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

Nexperia USA Inc. BUK9620-55A,118

Name: BUK9620-55A,118
Brand: Nexperia USA Inc.
SKU: BUK9620-55A,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9620-55A,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

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

Datasheet:: BUK9620-55A,118.pdf

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

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Product details

Overview

BUK9620-55A from Nexperia is a logic-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 175 °C junction temperature. It delivers 15–18 mΩ R_DS(on) at V_GS = 10 V and ID = 25 A, with AEC-Q101 qualification for automotive power switching in 12 V/24 V systems.

For engineers reviewing the BUK9620-55A datasheet, BUK9620-55A pinout, BUK9620-55A application, or BUK9620-55A equivalent, key selection criteria include logic-level gate drive compatibility (V_GS(th) = 1.0–2.0 V), thermal robustness (R_th(j-mb) = 1.2 K/W), avalanche energy rating (115 mJ), and automotive-grade reliability under thermally demanding conditions.

Technical Context

This device uses TrenchMOS technology to achieve low on-resistance and fast switching with minimal gate charge (Q_G ≈ 30–40 nC typical). Its gate threshold voltage (V_GS(th)) remains stable across -55 °C to 175 °C, enabling reliable turn-on with 4.5 V–5 V logic sources without level-shifting circuitry.

The integrated source-drain diode exhibits V_SD = 0.85–1.2 V at I_S = 25 A and T_j = 25 °C, with t_rr = 52 ns and Q_r = 81 nC - supporting moderate-frequency freewheeling in inductive loads like solenoids and DC motors.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V maximum - supports 12 V/24 V automotive bus with margin against load-dump transients.
R_DS(on)	15–18 mΩ at V_GS = 10 V, I_D = 25 A, T_j = 25 °C - enables <1.2 W conduction loss at 50 A.
I_D (cont)	54 A at T_mb = 25 °C - requires heatsinking but sustains high-current motor/solenoid drive without derating.
E_AS	115 mJ unclamped avalanche energy - withstands inductive kickback without external snubbers in relay/motor control.
T_j max	175 °C - allows operation in engine bay or under-hood environments with minimal thermal margin loss.
R_th(j-mb)	1.2 K/W - enables efficient heat transfer to PCB copper or heatsink via mounting base (drain-connected).
V_GS(th)	1.0–2.0 V at T_j = 25 °C - ensures full enhancement with standard 3.3 V/5 V microcontroller GPIO outputs.

Pinout & Package

Package: D2PAK (SOT404), plastic surface-mount with isolated mounting base electrically connected to drain. Dimensions per IEC JEDEC outline: 15.8 × 10.3 × 4.5 mm (L × W × H), with 2.54 mm lead pitch and cropped lead configuration.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal; accepts 0–10 V logic-level drive; 2–100 nA leakage at ±10 V.
2 (D)	Drain	Main power input; tied internally to mounting base for low-inductance thermal path and high-current routing.
3 (S)	Source	Power return; referenced to system ground; carries full load current and reverse diode conduction.
mb	Mounting Base	Electrically connected to drain; serves as primary thermal interface and structural anchor to heatsink or PCB copper pour.

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) ≤ 2.0 V and R_DS(on) ≤ 20 mΩ at V_GS = 4.5 V enable direct MCU GPIO control without gate drivers.
175 °C junction rating	Enables uninterrupted operation in under-hood environments where ambient exceeds 125 °C and thermal cycling is severe.
Low R_DS(on) × Q_G figure of merit	~18 mΩ × 35 nC = 0.63 Ω·nC - balances conduction efficiency and switching speed for 10–100 kHz PWM.
Drain-connected mounting base	Reduces thermal resistance to 1.2 K/W and minimizes parasitic inductance (<2.5 nH) for high-di/dt switching stability.

Applications

Automotive Door Lock Actuator

12 V Engine Cooling Fan Control

Use Scenario: Driving 12 V solenoid-based door lock mechanism with peak current up to 45 A and 100 ms pulse duration.

IC Role / Device Role / Timing Role: High-side power switch controlling solenoid coil energization; operates in on/off mode with <100 µs turn-on delay.

Use Value: Low V_GS(th) ensures reliable activation from 3.3 V CAN/LIN microcontroller; 115 mJ avalanche rating absorbs coil flyback without external diode.

Use Scenario: PWM-controlled 12 V brush DC cooling fan delivering 30–50 A during thermal overload events.

IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration; handles 20 kHz PWM with <100 ns fall time.

Use Value: 15 mΩ R_DS(on) limits conduction loss to <2.3 W at 50 A; 175 °C rating prevents thermal shutdown during sustained high-load operation.

24 V Commercial Vehicle Headlamp Relay

Truck HVAC Blower Motor Driver

Use Scenario: Replacing electromechanical relay in 24 V headlamp circuit handling 20 A steady-state and 60 A inrush.

