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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Nexperia USA Inc. PMEG40T20EPX

Name: PMEG40T20EPX
Brand: Nexperia USA Inc.
SKU: PMEG40T20EPX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMEG40T20EPX

Manufacturer:: Nexperia USA Inc.

Category:: Single Diodes

Package:: SOD-128

Datasheet:: PMEG40T20EPX.pdf

Description:: DIODE SCHOTTKY 40V 2A SOD128

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Inventory:450

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Product details

Overview

PMEG40T20EPX from Nexperia is a 40 V, 2 A Trench MEGA Schottky barrier rectifier in CFP5 (SOD128) package, designed for low-voltage DC-to-DC conversion and freewheeling paths where low forward voltage (445–515 mV at 2 A, 25 °C) and low reverse leakage (6–22 µA at 40 V, 25 °C) are critical. It employs clip-bonding for high power capability and supports reflow/wave soldering.

For engineers reviewing the PMEG40T20EPX datasheet, PMEG40T20EPX pinout, PMEG40T20EPX application, or PMEG40T20EPX equivalent, this device is selected for high-efficiency power stages requiring fast recovery (<12 ns), low thermal resistance (12 K/W junction-to-solder-point), and stable operation up to 175 °C junction temperature in compact SMD layouts.

Technical Context

This Schottky rectifier uses Trench MEGA technology to achieve low VF and low IR simultaneously-enabling higher efficiency in low-voltage, high-current switching paths. Its clip-bonded construction reduces thermal resistance and improves current handling beyond standard wire-bonded diodes.

The CFP5 package features a flat lead design with exposed cathode tab for direct thermal coupling to PCB copper, supporting both standard footprint (R_th(j-a) = 200 K/W) and enhanced pad layout (R_th(j-sp) = 12 K/W). It exhibits step-recovery behavior with t_rr = 11.5 ns and negligible minority-carrier storage.

Key Specifications

Parameter	Value and Actual Design Meaning
Reverse Voltage (V_R)	40 V - Maximum blocking capability in reverse bias without breakdown; suitable for 24 V system rails with margin.
Average Forward Current (I_F(AV))	2 A - Continuous DC or pulsed average current at T_sp ≤ 165 °C; enables compact 2 A power stage designs.
Forward Voltage (V_F)	445–515 mV @ 2 A, 25 °C - Low conduction loss reduces heat generation and improves efficiency in buck/flyback outputs.
Reverse Leakage (I_R)	6–22 µA @ 40 V, 25 °C - Minimal standby loss in reverse polarity protection and hold-up circuits.
Reverse Recovery Time (t_rr)	11.5 ns - Step-recovery behavior eliminates tail current, reducing switching loss and EMI in high-frequency SMPS.
Junction-to-Solder-Point R_th	12 K/W - Enables efficient heat transfer from die to PCB via cathode tab, supporting >1 W continuous dissipation with proper layout.
Peak Forward Surge (I_FSM)	20 A @ 8 ms - Withstands short-term inrush or fault currents without degradation in motor drive or hot-swap applications.

Pinout & Package

Encapsulated in CFP5 (SOD128): 3.8 mm × 2.6 mm × 1.0 mm body, flat lead surface-mount package with exposed cathode tab for thermal and electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Main current exit path; electrically and thermally connected to large exposed metal tab for low-inductance, low-resistance PCB mounting.
2	Anode (A)	Current entry point; small planar terminal optimized for minimal parasitic inductance in high-dI/dt paths.

Key Features

Feature	Design Value
Trench MEGA Schottky architecture	Simultaneously achieves low V_F and low I_R - critical for efficiency-sensitive 5–24 V DC/DC converters.
Clip-bonded interconnect	Reduces bond wire resistance and thermal impedance, enabling 2.8 A peak forward current and robust surge handling.
CFP5 (SOD128) package	Flat, low-profile SMD outline with exposed cathode - simplifies thermal management without heatsinks in space-constrained layouts.
Reflow- and wave-solder compatible	Qualified per J-STD-020 and JEDEC Level 2a - supports high-volume manufacturing without special process adjustments.
175 °C maximum junction temperature	Enables reliable operation in sealed enclosures or high-ambient industrial environments without derating penalties.

Applications

DC-DC Buck Converter Output Rectification

Reverse Polarity Protection

Use Scenario: Secondary-side rectification in 5 V/12 V synchronous or asynchronous buck regulators powering FPGAs, microcontrollers, or sensors.

IC Role / Device Role / Timing Role: Unidirectional current path with minimal conduction loss and zero reverse recovery delay.

Use Value: 445 mV V_F at 2 A cuts conduction loss by ~40% vs. standard Schottkys, directly improving full-load efficiency.

Use Scenario: Input-stage protection for USB-C PD adapters, PoE-powered devices, and battery-backed systems.

IC Role / Device Role / Timing Role: Series-blocking element that conducts only during correct polarity insertion.

Use Value: 6 µA max I_R at 40 V ensures <1 µW standby loss, preserving battery life in always-on applications.

Freewheeling Diode in Motor Drivers

Low-Power Consumption Standby Supply

Use Scenario: Flyback path for brushed DC or stepper motor H-bridge drivers operating at 20–100 kHz PWM.

