Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. BUK4D38-20PH

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

Compare

Part No.:: BUK4D38-20PH

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: 6-UDFN Exposed Pad

Datasheet:: BUK4D38-20PH.pdf

Description:: SMALL SIGNAL MOSFETS FOR AUTOMOT

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,758

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BUK4D38-20PH 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 BUK4D38-20PH datasheet, BUK4D38-20PH pinout, BUK4D38-20PH application, or BUK4D38-20PH equivalent, this device is selected for its AEC-Q101 qualification, side-wettable flanks for automated optical inspection, 175 °C junction rating, and low R_DS(on) enabling high-efficiency switching in space-constrained automotive and industrial modules.

Technical Context

This MOSFET uses Trench MOSFET technology to achieve low on-resistance and fast switching with gate charge Q_G(tot) of 10.6–16 nC and turn-off delay t_d(off) of 23 ns under standard test conditions. Its gate threshold voltage V_GS(th) ranges from −0.6 V to −1.3 V, ensuring reliable turn-on with logic-level gate drive down to −2.5 V.

The device integrates an intrinsic source-drain diode with V_SD = −0.8 to −1.2 V at I_S = −2 A and exhibits avalanche ruggedness of 15 mJ (unclamped), supporting robust operation in inductive load switching. Thermal resistance R_th(j-sp) is 4–8 K/W, optimized for solder-point thermal coupling on FR4 PCBs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	−20 V - Maximum drain-source blocking voltage; defines safe operating range in high-side switch configurations.
R_DS(on)	30–38 mΩ @ V_GS = −4.5 V, I_D = −6 A, T_j = 25 °C - Enables <1.4 W conduction loss at 6 A, critical for thermally constrained layouts.
I_D (cont)	−18 A @ T_sp = 25 °C - Supports high-current load switching without external heatsinking on standard PCB mounting.
Q_G(tot)	10.6–16 nC - Low gate charge reduces driver power demand and enables >1 MHz PWM operation with minimal switching loss.
T_j max	175 °C - Extended junction temperature rating ensures reliability in under-hood automotive environments.
AEC-Q101	Qualified - Meets stress-test requirements for discrete semiconductors in automotive applications per AEC standard.
R_th(j-sp)	4–8 K/W - Low junction-to-solder-point thermal resistance enables direct thermal path to PCB copper, improving power handling.

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 automated optical solder inspection. The exposed drain terminals provide low-inductance, high-current paths and efficient heat transfer to the PCB.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 5, 6, 7	Drain (D)	Five parallel drain terminals reduce current density and package inductance; connected internally to the exposed thermal pad.
3	Gate (G)	Single gate input with 21 Ω typical gate resistance; compatible with standard logic-level drivers (−2.5 V to −12 V).
4, 8	Source (S)	Two dedicated source terminals provide low-impedance return path and improve current sharing in high-frequency switching.

Key Features

Feature	Design Value
Side-wettable flanks	Enables 100% automated optical inspection (AOI) of solder joints without X-ray, reducing manufacturing defect escape.
AEC-Q101 qualification	Validated for automotive use including temperature cycling, HTRB, and ESD testing - eliminates requalification effort for Tier 1 designs.
Trench MOSFET architecture	Delivers 30% lower R_DS(on) vs planar P-channel equivalents at same voltage rating, improving system efficiency in 12 V rail switching.
ESD protection	HBM Class H1C (>1 kV) - protects against handling damage during SMT assembly and board-level integration.
Extended T_j range	Rated for continuous operation up to 175 °C - supports placement near heat sources (e.g., power inductors, MCUs) without derating.

Applications

Automotive Body Control Module (BCM)

Industrial DC-DC Converter

Use Scenario: High-side power distribution for LED lighting, window lift motors, and door lock actuators in 12 V vehicle electrical systems.

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

Use Value: Eliminates need for external charge pump or N-channel + driver IC; simplifies layout while meeting ISO 7637-2 pulse immunity via low R_DS(on) and avalanche energy rating.

Use Scenario: Synchronous rectification in isolated 24 V to 5 V/3.3 V buck converters for PLC I/O modules and sensor transmitters.

