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

Nexperia USA Inc. BUK9637-100E,118

Name: BUK9637-100E,118
Brand: Nexperia USA Inc.
SKU: BUK9637-100E,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9637-100E,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

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

Datasheet:: BUK9637-100E,118.pdf

Description:: MOSFET N-CH 100V 31A D2PAK

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Product details

Overview

BUK9637-100E from Nexperia is an AEC-Q101 qualified N-channel TrenchMOS logic-level power MOSFET in SOT404 (D2PAK) package, rated for 100 V V_DS, 31 A continuous drain current at T_mb = 25 °C, and 96 W total power dissipation. It delivers 31 mΩ R_DS(on) at V_GS = 5 V and T_j = 25 °C, with true logic-level gate drive (V_GS(th) ≥ 0.5 V up to 175 °C), enabling direct interface with 3.3 V/5 V microcontrollers in automotive power switching.

For engineers reviewing the BUK9637-100E datasheet, BUK9637-100E pinout, BUK9637-100E application, or BUK9637-100E equivalent, key selection criteria include its 175 °C junction rating, repetitive avalanche capability, low R_DS(on) at logic-level gate drive, and qualification for start-stop micro-hybrid and transmission control systems.

Technical Context

This MOSFET employs TrenchMOS technology to achieve high current density and low conduction losses while maintaining robust thermal performance. Its gate threshold voltage remains functional across the full -55 °C to +175 °C junction range, and it features a mounting base thermally and electrically connected to the drain-enabling efficient heat transfer to PCB copper or heatsink.

The device supports unclamped inductive switching with 44 mJ single-pulse avalanche energy (ID = 31 A, V_sup ≤ 100 V), and exhibits low dynamic parameters: Q_GD = 9.3 nC, C_iss = 2681 pF (typ), and t_f = 35.1 ns-making it suitable for high-frequency PWM motor and solenoid control in 12 V/24 V/48 V automotive architectures.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - Maximum drain-source blocking voltage; supports 48 V automotive bus with margin for load dump transients.
I_D (continuous)	31 A at T_mb = 25 °C - Enables high-current switching without external heatsink in moderate-duty cycles.
R_DS(on)	31 mΩ typ at V_GS = 5 V, I_D = 10 A, T_j = 25 °C - Minimizes conduction loss (≤ 9.6 W at 17.5 A) in thermally constrained modules.
T_j max	175 °C - Allows operation in under-hood environments where ambient exceeds 125 °C.
Avalanche energy	44 mJ (non-repetitive, unclamped) - Withstands inductive kickback from motors/solenoids without external snubbers.
Q_GD	9.3 nC - Low gate-drain charge reduces Miller-induced switching delay and improves turn-off controllability.
R_th(j-mb)	1.56 K/W - Enables >60 W power handling with modest heatsinking via mounting base.

Pinout & Package

SOT404 (D2PAK) plastic single-ended surface-mounted package with 3 leads (one lead cropped); mounting base (mb) is electrically and thermally connected to the drain terminal.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Logic-level input controlling channel conduction; requires ≤5 V for full enhancement; V_GS(th) ≥ 0.5 V even at 175 °C.
2 (D)	Drain	Main high-side power path; internally bonded to mounting base for low-inductance, high-current routing and thermal conduction.
3 (S)	Source	Return path for load current; referenced to system ground; forms body diode anode with drain cathode.
mb	Mounting base	Electrically tied to drain; provides primary thermal interface to PCB copper pour or heatsink; critical for power derating.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard-suitable for safety-critical ECUs.
True logic-level gate	V_GS(th) ≥ 0.5 V at T_j = 175 °C ensures turn-on compatibility with 3.3 V MCU GPIOs without level-shifting circuitry.
Repetitive avalanche rated	Rated for repeated inductive switching events under controlled conditions-reduces need for external protection components.
175 °C junction rating	Enables placement in high-temperature zones (e.g., near engine bay electronics) without derating penalties below 150 °C ambient.
Low R_DS(on) × Q_G product	31 mΩ × 22.8 nC = 0.71 Ω·nC - Balances conduction and switching losses for high-efficiency 20–100 kHz PWM operation.

Applications

Start-Stop Micro-Hybrid Control

Transmission Solenoid Driver

Use Scenario: Controlling starter motor engagement/disengagement during engine auto-stop and restart cycles in 12 V/48 V mild hybrid vehicles.

IC Role / Device Role / Timing Role: High-side power switch interfacing directly with 5 V microcontroller output; handles peak currents up to 123 A (pulsed).

Use Value: Eliminates need for gate driver IC due to logic-level compatibility, reducing BOM count and PCB area while sustaining 175 °C junction temperature during repeated cranking events.

Use Scenario: Driving hydraulic solenoids in automatic transmission valve bodies requiring precise 12 V PWM current regulation.

IC Role / Device Role / Timing Role: Low-loss, fast-switching power stage delivering 31 A continuous current with <35 ns fall time for accurate duty-cycle control.

Use Value: Low R_DS(on) minimizes self-heating during sustained actuation; avalanche ruggedness absorbs back-EMF without snubber networks.

