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

Nexperia USA Inc. BUK725R0-40C,118

Name: BUK725R0-40C,118
Brand: Nexperia USA Inc.
SKU: BUK725R0-40C,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK725R0-40C,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: BUK725R0-40C,118.pdf

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

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Product details

Overview

BUK725R0-40C from Nexperia is an AEC-Q101 qualified N-channel TrenchMOS FET in DPAK (SOT428) package, designed for automotive 12V power switching. It delivers 75 A continuous drain current at 10 V gate drive, 4.1 mΩ R_DS(on) at 25 °C, 40 V V_DS, and operates up to 175 °C junction temperature-enabling robust control of motors, lamps, and solenoids in engine bays and battery management systems.

For engineers reviewing the BUK725R0-40C datasheet, BUK725R0-40C pinout, BUK725R0-40C application, or BUK725R0-40C equivalent, key selection criteria include avalanche ruggedness (240 mJ), thermal resistance (0.65 K/W j-mb), gate charge (60 nC total), and standard-level 10 V gate drive compatibility with legacy automotive microcontrollers.

Technical Context

This MOSFET employs TrenchMOS technology to achieve low on-resistance and high avalanche energy tolerance. Its gate threshold voltage ranges from 1 V (at 175 °C) to 4.4 V (at −55 °C), ensuring reliable turn-on across automotive temperature extremes while maintaining sub-1 µA leakage at 25 °C.

The device integrates a monolithic source-drain diode with 0.85 V forward drop at 25 A and 50 ns reverse recovery time, supporting PWM-driven inductive loads without external freewheeling diodes. Its 2.5 nH internal drain inductance and 7.5 nH source inductance are optimized for fast switching with minimal ringing in high-frequency motor control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V maximum - supports full 12V automotive system transients including load dump (up to ~40 V) without breakdown.
R_DS(on)	4.1 mΩ typical at V_GS = 10 V, I_D = 25 A, T_j = 25 °C - enables <1 W conduction loss at 75 A, critical for thermally constrained modules.
I_D (cont)	75 A at T_mb = 25 °C - rated by package thermal limit, not silicon, enabling direct heatsink mounting via metal base.
E_AS	240 mJ non-repetitive avalanche energy - sustains unclamped inductive switching events (e.g., solenoid de-energization) without failure.
R_th(j-mb)	0.65 K/W typical - allows >100 W power dissipation with ≤65 °C temperature rise from junction to heatsink, essential for under-hood reliability.
Q_G(tot)	60 nC - determines gate driver strength requirement; compatible with standard 1 A peak automotive gate drivers.
V_GS(th)	2–4 V range at 25 °C - ensures clear logic-level distinction between off-state and turn-on, minimizing shoot-through risk in half-bridge configurations.

Pinout & Package

Package: SOT428 (DPAK/SC-63), plastic surface-mount package with isolated mounting base connected to drain. Features three leads (G, D, S), one lead cropped, optimized for PCB heatsinking and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Controls channel conduction; requires 10 V for full enhancement; 2 nA leakage at 25 °C minimizes bias current errors.
2 (D)	Drain	Main high-side power terminal; electrically tied to mounting base for direct thermal path to heatsink.
3 (S)	Source	Power return node; referenced to gate drive; hosts integrated body diode cathode for freewheeling.
Mounting Base (mb)	Drain Thermal & Electrical Node	Exposed copper pad soldered to PCB copper pour; provides primary thermal conduction path (0.65 K/W) and carries full drain current.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive grade reliability (HTOL, TC, UHAST, ESD) - eliminates requalification effort for Tier 1 power modules.
Avalanche ruggedness	240 mJ single-pulse energy rating - enables elimination of external snubbers in 12V solenoid and fuel injector drivers.
175 °C junction rating	Guaranteed operation up to 175 °C ambient with derating - supports placement near engines, transmissions, and inverters without forced cooling.
Standard-level gate drive	Full enhancement at 10 V V_GS - interfaces directly with 5 V or 3.3 V MCU GPIOs via simple level-shifting or dedicated gate drivers.
Low Q_GD/Q_G ratio	27 nC / 60 nC = 0.45 - reduces Miller-induced switching delay and improves controllability during hard commutation in PWM motor drives.

Applications

Automotive Engine Control

12V Body Electronics

Use Scenario: Driving fuel injectors and ignition coils in gasoline/diesel ECUs under hood temperatures up to 150 °C.

IC Role / Device Role / Timing Role: High-side switch controlling inductive load current with precise PWM timing and fast turn-off to manage injection duration.

Use Value: 50 ns reverse recovery and 240 mJ avalanche rating prevent destructive voltage spikes during coil de-energization without snubber networks.

Use Scenario: Controlling HVAC blower motors, seat heaters, and door lock actuators in passenger compartment modules.

IC Role / Device Role / Timing Role: Low-side or high-side power switch enabling PWM speed regulation and overcurrent protection via R_DS(on) sensing.

Use Value: 4.1 mΩ R_DS(on) limits conduction loss to <2 W at 75 A, reducing thermal stress in sealed plastic enclosures.

