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

Nexperia USA Inc. BUK7620-55A,118

Name: BUK7620-55A,118
Brand: Nexperia USA Inc.
SKU: BUK7620-55A,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK7620-55A,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

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

Datasheet:: BUK7620-55A,118.pdf

Description:: MOSFET N-CH 55V 54A D2PAK

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Product details

Overview

BUK7620-55A from Nexperia is a standard-level N-channel TrenchMOS FET in D2PAK (SOT404) package, rated for 55 V V_DS, 54 A continuous drain current at T_mb = 25 °C, and 40 mΩ R_DS(on) at T_j = 175 °C. It delivers low conduction loss, AEC-Q101 qualification, and 175 °C junction operation-designed for automotive 12 V/24 V power switching of motors, lamps, and solenoids.

For engineers reviewing the BUK7620-55A datasheet, BUK7620-55A pinout, BUK7620-55A application, or BUK7620-55A equivalent, key selection criteria include its standard-level gate drive compatibility (V_GS(th) = 2–4 V), avalanche ruggedness (115 mJ), thermal resistance (R_th(j-mb) = 1.2 K/W), and mounting-base–referenced power dissipation capability.

Technical Context

This device uses TrenchMOS technology to achieve low R_DS(on) with robust thermal performance: R_th(j-mb) = 1.2 K/W enables high-power switching on thermally constrained PCBs or heatsinks. Its 175 °C maximum junction temperature and Q101 qualification confirm suitability for under-hood automotive environments.

The FET features unclamped inductive switching capability (E_DS(AL)S = 115 mJ at ID = 48 A), fast switching dynamics (t_d(on) = 15 ns, t_f = 40 ns), and integrated source-drain diode with V_SD = 0.85 V at 20 A and t_rr = 45 ns-supporting efficient freewheeling in motor and relay drive circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V - Maximum drain-source blocking voltage compatible with 12 V/24 V automotive systems with transient margin.
I_D (continuous)	54 A at T_mb = 25 °C - High-current capability enabled by low thermal resistance and D2PAK package mounting base.
R_DS(on)	17–20 mΩ at T_j = 25 °C; 40 mΩ at T_j = 175 °C - Low conduction loss across full operating temperature range.
E_DS(AL)S	115 mJ - Avalanche energy rating supports reliable unclamped inductive load switching without external snubbers.
V_GS(th)	2–4 V at T_j = 25 °C - Standard-level gate threshold ensures compatibility with 3.3 V/5 V microcontroller outputs.
R_th(j-mb)	1.2 K/W - Junction-to-mounting-base thermal resistance enables direct heatsink attachment for high-power thermal management.
t_rr	45 ns - Fast reverse recovery time of internal body diode reduces switching losses in freewheeling applications.

Pinout & Package

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; requires ≤20 V gate-source voltage; threshold 2–4 V enables standard logic-level drive.
2 (D)	Drain	Main high-side power terminal; internally bonded to mounting base for low-inductance, high-current conduction and thermal conduction.
3 (S)	Source	Power return path; referenced to system ground in low-side switch configurations; carries full load current.
Mounting Base (mb)	Drain Connection / Thermal Interface	Electrically tied to drain; provides mechanical attachment and primary thermal path to heatsink or copper plane (R_th(j-mb) = 1.2 K/W).

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive critical applications including engine control, lighting, and chassis systems.
175 °C maximum junction temperature	Enables operation in under-hood environments without derating in high-ambient thermal conditions.
Low R_DS(on) with TrenchMOS	17–20 mΩ at 25 °C and 40 mΩ at 175 °C minimizes I²R losses in high-current DC loads.
Integrated source-drain diode	V_SD = 0.85 V at 20 A and t_rr = 45 ns supports efficient freewheeling in inductive switching circuits.
Standard-level gate drive	V_GS(th) = 2–4 V allows direct interface with 3.3 V/5 V MCUs without level-shifting circuitry.

Applications

Automotive Lighting Control

Engine Cooling Fan Drive

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

IC Role / Device Role / Timing Role: Low-side power switch managing up to 54 A peak lamp current with fast turn-on/off timing.

Use Value: 40 mΩ R_DS(on) at 175 °C ensures minimal thermal rise during sustained duty cycles; 115 mJ avalanche rating handles lamp inrush transients.

Use Scenario: Variable-speed control of brushless DC cooling fans in engine bay with ambient temperatures up to 125 °C.

IC Role / Device Role / Timing Role: High-current, thermally robust MOSFET in half-bridge or high-side configuration driving fan windings.

Use Value: R_th(j-mb) = 1.2 K/W enables direct heatsink mounting; 175 °C rating maintains reliability under hood thermal stress.

