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

NXP Semiconductors BUK7504-40A,127

Name: BUK7504-40A,127
Brand: NXP Semiconductors
SKU: BUK7504-40A,127
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7504-40A,127

Manufacturer:: NXP Semiconductors

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: BUK7504-40A,127.pdf

Description:: MOSFET N-CH 40V 75A TO220AB

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Product details

Overview

BUK7504-40A from Nexperia is a standard-level N-channel TrenchMOS power MOSFET in TO-220AB (SOT78) package, rated for 40 V drain-source voltage, 75 A continuous drain current at T_mb = 100 °C, and 8.5 mΩ R_DS(on) at T_j = 175 °C. It serves as a high-current, thermally robust switching element in automotive 12 V load control circuits including motors, lamps, and solenoids.

For engineers reviewing the BUK7504-40A datasheet, BUK7504-40A pinout, BUK7504-40A application, or BUK7504-40A equivalent, key selection criteria include its AEC-Q101 qualification, 175 °C junction rating, low R_DS(on) at elevated temperature, avalanche energy rating of 1.6 J, and compatibility with standard 10 V gate drive sources.

Technical Context

This device uses TrenchMOS technology to achieve low on-state resistance while maintaining robust thermal performance and avalanche ruggedness. Its gate threshold voltage ranges from 1 V to 4.4 V across -55 °C to 175 °C, enabling reliable turn-on with standard logic-level gate drivers under wide temperature conditions.

The MOSFET features integrated source-drain diode with 0.85–1.2 V forward voltage at 40 A and 96 ns reverse recovery time, supporting inductive load commutation. Thermal resistance from junction to mounting base is 0.5 K/W, enabling high-power dissipation when heatsink-mounted.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V maximum - supports 12 V automotive systems with margin against load dump transients
I_D (continuous)	75 A at T_mb = 100 °C - enables high-current switching without derating in thermally constrained environments
R_DS(on)	8.5 mΩ max at V_GS = 10 V, I_D = 25 A, T_j = 175 °C - ensures low conduction loss and minimal self-heating at full operating temperature
E_AS	1.6 J non-repetitive avalanche energy - provides robustness against inductive switching stress without external snubbers
T_j max	175 °C - allows operation in under-hood automotive locations and other thermally demanding applications
Q_G(tot)	117 nC typical - defines gate drive power requirement and switching speed with 10 Ω external gate resistor
R_th(j-mb)	0.5 K/W - enables efficient heat transfer to heatsink, supporting up to 300 W total power dissipation at T_mb = 25 °C

Pinout & Package

Package: TO-220AB (SOT78), plastic single-ended package with heatsink-mounted mounting base connected internally to drain. Features three leads and one mounting hole.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal; requires 10 V for full enhancement; threshold range 1–4 V supports standard logic-level drive
2 (D)	Drain	Main current input; electrically tied to mounting base for direct heatsink coupling and low-inductance power path
3 (S)	Source	Current return path; referenced to system ground in low-side switch configurations
Mounting base (mb)	Drain connection	Provides mechanical attachment and thermal interface; must be electrically isolated from chassis unless drain is at system ground potential

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive critical applications including engine control, body electronics, and ADAS power stages
175 °C junction rating	Enables reliable operation in under-hood environments without thermal shutdown or parameter drift
Low R_DS(on) at high temperature	8.5 mΩ at 175 °C ensures stable conduction loss over full automotive temperature range
Standard-level gate drive	Operates fully enhanced with 10 V gate-source voltage - compatible with common microcontroller GPIOs and driver ICs
Avalanche ruggedness	1.6 J unclamped avalanche energy allows safe handling of inductive kickback without external protection components

