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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

NXP Semiconductors BUK9540-100A,127

Name: BUK9540-100A,127
Brand: NXP Semiconductors
SKU: BUK9540-100A,127
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9540-100A,127

Manufacturer:: NXP Semiconductors

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: BUK9540-100A,127.pdf

Description:: NEXPERIA BUK9540 - N-CHANNEL MOS

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Product details

Overview

BUK9540-100A from NXP Semiconductors (formerly Philips) is an N-channel TrenchMOS™ logic-level power MOSFET in SOT78 (TO-220AB) package, rated for 100 V drain-source voltage, 39 A DC drain current at 25 °C with 5 V gate drive, and 40 mΩ maximum R_DS(on) at 25 °C/5 V/25 A. It delivers automotive-grade switching for 12 V/24 V loads including motors and solenoids.

For engineers reviewing the BUK9540-100A datasheet, BUK9540-100A pinout, BUK9540-100A application, or BUK9540-100A equivalent, this page provides verified electrical specs, thermal resistance (0.95 K/W j-mb), Q_g(tot) (48 nC), avalanche energy rating (182 mJ), and logic-level gate compatibility down to 4.5 V - critical for low-voltage microcontroller interfacing.

Technical Context

This device uses trench-gate silicon technology to achieve low R_DS(on) while maintaining robust avalanche ruggedness (182 mJ unclamped) and 175 °C junction temperature rating. Its gate threshold voltage (V_GS(th)) ranges from 1.0–2.0 V at 25 °C, enabling reliable turn-on with 3.3 V or 5 V logic controllers.

The integrated source-drain diode supports freewheeling in inductive loads, with 0.85–1.2 V forward voltage at 25 A and 60 ns reverse recovery time. Thermal design is anchored by a low 0.95 K/W junction-to-mounting-base resistance, optimized for heatsink-mounted operation in high-power automotive modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - Maximum continuous drain-source blocking voltage; suitable for 42 V automotive systems with margin.
I_D (DC)	39 A at T_mb = 25 °C, V_GS = 5 V - Sustained load current capability when mounted on heatsink at ambient temperature.
R_DS(on)	40 mΩ max at T_j = 25 °C, V_GS = 5 V, I_D = 25 A - Low conduction loss enabling <1 W dissipation at 25 A, reducing thermal stress.
Q_g(tot)	48 nC - Total gate charge determining drive strength requirement; compatible with standard logic-level gate drivers.
E_AS	182 mJ - Non-repetitive avalanche energy rating; enables robust operation during inductive switch-off transients without external snubbers.
T_j max	175 °C - Maximum operating junction temperature; supports under-hood automotive environments with extended thermal headroom.
R_th(j-mb)	0.95 K/W - Junction-to-mounting-base thermal resistance; defines minimum heatsink requirement for thermal management.

Pinout & Package

BUK9540-100A is housed in SOT78 (TO-220AB) plastic package with isolated mounting base electrically connected to drain. The package features three leads and is designed for vertical heatsink mounting via the metal base.

Pin/Terminal	Circuit Role	Design Meaning
1	Gate (G)	Control terminal; logic-level compatible (V_GS(th) = 1.0–2.0 V); requires ≤15 V absolute max gate-source voltage.
2	Drain (D)	Main power output terminal; electrically tied to mounting base; carries full load current and dissipates heat into heatsink.
3	Source (S)	Power return path; referenced to system ground; used for current sensing and gate drive reference in high-side configurations.

Key Features

Feature	Design Value
TrenchMOS™ technology	Enables 40 mΩ R_DS(on) at 100 V rating - superior conduction efficiency vs planar MOSFETs in same voltage class.
Logic-level gate drive	Guaranteed turn-on with 4.5 V V_GS; eliminates need for gate driver ICs when interfaced with 3.3 V/5 V microcontrollers.
AEC-Q101 qualified	Validated for automotive power electronics per stress test standard - ensures reliability in engine control, body electronics, and chassis systems.
175 °C junction rating	Supports operation in high-temperature under-hood locations without derating at full current up to 100 °C mounting base temperature.
Integrated source-drain diode	Provides 25 A forward current capability with 60 ns t_rr; enables self-commutated flyback in motor and solenoid drivers.