12 V/24 V Solenoid Actuation

Commercial Vehicle Starter Relay Replacement

Use Scenario: Solid-state replacement for electromechanical relays controlling fuel injectors, transmission solenoids, or ABS valves.

IC Role / Device Role / Timing Role: Fast-switching N-channel FET delivering precise pulse-width modulated current to inductive solenoid coils.

Use Value: 45 ns t_rr and 115 mJ E_DS(AL)S suppress voltage spikes during coil de-energization without external clamping diodes.

Use Scenario: High-reliability electronic replacement for starter motor engagement relays in trucks and buses using 24 V battery systems.

IC Role / Device Role / Timing Role: Main power switch handling 200+ A peak cranking currents via pulsed operation (IDM = 217 A).

Use Value: 217 A peak drain current and 118 W P_tot support short-duration cranking surges while maintaining AEC-Q101 compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP55NF06L	60 V V_DS, 50 A I_D, 14 mΩ R_DS(on) @ 25 °C, TO-220 package, non-AEC qualified	Lacks automotive qualification; higher R_DS(on) drift with temperature; no mounting base thermal path	Preferred for cost-sensitive industrial 12 V switching where AEC-Q101 is not required.
IRF3205PBF	55 V V_DS, 110 A I_D, 8 mΩ R_DS(on) @ 25 °C, TO-220, non-AEC qualified, lower avalanche rating (65 mJ)	Higher peak current but lower thermal robustness; lacks 175 °C rating and automotive qualification	Suitable for high-current benchtop or non-automotive power supplies where ambient temperature remains <105 °C.

Compared with STP55NF06L and IRF3205PBF, BUK7620-55A trades marginal R_DS(on) advantage for guaranteed automotive reliability, superior thermal interface via mounting base, and validated avalanche performance-making it the only qualified choice for production automotive power nodes.

Availability

BUK7620-55A is available at Aetrix Electronics and suitable for automotive lighting control, engine cooling fan drive, and 12 V/24 V solenoid actuation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for BUK7620-55A 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 semiconductor expert specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.

BUK7620-55A belongs to Nexperia's TrenchMOS automotive power portfolio, engineered specifically for thermally demanding, safety-critical 12 V/24 V automotive power switching applications requiring AEC-Q101 compliance and robust avalanche performance.

FAQ

Is BUK7620-55A suitable for high-side switching configurations?

No-BUK7620-55A is an N-channel MOSFET with source terminal referenced to ground in standard layout. High-side switching requires either a P-channel device or an N-channel with gate-drive voltage boosted above the supply rail. Its D2PAK mounting base is tied to drain, making it unsuitable for floating high-side use without isolated gate drive.

What is the maximum allowable gate-source voltage during operation?

The absolute maximum V_GS is ±20 V per datasheet limiting values. For reliable long-term operation, gate drive should be limited to 10–15 V, as R_DS(on) is fully enhanced at V_GS = 10 V and higher voltages increase gate oxide stress without meaningful on-resistance improvement.

Does BUK7620-55A require an external flyback diode when driving inductive loads?

No-its integrated source-drain diode has V_SD = 0.85 V at 20 A and t_rr = 45 ns, enabling effective freewheeling in most 12 V/24 V inductive applications. However, for high-frequency PWM or high dI/dt scenarios, an external Schottky diode may further reduce losses and EMI.

How does the mounting base connection affect PCB layout and thermal design?

The mounting base is electrically connected to the drain and must be soldered to a large copper pour or heatsink. This establishes the primary thermal path (R_th(j-mb) = 1.2 K/W) and requires isolation from other nets. Layout must avoid routing signal traces beneath the base and ensure ≥2 mm clearance from adjacent grounded planes to prevent arcing at 55 V.

BUK7620-55A,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:: 54A (Tc)

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

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

Vgs(th) (Max) @ Id:: 4V @ 1mA

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

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1592 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 118W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

BUK7620-55A,118 FAQ

1.How can I place an order for BUK7620-55A,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK7620-55A,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 BUK7620-55A,118 reliable?

The price and inventory of BUK7620-55A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7620-55A,118 is usually 5 days.

3.What payment methods are accepted for BUK7620-55A,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7620-55A,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK7620-55A,118?

BUK7620-55A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK7620-55A,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 BUK7620-55A,118?

For technical support, including BUK7620-55A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7620-55A,118 requirements.

6.How does Aetrix verify that BUK7620-55A,118 is sourced from the original manufacturer or authorized distributors?

All BUK7620-55A,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 BUK7620-55A,118 meets industry standards.

7.What is the process for return or replacement of BUK7620-55A,118?

All BUK7620-55A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7620-55A,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 BUK7620-55A,118 part is unused and in its original packaging.

Return procedure for BUK7620-55A,118:

1.Submit a request within 90 days.

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

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