12 V/24 V Motor Control Module

LED Headlamp Power Switch

Use Scenario: Bidirectional DC motor control in HVAC blower or power seat modules using half-bridge topology.

IC Role / Device Role / Timing Role: Low-side or high-side switch in discrete H-bridge; leverages 1.56 K/W R_th(j-mb) for thermal management on 2 oz copper PCB.

Use Value: Mounting base connection enables direct thermal coupling to chassis ground plane, supporting >25 A RMS current in compact form factor.

Use Scenario: High-current on/off switching of LED headlamp arrays (e.g., adaptive driving beam segments) in ADB modules.

IC Role / Device Role / Timing Role: Primary power switch handling up to 31 A inrush and steady-state current; operates with 5 V MCU control signal.

Use Value: True logic-level gate ensures reliable turn-on at cold start (-40 °C) and hot soak (175 °C), eliminating gate driver dependency and improving system startup timing.

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, 3.2 mΩ R_DS(on) at V_GS = 10 V; requires 10 V gate drive for full enhancement.	Higher current capacity but not logic-level; needs gate driver for 3.3 V/5 V MCU interface.	Select when higher current and lower R_DS(on) justify added gate driver complexity and cost.
IRF3205PBF	55 V, 110 A, 8 mΩ R_DS(on) at V_GS = 10 V; non-AEC-Q101; no avalanche rating.	Limited to 55 V systems; unsuitable for 48 V automotive or load-dump tolerant designs.	Consider only for non-automotive industrial 12 V/24 V applications where qualification and ruggedness are not required.

Compared with STL220N10F7 and IRF3205PBF, BUK9637-100E uniquely combines AEC-Q101 qualification, true 5 V logic-level drive, 100 V rating, and repetitive avalanche capability-making it the only drop-in solution for space-constrained, thermally demanding automotive power switches without gate drivers.

Availability

BUK9637-100E is available at Aetrix Electronics and suitable for automotive start-stop systems, transmission control units, and LED headlamp power modules requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for BUK9637-100E 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 specializing in high-performance, high-reliability discrete and logic devices, with leadership in automotive-qualified MOSFETs and ESD protection.

The BUK9637-100E belongs to Nexperia's TrenchMOS logic-level automotive power MOSFET family, engineered specifically for thermally aggressive, safety-critical vehicle subsystems requiring robust switching, low gate-drive voltage, and extended temperature operation.

FAQ

Is BUK9637-100E compatible with 3.3 V microcontroller GPIOs?

Yes. Its gate-source threshold voltage is guaranteed ≥0.5 V at 175 °C junction temperature, and typical R_DS(on) is 31 mΩ at V_GS = 5 V-ensuring full enhancement with 3.3 V logic when used with appropriate gate resistor and layout. At 3.3 V, R_DS(on) increases to ~65 mΩ (per Fig. 7), which remains usable for moderate-current applications.

What is the maximum continuous drain current at 100 °C mounting base temperature?

Per Figure 2 in the datasheet, the continuous drain current is derated to 22 A at T_mb = 100 °C. This reflects thermal limits imposed by the 1.56 K/W junction-to-mounting-base resistance and 96 W P_tot rating at 25 °C.

Does BUK9637-100E have an integrated body diode, and what are its characteristics?

Yes. It features a source-drain body diode with forward voltage V_SD = 0.82–1.2 V at I_S = 10 A and T_j = 25 °C, reverse recovery time t_rr = 39.8 ns, and recovered charge Q_r = 70.6 nC. These values support fast freewheeling in inductive loads like solenoids and motors.

Can BUK9637-100E be used in parallel configurations?

Yes, but with design precautions. Its positive R_DS(on) temperature coefficient promotes current sharing, yet matching gate drive impedance and thermal coupling across paralleled devices is essential. Layout symmetry and individual gate resistors are recommended to avoid oscillation and uneven current distribution.

BUK9637-100E,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: TrenchMOS™

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 31A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V, 10V

Rds On (Max) @ Id, Vgs:: 36mOhm @ 10A, 10V

Vgs(th) (Max) @ Id:: 2.1V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 22.8 nC @ 5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 2681 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

BUK9637-100E,118 FAQ

1.How can I place an order for BUK9637-100E,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9637-100E,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 BUK9637-100E,118 reliable?

The price and inventory of BUK9637-100E,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9637-100E,118 is usually 5 days.

3.What payment methods are accepted for BUK9637-100E,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9637-100E,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9637-100E,118?

BUK9637-100E,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9637-100E,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 BUK9637-100E,118?

For technical support, including BUK9637-100E,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9637-100E,118 requirements.

6.How does Aetrix verify that BUK9637-100E,118 is sourced from the original manufacturer or authorized distributors?

All BUK9637-100E,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 BUK9637-100E,118 meets industry standards.

7.What is the process for return or replacement of BUK9637-100E,118?

All BUK9637-100E,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9637-100E,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 BUK9637-100E,118 part is unused and in its original packaging.

Return procedure for BUK9637-100E,118:

1.Submit a request within 90 days.

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

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