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Nexperia USA Inc. BUK9K29-100E/1X
- Part No.:
- BUK9K29-100E/1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-1205, 8-LFPAK56
- Datasheet:
-
BUK9K29-100E/1X.pdf
- Description:
- MOSFET 100V 30A LFPAK56D
- Quantity:
- Payment:
- Shipping:
Inventory:5,778
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Product details
Overview
BUK9K29-100E from Nexperia is a dual N-channel TrenchMOS logic-level power MOSFET in LFPAK56D (SOT1205) package, qualified to AEC-Q101 for automotive use. It delivers 100 V VDS, 30 A continuous drain current at 25 °C mounting base temperature, and 25.1 mΩ RDS(on) at VGS = 5 V and Tj = 25 °C, enabling high-efficiency 12 V system switching in thermally demanding environments up to 175 °C junction temperature.
For engineers reviewing the BUK9K29-100E datasheet, BUK9K29-100E pinout, BUK9K29-100E application, or BUK9K29-100E equivalent, this device supports critical automotive functions including start-stop micro-hybrid control, transmission actuation, and high-reliability lamp/motor drive-where repetitive avalanche rating, true logic-level gate drive (VGS(th) > 0.5 V @ 175 °C), and low thermal resistance (Rth(j-mb) = 2.21 K/W) are essential selection criteria.
Technical Context
This dual MOSFET integrates two independent N-channel channels in a single LFPAK56D package, sharing no internal connection between FET1 and FET2-each with dedicated source, gate, and drain terminals. Its TrenchMOS architecture enables low RDS(on) while maintaining robustness against voltage transients via 83 mJ non-repetitive avalanche energy rating at ID = 30 A.
The device operates with a true logic-level gate threshold: VGS(th) remains functional down to 0.5 V at 175 °C, ensuring reliable turn-on with standard 5 V microcontroller outputs even under extreme thermal stress. Gate charge parameters (QG(tot) = 54 nC, QGD = 10.9 nC) support fast, controlled switching in high-frequency power stages without excessive driver loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 100 V - Maximum blocking voltage compatible with 12 V automotive battery systems with load-dump surge margin. |
| ID (continuous) | 30 A @ Tmb = 25 °C - Sustained current capability for high-power solenoid or motor loads without forced cooling. |
| RDS(on) | 25.1 mΩ @ VGS = 5 V, Tj = 25 °C - Low conduction loss enabling <1 W dissipation at 20 A, reducing heatsink requirements. |
| QG(tot) | 54 nC - Total gate charge determining driver strength needed for <100 ns switching transitions at 10 A load. |
| Tj max | 175 °C - Junction temperature limit enabling operation in engine bay or transmission control modules without derating. |
| EAS | 83 mJ - Single-pulse avalanche energy allowing safe clamping of inductive kickback from 30 A solenoids or motors. |
| Rth(j-mb) | 2.21 K/W - Thermal resistance from junction to mounting base, enabling 30 W dissipation with only ~66 °C temperature rise above PCB copper. |
Pinout & Package
Package: LFPAK56D (SOT1205), 8-lead plastic surface-mount package with exposed copper mounting base for enhanced thermal performance and mechanical robustness in automotive vibration environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S1 | Source terminal for FET1 - electrically isolated from S2; connects to low-side return path of first switched load. |
| 2 | G1 | Gate terminal for FET1 - requires 5 V logic-compatible drive; decoupling capacitor placement critical near this pin. |
| 3 | S2 | Source terminal for FET2 - independent of S1; enables dual low-side switching with separate ground returns. |
| 4 | G2 | Gate terminal for FET2 - fully isolated gate control allows asynchronous or phase-shifted switching of second load. |
| 5, 6 | D2 | Drain terminals for FET2 - paralleled pins (5 & 6) reduce inductance and current density in high-current drain paths. |
| 7, 8 | D1 | Drain terminals for FET1 - paralleled pins (7 & 8) provide low-inductance, high-current connection to power rail. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability across -55 °C to 175 °C, including temperature cycling, humidity, and mechanical shock testing. |
| Repetitive avalanche rated | Capable of repeated inductive energy clamping without degradation-critical for transmission solenoid drivers with frequent on/off cycles. |
| True logic-level gate | VGS(th) > 0.5 V at 175 °C ensures guaranteed turn-on using standard 5 V MCU GPIOs even at maximum operating temperature. |
| 175 °C junction rating | Enables direct placement in high-temperature zones (e.g., near engines or transmissions) without external thermal derating. |
| Low Rth(j-mb) | 2.21 K/W thermal resistance allows efficient heat transfer to PCB copper pour or heatsink, minimizing thermal interface complexity. |
Applications
| Start-Stop Micro-Hybrid Control | Transmission Solenoid Actuation |
|---|---|
|
Use Scenario: Managing battery disconnect and starter motor engagement during engine auto-stop/start cycles in 12 V mild hybrid vehicles. IC Role / Device Role / Timing Role: Dual low-side switch controlling high-current starter relay coil and battery isolation contactor independently. Use Value: Repetitive avalanche rating absorbs inductive spikes from relay coils; 175 °C rating sustains operation near hot engine blocks without thermal shutdown. |
Use Scenario: Driving multiple hydraulic solenoids in automatic transmission valve bodies requiring precise, fast-acting current control. IC Role / Device Role / Timing Role: Dual-channel power switch delivering pulsed 20–30 A currents to solenoids with sub-100 ns switching for pressure modulation accuracy. Use Value: Matched RDS(on) between FET1/FET2 ensures balanced current sharing; low QGD minimizes Miller-induced shoot-through risk during PWM. |
| 12 V Automotive Lamp Driver | Electric Power Steering (EPS) Motor Phase Switch |
|
