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

Nexperia USA Inc. BUK4D38-20PZ

Name: BUK4D38-20PZ
Brand: Nexperia USA Inc.
SKU: BUK4D38-20PZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK4D38-20PZ

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: 6-UDFN Exposed Pad

Datasheet:: BUK4D38-20PZ.pdf

Description:: BUK4D38-20P/SOT1220/DFN2020MD-

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Product details

Overview

BUK4D38-20PZ from Nexperia is a P-channel enhancement-mode Trench MOSFET in DFN2020MD-6 (SOT1220) package, rated for −20 V V_DS, 18 A continuous drain current at T_sp = 25 °C, and 30–38 mΩ R_DS(on) at V_GS = −4.5 V and T_j = 25 °C. It serves as a high-side load switch or DC-DC synchronous rectifier in automotive-grade power management circuits.

For engineers reviewing the BUK4D38-20PZ datasheet, BUK4D38-20PZ pinout, BUK4D38-20PZ application, or BUK4D38-20PZ equivalent, key selection criteria include its AEC-Q101 qualification, side-wettable flanks for automated optical inspection, 175 °C maximum junction temperature, and low R_DS(on) enabling efficient high-current switching in space-constrained automotive modules.

Technical Context

This device uses Trench MOSFET technology to achieve low on-resistance and fast switching with minimal gate charge (Q_G(tot) = 10.6–16 nC). Its gate threshold voltage (V_GS(th)) ranges from −0.6 V to −1.3 V, enabling robust turn-on with standard logic-level drive down to −2.5 V.

The integrated source-drain diode exhibits V_SD = −0.8 to −1.2 V at I_S = −2 A and t_rr = 17 ns, supporting moderate-frequency freewheeling in buck converters. Thermal resistance from junction to solder point is 4–8 K/W, optimized for PCB-mounted thermal relief via the exposed drain pad.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	−20 V - Maximum blocking voltage for 12 V automotive rail protection and load switching
R_DS(on)	30–38 mΩ @ V_GS = −4.5 V, I_D = −6 A, T_j = 25 °C - Enables ≤0.22 W conduction loss at 6 A
I_D (cont)	−18 A @ T_sp = 25 °C - Supports high-current loads with appropriate PCB copper area
Q_G(tot)	10.6–16 nC - Low gate charge reduces driver power and enables >1 MHz switching in compact DC-DC stages
T_j(max)	175 °C - Qualified for under-hood automotive environments without derating below 150 °C ambient
ESD Rating	>1 kV HBM (Class H1C) - Robust handling during SMT assembly and board-level testing
AEC-Q101	Qualified - Meets stress test requirements for discrete semiconductors in automotive applications

Pinout & Package

DFN2020MD-6 (SOT1220) is a 2 mm × 2 mm × 0.65 mm leadless thermal-enhanced ultra-thin package with side-wettable flanks for AOI-compatible solder joint verification. The exposed drain terminals provide low thermal resistance to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 5, 6, 7	Drain (D)	Five parallel drain terminals connected to internal die drain metallization and exposed thermal pad - primary current path and thermal conduction path to PCB
3	Gate (G)	Single control terminal requiring ≤12 V negative bias relative to source; gate capacitance supports fast edge rates with low-impedance drivers
4, 8	Source (S)	Two dedicated source terminals - carry full load current and serve as reference for gate drive; tied to system ground or low-side return path

Key Features

Feature	Design Value
Side-wettable flanks	Enables automated optical inspection (AOI) of solder fillets without X-ray, reducing post-SMT defect escape in automotive production
Extended T_j range	Rated operation up to 175 °C junction temperature - eliminates need for external thermal derating in engine control units and ADAS modules
Trench MOSFET architecture	Delivers 30–38 mΩ R_DS(on) at −4.5 V gate drive - allows direct interface with 3.3 V/5 V microcontrollers without level-shifting
AEC-Q101 qualification	Validated per Automotive Electronics Council stress test standard - ensures reliability in vibration, temperature cycling, and humidity exposure
Low Q_GD/Q_GS ratio	Q_GD = 3.6 nC, Q_GS = 2.1 nC - improves hard-switching immunity and reduces Miller-induced shoot-through risk in half-bridge configurations

Applications

Automotive Body Control Module (BCM)

Industrial DC-DC Converter

Use Scenario: High-side power distribution for LED headlamps and window lift motors in 12 V vehicle architectures.

IC Role / Device Role / Timing Role: P-channel high-side load switch controlling power delivery with reverse-polarity and overcurrent protection.

Use Value: 175 °C rating enables placement near heat-generating ECUs; side-wettable flanks ensure solder joint integrity in high-vibration chassis environments.

Use Scenario: Synchronous rectification in isolated 24 V to 5 V buck converters for industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Low-R_DS(on) P-channel MOSFET replacing Schottky diodes to improve efficiency at 5–10 A output currents.

Use Value: 30–38 mΩ R_DS(on) cuts conduction losses by >60% vs. 40 V Schottky, raising converter efficiency from 89% to 93% at full load.

USB-C Power Delivery Sink

Smart Home Energy Monitor

Use Scenario: Input reverse-polarity protection and inrush limiting for USB-C PD sink controllers accepting up to 20 V input.

IC Role / Device Role / Timing Role: P-channel MOSFET configured as ideal diode with gate driven by dedicated controller IC.

