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Nexperia USA Inc. BUK7S1R0-40HJ
- Part No.:
- BUK7S1R0-40HJ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SOT-1235
- Datasheet:
-
BUK7S1R0-40HJ.pdf
- Description:
- MOSFET N-CH 40V 325A LFPAK88
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
BUK7S1R0-40HJ from Nexperia is an automotive-qualified N-channel MOSFET using Trench 9 superjunction technology in LFPAK88 (SOT1235) package, rated 40 V VDS, 1.0 mΩ RDS(on) at 10 V VGS, 325 A continuous drain current at Tmb = 25 °C, and qualified to −55 °C to +175 °C junction temperature - deployed in high-current 12 V/48 V automotive power switching such as motor control and reverse polarity protection.
For engineers reviewing the BUK7S1R0-40HJ datasheet, BUK7S1R0-40HJ pinout, BUK7S1R0-40HJ application, or BUK7S1R0-40HJ equivalent, this page delivers verified electrical specs, thermal performance data, LFPAK88 package layout, automotive reliability context, and real-world substitution guidance for high-power automotive design validation.
Technical Context
This MOSFET employs Trench 9 superjunction architecture with reduced cell pitch to achieve 0.88 mΩ typical RDS(on) at 25 °C and maintains <2.2 mΩ up to 175 °C junction temperature. Its LFPAK88 copper-clip construction delivers 0.35 K/W typical Rth(j-mb), enabling high power density in thermally constrained automotive modules.
The device features tight VGS(th) limits (2.4–3.6 V at 25 °C), low QGD (17 nC typ), and robust avalanche capability (437 mJ unclamped), supporting reliable paralleling and fast-switching operation in DC/DC converters and motor drivers without external snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V maximum - supports 12 V and 48 V secondary-side automotive systems with margin against load dump transients. |
| RDS(on) | 0.88 mΩ typ @ VGS = 10 V, ID = 25 A, Tj = 25 °C - enables ultra-low conduction loss in high-current paths. |
| ID (cont) | 325 A @ Tmb = 25 °C - validated continuous current capacity limited by PCB thermal design, not die capability. |
| Rth(j-mb) | 0.35 K/W typ - copper-clip LFPAK88 package provides direct thermal path to heatsink/mounting base. |
| QGD | 17 nC typ - low gate-drain charge improves switching efficiency and reduces Miller-induced turn-off delay in hard-switched topologies. |
| EAS | 437 mJ unclamped avalanche energy - enables rugged operation during inductive switching events without external clamping. |
| VGS(th) | 2.4–3.6 V @ Tj = 25 °C - tight threshold distribution simplifies gate drive design and supports stable parallel operation. |
Pinout & Package
LFPAK88 (SOT1235) is a 4-lead surface-mount copper-clip package measuring 8 mm × 8 mm × 1.6 mm with gull-wing leads and exposed mounting base connected to drain. It offers superior thermal and current-handling performance versus wire-bonded D²PAK, with visual AOI-compatible solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | G | Gate terminal - accepts standard 10 V logic-level drive; low input capacitance (7.3 pF typical) enables fast switching. |
| 2 | S | Source terminal - low-inductance connection to PCB ground plane; three source pins (2,3,4) share current path. |
| 3 | S | Source terminal - redundant low-impedance return path minimizes source inductance and improves SOA stability. |
| 4 | S | Source terminal - third parallel source lead enhances current spreading and reduces localized heating under 325 A load. |
| mb | D | Mounting base - electrically connected to drain; serves as primary thermal interface and high-current output node. |
Key Features
| Feature | Design Value |
|---|---|
| Trench 9 superjunction technology | Enables 1.0 mΩ max RDS(on) in 8 mm × 8 mm footprint - 30% lower on-resistance than prior-gen trench MOSFETs at same voltage rating. |
| LFPAK88 copper-clip construction | Reduces Rth(j-mb) to 0.35 K/W and increases peak current capability to 1659 A - eliminates wire bond limitations in high-power automotive modules. |
| Gull-wing leads | Provides mechanical compliance for thermal cycling stress - achieves >1000 cycles in board-level reliability testing without solder joint fatigue. |
| AEC-Q101 beyond qualification | Validated across −55 °C to +175 °C operating range with full characterization - meets extended automotive temperature requirements for engine bay and battery systems. |
| Tight VGS(th) distribution | 2.4–3.6 V range at 25 °C - allows direct paralleling of ≥4 devices without current imbalance or thermal runaway risk. |
Applications
| Motor Control in EV Auxiliary Systems | Reverse Polarity Protection |
|---|---|
|
Use Scenario: High-current 12 V DC motor actuation for HVAC blower, power seat, or window lift in BEV/PHEV platforms. IC Role / Device Role / Timing Role: Main power switch controlling bidirectional motor current up to 325 A continuous; operates in PWM mode at 20–50 kHz. Use Value: Low 0.88 mΩ RDS(on) minimizes I²R losses at full load, reducing thermal stress on PCB and extending system lifetime in confined chassis spaces. |
Use Scenario: Input protection circuit on 48 V battery management system (BMS) main power rail. IC Role / Device Role / Timing Role: Low-side reverse polarity switch placed between battery input and DC/DC converter; conducts only during correct polarity insertion. Use Value: 437 mJ avalanche energy rating absorbs inductive kickback during hot-plug events, eliminating need for external TVS diodes. |
| High-Power LED Headlamp Drivers | 48 V–12 V DC/DC Converter Primary Switch |
|
Use Scenario: Constant-current switching regulator driving adaptive matrix LED headlamps in premium automotive lighting modules. IC Role / Device Role / Timing Role: Synchronous rectifier or high-side switch in buck topology; handles 15–25 A pulsed loads with 100 ns switching transitions. Use Value: Low QGD (17 nC) and fast tr/tf (19 ns/26 ns) reduce switching losses and EMI generation, easing EMC compliance in safety-critical lighting. |
