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

NXP Semiconductors BUK9611-55A,118

Name: BUK9611-55A,118
Brand: NXP Semiconductors
SKU: BUK9611-55A,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9611-55A,118

Manufacturer:: NXP Semiconductors

Category:: FETs, MOSFETs

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

Datasheet:: BUK9611-55A,118.pdf

Description:: MOSFET N-CH 55V 75A D2PAK

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Product details

Overview

BUK9611-55A from Nexperia is an AEC-Q101-qualified N-channel TrenchMOS logic-level power MOSFET in D2PAK (SOT404) package, rated for 55 V V_DS, 75 A I_D at T_mb = 25 °C, and 175 °C junction temperature - designed for automotive 12 V/24 V load switching including motors, lamps, and solenoids.

For engineers reviewing the BUK9611-55A datasheet, BUK9611-55A pinout, BUK9611-55A application, or BUK9611-55A equivalent, key selection criteria include R_DS(on) ≤ 11 mΩ at V_GS = 5 V and T_j = 25 °C, avalanche energy rating of 330 mJ, and thermal resistance R_th(j-mb) = 0.9 K/W - critical for thermally constrained automotive power stages.

Technical Context

This device uses TrenchMOS technology to achieve low on-state resistance with logic-level gate drive compatibility (V_GS(th) = 1.0–2.0 V at T_j = 25 °C), enabling direct interfacing with 3.3 V or 5 V microcontrollers without level-shifting circuitry.

It features a robust unclamped inductive switching capability (E_DS(AL)S = 330 mJ), integrated source-drain diode with V_SD = 0.85–1.2 V at I_S = 25 A, and optimized dynamic parameters including C_iss = 3080–4230 pF and t_d(off) = 191 ns - supporting efficient high-frequency PWM control in motor drives.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V maximum drain-source voltage - supports 24 V automotive systems with margin against load-dump transients.
R_DS(on)	≤11 mΩ at V_GS = 5 V, I_D = 25 A, T_j = 25 °C - enables low conduction loss in high-current switching paths.
I_D	75 A continuous drain current at T_mb = 25 °C - suitable for high-power solenoid and lamp drivers.
T_j max	175 °C maximum junction temperature - ensures reliable operation in under-hood environments.
E_DS(AL)S	330 mJ non-repetitive avalanche energy - provides robustness against inductive kickback in motor and relay loads.
R_th(j-mb)	0.9 K/W thermal resistance from junction to mounting base - enables high-power dissipation when mounted on heatsinked PCBs.
V_GS(th)	1.0–2.0 V typical gate threshold voltage at T_j = 25 °C - guarantees turn-on with standard logic-level signals.

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal accepting logic-level voltage (≤10 V); requires <100 nA leakage current at ±10 V.
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 to system ground in low-side switch configurations.
Mounting base (mb)	Drain connection / thermal interface	Electrically tied to drain; must be soldered to copper pour or heatsink for thermal management and EMI reduction.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-critical applications including engine control, body electronics, and ADAS power stages.
Logic-level gate drive	Guaranteed turn-on with 4.5 V V_GS; eliminates need for external gate drivers in 5 V MCU-based designs.
175 °C junction rating	Enables operation in under-hood locations without derating in ambient temperatures up to 125 °C.
Low R_DS(on) at elevated T_j	R_DS(on) ≤ 22 mΩ at V_GS = 5 V, I_D = 25 A, T_j = 175 °C - maintains efficiency across full operating range.
Integrated source-drain diode	V_SD = 0.85–1.2 V at I_S = 25 A, T_j = 25 °C - supports freewheeling in inductive loads without external diode.

Applications

Automotive Body Control Module	12 V/24 V DC Motor Drive
Use Scenario: Switching door locks, seat adjusters, and HVAC actuators in modern vehicle body control units. IC Role / Device Role / Timing Role: High-side or low-side power switch controlling 12 V inductive loads with PWM duty cycling. Use Value: AEC-Q101 qualification and 175 °C rating ensure reliability in sealed, thermally isolated BCM enclosures.	Use Scenario: Driving brushed DC fans, radiator cooling pumps, and wiper motors in passenger vehicles. IC Role / Device Role / Timing Role: Low-side switching element handling peak currents up to 266 A in pulsed operation. Use Value: 330 mJ avalanche energy rating protects against back-EMF during motor commutation and stall events.
LED Headlamp Power Stage	Industrial Solenoid Driver
Use Scenario: Regulating current to high-brightness LED arrays in adaptive front-lighting systems (AFS). IC Role / Device Role / Timing Role: Constant-current switch operating at 100–500 Hz PWM frequencies with fast turn-off (t_f = 139 ns). Use Value: Low C_oss (520–650 pF) and Crss (350–480 pF) minimize switching losses and EMI in high-frequency dimming.	Use Scenario: Controlling hydraulic valves and pneumatic actuators in agricultural and construction equipment. IC Role / Device Role / Timing Role: High-current (75 A continuous) power switch interfaced with industrial PLC outputs. Use Value: R_th(j-mb) = 0.9 K/W allows direct mounting to metal chassis, eliminating discrete heatsinks in ruggedized enclosures.

Automotive Body Control Module

12 V/24 V DC Motor Drive

Use Scenario: Switching door locks, seat adjusters, and HVAC actuators in modern vehicle body control units.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling 12 V inductive loads with PWM duty cycling.

Use Value: AEC-Q101 qualification and 175 °C rating ensure reliability in sealed, thermally isolated BCM enclosures.

