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Nexperia USA Inc. BUK9K5R1-30EX
- Part No.:
- BUK9K5R1-30EX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-1205, 8-LFPAK56
- Datasheet:
-
BUK9K5R1-30EX.pdf
- Description:
- MOSFET 2N-CH 30V 40A LFPAK56D
- Quantity:
- Payment:
- Shipping:
Inventory:604
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Product details
Overview
BUK9K5R1-30EX from Nexperia is a dual N-channel logic-level MOSFET in LFPAK56D (SOT1205) package, rated for 30 V drain-source voltage, 5.3 mΩ RDS(on) at VGS = 5 V and Tj = 25 °C, and qualified to AEC-Q101 for automotive use. It delivers 40 A continuous drain current at Tmb = 25 °C and supports thermally demanding applications up to 175 °C junction temperature - deployed in transmission control and solenoid switching circuits.
For engineers reviewing the BUK9K5R1-30EX datasheet, BUK9K5R1-30EX pinout, BUK9K5R1-30EX application, or BUK9K5R1-30EX equivalent, key selection criteria include its dual-channel layout, true logic-level gate drive (VGS(th) > 0.5 V at 175 °C), repetitive avalanche rating, and 2.21 K/W junction-to-mounting-base thermal resistance - critical for high-reliability 12 V automotive power stages.
Technical Context
This device integrates two independent N-channel TrenchMOS transistors in a single LFPAK56D package with shared thermal path and isolated gate terminals. Each channel features matched static and dynamic characteristics: identical RDS(on) (4.2–5.3 mΩ typ/max), QGD (11 nC), and Ciss (2300–3065 pF) across temperature and bias conditions.
Its gate threshold voltage remains functional down to 0.5 V at 175 °C, enabling robust low-voltage drive from microcontrollers or ASICs in engine bay environments. The device supports pulsed peak drain current up to 329 A and non-repetitive avalanche energy of 214 mJ, making it suitable for inductive load switching with inherent fault tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 30 V maximum - defines safe operating voltage ceiling for 12 V automotive bus with surge margin |
| RDS(on) | 5.3 mΩ max at VGS = 5 V, ID = 10 A, Tj = 25 °C - enables <100 mW conduction loss at 40 A |
| ID | 40 A continuous at Tmb = 25 °C - limited by package thermal capability, not silicon |
| VGS(th) | >0.5 V at Tj = 175 °C - ensures reliable turn-on under worst-case hot-cranking conditions |
| Rth(j-mb) | 2.21 K/W - enables efficient heat transfer to PCB copper or heatsink, critical for compact motor drivers |
| EAS | 214 mJ non-repetitive avalanche energy - protects against inductive kickback in solenoid/lamp loads |
| QGD | 11 nC - determines switching speed and gate driver power requirement in PWM applications |
Pinout & Package
LFPAK56D (SOT1205) is a thermally enhanced surface-mount package with exposed mounting base, 8 leads, and dual-drain configuration optimized for high-current automotive power stages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S1 | Source terminal for FET1 - connects to low-side return path of first switched load |
| 2 | G1 | Gate terminal for FET1 - accepts logic-level drive (0–5 V or 0–10 V) with minimal external buffering |
| 3 | S2 | Source terminal for FET2 - electrically isolated from S1; enables independent load control |
| 4 | G2 | Gate terminal for FET2 - fully independent gate control allows asynchronous or complementary switching |
| 5, 6 | D2 | Drain terminals for FET2 - paralleled pins reduce inductance and improve current sharing in high-di/dt loads |
| 7, 8 | D1 | Drain terminals for FET1 - paralleled pins support high-current routing without trace bottlenecks |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per ISO 10605 |
| Repetitive avalanche rated | Withstands repeated inductive energy dumps without degradation - eliminates need for external snubbers in many cases |
| 175 °C junction rating | Enables operation in under-hood environments where ambient exceeds 125 °C, reducing derating overhead |
| True logic-level gate | VGS(th) > 0.5 V at 175 °C ensures turn-on even during cold-cranking voltage sag and high-temperature soak |
| Dual Power-SO8 footprint | LFPAK56D offers 3× lower Rth(j-mb) than standard SO8 - improves thermal headroom without redesigning PCB layout |
Applications
| Transmission Control Module | Motor Driver for HVAC Blower |
|---|---|
Use Scenario: High-side and low-side switching of electromagnetic shift solenoids in automatic transmission valve bodies. IC Role / Device Role / Timing Role: Dual N-channel MOSFET providing independent, fast-switching power paths for proportional pressure control valves. Use Value: Low RDS(on) minimizes self-heating during sustained 100% duty cycle; avalanche rating absorbs back-EMF from solenoid de-energization. |
Use Scenario: PWM-controlled DC brush motor driving cabin air blower in automotive HVAC systems. IC Role / Device Role / Timing Role: Half-bridge upper/lower switch enabling bidirectional speed and torque regulation via gate-timed commutation. Use Value: Matched channel parameters ensure symmetrical rise/fall times; 175 °C rating sustains performance during prolonged cabin heating cycles. |
| Lamp Load Management Unit | Engine Start/Stop Solenoid Interface |
Use Scenario: Solid-state replacement of mechanical relays controlling headlamps, fog lamps, and daytime running lights. IC Role / Device Role / Timing Role: Dual-channel load switch managing separate lamp circuits with diagnostic feedback via source sensing. Use Value: Integrated dual topology reduces component count vs. discrete MOSFETs; logic-level drive simplifies interface with body controller MCU. |
