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

Nexperia USA Inc. BUK7631-100E,118

Name: BUK7631-100E,118
Brand: Nexperia USA Inc.
SKU: BUK7631-100E,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7631-100E,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: BUK7631-100E,118.pdf

Description:: NEXPERIA BUK7631 - TRANSISTOR >3

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Product details

Overview

BUK7631-100E from Nexperia is an AEC-Q101-qualified N-channel TrenchMOS standard-level power MOSFET in SOT404 (D2PAK) package, rated for 100 V V_DS, 34 A continuous drain current at T_mb = 25 °C, and 96 W total power dissipation. It delivers 24.3 mΩ typical R_DS(on) at V_GS = 10 V and T_j = 25 °C, with true standard-level gate drive (V_GS(th) > 1 V at 175 °C), enabling direct microcontroller interfacing in automotive motor and solenoid control.

For engineers reviewing the BUK7631-100E datasheet, BUK7631-100E pinout, BUK7631-100E application, or BUK7631-100E equivalent, this device supports thermally demanding 12V/24V/48V automotive systems requiring repetitive avalanche capability, 175 °C junction operation, and low-inductance switching performance verified per IEC 60134 limiting values.

Technical Context

This MOSFET employs TrenchMOS technology to achieve low R_DS(on) while maintaining robust avalanche ruggedness (39.4 mJ unclamped single-pulse) and stable threshold voltage across -55 °C to 175 °C. Its gate charge profile (Q_G(tot) = 29.4 nC, Q_GD = 10.7 nC) enables fast switching with controlled dV/dt and reduced Miller-induced turn-off delay.

The device integrates a monolithic source-drain diode with 36 ns reverse recovery time and 58.7 nC recovered charge, supporting synchronous rectification and freewheeling in high-frequency DC-DC and motor drive topologies. Thermal resistance from junction to mounting base is 1.56 K/W, confirming suitability for PCB-mounted heatsinking in space-constrained automotive modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V maximum - supports full 48V automotive bus transients without derating.
I_D (continuous)	34 A at T_mb = 25 °C - enables high-current load switching without external heatsink in moderate ambient.
R_DS(on)	24.3 mΩ typ @ V_GS = 10 V, T_j = 25 °C - minimizes conduction loss in 12V starter relays and transmission solenoids.
Q_GD	10.7 nC - reduces Miller plateau duration and improves hard-switching efficiency in 20–100 kHz power stages.
T_j max	175 °C - allows operation in engine bay environments without thermal shutdown under sustained load.
E_AS	39.4 mJ unclamped avalanche energy - provides intrinsic overvoltage protection during inductive load turn-off.
R_th(j-mb)	1.56 K/W - enables direct thermal coupling to metal-core PCB or heatsink for stable power delivery.

Pinout & Package

SOT404 (D2PAK) plastic single-ended surface-mounted package with 3 leads (one lead cropped); mounting base (mb) electrically connected to drain and serves as primary thermal path.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Standard-level input accepting 10 V logic drive; V_GS(th) remains >1 V even at 175 °C junction temperature.
2 (D)	Drain	Main high-side power terminal; internally bonded to mounting base for low-inductance, high-current return path.
3 (S)	Source	Power return node; referenced for gate drive and current sensing; forms cathode of integrated body diode.
mb	Mounting Base	Electrically tied to drain; provides mechanical attachment and dominant thermal conduction path to heatsink or PCB copper.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per ISO 10605.
Repetitive avalanche rating	Rated for repeated unclamped inductive switching events without degradation, critical for solenoid drivers.
175 °C junction rating	Enables deployment in under-hood ECUs and transmission control units without thermal throttling.
True standard-level gate	V_GS(th) > 1 V at 175 °C ensures reliable turn-on with 3.3 V or 5 V MCU GPIOs across full temperature range.
Low internal inductance	L_D = 2.5 nH, L_S = 7.5 nH - suppresses voltage overshoot and ringing during fast switching in motor drives.

Applications

Engine Start-Stop Control

Transmission Solenoid Driver

Use Scenario: High-reliability switching of starter motor engagement solenoids in micro-hybrid vehicles with frequent cold cranking cycles.

IC Role / Device Role / Timing Role: Main power switch controlling 12V solenoid coil current up to 34 A peak, operating at ambient temperatures up to 125 °C.

Use Value: Repetitive avalanche capability absorbs inductive kickback without external snubbers; 175 °C rating prevents thermal shutdown during extended cranking.

Use Scenario: Precision PWM control of hydraulic pressure solenoids in 8-speed automatic transmissions requiring fast, low-loss switching.

IC Role / Device Role / Timing Role: Low-R_DS(on) power FET delivering 20 A continuous current at 100 Hz–1 kHz PWM frequencies with minimal self-heating.

Use Value: 24.3 mΩ R_DS(on) reduces conduction loss by >30% vs. legacy TO-220 devices; low Q_GD enables clean edge transitions and reduced EMI.

