VGS(th) limits | ±0.3 V tolerance at 25 °C - ensures predictable turn-on behavior and simplifies gate drive design for paralleled configurations. |
Applications
| Motor Control | Lamp & Solenoid Drive |
|---|---|
|
Use Scenario: High-side switching of brushed DC motors in HVAC actuators and seat positioners. IC Role / Device Role / Timing Role: Power switch controlling bidirectional motor current via H-bridge configuration with fast turn-off (tf = 16.6 ns) to minimize shoot-through risk. Use Value: Low RDS(on) reduces I²R heating at 30–50 A peak, while 158 mJ avalanche rating absorbs inductive kickback without clamping diodes. |
Use Scenario: PWM dimming of LED headlamps and activation of fuel injectors/solenoid valves. IC Role / Device Role / Timing Role: Low-side switch operating at 1–20 kHz with precise duty-cycle control enabled by stable VGS(th) and low QG. Use Value: 1.35 mΩ RDS(on) minimizes conduction loss at 10–25 A, and soft reverse recovery (S = 0.8) suppresses EMI during diode commutation. |
| Start-Stop Micro-Hybrid | Transmission Control |
|
Use Scenario: Starter motor engagement/disengagement and 12 V battery load management during engine restart. IC Role / Device Role / Timing Role: High-current power switch handling 120 A pulses with <10 µs turn-on delay (td(on) = 14.6 ns) for rapid response. Use Value: 600 A peak current rating and robust thermal design (0.39 K/W) sustain repeated high-power bursts without thermal runaway. |
Use Scenario: Clutch and shift solenoid actuation in automatic transmissions requiring precise current regulation. IC Role / Device Role / Timing Role: Current-controlled switch using analog feedback; leverages tight VGS(th) and linear region stability for accurate current mirroring. Use Value: Sub-1 mΩ RDS(on) drift over temperature (1.86 mΩ @ 175 °C) maintains consistent current delivery across full operating range. |
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 |
|---|---|---|---|
| STL220N4F7AG | 40 V, 1.65 mΩ RDS(on), PowerFLAT 5x6 package, Rth(j-mb) = 0.55 K/W, QG(tot) = 105 nC | Higher gate charge increases driver loss; larger thermal resistance requires more aggressive heatsinking. | Preferred where PCB layout favors 5x6 mm footprint and lower cost outweighs thermal performance trade-off. |
| ON Semiconductor NTMFS4C09NT1G | 40 V, 1.45 mΩ RDS(on), SO-8FL package, Rth(j-mb) = 0.45 K/W, QG(tot) = 72 nC | Slightly lower RDS(on) but no AEC-Q101 documentation publicly available; SO-8FL lacks mounting base copper clip. | Consider only for non-automotive industrial use; not recommended for safety-critical or AEC-compliant designs. |
Compared with STL220N4F7AG and NTMFS4C09NT1G, BUK7Y1R7-40HX delivers superior thermal performance (0.39 K/W), verified AEC-Q101 compliance, and optimized dynamic characteristics for high-reliability automotive switching - making it the preferred choice for start-stop systems and transmission control where junction temperature stability and avalanche robustness are critical.
Availability
BUK7Y1R7-40HX is available at Aetrix Electronics and suitable for automotive motor control, start-stop micro-hybrid systems, and transmission solenoid actuation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BUK7Y1R7-40HX 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 - delivering high-performance, reliable components for automotive, industrial, and consumer markets with emphasis on efficiency and miniaturization.
BUK7Y1R7-40HX belongs to Nexperia's LFPAK automotive MOSFET product line, engineered specifically for high-current, high-temperature 12 V automotive power switching with enhanced ruggedness and board-level reliability.
FAQ
What is the maximum continuous drain current for BUK7Y1R7-40HX at 105 °C mounting base temperature?
At Tmb = 105 °C, the normalized power derating curve (Figure 1) shows ~55% Ptot retention, reducing the effective continuous ID to approximately 85 A - assuming PCB thermal design sustains that mounting base temperature under steady-state conditions.
Does BUK7Y1R7-40HX require a gate resistor for automotive PWM applications?
Yes - a 5–10 Ω external gate resistor is recommended to damp ringing and control dV/dt during switching; internal RG (0.4–2.5 Ω) alone is insufficient to prevent oscillation with typical gate drivers and PCB parasitics in 12 V automotive harness environments.
How does the LFPAK56 package improve reliability versus standard SO-8 packages?
LFPAK56 replaces wire bonds with a copper clip connecting die to mounting base, cutting RDS(on) and Rth(j-mb) while eliminating bond-wire fatigue failure modes; its gull-wing leads also absorb thermal stress better than J-leads or QFN pads during automotive thermal cycling.
Can BUK7Y1R7-40HX be used in synchronous rectification topologies?
No - it is a standard-level (not logic-level) MOSFET with VGS(th) starting at 2.4 V; synchronous rectifier operation in 12 V systems typically requires ≤2.0 V threshold devices to ensure reliable turn-on with low forward voltage drop across the body diode.
BUK7Y1R7-40HX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- 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:
- 120A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 1.7mOhm @ 25A, 10V
- Vgs(th) (Max) @ Id:
- 3.6V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 96 nC @ 10 V
- Vgs (Max):
- +20V, -10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 6142 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 294W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56, Power-SO8
BUK7Y1R7-40HX FAQ
1.How can I place an order for BUK7Y1R7-40HX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7Y1R7-40HX 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 BUK7Y1R7-40HX reliable?
The price and inventory of BUK7Y1R7-40HX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7Y1R7-40HX is usually 5 days.
3.What payment methods are accepted for BUK7Y1R7-40HX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7Y1R7-40HX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7Y1R7-40HX?
BUK7Y1R7-40HX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7Y1R7-40HX 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 BUK7Y1R7-40HX?
For technical support, including BUK7Y1R7-40HX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7Y1R7-40HX requirements.
6.How does Aetrix verify that BUK7Y1R7-40HX is sourced from the original manufacturer or authorized distributors?
All BUK7Y1R7-40HX 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 BUK7Y1R7-40HX meets industry standards.
7.What is the process for return or replacement of BUK7Y1R7-40HX?
All BUK7Y1R7-40HX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7Y1R7-40HX, 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 BUK7Y1R7-40HX part is unused and in its original packaging.
Return procedure for BUK7Y1R7-40HX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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