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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FET, MOSFET Arrays

Nexperia USA Inc. BUK7K29-100E/1X

Name: BUK7K29-100E/1X
Brand: Nexperia USA Inc.
SKU: BUK7K29-100E/1X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7K29-100E/1X

Manufacturer:: Nexperia USA Inc.

Category:: FET, MOSFET Arrays

Package:: SOT-1205, 8-LFPAK56

Datasheet:: BUK7K29-100E/1X.pdf

Description:: MOSFET 100V 29.5A LFPAK56D

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Product details

Overview

BUK7K29-100E from Nexperia is a dual N-channel standard-level MOSFET in LFPAK56D (SOT1205) package, rated for 100 V V_DS, 24.5 mΩ R_DS(on) at 10 V V_GS and 25 °C, and qualified to AEC-Q101 for automotive use. It delivers 29.5 A continuous drain current at T_mb = 25 °C, supports 175 °C junction operation, and features repetitive avalanche capability - deployed in transmission control and high-reliability 12–48 V automotive power switching.

For engineers reviewing the BUK7K29-100E datasheet, BUK7K29-100E pinout, BUK7K29-100E application, or BUK7K29-100E equivalent, key selection criteria include its dual-channel layout, standard gate drive compatibility (V_GS(th) > 1 V at 175 °C), thermally robust 2.21 K/W R_th(j-mb), and AEC-Q101 qualification for under-hood deployment.

Technical Context

This dual MOSFET integrates two independent N-channel TrenchMOS devices in a single LFPAK56D package with shared thermal path and isolated gate terminals. Each channel supports 100 V blocking, 29.5 A continuous current, and 83 mJ non-repetitive avalanche energy under unclamped conditions.

It operates with true standard-level gate drive: V_GS(th) remains ≥1 V up to 175 °C, enabling direct interface with 3.3 V/5 V microcontrollers without level-shifting. The device exhibits low dynamic losses with Q_GD = 13.1 nC and C_iss = 1827 pF (typ), optimized for fast-switching automotive loads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - Maximum drain-source voltage; enables use in 48 V automotive systems with margin against load-dump transients.
R_DS(on)	24.5 mΩ (max) at V_GS = 10 V, I_D = 10 A, T_j = 25 °C - Low conduction loss supporting high-efficiency motor/solenoid drivers.
I_D (cont)	29.5 A at T_mb = 25 °C - High current capability per channel with PCB-mount thermal management.
P_tot	68 W at T_mb = 25 °C - Total dissipation limit reflecting robust thermal design for compact automotive modules.
R_th(j-mb)	2.21 K/W - Junction-to-mounting-base thermal resistance; enables direct heatsink attachment for sustained high-power operation.
V_GS(th)	≥1 V at T_j = 175 °C - Guaranteed turn-on with standard logic-level gate drive across full automotive temperature range.
E_AS	83 mJ - Non-repetitive avalanche energy; provides ruggedness against inductive switching stress in solenoid/motor control.

Pinout & Package

LFPAK56D (SOT1205) is a thermally enhanced surface-mount package with exposed copper mounting base and 8 leads. Its dual-drain configuration optimizes current sharing and thermal spreading for dual-MOSFET topologies.

Pin/Terminal	Circuit Role	Design Meaning
1	S1	Source terminal of FET1 - referenced ground node for first channel; electrically isolated from S2.
2	G1	Gate terminal of FET1 - accepts standard-level logic drive; no internal pull-down.
3	S2	Source terminal of FET2 - independent return path for second channel; not internally tied to S1.
4	G2	Gate terminal of FET2 - fully independent control input; enables asynchronous or complementary switching.
5, 6	D2	Drain terminals of FET2 - paralleled pins reduce inductance and improve current handling for high-side or low-side switching.
7, 8	D1	Drain terminals of FET1 - paralleled pins provide low-inductance, high-current path for first channel.

Key Features

Feature	Design Value
Dual independent N-channel MOSFETs	Two fully isolated channels in one footprint - reduces board area and interconnect in H-bridge or dual-load driver designs.
AEC-Q101 qualified	Validated for automotive applications including engine bay and transmission control - meets reliability and lifetime requirements per ISO/TS 16949.
175 °C maximum junction temperature	Enables operation in thermally demanding locations (e.g., near engines or inverters) without derating penalties beyond datasheet curves.
Repetitive avalanche rated	Guaranteed safe operation during repeated inductive turn-off events - eliminates need for external snubbers in solenoid/motor circuits.
True standard-level gate	V_GS(th) > 1 V at 175 °C ensures reliable turn-on with 3.3 V or 5 V MCU outputs - avoids gate driver ICs in space-constrained modules.

Applications

Transmission Control Module

Engine Cooling Fan Driver

Use Scenario: Electronic gear-shift actuation using dual solenoids requiring synchronized on/off timing and fault-tolerant redundancy.

IC Role / Device Role / Timing Role: Dual-channel high-side switch controlling solenoid coils; each FET handles one coil with independent gate control for phased activation.

Use Value: Integrated dual topology eliminates discrete pairing, reducing BOM count and PCB footprint while maintaining AEC-Q101 compliance for safety-critical function.

Use Scenario: PWM-controlled 24 V brushless cooling fan in engine compartment with ambient temperatures up to 125 °C.

IC Role / Device Role / Timing Role: Low-side switching element driving fan motor phase; leverages high R_DS(on) stability at elevated T_j for consistent speed regulation.

Use Value: 175 °C rating and 2.21 K/W R_th(j-mb) enable direct heatsink mounting - sustains 29.5 A output without thermal throttling under continuous duty.

