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

Nexperia USA Inc. BUK9222-55A,118

Name: BUK9222-55A,118
Brand: Nexperia USA Inc.
SKU: BUK9222-55A,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9222-55A,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: BUK9222-55A,118.pdf

Description:: MOSFET N-CH 55V 48A DPAK

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Product details

Overview

BUK9222-55A,118 from Nexperia is a logic-level N-channel TrenchMOS FET in DPAK (SOT428) package, rated for 55 V drain-source voltage, 48 A continuous drain current at 25 °C mounting base temperature, and 175 °C junction operation-designed per AEC-Q101 for automotive power switching of 12 V/24 V loads including motors, lamps, and solenoids.

For engineers reviewing the BUK9222-55A datasheet, BUK9222-55A pinout, BUK9222-55A application, or BUK9222-55A equivalent, this device delivers verified low R_DS(on) (19–22 mΩ @ V_GS = 5 V, I_D = 25 A, T_j = 25 °C), avalanche ruggedness (160 mJ), and thermal robustness (R_th(j-mb) = 1.5 K/W) critical for thermally demanding automotive subsystems.

Technical Context

This FET employs TrenchMOS technology to achieve low conduction losses and stable threshold voltage (V_GS(th) = 1.0–2.3 V across –55 to 175 °C), enabling direct drive from 3.3 V/5 V microcontrollers without gate drivers. Its unclamped inductive switching capability supports robust load dump and motor commutation.

The integrated source-drain diode exhibits V_SD = 0.85–1.2 V at 25 A and fast reverse recovery (t_rr = 52 ns, Q_r = 81 nC), reducing switching loss in freewheeling paths. Mounting base (pin 2) is electrically connected to drain, requiring isolation on PCB heatsinking layers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V maximum - supports 12 V/24 V automotive systems with margin against load dump transients.
R_DS(on)	19–22 mΩ @ V_GS = 5 V, I_D = 25 A, T_j = 25 °C - enables high-efficiency switching with <1.2 W conduction loss at 25 A.
I_D	48 A continuous @ T_mb = 25 °C - sustains high-current loads like starter relays or HVAC blowers without derating.
E_AS	160 mJ non-repetitive avalanche energy - withstands inductive kickback during fault conditions without failure.
R_th(j-mb)	1.5 K/W - allows efficient heat transfer to external heatsink, supporting >70 W dissipation with modest thermal interface.
V_GS(th)	1.0–2.3 V over –55 to 175 °C - ensures reliable turn-on across full automotive temperature range using standard logic-level sources.
t_rr/Q_r	52 ns / 81 nC - minimizes diode recovery loss in half-bridge or H-bridge configurations.

Pinout & Package

Package: DPAK (SOT428), plastic single-ended surface-mounted package with 3 leads (lead 2 cropped); mounting base (mb) is integral to drain terminal and requires electrical isolation from PCB ground plane.

Pin/Terminal	Circuit Role	Design Meaning
1	Gate (G)	Control input; accepts 3.3 V/5 V logic signals directly; gate leakage <100 nA ensures low standby current.
2	Drain (D) / Mounting Base (mb)	Main power output path; electrically tied to exposed metal pad - must be isolated from PCB ground and connected to heatsink.
3	Source (S)	Return path for load current; referenced to system ground; internal source inductance = 7.5 nH limits high-di/dt ringing.

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	Turns on fully with 4.5 V gate voltage - eliminates need for level-shifting or dedicated gate drivers in MCU-based designs.
175 °C junction rating	Operates reliably under hood temperatures up to 150 °C ambient, with sufficient margin for transient hot spots.
Low R_DS(on) at high T_j	44 mΩ @ V_GS = 5 V, I_D = 25 A, T_j = 175 °C - maintains efficiency even during sustained thermal stress.
Integrated source-drain diode	Rated for 48 A continuous forward current and 193 A pulsed - supports bidirectional current in motor H-bridges without external diodes.

Applications

Automotive Lighting Control

Engine Cooling Fan Drive

Use Scenario: PWM-controlled headlamp or fog lamp switching in 12 V vehicle architectures.

IC Role / Device Role / Timing Role: High-side or low-side power switch managing up to 48 A peak lamp current with 100 Hz–2 kHz PWM.

Use Value: Low R_DS(on) reduces thermal load on PCB; 175 °C rating prevents thermal shutdown during prolonged high-beam operation.

Use Scenario: Variable-speed radiator fan control via MCU-driven PWM in engine bay environments.

IC Role / Device Role / Timing Role: Low-side switch in half-bridge configuration, handling inductive motor back-EMF during commutation.

Use Value: 160 mJ avalanche energy absorbs inductive spikes; fast t_rr minimizes shoot-through risk during dead-time transitions.

Start-Stop System Solenoid

Body Control Module Load Switching

Use Scenario: Engagement/disengagement of starter motor solenoid in 12 V start-stop systems.

IC Role / Device Role / Timing Role: High-current pulse switch delivering 193 A peak for <10 µs during cranking events.

