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

Nexperia USA Inc. BUK4D72-30X

Name: BUK4D72-30X
Brand: Nexperia USA Inc.
SKU: BUK4D72-30X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK4D72-30X

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: 6-UDFN Exposed Pad

Datasheet:: BUK4D72-30X.pdf

Description:: BUK4D72-30X

Quantity:: RFQ Add To RFQ list

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Inventory:6,092

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Product details

Overview

BUK4D72-30X from Nexperia is a 30 V, N-channel enhancement-mode Trench MOSFET in a DFN2020MD-6 (SOT1220) leadless package, designed for low-side load switching and high-speed line driving. It delivers R_DS(on) = 55 mΩ (typ) at V_GS = 4.5 V, supports I_D = 3.8 A continuous drain current at T_amb = 25 °C, and operates up to T_j = 175 °C. Its AEC-Q101 qualification and side-wettable flanks support automotive and industrial PCB assembly.

For engineers reviewing the BUK4D72-30X datasheet, BUK4D72-30X pinout, BUK4D72-30X application, or BUK4D72-30X equivalent, key selection criteria include its ultra-thin 2 × 2 × 0.65 mm footprint, 1.5 kV HBM ESD rating, thermal resistance R_th(j-sp) = 12 K/W, gate charge Q_G(tot) = 3 nC (typ), and guaranteed avalanche energy of 6.2 mJ.

Technical Context

This MOSFET uses Trench technology to achieve low on-resistance and fast switching with minimal gate drive requirements. Its threshold voltage V_GS(th) = 0.75–1.25 V enables reliable turn-on with 2.5 V–4.5 V logic-level signals, and its dynamic parameters-Q_GD = 0.9 nC, C_iss = 255 pF, t_r = 20 ns-support high-frequency switching in compact power stages.

The device integrates an intrinsic body diode with V_SD = 0.8–1.2 V at I_S = 1.9 A and t_rr = 12.6 ns, enabling efficient freewheeling in inductive loads. Its thermal design leverages the DFN2020MD-6's solderable side pads and 6 cm² drain pad to sustain P_tot = 10 W at T_sp = 25 °C while maintaining junction temperatures within AEC-Q101 limits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V maximum - defines safe blocking capability in 24 V automotive and industrial bus applications
R_DS(on)	55 mΩ typ at V_GS = 4.5 V, I_D = 3.8 A - enables <170 mW conduction loss at full rated current
I_D	3.8 A continuous at T_amb = 25 °C - supports robust low-side switching in space-constrained PCBs
Q_G(tot)	3 nC typ - reduces gate drive power and allows use with low-current microcontroller GPIOs
T_j max	175 °C - ensures operation in under-hood automotive environments and sealed industrial enclosures
ESD Rating	1500 V HBM - eliminates need for external ESD protection in board-level handling and assembly
R_th(j-sp)	12 K/W typical - enables direct thermal coupling to PCB copper for passive cooling without heatsinks

Pinout & Package

DFN2020MD-6 (SOT1220) is a 2 mm × 2 mm × 0.65 mm leadless, thermally enhanced plastic package with side-wettable flanks for optical solder inspection. Its exposed drain terminals provide low-inductance, high-current paths and superior thermal transfer to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 5, 6, 7	Drain (D)	Five parallel drain terminals - reduce package inductance and spread heat across large PCB copper area
3	Gate (G)	Single gate input - compatible with standard 3.3 V/5 V logic drivers; low Q_G minimizes switching losses
4, 8	Source (S)	Two source terminals - provide low-impedance return path and improve current sharing in high-di/dt switching

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock
Side-wettable flanks	Enables automated optical inspection (AOI) of solder joints without X-ray, reducing manufacturing QA cost
Extended T_j range	Rated for continuous operation up to 175 °C - eliminates derating concerns in high-ambient environments
Trench MOSFET architecture	Delivers lower R_DS(on) per die area than planar MOSFETs - improves power density in miniaturized designs
Ultra-thin profile	0.65 mm height - enables stacking in multi-layer modules and integration into slim consumer or medical enclosures

Applications

Relay Driver

High-Speed Line Driver

Use Scenario: Replacing electromechanical relays in automotive body control modules (BCM) and industrial PLC I/O cards.

IC Role / Device Role / Timing Role: Low-side switch controlling 12 V/24 V relay coils with fast turn-on/turn-off to suppress contact arcing.

Use Value: Eliminates coil flyback voltage spikes via integrated body diode recovery (t_rr = 12.6 ns), reducing snubber component count by 30%.

Use Scenario: Driving terminated RS-485 or CAN FD bus lines in automotive infotainment head units and ADAS domain controllers.

IC Role / Device Role / Timing Role: High-speed digital output stage delivering >10 Mbps edge rates with controlled slew via low C_iss/C_oss ratio.

