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

Nexperia USA Inc. BUK9614-55A,118

Name: BUK9614-55A,118
Brand: Nexperia USA Inc.
SKU: BUK9614-55A,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9614-55A,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

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

Datasheet:: BUK9614-55A,118.pdf

Description:: MOSFET N-CH 55V 73A D2PAK

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Inventory:6,680

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Product details

Overview

BUK9614-55A,118 from Nexperia is a logic-level N-channel TrenchMOS FET in D2PAK (SOT404) package, rated for 55 V drain-source voltage, 73 A continuous drain current at 25 °C mounting base temperature, and 149 W total power dissipation. It features 12 mΩ typical 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 12 V/24 V load switching including motors, lamps, and solenoids.

For engineers reviewing the BUK9614-55A,118 datasheet, BUK9614-55A,118 pinout, BUK9614-55A,118 application, or BUK9614-55A,118 equivalent, key selection criteria include logic-level gate drive compatibility (V_GS(th) = 1.5 V typ), thermal robustness (R_th(j-mb) = 1 K/W), avalanche energy rating (230 mJ), and automotive-grade reliability under thermally demanding conditions.

Technical Context

This device implements a trench-gate MOSFET structure optimized for low conduction loss and fast switching in high-current DC power paths. Its gate threshold voltage (1.5 V typ at 25 °C, down to 0.5 V at 175 °C) ensures reliable turn-on with standard 3.3 V or 5 V logic controllers, while its 1 K/W junction-to-mounting-base thermal resistance enables high-power operation without forced cooling when mounted on copper heatsinks.

The integrated source-drain diode exhibits 0.85 V forward voltage at 20 A and 25 °C, with 62 ns reverse recovery time and 121 nC recovered charge - enabling efficient freewheeling in inductive loads. Dynamic parameters include 2510 pF input capacitance and 290 pF reverse transfer capacitance at 25 V, supporting stable gate driving in motor control and solenoid actuation circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V maximum - supports 24 V automotive systems with ≥2× safety margin against load dump transients
I_D (continuous)	73 A at T_mb = 25 °C - delivers high-current switching for starter relays or HVAC blowers without external heatsink
R_DS(on)	12 mΩ typ @ V_GS = 5 V, I_D = 25 A, T_j = 25 °C - limits conduction loss to ≤2.25 W at 30 A, reducing thermal stress
E_AS	230 mJ non-repetitive avalanche energy - withstands inductive kickback from 73 A solenoid de-energization without failure
T_j(max)	175 °C - enables operation in engine bay environments where ambient exceeds 125 °C
R_th(j-mb)	1 K/W - allows direct mounting to chassis or heatsink for efficient heat extraction in space-constrained modules
V_GS(th)	1.5 V typ @ T_j = 25 °C - ensures full enhancement with 3.3 V microcontroller GPIO, eliminating level-shifter need

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Logic-level control input; accepts 3.3 V/5 V drive directly from MCU; 100 nA max gate leakage at 25 °C
2 (D)	Drain	Main power output node; internally bonded to mounting base for low-impedance current return and thermal conduction
3 (S)	Source	Power ground reference; forms low-side switch configuration; internal source inductance 7.5 nH minimizes switching ringing
Mounting base (mb)	Drain extension	Electrically tied to drain pin; provides primary thermal interface and mechanical anchoring; requires solderable copper area ≥10.3 mm × 9.7 mm

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	V_GS(th) range 0.5–2.3 V across -55 to +175 °C ensures consistent turn-on with standard microcontroller outputs
Low R_DS(on) at 5 V	12–15 mΩ at V_GS = 4.5–5 V enables efficient 12 V/24 V load switching without gate boost circuitry
High avalanche ruggedness	230 mJ unclamped E_AS protects against inductive energy during fault events in motor/solenoid drivers
175 °C junction rating	Supports operation in under-hood locations where PCB temperature reaches 150 °C, extending system lifetime

Applications

Engine Cooling Fan Control

Automotive Headlamp Switching

Use Scenario: PWM-controlled 12 V brushless fan module in engine compartment, subject to ambient up to 150 °C and vibration.

IC Role / Device Role / Timing Role: Low-side power switch handling up to 60 A peak current; operates in 10–20 kHz PWM mode with <166 ns turn-off delay.

Use Value: 12 mΩ R_DS(on) limits resistive loss to <2.2 W at full load, while 175 °C rating avoids derating in high-temp zones.

Use Scenario: High-beam/lower-beam lamp switching in headlamp ECU, requiring hot-plug capability and short-circuit protection.

IC Role / Device Role / Timing Role: Robust N-channel switch placed between lamp load and chassis ground; handles 10 A steady-state and 30 A inrush.

Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle life; 230 mJ avalanche rating absorbs lamp filament surge.

Transmission Solenoid Driver

Body Control Module Power Distribution

Use Scenario: 24 V transmission pressure control solenoid actuated by BCM, operating continuously at 125 °C ambient.