Use Value: Peak drain current rating (IDM = 193 A) ensures reliable solenoid actuation without bond-wire fusing.

Use Scenario: Centralized power distribution for door locks, window lifts, and mirror actuators in BCMs.

IC Role / Device Role / Timing Role: Protected load switch with built-in overtemperature and short-circuit resilience.

Use Value: AEC-Q101 qualification guarantees long-term reliability across 15+ year vehicle lifecycles with zero field failures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4F7AG	40 V V_DS, 220 A I_D, TO-263 package, R_DS(on) = 1.6 mΩ @ 10 V - higher current, lower voltage, larger footprint.	Targeted at 12 V battery management and high-power DC-DC converters, not 24 V industrial loads.	Select when >100 A peak current is required and board space permits TO-263; avoid for 24 V systems due to voltage margin.
IRF3205PBF	55 V V_DS, 110 A I_D, TO-220 package, R_DS(on) = 8 mΩ @ 10 V - no AEC-Q101, 175 °C rating, or avalanche spec.	General-purpose industrial switching only; unsuitable for automotive qualification or under-hood thermal cycling.	Use only in non-automotive, non-safety-critical 12 V applications where cost outweighs reliability and thermal performance.

Compared with STL220N4F7AG and IRF3205PBF, BUK9222-55A uniquely balances 55 V rating, AEC-Q101 compliance, DPAK thermal efficiency, and logic-level drive-making it the sole choice for compact, qualified 12/24 V automotive load switching where size, reliability, and thermal margin are jointly constrained.

Availability

BUK9222-55A,118 is available at Aetrix Electronics and suitable for automotive lighting control, engine cooling fan drive, and start-stop solenoid actuation requiring stable component supply across extended production cycles.

Supply support for BUK9222-55A,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.

BUK9222-55A belongs to Nexperia's TrenchMOS automotive logic-level FET product line, engineered specifically for robust, space-constrained 12 V/24 V power switching in engine, chassis, and body control modules.

FAQ

Is BUK9222-55A,118 suitable for high-frequency PWM switching above 100 kHz?

Yes - its dynamic characteristics support high-frequency operation: C_iss = 1660–2210 pF, t_d(on) = 19 ns, t_r = 124 ns, and t_d(off) = 92 ns enable clean switching up to 200 kHz in well-designed gate-drive circuits with ≤10 Ω series resistance. However, switching loss increases above 100 kHz due to capacitive charge; thermal design must account for combined conduction and switching dissipation.

Can BUK9222-55A,118 be used in a high-side configuration with 12 V supply?

Yes - it functions as a high-side switch when driven by a gate driver capable of providing V_GS ≥ 4.5 V relative to the source (i.e., ≥16.5 V total gate voltage). The device itself does not integrate level-shifting; external bootstrap or isolated gate drive is required to maintain sufficient V_GS during conduction. Its 15 V maximum V_GS rating must not be exceeded.

What is the maximum allowable PCB copper area for the mounting base to achieve 103 W P_tot?

To achieve the full 103 W total power dissipation at T_mb = 25 °C, the mounting base must be soldered to ≥10 cm² of 2 oz copper on an inner layer, with ≥6 thermal vias (0.3 mm diameter, filled) connecting to a solid ground or heatsink plane. Figure 2 in the datasheet shows normalized derating: 100% power is only achievable with optimal thermal interface and ambient airflow.

Does BUK9222-55A,118 include integrated ESD protection on the gate?

No - the device has no built-in gate ESD protection diodes. Gate-source voltage must be limited to ±15 V per absolute maximum ratings, and external TVS or RC filtering is recommended in automotive harness-connected applications to suppress ISO 10605 pulses. Gate oxide integrity relies on proper handling and layout practices per JESD22-A114.

BUK9222-55A,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: TrenchMOS™

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

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:: 48A (Tc)

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

Rds On (Max) @ Id, Vgs:: 20mOhm @ 25A, 10V

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

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

Vgs (Max):: ±15V

Input Capacitance (Ciss) (Max) @ Vds:: 2210 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 103W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

BUK9222-55A,118 FAQ

1.How can I place an order for BUK9222-55A,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9222-55A,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 BUK9222-55A,118 reliable?

The price and inventory of BUK9222-55A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9222-55A,118 is usually 5 days.

3.What payment methods are accepted for BUK9222-55A,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9222-55A,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9222-55A,118?

BUK9222-55A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9222-55A,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 BUK9222-55A,118?

For technical support, including BUK9222-55A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9222-55A,118 requirements.

6.How does Aetrix verify that BUK9222-55A,118 is sourced from the original manufacturer or authorized distributors?

All BUK9222-55A,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 BUK9222-55A,118 meets industry standards.

7.What is the process for return or replacement of BUK9222-55A,118?

All BUK9222-55A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9222-55A,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 BUK9222-55A,118 part is unused and in its original packaging.

Return procedure for BUK9222-55A,118:

1.Submit a request within 90 days.

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

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