12V/24V Lighting Module

48V Mild-Hybrid DC-DC Converter

Use Scenario: High-side switching of LED headlamps and matrix lighting arrays in ADAS-equipped vehicles with strict EMC requirements.

IC Role / Device Role / Timing Role: High-side load switch managing up to 15 A lamp current with fast turn-on/turn-off for dynamic beam shaping.

Use Value: Integrated source-drain diode with 36 ns t_rr supports freewheeling without external Schottky; low C_oss (145–174 pF) minimizes switching loss at 200 kHz.

Use Scenario: Synchronous rectifier in bidirectional 48V–12V DC-DC converters for mild-hybrid energy recovery and battery management.

IC Role / Device Role / Timing Role: Secondary-side power FET conducting up to 30 A continuous current with <100 ns switching transitions in phase-shifted full-bridge topology.

Use Value: 1.56 K/W R_th(j-mb) enables direct heatsink mounting on converter module baseplate; 100 V rating covers worst-case 48V bus transients (ISO 7637-2 Pulse 5a).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N10F7	100 V, 220 A, 3.2 mΩ R_DS(on) in PowerFLAT 5x6; higher current, lower R_DS(on), but requires gate driver due to logic-level threshold.	Better suited for high-power DC-DC converters where board space permits larger package and driver IC integration.	Select when >100 A peak current or <5 mΩ conduction loss is required; not drop-in due to different pinout and drive requirements.
IRF1405PBF	55 V, 169 A, 5.3 mΩ R_DS(on) in TO-220AB; lower voltage rating, higher current, no AEC-Q101 qualification.	Applicable only in non-automotive 12V industrial motor drives where qualification and 100 V margin are not mandatory.	Choose only for cost-sensitive non-automotive designs; lacks 175 °C rating, avalanche spec, and automotive qualification.

Compared with STL220N10F7 and IRF1405PBF, BUK7631-100E uniquely balances AEC-Q101 compliance, 100 V rating, standard-level gate drive, and SOT404 thermal performance-making it optimal for space-constrained, thermally aggressive automotive body and chassis modules without gate driver overhead.

Availability

BUK7631-100E is available at Aetrix Electronics and suitable for automotive engine control, transmission actuation, and 48V mild-hybrid power conversion requiring stable component supply across long production lifecycles.

Supply support for BUK7631-100E 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 high-volume, high-reliability discrete and logic components, with leadership in automotive-qualified MOSFETs, ESD protection, and logic families.

BUK7631-100E belongs to Nexperia's TrenchMOS automotive power portfolio, engineered specifically for thermally demanding, safety-critical vehicle subsystems requiring AEC-Q101 validation and robust avalanche performance.

FAQ

Is BUK7631-100E qualified for automotive use?

Yes. BUK7631-100E is fully AEC-Q101 qualified and designed for high-performance automotive applications including start-stop systems, transmission control, and 12V/24V/48V power distribution. It meets stringent requirements for temperature cycling, humidity testing, and high-temperature reverse bias life testing per the AEC standard.

What is the maximum continuous drain current at elevated mounting base temperature?

At T_mb = 100 °C, the continuous drain current is derated to 24 A (per Table 5). This reflects thermal limitation of the SOT404 package; operation above this requires active cooling or pulse-width reduction to maintain junction temperature ≤175 °C.

Does BUK7631-100E require a gate driver IC?

No. Its standard-level gate threshold (V_GS(th) > 1 V at 175 °C) and 10 V gate drive requirement allow direct interface with 3.3 V or 5 V microcontrollers and ASICs without external level-shifting or driver circuitry-reducing BOM count and layout complexity.

How does its avalanche ruggedness compare to non-automotive MOSFETs?

BUK7631-100E is specified for repetitive avalanche operation with 39.4 mJ unclamped single-pulse energy (T_j(init) = 25 °C). Unlike generic industrial MOSFETs, this rating is validated per AEC-Q101 and supports reliable inductive load switching in automotive solenoids and motors without external clamping.

BUK7631-100E,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: TrenchMOS™

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

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:: 34A (Tc)

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

Rds On (Max) @ Id, Vgs:: 31mOhm @ 10A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: 29.4 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1738 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 96W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

BUK7631-100E,118 FAQ

1.How can I place an order for BUK7631-100E,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7631-100E,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 BUK7631-100E,118 reliable?

The price and inventory of BUK7631-100E,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7631-100E,118 is usually 5 days.

3.What payment methods are accepted for BUK7631-100E,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7631-100E,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7631-100E,118?

BUK7631-100E,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7631-100E,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 BUK7631-100E,118?

For technical support, including BUK7631-100E,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7631-100E,118 requirements.

6.How does Aetrix verify that BUK7631-100E,118 is sourced from the original manufacturer or authorized distributors?

All BUK7631-100E,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 BUK7631-100E,118 meets industry standards.

7.What is the process for return or replacement of BUK7631-100E,118?

All BUK7631-100E,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7631-100E,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 BUK7631-100E,118 part is unused and in its original packaging.

Return procedure for BUK7631-100E,118:

1.Submit a request within 90 days.

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

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