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Nexperia USA Inc. BUK7S2R0-40HJ
- Part No.:
- BUK7S2R0-40HJ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SOT-1235
- Datasheet:
-
BUK7S2R0-40HJ.pdf
- Description:
- BUK7S2R0-40H/SOT1235/LFPAK88
- Quantity:
- Payment:
- Shipping:
Inventory:8,387
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Product details
Overview
BUK7S2R0-40HJ from Nexperia is an automotive-qualified N-channel MOSFET using Trench 9 superjunction technology in LFPAK88 (SOT1235) package, rated 40 V VDS, 2 mΩ RDS(on) @ 10 V VGS, 190 A continuous drain current at Tmb = 25 °C, and qualified to −55 °C to +175 °C junction temperature for high-reliability 12 V/48 V automotive power switching.
For engineers reviewing the BUK7S2R0-40HJ datasheet, BUK7S2R0-40HJ pinout, BUK7S2R0-40HJ application, or BUK7S2R0-40HJ equivalent, this page delivers verified electrical specs, thermal performance data, LFPAK88 mounting base thermal resistance (0.72 K/W), avalanche energy rating (112 mJ), and real-world design context for motor control, reverse polarity protection, and DC/DC secondary-side switching.
Technical Context
This MOSFET implements a trench-gated superjunction structure optimized for low conduction loss and robust avalanche ruggedness. Its 2 mΩ typical RDS(on) at 25 °C and 3.55 mΩ at 175 °C enables high-efficiency power delivery in thermally constrained automotive environments.
The LFPAK88 copper-clip package provides low source inductance, 0.72 K/W junction-to-mounting-base thermal resistance, and gull-wing leads for mechanical stress absorption-critical for board-level reliability under thermal cycling in engine bay or ADAS modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum blocking voltage compatible with 12 V and 48 V automotive systems including load dump transients. |
| RDS(on) | 1.7 mΩ typ @ 10 V VGS, 25 °C - Enables <1.7 W conduction loss at 100 A, reducing heatsink requirements. |
| ID cont | 190 A @ Tmb = 25 °C - Validated continuous current capability; system-limited by PCB copper area and thermal interface. |
| EAS | 112 mJ - Non-repetitive avalanche energy rating supports robust operation during inductive turn-off events in solenoid/motor drives. |
| Rth(j-mb) | 0.72 K/W - Low thermal resistance from junction to mounting base enables direct thermal coupling to heatsinks or chassis. |
| QGD | 9 nC typ - Low gate-drain charge improves switching efficiency and reduces Miller-induced shoot-through risk in half-bridge topologies. |
| VGS(th) | 2.4–3.6 V @ 1 mA - Tight threshold distribution enables stable parallel operation without current imbalance. |
Pinout & Package
LFPAK88 (SOT1235) is a 4-lead, single-ended surface-mount copper-clip package measuring 8 mm × 8 mm × 1.6 mm with gull-wing leads and exposed mounting base electrically connected to the drain terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | G | Gate input - Controls channel conduction; requires 10 V drive for full RDS(on) performance. |
| 2 | S | Source node - Common return path; three parallel source terminals (pins 2–4) reduce parasitic inductance and improve current sharing. |
| 3 | S | Source node - Electrically tied to pins 2 and 4; enables low-inductance source connection for high di/dt switching. |
| 4 | S | Source node - Completes triple-source configuration; critical for minimizing source loop inductance in motor gate drivers. |
| Mounting Base | D | Drain terminal - Exposed copper pad on underside; must be soldered to PCB copper pour for thermal and electrical connection to drain net. |
Key Features
| Feature | Design Value |
|---|---|
| Trench 9 superjunction architecture | Enables 2 mΩ RDS(on) in 8 mm × 8 mm footprint-40% lower on-resistance than prior-gen TrenchMOS at same voltage rating. |
| LFPAK88 copper-clip construction | Reduces Rth(j-mb) to 0.72 K/W and increases peak current capability to 819 A (pulsed), outperforming wire-bond D²PAK in power density. |
| Gull-wing lead geometry | Provides mechanical compliance for >1000 thermal cycles between −40 °C and +125 °C, eliminating solder joint cracking in under-hood applications. |
| AEC-Q101 beyond qualification | Validated across −55 °C to +175 °C operating range with 100% avalanche testing-meets ASIL-B functional safety support requirements. |
| Tight VGS(th) distribution (2.4–3.6 V) | Allows direct paralleling of up to 4 devices without external current-sharing resistors in high-current battery disconnect circuits. |
Applications
| 12 V Automotive Load Switching | 48 V DC/DC Converter Secondary Side |
|---|---|
|
Use Scenario: High-side switching of HVAC blowers, seat heaters, and lighting modules in modern 12 V vehicle architectures. IC Role / Device Role / Timing Role: Power switch controlling load enable/disable with fast turn-on (<13 ns td(on)) and low conduction loss. Use Value: 190 A continuous rating supports multi-kW loads; triple-source pins minimize switching noise coupling into adjacent CAN/LIN buses. |
Use Scenario: Synchronous rectification on the 12 V output stage of 48 V–12 V bidirectional DC/DC converters for mild hybrid vehicles. IC Role / Device Role / Timing Role: Low-RDS(on) synchronous rectifier replacing Schottky diodes to improve conversion efficiency above 95%. Use Value: 2 mΩ RDS(on) cuts conduction losses by >60% vs. 5 mΩ alternatives, directly increasing fuel economy and reducing thermal management complexity. |
| High-Power Motor & Solenoid Control | Reverse Polarity Protection |
|
Use Scenario: H-bridge driver stage for EPS (Electric Power Steering) or active suspension actuators requiring >100 A peak current. IC Role / Device Role / Timing Role: Low-inductance N-channel switch enabling <30 ns turn-off delay and controlled di/dt for EMI reduction. Use Value: 819 A pulsed current rating and 112 mJ avalanche energy ensure safe operation during motor stall or short-circuit events without external clamping. |
