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

NXP Semiconductors BUK9635-100A,118

Name: BUK9635-100A,118
Brand: NXP Semiconductors
SKU: BUK9635-100A,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9635-100A,118

Manufacturer:: NXP Semiconductors

Category:: FETs, MOSFETs

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

Datasheet:: BUK9635-100A,118.pdf

Description:: MOSFET N-CH 100V 41A D2PAK

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Product details

Overview

BUK9635-100A from NXP Semiconductors is a logic-level N-channel TrenchMOS FET in D2PAK (SOT404) package, rated for 100 V V_DS, 41 A continuous drain current at 25 °C mounting base temperature, and 149 W total power dissipation. It features 30–35 mΩ R_DS(on) at V_GS = 5 V and T_j = 25 °C, AEC-Q101 qualification, and 175 °C maximum junction temperature - designed for automotive power switching of 12 V/24 V/42 V loads including motors, lamps, and solenoids.

For engineers reviewing the BUK9635-100A datasheet, BUK9635-100A pinout, BUK9635-100A application, or BUK9635-100A equivalent, key selection criteria include logic-level gate drive compatibility (V_GS(th) = 1.0–2.0 V), low R_DS(on) at 5 V drive, avalanche ruggedness (125 mJ), thermal resistance to mounting base (1 K/W), and AEC-Q101 compliance for automotive critical systems.

Technical Context

This device uses TrenchMOS technology to achieve low on-state resistance with logic-level gate drive capability, enabling direct interface with 3.3 V or 5 V microcontrollers without level-shifting circuitry. Its gate threshold voltage ranges from 0.5 V (at 175 °C) to 2.3 V (at –55 °C), ensuring reliable turn-on across automotive temperature extremes.

The integrated source-drain diode supports freewheeling in inductive load applications, with 0.85–1.2 V forward voltage at 25 A and 25 °C. Dynamic parameters include C_iss = 2660–3573 pF and fast switching times (t_d(on) = 10 ns, t_f = 108 ns), optimized for high-efficiency DC-DC and motor control topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - Maximum drain-source blocking voltage; supports 42 V automotive systems with ≥2× safety margin.
I_D (continuous)	41 A at T_mb = 25 °C - Sustains high-current loads like starter relays or HVAC blowers when properly heatsinked.
R_DS(on)	30–35 mΩ at V_GS = 5 V, T_j = 25 °C - Enables <1.5 W conduction loss at 25 A, reducing thermal stress in compact layouts.
Avalanche energy E_AS	125 mJ (unclamped) - Withstands inductive kickback from solenoids or brushed motors without external snubbers.
T_j max	175 °C - Rated for under-hood environments and thermally demanding locations without derating penalties.
R_th(j-mb)	1 K/W - Enables efficient heat transfer to PCB copper or external heatsink via mounting base (drain-connected).
V_GS(th)	1.0–2.0 V at T_j = 25 °C - Ensures full enhancement with standard 3.3 V or 5 V logic outputs.

Pinout & Package

Package: D2PAK (SOT404), plastic single-ended surface-mounted package with 3 leads (one lead cropped); mounting base electrically connected to drain for low-inductance thermal and power path.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Logic-level input controlling channel conduction; requires ≤10 V drive; gate leakage <100 nA ensures low standby current.
2 (D)	Drain	Main high-side power terminal; internally bonded to mounting base for thermal and electrical connection to heatsink.
3 (S)	Source	Power return path; referenced to system ground in low-side switch configurations; supports 41 A continuous current.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive safety-critical applications including engine control, body electronics, and ADAS power stages.
Logic-level gate drive	Operates fully enhanced with 3.3 V or 5 V MCU GPIOs - eliminates need for gate driver ICs in cost-sensitive designs.
Low R_DS(on) at 5 V	30–35 mΩ enables >95% efficiency in 24 V/25 A loads, reducing board-level thermal management complexity.
175 °C junction rating	Supports operation in under-hood modules without derating up to ambient 125 °C with proper thermal design.
Drain-connected mounting base	Provides low-impedance thermal path (R_th(j-mb) = 1 K/W) and reduces parasitic inductance in high-di/dt switching.