Use Value: Achieves <20 ns rise/fall times with Q_GD = 0.9 nC and R_DS(on) < 72 mΩ, minimizing signal distortion on 120 Ω differential lines.

Low-Side Load Switch

Switching Power Supply

Use Scenario: Hot-swap and inrush current limiting for USB-C PD ports and 5 V/3.3 V auxiliary rails in automotive telematics units.

IC Role / Device Role / Timing Role: Controlled power path switch with soft-start enabled by gate capacitance and external RC timing.

Use Value: Supports 3.8 A steady-state load with <170 mW conduction loss and 1.95 W thermal budget at T_amb = 100 °C.

Use Scenario: Synchronous rectifier in 30 V-input buck converters for ADAS camera modules and radar power supplies.

IC Role / Device Role / Timing Role: Secondary-side switch replacing Schottky diodes to reduce forward voltage drop and improve efficiency.

Use Value: Delivers 0.8–1.2 V V_SD and 6.2 mJ unclamped avalanche energy, enabling robust operation during transient overloads.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN3026LSD-13	R_DS(on) = 26 mΩ @ 4.5 V but in larger SO-8 package (4.9 × 6.0 mm); higher Q_G = 8.5 nC	Requires more PCB area and higher gate drive current; better suited for non-space-constrained industrial SMPS	Select when lower R_DS(on) outweighs size and thermal constraints
PMV30UN2	R_DS(on) = 45 mΩ @ 4.5 V in same DFN2020MD-6 package but rated only to T_j = 150 °C and not AEC-Q101 qualified	Lacks automotive qualification and high-temp margin; suitable for commercial-grade consumer power management	Select for cost-sensitive non-automotive designs where 175 °C operation is unnecessary

Compared with DMN3026LSD-13 and PMV30UN2, BUK4D72-30X uniquely balances ultra-compact size, AEC-Q101 compliance, and 175 °C operation-making it the only option for space-limited, high-reliability automotive switching where thermal headroom and qualification are non-negotiable.

Availability

BUK4D72-30X is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and USB-C power delivery systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BUK4D72-30X 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 and logic devices, with leadership in automotive-qualified MOSFETs and ESD protection solutions.

The BUK4D72-30X belongs to Nexperia's TrenchMOS® automotive-qualified power MOSFET family, engineered specifically for low-R_DS(on), high-temperature robustness, and manufacturability in lead-free reflow processes.

FAQ

What is the maximum continuous drain current at 100 °C ambient temperature?

The BUK4D72-30X supports I_D = 2.4 A continuous at T_amb = 100 °C, as specified in Table 5 (Limiting Values). This derating reflects thermal dissipation limits on standard FR4 PCBs with single-sided 6 cm² drain copper, and aligns with the normalized current curve in Figure 2.

Does the BUK4D72-30X require a gate resistor for 3.3 V MCU drive?

No external gate resistor is required for basic turn-on with 3.3 V microcontrollers, as V_GS(th) = 0.75–1.25 V ensures reliable enhancement. However, a 10–22 Ω series resistor is recommended to dampen ringing caused by low gate impedance and parasitic inductance in high-di/dt layouts.

How does the side-wettable flank design impact solder joint inspection?

The tin-plated side pads enable automated optical inspection (AOI) of solder fillets without X-ray, verifying wetting quality and voiding on all six terminals. This eliminates manual visual checks and reduces field failure risk in high-volume automotive assembly lines.

Is the body diode suitable for synchronous rectification in DC-DC converters?

Yes-the intrinsic source-drain diode has V_SD = 0.8–1.2 V at I_S = 1.9 A and t_rr = 12.6 ns, making it viable for low-voltage synchronous rectification. Its 6.2 mJ unclamped avalanche rating also provides margin against inductive kickback during light-load transitions.

BUK4D72-30X Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 6-UDFN Exposed Pad

Packaging:: Bulk

Product Status:: Obsolete

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

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

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

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

Vgs (Max):: -

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

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DFN2020MD-6

BUK4D72-30X FAQ

1.How can I place an order for BUK4D72-30X through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK4D72-30X 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 BUK4D72-30X reliable?

The price and inventory of BUK4D72-30X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK4D72-30X is usually 5 days.

3.What payment methods are accepted for BUK4D72-30X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK4D72-30X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK4D72-30X?

BUK4D72-30X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK4D72-30X 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 BUK4D72-30X?

For technical support, including BUK4D72-30X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK4D72-30X requirements.

6.How does Aetrix verify that BUK4D72-30X is sourced from the original manufacturer or authorized distributors?

All BUK4D72-30X 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 BUK4D72-30X meets industry standards.

7.What is the process for return or replacement of BUK4D72-30X?

All BUK4D72-30X units undergo pre-shipment inspection (PSI). If there is an issue with BUK4D72-30X, 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 BUK4D72-30X part is unused and in its original packaging.

Return procedure for BUK4D72-30X:

1.Submit a request within 90 days.

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

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