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Nexperia USA Inc. PMEG40T50EPX
- Part No.:
- PMEG40T50EPX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
PMEG40T50EPX.pdf
- Description:
- DIODE SCHOTTKY 40V 5A SOD128
- Quantity:
- Payment:
- Shipping:
Inventory:5,877
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Product details
Overview
PMEG40T50EPX from Nexperia is a 40 V, 5 A Trench MEGA Schottky barrier rectifier in CFP5 (SOD128) package, designed for low-voltage, high-efficiency DC-to-DC conversion and freewheeling paths. It delivers 470 mV typical forward voltage at 5 A and 25 °C, 12 µA max reverse leakage at 40 V/25 °C, and operates up to 175 °C junction temperature - enabling compact, thermally efficient power stages in space-constrained industrial and consumer SMPS.
For engineers reviewing the PMEG40T50EPX datasheet, PMEG40T50EPX pinout, PMEG40T50EPX application, or PMEG40T50EPX equivalent, key selection criteria include its ultra-low VF for reduced conduction loss, clip-bonded thermal performance (Rth(j-sp) = 12 K/W), SOD128 footprint compatibility, and verified suitability for reverse polarity protection and low-power consumption systems.
Technical Context
This Schottky rectifier uses Trench MEGA technology to suppress leakage current while maintaining low forward voltage - critical for efficiency in 5–24 V input DC-DC converters. Its clip-bonded construction enhances thermal transfer from die to cathode tab, supporting 7 A continuous forward current under optimized PCB layout (1 cm² cathode pad).
The device exhibits step-recovery behavior with trr = 24 ns and negligible minority-carrier storage, eliminating snubber requirements in high-frequency switching topologies. Diode capacitance drops from 820 pF at 1 V to 350 pF at 10 V reverse bias, minimizing switching loss and EMI in synchronous buck and flyback freewheeling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VF @ 5 A | 470–525 mV at 25 °C: enables >95% efficiency in 12 V → 5 V buck converters at full load |
| IR @ 40 V | 12–41 µA at 25 °C: ensures minimal standby power loss in always-on systems |
| Tj max | 175 °C: supports operation in sealed enclosures or high-ambient industrial environments |
| Rth(j-sp) | 12 K/W: allows 1.1 W total power dissipation with only 1 cm² copper pad on FR4 |
| trr | 24 ns (step recovery): eliminates reverse recovery spikes in 500 kHz+ switching circuits |
| Cd @ 10 V | 350 pF: reduces capacitive turn-on loss and gate drive burden in synchronous rectification |
| IF(AV) | 5 A at δ = 0.5 / 20 kHz: rated for continuous duty in PWM-driven freewheeling paths |
Pinout & Package
Encapsulated in CFP5 (SOD128) - a 3.8 mm × 2.6 mm × 1.0 mm surface-mount plastic package with flat leads and 4.0 mm pitch, optimized for automated reflow assembly and thermal relief via cathode tab soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Main current exit path; electrically and thermally connected to large exposed copper tab for low-inductance, high-current return and heat sinking |
| 2 (A) | Anode | Current entry point; smaller lead optimized for signal routing and minimal parasitic inductance in high-dI/dt paths |
Key Features
| Feature | Design Value |
|---|---|
| Trench MEGA Schottky architecture | Reduces reverse leakage by >50% vs. planar Schottky at same VF, improving no-load efficiency |
| Clip-bonded die attachment | Lowers Rth(j-sp) to 12 K/W - enables 1.1 W dissipation without heatsink on standard FR4 |
| SOD128 footprint | Industry-standard 3.8 × 2.6 mm outline with 4 mm pitch - drop-in compatible with existing layouts and pick-and-place tooling |
| Low VF temperature stability | VF = 400 mV at 5 A / 125 °C: maintains efficiency across automotive-grade ambient ranges |
| Step-recovery trr | 24 ns with 0.1 A measurement threshold: eliminates tail current, simplifying EMI filter design |
Applications
| DC-DC Buck Converter Freewheeling | Reverse Polarity Protection |
|---|---|
|
Use Scenario: High-frequency (500 kHz–2 MHz) synchronous buck converter stepping 12 V down to 3.3 V for FPGA I/O rails. IC Role / Device Role / Timing Role: Freewheeling diode replacing MOSFET body diode during low-side switch off-time; conducts reverse inductive current. Use Value: 470 mV VF cuts conduction loss by ~40% vs. standard Schottky, reducing thermal stress on adjacent ICs and enabling smaller output capacitors. |
Use Scenario: Input protection circuit for USB-C powered peripherals accepting 5–20 V supply with plug-reversal risk. IC Role / Device Role / Timing Role: Series anode-cathode blocking diode placed before main regulator; conducts only during correct polarity insertion. Use Value: 12 µA IR at 40 V ensures <1 µW standby loss - critical for battery-backed devices with multi-year shelf life. |
| Low-Voltage Rectification | High-Efficiency SMPS Auxiliary Supply |
|
Use Scenario: 5 V AC adapter output rectification feeding a linear post-regulator for analog sensor subsystems. IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to DC; handles full load current with minimal ripple. Use Value: 525 mV max VF at 5 A limits voltage droop to <260 mV, preserving regulation margin for ±1% LDOs downstream. |