Applications

Automotive Body Control Module	Industrial 24 V DC Motor Driver
Use Scenario: Switching of door locks, window lifters, and HVAC actuators in 12 V/24 V vehicle platforms. IC Role / Device Role / Timing Role: High-side or low-side power switch controlling resistive and inductive loads with PWM or on/off duty cycles. Use Value: Low R_DS(on) minimizes power loss and heat generation in space-constrained modules; logic-level drive simplifies MCU interface.	Use Scenario: Driving brushed DC motors in factory automation equipment powered from 24 V industrial supplies. IC Role / Device Role / Timing Role: Main power stage switch in H-bridge or half-bridge configurations handling bidirectional motor control. Use Value: 182 mJ avalanche energy withstands inductive kickback during rapid PWM transitions; 175 °C rating ensures stability in enclosed enclosures.
Truck Lighting Load Management	42 V Mild Hybrid Auxiliary Power
Use Scenario: Solid-state replacement of relays for headlamp, fog lamp, and auxiliary lighting circuits in commercial vehicles. IC Role / Device Role / Timing Role: Low-side switching element managing up to 39 A peak load current with fast turn-on/turn-off timing. Use Value: 20 ns turn-on delay and 90 ns fall time enable precise PWM dimming; Q_gd = 20 nC limits Miller-induced shoot-through risk.	Use Scenario: Power switching in 42 V subsystems such as starter-generator control, battery management, and DC-DC converters in mild hybrid architectures. IC Role / Device Role / Timing Role: Primary switching FET in synchronous rectification or high-efficiency buck/boost stages. Use Value: 100 V V_DS rating provides 1.2× safety margin over 42 V nominal bus; R_th(j-mb) = 0.95 K/W enables compact heatsink integration.

Automotive Body Control Module

Industrial 24 V DC Motor Driver

Use Scenario: Switching of door locks, window lifters, and HVAC actuators in 12 V/24 V vehicle platforms.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling resistive and inductive loads with PWM or on/off duty cycles.

Use Value: Low R_DS(on) minimizes power loss and heat generation in space-constrained modules; logic-level drive simplifies MCU interface.

Use Scenario: Driving brushed DC motors in factory automation equipment powered from 24 V industrial supplies.

IC Role / Device Role / Timing Role: Main power stage switch in H-bridge or half-bridge configurations handling bidirectional motor control.

Use Value: 182 mJ avalanche energy withstands inductive kickback during rapid PWM transitions; 175 °C rating ensures stability in enclosed enclosures.

Truck Lighting Load Management

42 V Mild Hybrid Auxiliary Power

Use Scenario: Solid-state replacement of relays for headlamp, fog lamp, and auxiliary lighting circuits in commercial vehicles.

IC Role / Device Role / Timing Role: Low-side switching element managing up to 39 A peak load current with fast turn-on/turn-off timing.

Use Value: 20 ns turn-on delay and 90 ns fall time enable precise PWM dimming; Q_gd = 20 nC limits Miller-induced shoot-through risk.

Use Scenario: Power switching in 42 V subsystems such as starter-generator control, battery management, and DC-DC converters in mild hybrid architectures.

IC Role / Device Role / Timing Role: Primary switching FET in synchronous rectification or high-efficiency buck/boost stages.

Use Value: 100 V V_DS rating provides 1.2× safety margin over 42 V nominal bus; R_th(j-mb) = 0.95 K/W enables compact heatsink integration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP100N10F7	100 V, 100 A, 9.5 mΩ R_DS(on), TO-220 package; higher current, lower R_DS(on), but requires 10 V gate drive for full spec.	Not logic-level - needs gate driver for 3.3 V MCU control; better suited for high-efficiency SMPS than automotive load switching.	Select STP100N10F7 only if gate drive voltage ≥10 V is available and lower conduction loss is prioritized over logic compatibility.
IRF540NPBF	100 V, 33 A, 44 mΩ R_DS(on), TO-220; non-logic-level (V_GS(th) = 2–4 V), not AEC-Q101 qualified.	Lacks automotive qualification and guaranteed 4.5 V turn-on; suitable for industrial bench prototypes but not production automotive use.	Choose IRF540NPBF only for cost-sensitive non-automotive applications where AEC-Q101 compliance and logic-level drive are not required.