Applications

Automotive Body Control Module	12 V DC Motor Driver
Use Scenario: Switching headlamps, HVAC blowers, and power window actuators in vehicle body control units. IC Role / Device Role / Timing Role: High-side or low-side power switch controlling 12 V loads with PWM or on/off duty cycles. Use Value: AEC-Q101 qualification and 175 °C rating ensure long-term reliability in vibration-prone, high-temperature cabin and engine bay locations.	Use Scenario: Driving brushed DC motors in seat adjusters, sunroof mechanisms, and cooling fans. IC Role / Device Role / Timing Role: Low-side switching element managing bidirectional current flow during motor direction reversal and braking. Use Value: Integrated source-drain diode with 96 ns t_rr and 224 nC Q_r enables efficient freewheeling and reduces EMI during commutation.
Industrial Solenoid Controller	Truck/Bus Lighting System
Use Scenario: Controlling hydraulic or pneumatic solenoid valves in agricultural machinery and construction equipment. IC Role / Device Role / Timing Role: Robust power switch handling high inrush currents and repetitive inductive transients. Use Value: 1.6 J avalanche energy rating eliminates need for external clamping diodes, simplifying PCB layout and improving system MTBF.	Use Scenario: Managing LED and incandescent lighting loads in commercial vehicles where load dump events exceed 40 V. IC Role / Device Role / Timing Role: Primary load switch protecting downstream circuitry from battery voltage surges and reverse polarity faults. Use Value: 40 V V_DS rating with margin above nominal 24 V truck systems accommodates ISO 7637-2 pulse 5a (load dump) without breakdown.

Automotive Body Control Module

12 V DC Motor Driver

Use Scenario: Switching headlamps, HVAC blowers, and power window actuators in vehicle body control units.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling 12 V loads with PWM or on/off duty cycles.

Use Value: AEC-Q101 qualification and 175 °C rating ensure long-term reliability in vibration-prone, high-temperature cabin and engine bay locations.

Use Scenario: Driving brushed DC motors in seat adjusters, sunroof mechanisms, and cooling fans.

IC Role / Device Role / Timing Role: Low-side switching element managing bidirectional current flow during motor direction reversal and braking.

Use Value: Integrated source-drain diode with 96 ns t_rr and 224 nC Q_r enables efficient freewheeling and reduces EMI during commutation.

Industrial Solenoid Controller

Truck/Bus Lighting System

Use Scenario: Controlling hydraulic or pneumatic solenoid valves in agricultural machinery and construction equipment.

IC Role / Device Role / Timing Role: Robust power switch handling high inrush currents and repetitive inductive transients.

Use Value: 1.6 J avalanche energy rating eliminates need for external clamping diodes, simplifying PCB layout and improving system MTBF.

Use Scenario: Managing LED and incandescent lighting loads in commercial vehicles where load dump events exceed 40 V.

IC Role / Device Role / Timing Role: Primary load switch protecting downstream circuitry from battery voltage surges and reverse polarity faults.

Use Value: 40 V V_DS rating with margin above nominal 24 V truck systems accommodates ISO 7637-2 pulse 5a (load dump) without breakdown.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP75NF40	40 V, 75 A, R_DS(on) = 10.5 mΩ @ 10 V, 25 °C; TO-220FP package; no AEC-Q101 qualification	Designed for industrial/commercial use only; not validated for automotive temperature cycling or humidity testing	Acceptable for non-automotive 12–24 V switching where qualification is not required and higher R_DS(on) is tolerable
IRF1404ZPBF	40 V, 200 A, R_DS(on) = 4.7 mΩ @ 10 V, 25 °C; TO-220AB; no AEC-Q101; lower thermal resistance but larger die size increases gate charge (160 nC)	Higher peak current capability but lacks automotive qualification and has reduced avalanche ruggedness (1.0 J)	Suitable for high-efficiency industrial SMPS or UPS where gate drive strength and conduction loss dominate over qualification and transient robustness

Compared with STP75NF40 and IRF1404ZPBF, the BUK7504-40A trades slightly higher room-temperature R_DS(on) for guaranteed automotive qualification, superior high-temperature on-resistance stability, and higher avalanche energy-making it the preferred choice for safety-critical 12 V load switching where reliability under thermal and electrical stress is mandatory.