Commercial Vehicle Lighting

Start-Stop Battery Management

Use Scenario: Switching high-intensity LED headlamps and fog lamps in trucks and buses subject to wide voltage transients (0–40 V).

IC Role / Device Role / Timing Role: Constant-current regulator front-end switch handling load dump surges and cold-crank dips.

Use Value: 40 V V_DS rating and 175 °C operation ensure uninterrupted lighting during 24 V system transients and under-bonnet heat soak.

Use Scenario: Isolating auxiliary battery banks and managing regenerative braking energy routing in 12V start-stop systems.

IC Role / Device Role / Timing Role: Bidirectional power switch (with external diode or synchronous rectification) for controlled charge/discharge sequencing.

Use Value: 75 A continuous rating and 0.65 K/W thermal resistance support >900 W power transfer with passive heatsinking on compact PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4F7AG	40 V, 220 A, 1.7 mΩ, but requires 4.5 V gate drive; TO-263 package with higher R_th(j-mb) (0.8 K/W)	Better current handling but larger footprint; less suitable for space-constrained ECU modules	Prefer when peak current >150 A is required and board area permits TO-263 mounting.
IRL1404ZPBF	40 V, 165 A, 4.0 mΩ, logic-level (2.5 V) gate, but not AEC-Q101 qualified; TO-220AB package	Lacks automotive qualification and has inferior thermal performance (R_th(j-a) ≈ 40 K/W)	Acceptable only for non-automotive industrial 12V loads where qualification and thermal density are secondary.

Compared with STL220N4F7AG and IRL1404ZPBF, BUK725R0-40C uniquely balances AEC-Q101 compliance, DPAK thermal efficiency (0.65 K/W), and standard 10 V gate drive-making it optimal for volume automotive modules where qualification, size, and thermal design margin are jointly critical.

Availability

BUK725R0-40C is available at Aetrix Electronics and suitable for automotive engine control units, 12V body electronics modules, and commercial vehicle lighting systems requiring stable component supply across extended product lifecycles.

Supply support for BUK725R0-40C 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified MOSFETs and ESD protection.

BUK725R0-40C belongs to Nexperia's TrenchMOS automotive power portfolio, engineered specifically for thermally demanding 12V/24V automotive power distribution and actuation-prioritizing AEC-Q101 compliance, avalanche robustness, and DPAK thermal performance.

FAQ

Is BUK725R0-40C suitable for high-frequency PWM motor control?

Yes. With 60 nC total gate charge, 27 nC gate-drain charge, and 50 ns reverse recovery time, it supports PWM frequencies up to 20 kHz in brushed DC motor drives. Its low Q_GD/Q_G ratio (0.45) minimizes Miller plateau effects, enabling clean switching edges even with moderate gate resistance (10 Ω).

What is the maximum safe operating temperature for continuous use?

The device is rated for continuous operation up to 175 °C junction temperature. At mounting base temperature of 100 °C, it sustains 75 A drain current per Figure 1. Derating begins above 100 °C T_mb, reaching 50 A at 150 °C T_mb, ensuring safe operation in under-hood environments with proper heatsinking.

Does the mounting base require electrical isolation from the PCB?

No-the mounting base is internally connected to the drain terminal and must be soldered directly to a large copper pour acting as both thermal sink and high-current return path. Electrical isolation would compromise thermal performance and violate the 0.65 K/W R_th(j-mb) specification; isolation is only needed if drain potential differs from PCB ground.

Can BUK725R0-40C replace older BUZ72 or STP40NF10 devices?

It can replace BUZ72 in 12V automotive applications due to identical 40 V rating, lower R_DS(on) (4.1 mΩ vs. 10 mΩ), and AEC-Q101 qualification-but not STP40NF10 (100 V, TO-220), which serves higher-voltage systems. Pin-compatible replacement requires verifying gate drive voltage compatibility (10 V vs. 5 V logic-level) and thermal layout adaptation for DPAK.

BUK725R0-40C,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: TrenchMOS™

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

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:: 5mOhm @ 25A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: 60 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 3820 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 157W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

BUK725R0-40C,118 FAQ

1.How can I place an order for BUK725R0-40C,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK725R0-40C,118 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 BUK725R0-40C,118 reliable?

The price and inventory of BUK725R0-40C,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK725R0-40C,118 is usually 5 days.

3.What payment methods are accepted for BUK725R0-40C,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK725R0-40C,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK725R0-40C,118?

BUK725R0-40C,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK725R0-40C,118 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 BUK725R0-40C,118?

For technical support, including BUK725R0-40C,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK725R0-40C,118 requirements.

6.How does Aetrix verify that BUK725R0-40C,118 is sourced from the original manufacturer or authorized distributors?

All BUK725R0-40C,118 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 BUK725R0-40C,118 meets industry standards.

7.What is the process for return or replacement of BUK725R0-40C,118?

All BUK725R0-40C,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK725R0-40C,118, 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 BUK725R0-40C,118 part is unused and in its original packaging.

Return procedure for BUK725R0-40C,118:

1.Submit a request within 90 days.

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

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