IC Role / Device Role / Timing Role: Solid-state replacement for relay contact; switched by vehicle body control module (BCM) GPIO.

Use Value: Eliminates contact wear and bounce; 55 V V_DS accommodates 24 V system transients up to ISO 7637-2 Pulse 5a (75 V).

Use Scenario: Controlling variable-speed blower motor in heavy-duty truck HVAC system with 24 V supply and 40 A max load.

IC Role / Device Role / Timing Role: High-current MOSFET in linear or PWM mode; mounted directly to aluminum chassis for thermal management.

Use Value: Drain-connected mounting base provides 1.2 K/W thermal path to chassis; 175 °C rating maintains function during cabin temperature excursions >85 °C.

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
STP55NF06L	60 V V_DS, 50 A I_D, R_DS(on) = 14 mΩ @ 10 V, but only 150 °C T_j max and no AEC-Q101 qualification.	Not approved for automotive safety-critical use; suitable for industrial 24 V motor drives where qualification is not mandated.	Select when cost sensitivity outweighs automotive qualification requirements and thermal margin is sufficient.
IRF1404ZLPbF	40 V V_DS, 180 A I_D, R_DS(on) = 3.7 mΩ @ 10 V, but V_GS(th) = 2–4 V - requires ≥5 V gate drive for full enhancement.	Limited to 12 V systems due to lower breakdown voltage; higher current rating suits high-power fans but lacks logic-level compatibility.	Choose for non-automotive 12 V high-current applications where gate drive voltage ≥5 V is available and 40 V margin is acceptable.

Compared with STP55NF06L and IRF1404ZLPbF, the BUK9620-55A uniquely combines AEC-Q101 qualification, 55 V rating, true logic-level gate drive (≤2 V threshold), and 175 °C operation - making it the only option among the three qualified for under-hood automotive switching where reliability, thermal resilience, and low-voltage drive coexist.

Availability

BUK9620-55A is available at Aetrix Electronics and suitable for automotive door lock actuation, 12 V/24 V engine cooling fan control, and commercial vehicle headlamp switching requiring stable component supply across extended production lifecycles.

Supply support for BUK9620-55A 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 focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

The BUK9620-55A belongs to Nexperia's TrenchMOS logic-level power MOSFET product line, engineered specifically for automotive power switching applications demanding AEC-Q101 compliance, high-temperature operation, and direct microcontroller interfacing.

FAQ

Is BUK9620-55A suitable for high-frequency PWM switching above 50 kHz?

No - while its td(off) = 92 ns and tf = 93 ns support moderate-speed switching, the relatively high C_iss (1660–2210 pF) and Q_G (~35 nC) increase gate drive power and switching losses above 50 kHz. It is optimized for 1–20 kHz motor/solenoid control, not RF or SMPS applications.

Can BUK9620-55A be used in a high-side configuration with 12 V supply?

Yes - its V_GS rating of ±10 V and V_GS(th) ≤ 2.0 V allow high-side operation with a bootstrap gate driver or dedicated high-side controller. However, the mounting base is tied to drain, so thermal interface design must accommodate floating potential.

What is the maximum safe operating area (SOA) at T_mb = 100 °C?

At T_mb = 100 °C, the continuous drain current is derated to 38 A (per Table 4), and the SOA curve (Figure 3) shows that at V_DS = 30 V, the device supports ≤15 A DC or ≤60 A for 100 µs pulses. Operation beyond these limits risks thermal runaway or avalanche failure.

Does the source-drain diode support synchronous rectification?

No - the body diode has V_SD = 0.85–1.2 V and t_rr = 52 ns, which is too slow and lossy for synchronous rectification in DC-DC converters. It is intended only for freewheeling in inductive loads, not for high-efficiency bidirectional conduction.

BUK9620-55A,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):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 18mOhm @ 25A, 10V

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

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

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 2210 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

BUK9620-55A,118 FAQ

1.How can I place an order for BUK9620-55A,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9620-55A,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 BUK9620-55A,118 reliable?

The price and inventory of BUK9620-55A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9620-55A,118 is usually 5 days.

3.What payment methods are accepted for BUK9620-55A,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9620-55A,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9620-55A,118?

BUK9620-55A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9620-55A,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 BUK9620-55A,118?

For technical support, including BUK9620-55A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9620-55A,118 requirements.

6.How does Aetrix verify that BUK9620-55A,118 is sourced from the original manufacturer or authorized distributors?

All BUK9620-55A,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 BUK9620-55A,118 meets industry standards.

7.What is the process for return or replacement of BUK9620-55A,118?

All BUK9620-55A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9620-55A,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 BUK9620-55A,118 part is unused and in its original packaging.

Return procedure for BUK9620-55A,118:

1.Submit a request within 90 days.

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

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