Availability

BUK7504-40A is available at Aetrix Electronics and suitable for automotive body electronics, industrial solenoid control, 12 V DC motor drives, and commercial vehicle lighting systems requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for BUK7504-40A 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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division. It focuses on high-volume, high-reliability components for automotive, industrial, computing, and consumer markets.

The BUK7504-40A belongs to Nexperia's TrenchMOS automotive-qualified PowerMOS family, engineered specifically for robust, thermally stable switching in 12 V and 24 V automotive power distribution and load control applications.

FAQ

What is the maximum continuous drain current rating for BUK7504-40A?

The BUK7504-40A supports 75 A continuous drain current at mounting base temperature (T_mb) = 100 °C, limited by package thermal constraints. At T_mb = 25 °C, the absolute maximum is 198 A, but practical design must respect thermal limits defined in Figure 1 and Figure 3 of the datasheet. The BUK7504-40A's 0.5 K/W R_th(j-mb) enables this high current when properly heatsinked.

Is BUK7504-40A qualified for automotive applications?

Yes, the BUK7504-40A is AEC-Q101 qualified and explicitly designed and tested for automotive critical applications per the manufacturer's product profile. Its 175 °C junction rating, 1.6 J avalanche energy, and qualification to relevant AEC standards make it suitable for under-hood and body control module deployments where reliability under thermal cycling, humidity, and vibration is essential.

What gate drive voltage is required for full enhancement of BUK7504-40A?

The BUK7504-40A is a standard-level MOSFET requiring 10 V gate-source voltage (V_GS) for full enhancement and minimum R_DS(on). Its gate threshold voltage (V_GS(th)) ranges from 1 V to 4.4 V across temperature, ensuring turn-on with common 5 V or 3.3 V logic-level drivers when used with appropriate gate pull-up or level-shifting. However, 10 V is recommended to guarantee 8.5 mΩ R_DS(on) at 175 °C.

Does BUK7504-40A include an integrated body diode, and what are its characteristics?

Yes, the BUK7504-40A includes an integrated source-drain (body) diode with forward voltage (V_SD) of 0.85–1.2 V at 40 A and 25 °C, and reverse recovery time (t_rr) of 96 ns under specified test conditions. This diode supports freewheeling in inductive load applications such as motors and solenoids, reducing need for external flyback components in many designs.

What is the thermal resistance from junction to mounting base for BUK7504-40A?

The BUK7504-40A has a maximum thermal resistance of 0.5 K/W from junction to mounting base (R_th(j-mb)). This low value reflects its TO-220AB (SOT78) package design with the drain-connected mounting base acting as primary thermal path. Effective heatsinking of the mounting base is essential to maintain junction temperature within the 175 °C limit during high-current operation.

BUK7504-40A,127 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: TrenchMOS™

Package/Case:: TO-220-3

Packaging:: Bulk

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 75A (Tc)

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

Rds On (Max) @ Id, Vgs:: 4.5mOhm @ 25A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: 117 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 5730 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 300W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

BUK7504-40A,127 FAQ

1.How can I place an order for BUK7504-40A,127 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7504-40A,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 BUK7504-40A,127 reliable?

The price and inventory of BUK7504-40A,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7504-40A,127 is usually 5 days.

3.What payment methods are accepted for BUK7504-40A,127?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7504-40A,127 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7504-40A,127?

BUK7504-40A,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7504-40A,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 BUK7504-40A,127?

For technical support, including BUK7504-40A,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7504-40A,127 requirements.

6.How does Aetrix verify that BUK7504-40A,127 is sourced from the original manufacturer or authorized distributors?

All BUK7504-40A,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 BUK7504-40A,127 meets industry standards.

7.What is the process for return or replacement of BUK7504-40A,127?

All BUK7504-40A,127 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7504-40A,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 BUK7504-40A,127 part is unused and in its original packaging.

Return procedure for BUK7504-40A,127:

1.Submit a request within 90 days.

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

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