Use Scenario: Driving brushed DC fans, radiator cooling pumps, and wiper motors in passenger vehicles.

IC Role / Device Role / Timing Role: Low-side switching element handling peak currents up to 266 A in pulsed operation.

Use Value: 330 mJ avalanche energy rating protects against back-EMF during motor commutation and stall events.

LED Headlamp Power Stage

Industrial Solenoid Driver

Use Scenario: Regulating current to high-brightness LED arrays in adaptive front-lighting systems (AFS).

IC Role / Device Role / Timing Role: Constant-current switch operating at 100–500 Hz PWM frequencies with fast turn-off (t_f = 139 ns).

Use Value: Low C_oss (520–650 pF) and Crss (350–480 pF) minimize switching losses and EMI in high-frequency dimming.

Use Scenario: Controlling hydraulic valves and pneumatic actuators in agricultural and construction equipment.

IC Role / Device Role / Timing Role: High-current (75 A continuous) power switch interfaced with industrial PLC outputs.

Use Value: R_th(j-mb) = 0.9 K/W allows direct mounting to metal chassis, eliminating discrete heatsinks in ruggedized enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N5LF8AG	60 V V_DS, 220 A I_D, TO-LL8 package, R_DS(on) = 1.2 mΩ @ 10 V - higher current, lower R_DS(on), but requires 10 V gate drive.	Targeted at high-efficiency 48 V mild-hybrid systems; not logic-level compatible.	Select only if gate drive voltage ≥10 V is available and higher current capacity is required.
IRF1405PBF	55 V V_DS, 169 A I_D, TO-220 package, R_DS(on) = 5.3 mΩ @ 10 V - higher current, lower R_DS(on), but V_GS(th) = 2–4 V and no AEC-Q101 qualification.	General-purpose industrial switching; lacks automotive qualification and thermal performance at high T_j.	Use only in non-automotive, non-safety-critical applications where AEC-Q101 is not mandated.

Compared with STL220N5LF8AG and IRF1405PBF, the BUK9611-55A uniquely combines AEC-Q101 compliance, true logic-level operation (≤5 V turn-on), and 175 °C capability - making it the only drop-in solution for thermally demanding automotive 12 V/24 V load switching where gate drive voltage is constrained and qualification is mandatory.

Availability

BUK9611-55A is available at Aetrix Electronics and suitable for automotive body electronics, industrial solenoid control, and 12 V/24 V DC motor drives requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for BUK9611-55A 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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products business, with deep expertise in automotive-qualified components.

The BUK9611-55A belongs to Nexperia's TrenchMOS logic-level automotive power MOSFET family, engineered specifically for robust, high-current switching in thermally aggressive automotive environments.

FAQ

What is the maximum gate-source voltage rating for BUK9611-55A?

The BUK9611-55A 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. This specification is confirmed in Table 4 (Limiting Values) of the official Nexperia datasheet Rev. 2, and applies directly to the BUK9611-55A device under all operating conditions.

Is BUK9611-55A qualified for automotive applications?

Yes, the BUK9611-55A is explicitly AEC-Q101 qualified, as stated in Section 1.2 (Features and benefits) and validated per automotive stress test standards. It is designed and qualified for use in automotive critical applications, including under-hood and cabin modules where reliability at 175 °C junction temperature is required - a key requirement for the BUK9611-55A product profile.

What is the typical R_DS(on) of BUK9611-55A at 5 V gate drive?

The typical R_DS(on) of BUK9611-55A is 9–11 mΩ at V_GS = 5 V, I_D = 25 A, and T_j = 25 °C, as specified in Table 6 (Characteristics) of the datasheet. This value is measured under standardized conditions and defines the conduction loss baseline for logic-level drive in the BUK9611-55A.

Does BUK9611-55A have an integrated body diode?

Yes, the BUK9611-55A includes an integrated source-drain diode with forward voltage V_SD = 0.85–1.2 V at I_S = 25 A and T_j = 25 °C, as documented in Table 6. This diode supports freewheeling current in inductive loads and is characterized for reverse recovery time (t_rr = 77 ns) and recovered charge (Q_r = 230 nC), both critical for the BUK9611-55A's motor and solenoid applications.

What package type does BUK9611-55A use?

The BUK9611-55A uses the D2PAK (SOT404) plastic single-ended surface-mounted package with three leads (one lead cropped), as confirmed in Table 3 (Ordering information) and Figure 15 (Package outline). The mounting base is electrically connected to the drain and serves as the primary thermal interface - a defining mechanical and thermal feature of the BUK9611-55A package.

BUK9611-55A,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):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 75A (Tc)

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

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

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

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

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 4230 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 166W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

BUK9611-55A,118 FAQ

1.How can I place an order for BUK9611-55A,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9611-55A,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 BUK9611-55A,118 reliable?

The price and inventory of BUK9611-55A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9611-55A,118 is usually 5 days.

3.What payment methods are accepted for BUK9611-55A,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9611-55A,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9611-55A,118?

BUK9611-55A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9611-55A,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 BUK9611-55A,118?

For technical support, including BUK9611-55A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9611-55A,118 requirements.

6.How does Aetrix verify that BUK9611-55A,118 is sourced from the original manufacturer or authorized distributors?

All BUK9611-55A,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 BUK9611-55A,118 meets industry standards.

7.What is the process for return or replacement of BUK9611-55A,118?

All BUK9611-55A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9611-55A,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 BUK9611-55A,118 part is unused and in its original packaging.

Return procedure for BUK9611-55A,118:

1.Submit a request within 90 days.

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

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