IC Role / Device Role / Timing Role: Low-loss freewheeling switch replacing Schottky diodes to improve converter efficiency above 85% at full load.

Use Value: Reduces conduction loss by >60% vs 40 V Schottky, enabling smaller heatsinks and higher power density in DIN-rail mounted enclosures.

High-Speed Line Driver

USB-C Power Delivery Switch

Use Scenario: Bidirectional signal line termination and level translation in CAN FD and LIN bus interfaces with hot-swap capability.

IC Role / Device Role / Timing Role: Fast-turning P-channel switch isolating bus segments during fault conditions or firmware updates.

Use Value: 19 ns fall time and 23 ns turn-off delay support >5 Mbps data rates; ESD-hardened inputs prevent latch-up during cable insertion.

Use Scenario: V_CONN and CC line power path control in USB-C receptacles for portable medical devices and test equipment.

IC Role / Device Role / Timing Role: AEC-Q101-qualified high-side switch managing 5 V/20 V auxiliary power routing with overcurrent detection interface.

Use Value: Side-wettable flanks ensure solder joint integrity in fine-pitch USB-C connectors; 175 °C rating accommodates enclosure thermal stacking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel high-side switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMT6009LPS-13	−60 V V_DS, 7.2 A I_D, 9.5 mΩ R_DS(on) - higher voltage rating but lower current and different package (SO-8).	Used in 48 V telecom power rails; not AEC-Q101 qualified; lacks side-wettable flanks.	Select when higher V_DS margin is required and automotive qualification is unnecessary.
IPD70P03P4L-11	−30 V V_DS, 70 A I_D, 3.1 mΩ R_DS(on) - TO-252 package, higher current, no SWF, non-automotive grade.	Targeted at industrial motor drives; requires external heatsink; incompatible with AOI-based assembly lines.	Choose for high-power, non-automotive applications where thermal mass outweighs footprint constraints.

Compared with DMT6009LPS-13 and IPD70P03P4L-11, BUK4D38-20PH uniquely combines AEC-Q101 qualification, side-wettable flanks, and optimized 20 V/18 A performance in a 2 mm × 2 mm footprint-making it the only drop-in solution for space-limited, production-ready automotive power switches requiring zero visual inspection risk.

Availability

BUK4D38-20PH is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, and high-speed line driver circuits requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for BUK4D38-20PH 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 - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

BUK4D38-20PH belongs to Nexperia's TrenchMOS automotive-qualified P-channel portfolio, engineered specifically for high-efficiency, high-density power switching in harsh-environment applications where AEC-Q101 compliance and thermal robustness are mandatory.

FAQ

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

At T_sp = 100 °C, the normalized continuous drain current is approximately 61% of the 25 °C rating, yielding −11 A (per Table 5). This derating is defined by the junction-to-solder-point thermal resistance and must be applied when ambient or board temperatures exceed 70 °C.

Does BUK4D38-20PH support gate drive from a 3.3 V microcontroller?

No - the gate threshold voltage V_GS(th) ranges from −0.6 V to −1.3 V, but full enhancement requires V_GS ≤ −4.5 V to achieve specified R_DS(on). A 3.3 V MCU cannot directly drive the gate; a level-shifting circuit or dedicated gate driver (e.g., TC4427) is required for logic-compatible operation.

How does the side-wettable flank design impact PCB assembly yield?

The side-wettable flanks enable 100% automated optical inspection (AOI) of all five drain solder joints without X-ray imaging. This eliminates manual visual inspection and reduces field failure rates linked to insufficient solder fillet formation - particularly critical for automotive safety-related modules.

Is the intrinsic body diode suitable for reverse polarity protection?

Yes - the source-drain diode has V_SD = −0.8 to −1.2 V at −2 A and reverse recovery time t_rr = 17 ns, making it effective for low-loss reverse polarity protection in 12 V systems. However, for high-current or high-dV/dt applications, an external Schottky may still be preferred to minimize forward voltage drop.

BUK4D38-20PH 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

BUK4D38-20PH FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your BUK4D38-20PH 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 BUK4D38-20PH?

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

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

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

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

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

Return procedure for BUK4D38-20PH:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…