Use Scenario: In-line reverse battery protection for infotainment head units, ADAS cameras, and telematics modules. IC Role / Device Role / Timing Role: Low-loss series pass element placed in high-side configuration with gate driven by charge pump. Use Value: 0.72 K/W thermal resistance allows full 190 A current handling with minimal voltage drop (≤380 mV @ 190 A), preserving system efficiency and cold-cranking margin. |
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, 1.8 mΩ RDS(on), PowerFLAT 5x6 package, Rth(j-mb) = 0.95 K/W, no mounting base drain connection. | Lacks integrated drain thermal path; requires separate drain thermal via design and cannot match BUK7S2R0-40HJ's 0.72 K/W cooling. | Select when board space is tighter (5x6 mm vs. 8x8 mm) and thermal budget allows higher Rth. |
| ON Semiconductor NTMFS6H800N | 40 V, 2.1 mΩ RDS(on), SO-8FL package, Rth(j-mb) = 1.2 K/W, rated to 175 °C but not AEC-Q101 beyond qualified. | Higher thermal resistance and narrower qualification scope limit use in under-hood locations exceeding 150 °C ambient. | Acceptable for cabin-mounted modules where ambient stays below 105 °C and peak current ≤150 A. |
Compared with STL220N4F7AG and NTMFS6H800N, BUK7S2R0-40HJ delivers superior thermal performance (0.72 K/W), verified beyond-AEC-Q101 reliability, and triple-source layout for lower EMI-making it the preferred choice for high-power, high-temperature automotive power stages where thermal headroom and long-term field reliability are non-negotiable.
Availability
BUK7S2R0-40HJ is available at Aetrix Electronics and suitable for 12 V automotive load switching, 48 V DC/DC converter secondary-side rectification, and high-power motor/solenoid control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BUK7S2R0-40HJ 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, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
BUK7S2R0-40HJ belongs to Nexperia's LFPAK88 automotive MOSFET product line, engineered specifically for high-current, high-temperature power switching in next-generation 12 V and 48 V vehicle electrical architectures.
FAQ
What is the maximum continuous drain current for BUK7S2R0-40HJ at 105 °C mounting base temperature?
At Tmb = 105 °C, the continuous drain current is derated to approximately 125 A, based on the normalized power dissipation curve (Fig. 2) and 183 W Ptot rating at 25 °C. This value assumes adequate PCB copper area (≥400 mm² per 1 oz copper layer) and thermal interface to maintain mounting base temperature.
Does BUK7S2R0-40HJ support paralleling, and what design considerations apply?
Yes-its tight VGS(th) range (2.4–3.6 V) and matched RDS(on) tracking over temperature enable stable paralleling. Key requirements include symmetrical gate drive routing, individual gate resistors (≤5 Ω), and shared source-plane layout to avoid current hogging; up to four devices have been validated in production battery disconnect modules.
How is the mounting base (drain) electrically and thermally connected in PCB layout?
The mounting base is the drain terminal and must be soldered to a dedicated, thermally robust PCB copper pour (minimum 400 mm² per layer, ≥2 oz copper) with ≥6 thermal vias (0.3 mm diameter, 0.8 mm pitch) connecting to internal ground or drain planes. No solder mask should cover the base area to ensure full thermal contact and electrical continuity.
What is the significance of the "beyond AEC-Q101" qualification for BUK7S2R0-40HJ?
"Beyond AEC-Q101" means the device exceeds standard automotive stress test requirements-including extended temperature cycling (−55 °C to +175 °C), 2000-hour HTGB, and 100% avalanche testing-validating suitability for ASIL-B–capable systems and harsh under-hood environments where junction temperatures routinely reach 175 °C.
BUK7S2R0-40HJ 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:
- 190A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 2mOhm @ 25A, 10V
- Vgs(th) (Max) @ Id:
- 3.6V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 70 nC @ 10 V
- Vgs (Max):
- +20V, -10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 5075 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 183W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK88 (SOT1235)
BUK7S2R0-40HJ FAQ
1.How can I place an order for BUK7S2R0-40HJ through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7S2R0-40HJ 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 BUK7S2R0-40HJ reliable?
The price and inventory of BUK7S2R0-40HJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7S2R0-40HJ is usually 5 days.
3.What payment methods are accepted for BUK7S2R0-40HJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7S2R0-40HJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7S2R0-40HJ?
BUK7S2R0-40HJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7S2R0-40HJ 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 BUK7S2R0-40HJ?
For technical support, including BUK7S2R0-40HJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7S2R0-40HJ requirements.
6.How does Aetrix verify that BUK7S2R0-40HJ is sourced from the original manufacturer or authorized distributors?
All BUK7S2R0-40HJ 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 BUK7S2R0-40HJ meets industry standards.
7.What is the process for return or replacement of BUK7S2R0-40HJ?
All BUK7S2R0-40HJ units undergo pre-shipment inspection (PSI). If there is an issue with BUK7S2R0-40HJ, 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 BUK7S2R0-40HJ part is unused and in its original packaging.
Return procedure for BUK7S2R0-40HJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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