Applications

Automotive Body Control Module	12 V Starter Relay Replacement
Use Scenario: Electronic control of headlights, fog lamps, and interior lighting in modern BCMs. IC Role / Device Role / Timing Role: Low-side power switch driving resistive and inductive lamp loads. Use Value: Eliminates mechanical relay wear-out and contact bounce; supports PWM dimming with 108 ns fall time and low R_DS(on) for minimal self-heating.	Use Scenario: Solid-state replacement for electromechanical starter relays in 12 V battery systems. IC Role / Device Role / Timing Role: High-current, high-reliability main power switch activated by ignition signal. Use Value: Withstands 165 A peak drain current and 125 mJ unclamped avalanche energy during cranking transients without failure.
42 V Mild Hybrid DC-DC Converter	Commercial Vehicle Solenoid Driver
Use Scenario: Primary-side synchronous rectification in 42 V–12 V bidirectional DC-DC converters for mild hybrid architectures. IC Role / Device Role / Timing Role: High-efficiency, high-frequency power switch operating at 100 kHz+ with low C_oss (265–314 pF). Use Value: 30–35 mΩ R_DS(on) at 5 V drive enables >97% conversion efficiency while maintaining logic-level compatibility with controller ICs.	Use Scenario: Driving pneumatic/hydraulic solenoids in heavy-duty truck braking and suspension systems. IC Role / Device Role / Timing Role: Robust high-side or low-side switch handling inductive kickback and wide ambient temperature swings. Use Value: 175 °C junction rating and AEC-Q101 qualification ensure reliability in cab-external mounting locations exposed to extreme thermal cycling.

Automotive Body Control Module

12 V Starter Relay Replacement

Use Scenario: Electronic control of headlights, fog lamps, and interior lighting in modern BCMs.

IC Role / Device Role / Timing Role: Low-side power switch driving resistive and inductive lamp loads.

Use Value: Eliminates mechanical relay wear-out and contact bounce; supports PWM dimming with 108 ns fall time and low R_DS(on) for minimal self-heating.

Use Scenario: Solid-state replacement for electromechanical starter relays in 12 V battery systems.

IC Role / Device Role / Timing Role: High-current, high-reliability main power switch activated by ignition signal.

Use Value: Withstands 165 A peak drain current and 125 mJ unclamped avalanche energy during cranking transients without failure.

42 V Mild Hybrid DC-DC Converter

Commercial Vehicle Solenoid Driver

Use Scenario: Primary-side synchronous rectification in 42 V–12 V bidirectional DC-DC converters for mild hybrid architectures.

IC Role / Device Role / Timing Role: High-efficiency, high-frequency power switch operating at 100 kHz+ with low C_oss (265–314 pF).

Use Value: 30–35 mΩ R_DS(on) at 5 V drive enables >97% conversion efficiency while maintaining logic-level compatibility with controller ICs.

Use Scenario: Driving pneumatic/hydraulic solenoids in heavy-duty truck braking and suspension systems.

IC Role / Device Role / Timing Role: Robust high-side or low-side switch handling inductive kickback and wide ambient temperature swings.

Use Value: 175 °C junction rating and AEC-Q101 qualification ensure reliability in cab-external mounting locations exposed to extreme thermal cycling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N10F7	100 V, 220 A (T_c = 25 °C), R_DS(on) = 2.2 mΩ @ 10 V - higher current, lower R_DS(on), but requires 10 V gate drive.	Not logic-level compatible; unsuitable for direct 3.3 V/5 V MCU drive without gate driver.	Select only if gate driver IC is already present and higher current headroom is required.
IRF3205PBF	55 V, 110 A, R_DS(on) = 8 mΩ @ 10 V - lower voltage rating, not AEC-Q101 qualified, no 175 °C rating.	Limited to non-automotive 12 V systems; lacks automotive qualification and high-temp robustness.	Acceptable for industrial 12 V motor control where AEC-Q101 and 175 °C are not required.