IC Role / Device Role / Timing Role: Fast-recovery freewheeling path that clamps inductive kick without oscillation.

Use Value: 11.5 ns t_rr prevents reverse conduction overlap, eliminating shoot-through risk and reducing MOSFET stress.

Use Scenario: Auxiliary 3.3 V rail generation from main 12 V supply in IoT gateways and smart meters.

IC Role / Device Role / Timing Role: Low-loss rectifier feeding linear regulator or LDO input in ultra-low-quiescent systems.

Use Value: 310 mV V_F at 0.1 A minimizes dropout across the diode, extending usable input voltage range down to 3.6 V.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSR20F40NXT5G	Same 40 V/2 A rating; VF = 490 mV typ @ 2 A but higher IR = 15 µA @ 40 V; SOD-123FL package.	SOD-123FL has no exposed thermal tab - limits power dissipation to ~0.75 W vs. 1.2 W for PMEG40T20EPX.	Select when board space is tighter than thermal budget, and peak power is <0.8 W.
Vishay VS-2EDH04-M3/86A	Higher 45 V rating; VF = 520 mV @ 2 A; TO-277 package with isolated cathode tab.	TO-277 requires larger footprint and different thermal pad layout; better suited for >3 A average current.	Select when 5 V margin above 40 V is required and PCB layout allows 6.2 mm × 4.2 mm footprint.

Compared with NSR20F40NXT5G and VS-2EDH04-M3/86A, PMEG40T20EPX delivers the lowest thermal resistance (12 K/W) and best VF/IR trade-off in the smallest footprint, making it optimal for thermally dense, efficiency-critical 2 A power rails.

Availability

PMEG40T20EPX is available at Aetrix Electronics and suitable for DC-DC buck converters, reverse polarity protection circuits, freewheeling paths in motor drivers, and low-power standby supplies requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for PMEG40T20EPX 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 efficiency technologies - delivering high-performance, high-reliability discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PMEG40T20EPX belongs to Nexperia's Trench MEGA Schottky rectifier product line, engineered specifically for high-efficiency, low-voltage power conversion where minimal forward drop and fast switching are mandatory.

FAQ

What is the maximum allowable solder point temperature for PMEG40T20EPX during reflow?

The device is qualified for standard lead-free reflow per J-STD-020, with peak solder point temperature up to 260 °C for ≤30 seconds. The datasheet specifies T_sp ≤ 165 °C for continuous 2 A operation, but transient reflow exposure follows JEDEC profiles - no internal damage occurs below 260 °C peak, provided time-above-liquidus is within specification limits.

Can PMEG40T20EPX replace a standard silicon PN diode in a 24 V flyback snubber?

Yes - its 40 V V_R, 11.5 ns t_rr, and absence of reverse recovery charge make it superior to PN diodes in snubbers. However, verify that reverse leakage (6–22 µA) does not interfere with snubber timing constants; in most 24 V flyback designs with RC snubbers, this leakage is negligible compared to typical resistor values (≥10 kΩ).

Is the cathode tab electrically isolated from the PCB copper pour?

No - the cathode tab is the primary terminal (Pin 1) and must be soldered directly to a dedicated PCB copper area. It is not insulated; connecting it to ground or output rail is required for circuit function and thermal performance. Isolation would defeat both electrical and thermal design intent.

Does PMEG40T20EPX have automotive qualification?

No - the datasheet revision v.2 (2023) explicitly states this part was changed to non-automotive qualification. It is not AEC-Q101 qualified, and Nexperia directs users to its automotive-Q alternatives for vehicle applications. Use only in industrial, consumer, or computing equipment where automotive-grade reliability is not mandated.

PMEG40T20EPX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 445 mV @ 2 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 11.5 ns

Current - Reverse Leakage @ Vr:: 22 µA @ 40 V

Capacitance @ Vr, F:: 355pF @ 1V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128/CFP5

Operating Temperature - Junction:: 175°C (Max)

PMEG40T20EPX FAQ

1.How can I place an order for PMEG40T20EPX through Aetrix?

Please submit a Request for Quotation (RFQ) for PMEG40T20EPX 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 PMEG40T20EPX reliable?

The price and inventory of PMEG40T20EPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMEG40T20EPX is usually 5 days.

3.What payment methods are accepted for PMEG40T20EPX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMEG40T20EPX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMEG40T20EPX?

PMEG40T20EPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMEG40T20EPX 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 PMEG40T20EPX?

For technical support, including PMEG40T20EPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMEG40T20EPX requirements.

6.How does Aetrix verify that PMEG40T20EPX is sourced from the original manufacturer or authorized distributors?

All PMEG40T20EPX 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 PMEG40T20EPX meets industry standards.

7.What is the process for return or replacement of PMEG40T20EPX?

All PMEG40T20EPX units undergo pre-shipment inspection (PSI). If there is an issue with PMEG40T20EPX, 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 PMEG40T20EPX part is unused and in its original packaging.

Return procedure for PMEG40T20EPX:

1.Submit a request within 90 days.

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

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