Compared with STP100N10F7 and IRF540NPBF, BUK9540-100A uniquely combines AEC-Q101 qualification, guaranteed 4.5 V logic-level operation, and 175 °C rating - making it the only drop-in solution for production automotive body electronics without gate driver redesign.

Availability

BUK9540-100A is available at Aetrix Electronics and suitable for automotive body control, industrial motor drives, and 42 V mild hybrid auxiliary power systems requiring stable component supply across multi-year production cycles.

Supply support for BUK9540-100A 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

NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, and IoT applications, with heritage in Philips Semiconductor's power device innovation.

BUK9540-100A belongs to the TrenchMOS™ logic-level FET product line, engineered specifically for robust, high-current switching in automotive 12 V/24 V/42 V power networks with minimal gate drive complexity.

FAQ

What is the maximum gate-source voltage rating for BUK9540-100A?

The absolute maximum gate-source voltage (V_GS) for BUK9540-100A is ±15 V. Exceeding this rating risks permanent gate oxide damage. For reliable operation, gate drive should be limited to 10 V maximum under normal conditions, with transient spikes clamped below 15 V using Zener protection. This specification is confirmed in Table 3 of the official product data sheet Rev. 03.

Does BUK9540-100A have built-in avalanche ruggedness, and what is its rating?

Yes, BUK9540-100A is specified for non-repetitive avalanche energy (E_DS(AL)S) of 182 mJ under unclamped inductive load conditions (I_D = 39 A, V_DS ≤100 V, V_GS = 5 V, R_GS = 50 Ω). This rating allows safe operation during inductive turn-off transients without external snubbers - a key feature validated in automotive load-switching applications.

Is BUK9540-100A qualified to AEC-Q101 standards?

Yes, BUK9540-100A is explicitly stated as Q101 compliant in Section 2 "Features" of the product data sheet. This qualification covers stress testing for temperature cycling, humidity, and high-temperature operating life - confirming suitability for automotive power electronics deployed in harsh environments.

What is the thermal resistance from junction to mounting base for BUK9540-100A?

The thermal resistance from junction to mounting base (R_th(j-mb)) for BUK9540-100A is 0.95 K/W, as specified in Table 4 "Thermal characteristics". This value applies to the SOT78 (TO-220AB) package and forms the basis for heatsink sizing when the device is mounted directly to a thermally conductive surface.

Can BUK9540-100A be driven directly by a 3.3 V microcontroller GPIO?

BUK9540-100A has a gate threshold voltage (V_GS(th)) range of 1.0–2.0 V at 25 °C, and its R_DS(on) is characterized down to V_GS = 4.5 V. While 3.3 V may partially enhance the channel, full 39 A current capability and low 40 mΩ R_DS(on) require ≥4.5 V gate drive. For robust 3.3 V MCU interfacing, a level-shifting gate driver is recommended to ensure reliable saturation.

BUK9540-100A,127 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: TrenchMOS™

Package/Case:: TO-220-3

Packaging:: Bulk

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 39A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 39mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 2V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 48 nC @ 5 V

Vgs (Max):: ±15V

Input Capacitance (Ciss) (Max) @ Vds:: 3072 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 158W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

BUK9540-100A,127 FAQ

1.How can I place an order for BUK9540-100A,127 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9540-100A,127 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 BUK9540-100A,127 reliable?

The price and inventory of BUK9540-100A,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9540-100A,127 is usually 5 days.

3.What payment methods are accepted for BUK9540-100A,127?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9540-100A,127 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9540-100A,127?

BUK9540-100A,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9540-100A,127 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 BUK9540-100A,127?

For technical support, including BUK9540-100A,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9540-100A,127 requirements.

6.How does Aetrix verify that BUK9540-100A,127 is sourced from the original manufacturer or authorized distributors?

All BUK9540-100A,127 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 BUK9540-100A,127 meets industry standards.

7.What is the process for return or replacement of BUK9540-100A,127?

All BUK9540-100A,127 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9540-100A,127, 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 BUK9540-100A,127 part is unused and in its original packaging.

Return procedure for BUK9540-100A,127:

1.Submit a request within 90 days.

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

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