Compared with STL220N10F7 and IRF3205PBF, the BUK9635-100A uniquely combines AEC-Q101 qualification, 100 V rating, logic-level gate drive, and 175 °C operation - making it the only drop-in solution for automotive 12 V/24 V/42 V power switching where reliability, temperature resilience, and MCU compatibility are jointly mandated.

Availability

BUK9635-100A is available at Aetrix Electronics and suitable for automotive body control modules, 12 V starter systems, and 42 V mild hybrid DC-DC converters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for BUK9635-100A 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The BUK9635-100A belongs to NXP's TrenchMOS logic-level automotive power MOSFET family, engineered specifically for high-reliability, thermally demanding automotive power switching applications requiring AEC-Q101 compliance and extended temperature operation.

FAQ

What is the maximum gate-source voltage rating for BUK9635-100A?

The BUK9635-100A has a continuous gate-source voltage rating of ±10 V and a peak pulsed rating of ±15 V (tp ≤50 µs). Exceeding ±10 V continuously risks gate oxide degradation; design must ensure gate drive circuits remain within this limit during all operating and transient conditions. The BUK9635-100A datasheet specifies V_GS = –10 V to +10 V as the absolute maximum continuous range.

Is BUK9635-100A suitable for high-frequency PWM motor control?

Yes - the BUK9635-100A supports high-frequency PWM with t_d(on) = 10 ns, t_f = 108 ns, and C_iss = 2660–3573 pF, enabling efficient operation up to 200 kHz in brushed DC motor drives. Its low R_DS(on) minimizes conduction losses, while avalanche ruggedness handles inductive flyback. The BUK9635-100A is commonly used in automotive HVAC blower and seat motor controllers.

Does BUK9635-100A have an integrated body diode, and what are its characteristics?

Yes - the BUK9635-100A includes an inherent source-drain diode with V_SD = 0.85–1.2 V at I_S = 25 A and T_j = 25 °C, and reverse recovery time t_rr = 68 ns. This diode enables freewheeling in inductive loads and supports synchronous rectification topologies. The BUK9635-100A diode is rated for 41 A continuous and 165 A pulsed source current.

What thermal interface requirements apply to the mounting base of BUK9635-100A?

The mounting base of the BUK9635-100A is electrically connected to the drain and serves as the primary thermal path. For optimal performance, it must be soldered to ≥100 mm² of 2 oz copper with thermal vias to internal planes or attached to an external heatsink using thermally conductive adhesive or mechanical clamp. The BUK9635-100A achieves R_th(j-mb) = 1 K/W only when the mounting base is properly thermally coupled.

How does BUK9635-100A perform at elevated junction temperatures?

R_DS(on) increases with temperature: 30–35 mΩ at 25 °C rises to ≤88 mΩ at T_j = 175 °C (V_GS = 5 V, I_D = 25 A). Gate threshold voltage decreases from 2.0 V (25 °C) to 0.5 V (175 °C), improving turn-on margin but requiring attention to shoot-through risk in half-bridge configurations. The BUK9635-100A remains fully functional across its –55 °C to +175 °C junction range.

BUK9635-100A,118 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: TrenchMOS™

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 41A (Tc)

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

Rds On (Max) @ Id, Vgs:: 34mOhm @ 25A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 3573 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 149W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

BUK9635-100A,118 FAQ

1.How can I place an order for BUK9635-100A,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9635-100A,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 BUK9635-100A,118 reliable?

The price and inventory of BUK9635-100A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9635-100A,118 is usually 5 days.

3.What payment methods are accepted for BUK9635-100A,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9635-100A,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9635-100A,118?

BUK9635-100A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9635-100A,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 BUK9635-100A,118?

For technical support, including BUK9635-100A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9635-100A,118 requirements.

6.How does Aetrix verify that BUK9635-100A,118 is sourced from the original manufacturer or authorized distributors?

All BUK9635-100A,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 BUK9635-100A,118 meets industry standards.

7.What is the process for return or replacement of BUK9635-100A,118?

All BUK9635-100A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9635-100A,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 BUK9635-100A,118 part is unused and in its original packaging.

Return procedure for BUK9635-100A,118:

1.Submit a request within 90 days.

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

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