Use Scenario: Auxiliary 12 V → 3.3 V flyback supply powering microcontroller and communication ICs in industrial PLC modules. IC Role / Device Role / Timing Role: Secondary-side rectifier in discontinuous conduction mode (DCM) flyback; recovers energy during transformer reset. Use Value: 24 ns trr prevents cross-conduction with primary switch, eliminating need for timing dead-time adjustment in controller IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-50SQ040 | 40 V, 5 A; VF = 550 mV @ 5 A; TO-277 package (larger, higher Rth(j-a)) | Requires larger PCB area and thermal relief; less suitable for ultra-thin designs | Select when legacy TO-277 footprint compatibility or higher surge rating (IFSM = 120 A) is required |
| ON Semiconductor NSR50P40 | 40 V, 5 A; VF = 490 mV @ 5 A; same SOD128 package but higher IR (35 µA @ 40 V) | Higher leakage increases standby loss in battery-powered applications | Select when tighter VF tolerance is prioritized over leakage, and thermal budget permits 15 K/W Rth(j-sp) |
Compared with VS-50SQ040 and NSR50P40, PMEG40T50EPX offers the lowest combined VF-leakage trade-off in SOD128, best-in-class thermal resistance, and verified performance in high-frequency freewheeling - making it optimal for space- and efficiency-critical 5–24 V power rails.
Availability
PMEG40T50EPX is available at Aetrix Electronics and suitable for industrial SMPS, USB-C power delivery accessories, and embedded system auxiliary supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for PMEG40T50EPX 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, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
PMEG40T50EPX belongs to Nexperia's Trench MEGA Schottky rectifier product line, engineered specifically for high-efficiency, low-voltage DC-DC conversion where minimal forward voltage and thermal resistance are critical system-level constraints.
FAQ
Is PMEG40T50EPX qualified for automotive applications?
No. Per Nexperia's revision history (v.2, April 2023), PMEG40T50EPX is explicitly designated as non-automotive. It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation beyond 175 °C junction. For automotive use, select the -Q qualified variant (e.g., PMEG40T50EPX-Q).
What is the maximum recommended solder pad size for the cathode tab?
The datasheet specifies a 1 cm² tin-plated copper pad for optimal thermal performance (Rth(j-sp) = 12 K/W). Pad dimensions should match the cathode tab outline in Figure 16 (4.4 mm × 2.1 mm minimum), with thermal vias recommended if board layer count permits - but not required for rated 5 A operation under specified conditions.
Does PMEG40T50EPX exhibit soft recovery behavior?
No. As a Schottky diode, it has no minority-carrier storage and therefore no reverse recovery charge (Qrr). Its "reverse recovery time" (trr = 24 ns) is defined as step-recovery transition time per Figure 11 - a capacitive charging effect, not carrier sweep-out. This results in inherently soft, low-EMI switching with no voltage overshoot.
Can PMEG40T50EPX replace a standard 1N5822 in existing designs?
Yes, with caveats: both are 40 V/3 A Schottkys, but PMEG40T50EPX offers 5 A average current, lower VF (470 mV vs. ~550 mV), and SOD128 vs. DO-201AD. Pin-compatible replacement requires footprint adaptation and verification of thermal margin - especially since PMEG40T50EPX supports higher current density in the same area.
PMEG40T50EPX 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):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 525 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 24 ns
- Current - Reverse Leakage @ Vr:
- 41 µA @ 40 V
- Capacitance @ Vr, F:
- 820pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128/CFP5
- Operating Temperature - Junction:
- 175°C (Max)
PMEG40T50EPX FAQ
1.How can I place an order for PMEG40T50EPX through Aetrix?
Please submit a Request for Quotation (RFQ) for PMEG40T50EPX 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 PMEG40T50EPX reliable?
The price and inventory of PMEG40T50EPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMEG40T50EPX is usually 5 days.
3.What payment methods are accepted for PMEG40T50EPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMEG40T50EPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PMEG40T50EPX?
PMEG40T50EPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PMEG40T50EPX 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 PMEG40T50EPX?
For technical support, including PMEG40T50EPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMEG40T50EPX requirements.
6.How does Aetrix verify that PMEG40T50EPX is sourced from the original manufacturer or authorized distributors?
All PMEG40T50EPX 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 PMEG40T50EPX meets industry standards.
7.What is the process for return or replacement of PMEG40T50EPX?
All PMEG40T50EPX units undergo pre-shipment inspection (PSI). If there is an issue with PMEG40T50EPX, 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 PMEG40T50EPX part is unused and in its original packaging.
Return procedure for PMEG40T50EPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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