Use Scenario: High-side or low-side switching of LED headlamps, fog lamps, and interior lighting with PWM dimming and short-circuit protection. IC Role / Device Role / Timing Role: Low-side switch handling up to 30 A peak current per channel for multi-lamp clusters with thermal foldback. Use Value: 100 V VDS withstands ISO 7637-2 load-dump transients; low RDS(on) reduces self-heating during constant-on operation. |
Use Scenario: Half-bridge leg switching in 12 V EPS motor inverters where compact size and thermal resilience are critical in confined steering column space. IC Role / Device Role / Timing Role: Dual N-channel configured as synchronous rectifier and high-side switch (with external level shift) in compact H-bridge topology. Use Value: LFPAK56D's low-profile footprint saves board area; 2.21 K/W Rth(j-mb) maintains <125 °C junction temp under 15 A RMS motor current. |
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 |
|---|---|---|---|
| Infineon BSC028N06NS3 | Single-channel 60 V, 110 A, RDS(on) = 2.8 mΩ @ 10 V; no AEC-Q101 qualification stated in public datasheet. | Higher current, lower voltage - suited for 48 V systems or single-load high-power apps, not dual-channel 12 V automotive. | Select only if dual-channel integration is unnecessary and 60 V rating suffices; verify AEC-Q101 status directly with Infineon. |
| Vishay SI7850DP-T1-GE3 | Dual-channel 100 V, 12 A per FET, RDS(on) = 42 mΩ @ 10 V; AEC-Q101 qualified but higher on-resistance and lower current rating. | Lower power handling - suitable for auxiliary loads (e.g., HVAC actuators) but insufficient for starter or transmission solenoids. | Choose when board space is constrained and 12 A per channel meets requirement; avoid for >20 A peak load applications. |
Compared with BUK9K29-100E, BSC028N06NS3 offers higher single-FET current but lacks dual integration and confirmed AEC-Q101 compliance, while SI7850DP-T1-GE3 provides dual-channel functionality at lower current and higher RDS(on), limiting its use to less demanding automotive subsystems.
Availability
BUK9K29-100E is available at Aetrix Electronics and suitable for automotive power distribution, transmission control units, and start-stop micro-hybrid systems requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for BUK9K29-100E 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified MOSFETs and ESD protection solutions.
The BUK9K series belongs to Nexperia's TrenchMOS automotive power portfolio, engineered specifically for robust, thermally resilient switching in 12 V vehicle networks-including engine control, body electronics, and ADAS subsystems.
FAQ
Is BUK9K29-100E pin-compatible with other LFPAK56D dual MOSFETs?
No-BUK9K29-100E has a unique 8-pin pinout (S1-G1-S2-G2-D2-D2-D1-D1) optimized for dual independent low-side switching. Other LFPAK56D dual MOSFETs may differ in pin assignment (e.g., shared source or different drain pin pairing), requiring PCB layout verification before substitution.
What is the maximum recommended gate resistor value for 10 kHz PWM operation?
For 10 kHz PWM with 5 V logic drive, a 10 Ω gate resistor balances switching speed and ringing suppression. With QG(tot) = 54 nC and typical driver output impedance <2 Ω, this yields ~60 ns turn-on delay and <100 ns fall time-well within safe SOA limits per Figure 4 of the datasheet.
Does BUK9K29-100E support parallel operation of FET1 and FET2 for higher current?
No-FET1 and FET2 are electrically isolated but share no internal thermal coupling or matched characteristics for current sharing. Parallel use is not recommended; each channel must be driven and loaded independently per design guidelines in Section 4 of the datasheet.
Can BUK9K29-100E replace a single-channel 100 V MOSFET in existing designs?
Yes-with careful layout adaptation. Its dual configuration allows consolidation of two single-channel switches into one footprint, but requires separate gate drive signals and independent source routing. The LFPAK56D outline matches SOT1205 land pattern, enabling drop-in replacement only if original design accommodates dual gates and sources.
BUK9K29-100E/1X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1205, 8-LFPAK56
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- -
- Configuration:
- -
- FET Feature:
- Logic Level Gate
- Drain to Source Voltage (Vdss):
- 100V
- Current - Continuous Drain (Id) @ 25°C:
- 30A (Ta)
- Rds On (Max) @ Id, Vgs:
- 27mOhm @ 5A, 10V
- Vgs(th) (Max) @ Id:
- 2.1V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 54nC @ 10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 3637pF @ 25V
- Power - Max:
- 68W (Ta)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56D
BUK9K29-100E/1X FAQ
1.How can I place an order for BUK9K29-100E/1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9K29-100E/1X 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 BUK9K29-100E/1X reliable?
The price and inventory of BUK9K29-100E/1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9K29-100E/1X is usually 5 days.
3.What payment methods are accepted for BUK9K29-100E/1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9K29-100E/1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK9K29-100E/1X?
BUK9K29-100E/1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9K29-100E/1X 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 BUK9K29-100E/1X?
For technical support, including BUK9K29-100E/1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9K29-100E/1X requirements.
6.How does Aetrix verify that BUK9K29-100E/1X is sourced from the original manufacturer or authorized distributors?
All BUK9K29-100E/1X 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 BUK9K29-100E/1X meets industry standards.
7.What is the process for return or replacement of BUK9K29-100E/1X?
All BUK9K29-100E/1X units undergo pre-shipment inspection (PSI). If there is an issue with BUK9K29-100E/1X, 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 BUK9K29-100E/1X part is unused and in its original packaging.
Return procedure for BUK9K29-100E/1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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