48 V Mild Hybrid Starter-Generator Interface

LED Headlamp Matrix Switching

Use Scenario: Bidirectional power transfer between 48 V battery and starter-generator in P0/P1 hybrid architectures with regenerative braking.

IC Role / Device Role / Timing Role: Dual N-channel configured as synchronous rectifier pair in buck-boost converter stage; FET1/FET2 alternate conduction in high-frequency switching.

Use Value: Low Q_GD (13.1 nC) and C_iss (1827 pF) minimize switching losses at 100–200 kHz, improving system efficiency above 95%.

Use Scenario: Individual pixel control in adaptive LED headlamps with 100+ segments requiring fast, low-loss switching and thermal resilience.

IC Role / Device Role / Timing Role: High-speed low-side switch for LED string current paths; exploits fast tr (13.3 ns) and tf (18 ns) for precise PWM dimming.

Use Value: Avalanche ruggedness (83 mJ) absorbs inductive kickback from long LED traces - prevents latch-up or failure during hot-plug events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual N-channel MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N6LF8AG	60 V V_DS, 1.8 mΩ R_DS(on), PowerFLAT 5x6 package, AEC-Q101	Lower voltage rating limits use to ≤24 V systems; superior R_DS(on) benefits high-current, low-voltage motor drives.	Select when operating voltage is ≤60 V and ultra-low conduction loss is prioritized over 100 V transient margin.
ON Semiconductor NTMFS5C675NL	60 V V_DS, 2.1 mΩ R_DS(on), SO-8FL package, AEC-Q101	Limited to 60 V and lower thermal performance (R_th(j-mb) ≈ 3.5 K/W); suitable for cost-sensitive 12 V body electronics.	Choose for entry-level 12 V applications where 100 V rating and 175 °C operation are unnecessary.

Compared with STL220N6LF8AG and NTMFS5C675NL, the BUK7K29-100E uniquely supports 100 V operation and 175 °C junction temperature in a dual-channel configuration - making it the only option qualified for high-voltage, high-temperature automotive subsystems like 48 V hybrids and transmission actuators.

Availability

BUK7K29-100E is available at Aetrix Electronics and suitable for automotive transmission control, 48 V mild hybrid interfaces, and engine cooling fan drivers requiring stable component supply across extended temperature and lifetime requirements.

Supply support for BUK7K29-100E 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 focused on essential efficiency technologies, delivering high-performance, high-reliability components for automotive, industrial, and consumer markets.

The BUK7K series targets automotive power management with AEC-Q101-qualified MOSFETs engineered for thermally demanding, safety-critical applications such as transmission control, engine management, and 48 V systems.

FAQ

Is BUK7K29-100E suitable for high-side switching configurations?

Yes - both channels support high-side switching when used with appropriate gate-driving circuitry. The standard-level V_GS(th) (>1 V at 175 °C) and 100 V V_DS rating allow direct integration into 12–48 V high-side loads. However, external bootstrap or isolated gate drivers are required to maintain V_GS > 10 V during conduction.

What is the maximum allowable mounting base temperature for continuous operation?

The datasheet specifies continuous operation up to T_mb = 100 °C with I_D derated to 22 A (V_GS = 10 V). At T_mb = 125 °C, operation is limited to pulsed conditions per the Safe Operating Area (SOA) curve in Figure 3 - continuous use above 100 °C requires thermal modeling and validation.

Does BUK7K29-100E integrate body diodes, and what are their characteristics?

Yes - each channel includes an intrinsic source-drain diode with V_SD = 0.78 V (typ) at I_S = 10 A and T_j = 25 °C. Reverse recovery time is 38.4 ns with Q_r = 62.2 nC, enabling efficient freewheeling in inductive loads like solenoids and motors without external diodes.

How does the LFPAK56D package compare thermally to traditional SO-8?

LFPAK56D delivers R_th(j-mb) = 2.21 K/W versus ~6–8 K/W for standard SO-8 - a 3× improvement enabled by its exposed copper mounting base and optimized die attach. This allows >3× higher power dissipation at the same temperature rise, critical for automotive under-hood applications.

BUK7K29-100E/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:: -

Drain to Source Voltage (Vdss):: 100V

Current - Continuous Drain (Id) @ 25°C:: 29.5A (Ta)

Rds On (Max) @ Id, Vgs:: 24.5mOhm @ 10A, 10V

Vgs(th) (Max) @ Id:: 4V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 38.1nC @ 10V

Input Capacitance (Ciss) (Max) @ Vds:: 2436pF @ 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

BUK7K29-100E/1X FAQ

1.How can I place an order for BUK7K29-100E/1X through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7K29-100E/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 BUK7K29-100E/1X reliable?

The price and inventory of BUK7K29-100E/1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7K29-100E/1X is usually 5 days.

3.What payment methods are accepted for BUK7K29-100E/1X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7K29-100E/1X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7K29-100E/1X?

BUK7K29-100E/1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7K29-100E/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 BUK7K29-100E/1X?

For technical support, including BUK7K29-100E/1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7K29-100E/1X requirements.

6.How does Aetrix verify that BUK7K29-100E/1X is sourced from the original manufacturer or authorized distributors?

All BUK7K29-100E/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 BUK7K29-100E/1X meets industry standards.

7.What is the process for return or replacement of BUK7K29-100E/1X?

All BUK7K29-100E/1X units undergo pre-shipment inspection (PSI). If there is an issue with BUK7K29-100E/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 BUK7K29-100E/1X part is unused and in its original packaging.

Return procedure for BUK7K29-100E/1X:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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