Use Scenario: High-current engagement/disengagement of starter motor solenoid during engine auto-stop and restart events. IC Role / Device Role / Timing Role: Robust power switch handling 300+ A inrush pulses while surviving repeated cold-cranking transients. Use Value: 329 A peak current rating and 214 mJ avalanche energy prevent failure during cranking voltage collapse and battery rebound spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N3LLH6 | 30 V, 2.2 mΩ RDS(on), 220 A peak, PowerFLAT 5x6 package - lower on-resistance but higher gate charge (45 nC) | Better conduction efficiency at high current; less suitable for high-frequency PWM due to slower switching | Prefer when minimizing I²R loss dominates over switching loss; requires stronger gate driver |
| ON Semiconductor NTMFS5C675NL | 30 V, 4.5 mΩ RDS(on), 100 A peak, SO-8FL package - no AEC-Q101 qualification, 150 °C max Tj | Lower cost for non-automotive industrial use; unsuitable for safety-critical or extended-temperature automotive deployment | Select only for commercial/industrial motor control where AEC-Q101 and 175 °C are not required |
Compared with STL220N3LLH6 and NTMFS5C675NL, BUK9K5R1-30EX uniquely balances AEC-Q101 compliance, 175 °C operation, and moderate gate charge (26.7 nC total) - making it optimal for space-constrained, thermally aggressive automotive modules requiring both reliability and controllability.
Availability
BUK9K5R1-30EX is available at Aetrix Electronics and suitable for automotive transmission control, HVAC motor drives, and lamp load management requiring stable component supply across multi-year vehicle production cycles.
Supply support for BUK9K5R1-30EX 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
BUK9K5R1-30EX belongs to Nexperia's Automotive Logic Level MOSFET product line, engineered specifically for robust, low-voltage-driven power switching in harsh under-hood environments where AEC-Q101 compliance and thermal resilience are mandatory.
FAQ
What is the maximum continuous drain current for BUK9K5R1-30EX at 100 °C mounting base temperature?
At Tmb = 100 °C and VGS = 5 V, the continuous drain current is rated at 40 A - same as at 25 °C - because current limitation is package-defined, not silicon-limited. Derating begins above 100 °C per Figure 2 in the datasheet, reaching ~25 A at Tmb = 150 °C.
Can BUK9K5R1-30EX be used in a synchronous buck converter topology?
No - BUK9K5R1-30EX lacks integrated body diode optimization for reverse recovery and has relatively high Qr (16.2 nC) and trr (25.8 ns), making it unsuitable for high-frequency synchronous rectification. It is designed for hard-switched load switching, not high-efficiency DC-DC conversion.
Is the LFPAK56D package lead-free and RoHS compliant?
Yes - the LFPAK56D package used for BUK9K5R1-30EX is lead-free, RoHS-compliant, and qualified to JEDEC J-STD-020 moisture sensitivity level 1 (MSL1), supporting standard reflow profiles up to 260 °C peak soldering temperature.
Does BUK9K5R1-30EX support parallel operation of its two channels for higher current?
No - the two channels share no internal thermal or electrical coupling beyond the common mounting base; they are fully independent. Parallel operation is not recommended unless externally balanced with individual gate resistors and current-sense feedback, as mismatched RDS(on) drift with temperature may cause current hogging.
BUK9K5R1-30EX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1205, 8-LFPAK56
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- MOSFET (Metal Oxide)
- Configuration:
- 2 N-Channel (Dual)
- FET Feature:
- Logic Level Gate
- Drain to Source Voltage (Vdss):
- 30V
- Current - Continuous Drain (Id) @ 25°C:
- 40A
- Rds On (Max) @ Id, Vgs:
- 5.3mOhm @ 10A, 5V
- Vgs(th) (Max) @ Id:
- 2.1V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 26.7nC @ 5V
- Input Capacitance (Ciss) (Max) @ Vds:
- 3065pF @ 25V
- Power - Max:
- 68W
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56D
BUK9K5R1-30EX FAQ
1.How can I place an order for BUK9K5R1-30EX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9K5R1-30EX 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 BUK9K5R1-30EX reliable?
The price and inventory of BUK9K5R1-30EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9K5R1-30EX is usually 5 days.
3.What payment methods are accepted for BUK9K5R1-30EX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9K5R1-30EX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK9K5R1-30EX?
BUK9K5R1-30EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9K5R1-30EX 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 BUK9K5R1-30EX?
For technical support, including BUK9K5R1-30EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9K5R1-30EX requirements.
6.How does Aetrix verify that BUK9K5R1-30EX is sourced from the original manufacturer or authorized distributors?
All BUK9K5R1-30EX 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 BUK9K5R1-30EX meets industry standards.
7.What is the process for return or replacement of BUK9K5R1-30EX?
All BUK9K5R1-30EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK9K5R1-30EX, 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 BUK9K5R1-30EX part is unused and in its original packaging.
Return procedure for BUK9K5R1-30EX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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