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

Nexperia USA Inc. BUK7K29-100EX

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

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Part No.:: BUK7K29-100EX

Manufacturer:: Nexperia USA Inc.

Category:: FET, MOSFET Arrays

Package:: SOT-1205, 8-LFPAK56

Datasheet:: BUK7K29-100EX.pdf

Description:: MOSFET 2N-CH 100V 29.5A LFPAK56D

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Product details

Overview

BUK7K29-100EX from Nexperia is a dual N-channel standard-level MOSFET in LFPAK56D (SOT1205) package, rated for 100 V drain-source voltage, 24.5 mΩ R_DS(on) at 10 V_GS/25 °C, and qualified to AEC-Q101 for automotive use. It delivers 29.5 A continuous drain current at T_mb = 25 °C and supports thermally demanding environments up to 175 °C junction temperature - deployed in transmission control and high-reliability 12–48 V automotive power switching.

For engineers reviewing the BUK7K29-100EX datasheet, BUK7K29-100EX pinout, BUK7K29-100EX application, or BUK7K29-100EX equivalent, key selection criteria include its dual-channel layout, repetitive avalanche rating, true standard-level gate (V_GS(th) > 1 V at 175 °C), and low thermal resistance (R_th(j-mb) = 2.21 K/W) enabling high-power density designs without gate drivers.

Technical Context

This dual MOSFET integrates two independent trench-based N-channel devices in a single LFPAK56D package with shared mounting base and isolated source/gate/drain terminals. Its design enables synchronous or independent channel control in half-bridge or dual-load configurations, with matched static and dynamic parameters across FET1 and FET2.

It features true standard-level gate drive compatibility (V_GS(th) ≥ 1 V at 175 °C), repetitive avalanche capability (E_AS = 83 mJ), and robust thermal performance (T_j max = 175 °C), making it suitable for unregulated battery-fed automotive subsystems where gate voltage headroom is constrained and thermal cycling is severe.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - Maximum blocking voltage for 12/24/48 V automotive bus transients and load dump protection
R_DS(on)	24.5 mΩ @ V_GS = 10 V, I_D = 10 A, T_j = 25 °C - Enables <1.5 W conduction loss at 25 A per channel
I_D	29.5 A continuous @ T_mb = 25 °C - Supports high-current solenoid and motor loads with minimal heatsinking
P_tot	68 W @ T_mb = 25 °C - High power dissipation enabled by low R_th(j-mb) = 2.21 K/W
Q_GD	13.1 nC - Low gate-drain charge minimizes switching losses and improves EMI behavior in hard-switched topologies
V_GS(th)	≥1 V @ T_j = 175 °C - Ensures reliable turn-on under worst-case hot-cranking and engine bay conditions
E_AS	83 mJ (non-repetitive) - Withstands inductive energy spikes during fault interruption without failure

Pinout & Package

Package: LFPAK56D (SOT1205), 8-lead plastic surface-mount package with exposed copper mounting base for enhanced thermal transfer.

Pin/Terminal	Circuit Role	Design Meaning
1	S1	Source terminal of FET1 - Electrically isolated from S2; connects to low-side return path of first load
2	G1	Gate terminal of FET1 - Standard-level input requiring ≥4.5 V for full enhancement; no level-shifting needed
3	S2	Source terminal of FET2 - Independent of S1; enables dual independent load control or half-bridge configuration
4	G2	Gate terminal of FET2 - Matched threshold and drive requirements to G1 for synchronized or decoupled operation
5,6	D2	Drain terminal of FET2 - Internally paralleled pins (5 & 6) reduce inductance and improve current sharing in high-di/dt applications
7,8	D1	Drain terminal of FET1 - Internally paralleled pins (7 & 8) provide low-inductance, high-current drain connection

Key Features

Feature	Design Value
Dual independent N-channel MOSFETs	Two matched, isolated channels in one compact LFPAK56D footprint - reduces PCB area vs. discrete dual-SO8 solutions
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST - suitable for safety-critical transmission and chassis systems
Repetitive avalanche rated	Rated for repeated inductive energy clamping without degradation - eliminates need for external snubbers in solenoid/motor drive
175 °C maximum junction temperature	Enables operation in under-hood environments (e.g., engine control modules) without derating or forced cooling
True standard-level gate	V_GS(th) > 1 V at 175 °C ensures guaranteed turn-on using 3.3 V or 5 V microcontroller GPIOs even at peak temperature

Applications

Transmission Control Module

Motor Load Switching

Use Scenario: Controlling hydraulic solenoids and shift actuators in automatic transmission control units.

IC Role / Device Role / Timing Role: Dual-channel high-side/low-side switch enabling precise PWM-controlled current regulation for proportional solenoids.

Use Value: Matched R_DS(on) and thermal tracking between FET1/FET2 ensure balanced current sharing and consistent actuator response across temperature.