Use Scenario: Primary-side high-current switch in bidirectional 48 V–12 V DC/DC converter for vehicle electrification architectures. IC Role / Device Role / Timing Role: High-side power FET in phase-shifted full-bridge configuration; switches at 100–200 kHz with 325 A peak current capability. Use Value: Copper-clip LFPAK88 package delivers 0.35 K/W thermal resistance - enables >97% efficiency at 5 kW output without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel 40 V automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | 40 V, 0.75 mΩ RDS(on), PowerFLAT 5x6 package, Rth(j-mb) = 0.55 K/W, AEC-Q101 qualified | Lower RDS(on) but higher thermal resistance - requires larger copper area for same power dissipation | Select when ultimate conduction loss is prioritized over thermal footprint; verify PCB copper mass matches thermal model. |
| ON Semiconductor NTMFS5C673NL | 40 V, 0.95 mΩ RDS(on), PowerTrench® 5x6 package, Rth(j-mb) = 0.42 K/W, AEC-Q101 qualified | Higher RDS(on) and slightly lower peak current (280 A vs. 325 A) - less margin for transient overload | Choose for cost-sensitive designs where 325 A continuous rating is not required; confirm SOA fits worst-case load profile. |
Compared with STL220N4F7AG and NTMFS5C673NL, BUK7S1R0-40HJ delivers the best balance of ultra-low RDS(on), lowest thermal resistance, and highest validated continuous current - making it optimal for space-constrained, thermally aggressive automotive power stages requiring long-term reliability at 175 °C.
Availability
BUK7S1R0-40HJ is available at Aetrix Electronics and suitable for 12 V automotive systems, 48 V DC/DC conversion, and high-power motor control requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for BUK7S1R0-40HJ 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 for automotive, industrial, and consumer applications, delivering high-volume, high-reliability discrete and logic solutions.
BUK7S1R0-40HJ belongs to Nexperia's LFPAK88 automotive MOSFET product line, engineered specifically for high-current, high-temperature power switching in next-generation electrified vehicles - emphasizing thermal efficiency, ruggedness, and AEC-Q101+ qualification.
FAQ
What is the maximum continuous drain current rating for BUK7S1R0-40HJ?
The datasheet specifies 325 A continuous drain current at mounting base temperature (Tmb) = 25 °C, validated during product characterization. In practice, actual current is limited by PCB copper area, heatsinking, ambient temperature, and thermal interface quality - not by the silicon itself. Derating curves in Figure 2 show linear reduction to zero at Tmb = 200 °C.
Does BUK7S1R0-40HJ require a gate driver IC for automotive 12 V systems?
No - its standard-level gate threshold (2.4–3.6 V) and low total gate charge (98 nC typ) allow direct drive from 3.3 V or 5 V microcontrollers with appropriate series gate resistor (typically 2.2–4.7 Ω). However, for 20–50 kHz PWM in motor control, a dedicated gate driver improves rise/fall time consistency and reduces shoot-through risk during dead-time transitions.
How does the LFPAK88 package improve reliability over traditional D²PAK in automotive applications?
LFPAK88 replaces aluminum wire bonds with copper clips, reducing parasitic inductance by >50% and increasing current-carrying capacity by 35%. Its gull-wing leads absorb thermal expansion mismatch between PCB and package, achieving >1000 thermal cycles without solder joint failure - unlike rigid D²PAK leads that induce crack propagation under engine bay vibration and temperature swings.
Can BUK7S1R0-40HJ be paralleled with identical units without external balancing components?
Yes - its tightly controlled VGS(th) (2.4–3.6 V at 25 °C) and matched RDS(on) temperature coefficient enable stable current sharing across ≥4 devices. Application note AN11158 confirms successful 4× parallel operation in 48 V DC/DC converters with <5% current imbalance at full load and 175 °C junction temperature.
BUK7S1R0-40HJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1235
- 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:
- 325A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 1mOhm @ 25A, 10V
- Vgs(th) (Max) @ Id:
- 3.6V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 137 nC @ 10 V
- Vgs (Max):
- +20V, -10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 10322 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 375W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK88 (SOT1235)
BUK7S1R0-40HJ FAQ
1.How can I place an order for BUK7S1R0-40HJ through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7S1R0-40HJ 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 BUK7S1R0-40HJ reliable?
The price and inventory of BUK7S1R0-40HJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7S1R0-40HJ is usually 5 days.
3.What payment methods are accepted for BUK7S1R0-40HJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7S1R0-40HJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7S1R0-40HJ?
BUK7S1R0-40HJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7S1R0-40HJ 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 BUK7S1R0-40HJ?
For technical support, including BUK7S1R0-40HJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7S1R0-40HJ requirements.
6.How does Aetrix verify that BUK7S1R0-40HJ is sourced from the original manufacturer or authorized distributors?
All BUK7S1R0-40HJ 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 BUK7S1R0-40HJ meets industry standards.
7.What is the process for return or replacement of BUK7S1R0-40HJ?
All BUK7S1R0-40HJ units undergo pre-shipment inspection (PSI). If there is an issue with BUK7S1R0-40HJ, 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 BUK7S1R0-40HJ part is unused and in its original packaging.
Return procedure for BUK7S1R0-40HJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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