Use Value: −20 V V_DS rating accommodates USB-C PD's 20 V max; 1 kV HBM ESD rating prevents latch-up during hot-plug events.

Use Scenario: High-side switching of AC/DC power supplies feeding smart meter communication subsystems.

IC Role / Device Role / Timing Role: Load switch isolating auxiliary rails during firmware updates or fault conditions.

Use Value: AEC-Q101 qualification provides long-term reliability assurance for 10+ year field deployments; DFN2020MD-6 footprint saves >40% board area vs. SO-8 alternatives.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMG2305UVT-7	R_DS(on) = 42–52 mΩ @ −4.5 V; smaller 2 mm × 2 mm × 0.55 mm package; no AEC-Q101 qualification	Targeted at consumer portables, not automotive; lacks side-wettable flanks and extended temperature validation	Select only for cost-sensitive non-automotive designs where 175 °C operation and AOI capability are unnecessary
IPB80P03P4L-04	R_DS(on) = 2.8 mΩ @ −10 V; TO-263 package; higher gate charge (Q_G = 100 nC); requires −10 V drive for optimal R_DS(on)	Designed for high-power motor drives; incompatible pinout and thermal interface; unsuitable for DFN-restricted layouts	Choose only when ≥50 A current and <5 mΩ R_DS(on) are mandatory - not a drop-in replacement due to package and drive requirements

Compared with DMG2305UVT-7, BUK4D38-20PZ delivers lower R_DS(on), AEC-Q101 compliance, and AOI-ready packaging; versus IPB80P03P4L-04, it trades absolute on-resistance for compact size, lower gate drive voltage, and automotive process validation - making it optimal for space-constrained 12–20 V high-side switches.

Availability

BUK4D38-20PZ is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, and USB-C power delivery systems requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for BUK4D38-20PZ 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 essential semiconductors for automotive, industrial, mobile, and computing markets.

BUK4D38-20PZ belongs to Nexperia's TrenchMOS automotive-qualified P-channel portfolio, engineered specifically for high-efficiency, high-temperature load switching in space-constrained automotive electronics.

FAQ

What is the maximum continuous drain current for BUK4D38-20PZ at 100 °C solder point temperature?

At T_sp = 100 °C, the continuous drain current is −11 A, as specified in Table 5 (Limiting values). This reflects thermal derating due to reduced power dissipation capability at elevated board temperatures, with P_tot dropping to approximately 7.5 W based on normalized curves in Figure 2.

Does BUK4D38-20PZ require a gate resistor for safe switching in a 1 MHz DC-DC application?

Yes - a series gate resistor (typically 2–10 Ω) is recommended to dampen ringing caused by gate-drain capacitance (C_rss = 113 pF) and parasitic inductance. Without it, fast edges may induce oscillation or exceed dV/dt limits, especially given its low Q_GD/Q_GS ratio and 6 Ω typical gate resistance.

Can BUK4D38-20PZ be used in a synchronous buck converter as the high-side switch?

No - it is a P-channel device intended for high-side switching but lacks integrated bootstrap circuitry or gate drive compatibility for synchronous rectification in buck topologies. It functions as a controlled high-side switch or ideal diode, not as a self-timed synchronous FET in a two-MOSFET buck stage.

How does the side-wettable flank design impact reflow soldering profile requirements?

The side-wettable flanks do not alter reflow profile requirements - standard lead-free (J-STD-020) profiles apply. However, the 0.65 mm pitch and exposed drain pad demand precise stencil aperture design (0.35 mm × 0.76 mm lands per pin) and controlled paste volume to ensure consistent fillet formation for AOI detection, as shown in Figure 19.

BUK4D38-20PZ Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 6-UDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 20 V

Current - Continuous Drain (Id) @ 25°C:: 6A (Ta), 18A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 2.5V, 8V

Rds On (Max) @ Id, Vgs:: 33mOhm @ 6A, 8V

Vgs(th) (Max) @ Id:: 1.3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 16 nC @ 4.5 V

Vgs (Max):: ±12V

Input Capacitance (Ciss) (Max) @ Vds:: 1025 pF @ 10 V

FET Feature:: -

Power Dissipation (Max):: 2W (Ta), 19W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DFN2020MD-6

BUK4D38-20PZ FAQ

1.How can I place an order for BUK4D38-20PZ through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK4D38-20PZ 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 BUK4D38-20PZ reliable?

The price and inventory of BUK4D38-20PZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK4D38-20PZ is usually 5 days.

3.What payment methods are accepted for BUK4D38-20PZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK4D38-20PZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK4D38-20PZ?

BUK4D38-20PZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK4D38-20PZ 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 BUK4D38-20PZ?

For technical support, including BUK4D38-20PZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK4D38-20PZ requirements.

6.How does Aetrix verify that BUK4D38-20PZ is sourced from the original manufacturer or authorized distributors?

All BUK4D38-20PZ 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 BUK4D38-20PZ meets industry standards.

7.What is the process for return or replacement of BUK4D38-20PZ?

All BUK4D38-20PZ units undergo pre-shipment inspection (PSI). If there is an issue with BUK4D38-20PZ, 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 BUK4D38-20PZ part is unused and in its original packaging.

Return procedure for BUK4D38-20PZ:

1.Submit a request within 90 days.

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

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