Use Scenario: Driving brushed DC motors in HVAC blower, power seat, and window lift systems.

IC Role / Device Role / Timing Role: Half-bridge configured dual MOSFET providing bidirectional motor control with integrated body diodes for freewheeling.

Use Value: Repetitive avalanche rating absorbs back-EMF during rapid direction reversal, eliminating external flyback diodes and reducing BOM count.

48 V Mild Hybrid Power Distribution

LED Headlamp Matrix Driver

Use Scenario: Managing load switching and fault isolation in 48 V battery-powered mild hybrid architectures.

IC Role / Device Role / Timing Role: Dual independent load switches handling high-current auxiliary loads (e.g., turbocharger oil pump, active suspension).

Use Value: 100 V V_DS rating withstands 48 V system transients up to 80 V, while 175 °C rating supports under-hood placement near engine block.

Use Scenario: Pixel-level current switching for adaptive LED headlamps with dynamic beam shaping.

IC Role / Device Role / Timing Role: Fast-switching dual channel controlling individual LED strings with precise pulse-width modulation.

Use Value: Low Q_GD (13.1 nC) and fast switching times (t_r = 13.3 ns, t_f = 18 ns) enable clean PWM edges and minimal thermal rise during high-frequency dimming.

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
STL220N6LF8AG	60 V V_DS, 1.8 mΩ R_DS(on), PowerFLAT 5x6 package, AEC-Q101	Limited to 24 V systems; superior R_DS(on) but lower voltage margin for 48 V transients	Select when ultra-low conduction loss in 12/24 V systems outweighs need for 100 V transient immunity
ON Semiconductor NTMFS5C675NL	60 V V_DS, 2.5 mΩ R_DS(on), SO-8FL package, AEC-Q101	Single-channel only; requires two devices for dual functionality; higher R_th(j-a) than LFPAK56D	Choose for cost-sensitive 24 V applications where board space allows dual SO-8FL placement and thermal management is less constrained

Compared with STL220N6LF8AG and NTMFS5C675NL, BUK7K29-100EX uniquely combines 100 V rating, dual-channel integration, and 175 °C operation - making it the only option qualified for thermally aggressive 48 V automotive loads requiring single-package redundancy and transient robustness.

Availability

BUK7K29-100EX is available at Aetrix Electronics and suitable for automotive transmission control, 48 V mild hybrid power distribution, and adaptive LED headlamp systems requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for BUK7K29-100EX 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 components for automotive, industrial, and consumer markets with emphasis on efficiency and miniaturization.

BUK7K29-100EX belongs to Nexperia's Automotive Logic and Power portfolio, engineered specifically for high-reliability, high-temperature automotive power switching where space, thermal performance, and qualification rigor are critical.

FAQ

Is BUK7K29-100EX pin-compatible with other LFPAK56D dual MOSFETs?

No - BUK7K29-100EX uses a unique pinout (S1-G1-S2-G2-D2-D2-D1-D1) optimized for dual independent channel routing. Unlike some dual LFPAK56D variants with shared sources or gates, its fully isolated pin assignment prevents direct substitution without PCB redesign.

What is the maximum recommended gate resistor for driving BUK7K29-100EX at 20 kHz PWM?

A 5 Ω external gate resistor is validated per datasheet Fig. 14 for 20 kHz switching with V_GS = 10 V, yielding t_r = 13.3 ns and t_f = 18 ns. Higher values increase switching losses; lower values risk ringing due to Q_GD-driven Miller effect - especially with layout inductance > 3 nH.

Does BUK7K29-100EX require a negative gate voltage for safe turn-off in inductive loads?

No - its standard-level gate architecture and V_GS = ±20 V absolute maximum rating allow safe turn-off with 0 V gate drive. The device's body diode and avalanche rating (83 mJ) handle inductive kickback without requiring active clamp or negative bias.

Can BUK7K29-100EX be used in parallel with another unit for higher current capacity?

Not recommended - although R_DS(on) has positive tempco, the dual-die construction and internal pin paralleling (D1/D2) are optimized for single-unit operation. Parallel use introduces mismatched thermal coupling and current imbalance risks not characterized in the datasheet.

BUK7K29-100EX 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:: -

Drain to Source Voltage (Vdss):: 100V

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

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

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: LFPAK56D

BUK7K29-100EX FAQ

1.How can I place an order for BUK7K29-100EX through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7K29-100EX 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 BUK7K29-100EX reliable?

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

3.What payment methods are accepted for BUK7K29-100EX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7K29-100EX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7K29-100EX?

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

Once your BUK7K29-100EX 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 BUK7K29-100EX?

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

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

All BUK7K29-100EX 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 BUK7K29-100EX meets industry standards.

7.What is the process for return or replacement of BUK7K29-100EX?

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

Return procedure for BUK7K29-100EX:

1.Submit a request within 90 days.

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

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