IC Role / Device Role / Timing Role: High-current, thermally hardened switch delivering precise current pulses; gate driven by 5 V DAC output.

Use Value: 1 K/W R_th(j-mb) enables direct heatsink mounting; V_GS(th) stability across temperature prevents drift in closed-loop current control.

Use Scenario: Centralized 12 V power distribution unit managing 8–12 loads (windows, locks, mirrors) with diagnostic feedback.

IC Role / Device Role / Timing Role: Individually controllable low-side switch per load; supports load-dump transient suppression and open-load detection.

Use Value: Logic-level compatibility simplifies MCU interface; 55 V rating covers ISO 7637-2 pulse 5a (120 V transient) with margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4LF5AG	40 V V_DS, 220 A I_D, TO-220FP package, R_DS(on) = 1.2 mΩ @ 10 V - higher current but lower voltage rating and non-AEC-Q101	Not suitable for 24 V automotive systems due to insufficient V_DS margin; better for 12 V battery-fed industrial actuators	Select only if system voltage ≤16 V and AEC qualification is not required; verify thermal design for TO-220FP footprint
IRF1404ZLPBF	40 V V_DS, 180 A I_D, TO-220AB package, R_DS(on) = 3.7 mΩ @ 10 V - no logic-level drive (V_GS(th) = 2–4 V), not AEC-Q101 qualified	Requires gate driver for reliable 3.3 V MCU control; lacks automotive qualification and thermal ruggedness for under-hood use	Use only in non-automotive 12 V applications with gate driver support and ambient <105 °C

Compared with STL220N4LF5AG and IRF1404ZLPBF, BUK9614-55A,118 uniquely combines AEC-Q101 compliance, 55 V rating, true logic-level gate drive, and 175 °C operation - making it the only drop-in solution for thermally aggressive automotive 12 V/24 V load switching without external level-shifting or derating.

Availability

BUK9614-55A,118 is available at Aetrix Electronics and suitable for automotive body control modules, engine management subsystems, and commercial vehicle power distribution systems requiring stable component supply across extended product lifecycles.

Supply support for BUK9614-55A,118 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, logic, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging.

BUK9614-55A,118 belongs to Nexperia's TrenchMOS automotive logic-level FET product line, engineered specifically for robust, low-loss power switching in harsh-temperature automotive environments - emphasizing AEC-Q101 compliance, thermal resilience, and gate-drive simplicity.

FAQ

Is BUK9614-55A,118 suitable for 24 V commercial vehicle applications?

Yes. With 55 V V_DS rating, AEC-Q101 qualification, and 175 °C junction temperature limit, it safely handles ISO 16750-2 load dump transients (up to 35 V for 400 ms) and sustained operation in truck/trailer ECUs exposed to elevated ambient temperatures.

What is the recommended PCB layout for thermal performance?

Use ≥10.3 mm × 9.7 mm copper pad connected to internal ground plane via ≥6 thermal vias (0.3 mm diameter, 0.8 mm pitch), solder the mounting base fully, and avoid silkscreen or solder mask over the pad. This achieves near-spec R_th(j-mb) = 1 K/W and prevents thermal throttling at 73 A.

Does BUK9614-55A,118 require a gate resistor for MCU-driven switching?

A 10 Ω series gate resistor is recommended per datasheet test conditions (td(on)/td(off) characterization). It suppresses ringing, controls dV/dt, and protects the MCU GPIO from capacitive inrush current - especially critical at 2510 pF C_iss and high-frequency PWM.

Can this FET replace older BUK9514-55A designs?

Yes. BUK9614-55A,118 shares identical pinout, package (SOT404), and electrical specifications with BUK9514-55A but offers improved R_DS(on) consistency and updated AEC-Q101 requalification. No layout or firmware changes are needed for drop-in replacement.

BUK9614-55A,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:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 73A (Tc)

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

Rds On (Max) @ Id, Vgs:: 13mOhm @ 25A, 10V

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

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

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 3307 pF @ 25 V

FET Feature:: -

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

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

BUK9614-55A,118 FAQ

1.How can I place an order for BUK9614-55A,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9614-55A,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 BUK9614-55A,118 reliable?

The price and inventory of BUK9614-55A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9614-55A,118 is usually 5 days.

3.What payment methods are accepted for BUK9614-55A,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9614-55A,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9614-55A,118?

BUK9614-55A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9614-55A,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 BUK9614-55A,118?

For technical support, including BUK9614-55A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9614-55A,118 requirements.

6.How does Aetrix verify that BUK9614-55A,118 is sourced from the original manufacturer or authorized distributors?

All BUK9614-55A,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 BUK9614-55A,118 meets industry standards.

7.What is the process for return or replacement of BUK9614-55A,118?

All BUK9614-55A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9614-55A,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 BUK9614-55A,118 part is unused and in its original packaging.

Return procedure for BUK9614-55A,118:

1.Submit a request within 90 days.

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

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