Nexperia USA Inc. PMEG4005EH/6X

Overview

PMEG4005EH from Nexperia is a 40 V, 0.5 A planar Schottky barrier rectifier in SOD123F package, featuring 420–470 mV forward voltage at 500 mA and integrated guard ring for stress protection. It serves as a low-loss anode-cathode switching element in DC/DC converters, reverse polarity protection circuits, and low-voltage rectification paths where thermal efficiency and compact size are critical.

For engineers reviewing the PMEG4005EH datasheet, PMEG4005EH pinout, PMEG4005EH application, or PMEG4005EH equivalent, key selection criteria include its ultra-low VF at rated current, 150 °C junction temperature rating, SOD123F footprint compatibility, and verified performance under pulsed forward conditions per IEC 60134 limiting values.

Technical Context

This MEGA Schottky diode uses a planar silicon structure with an integrated guard ring to suppress edge breakdown and improve reliability under transient stress. Its low VF stems from optimized metal-semiconductor interface and thin epitaxial layer design, enabling high conduction efficiency without compromising reverse leakage.

Thermal behavior is defined by two distinct R_th values: 330 K/W (junction-to-ambient, standard FR4) and 60 K/W (junction-to-solder point), indicating strong thermal coupling to PCB copper when cathode pad is enlarged. Reverse leakage remains below 100 µA at 40 V and 25 °C, supporting stable operation in low-power bias networks.

Key Specifications

Pinout & Package

The PMEG4005EH is housed in a surface-mount SOD123F plastic package measuring 2.6 mm × 1.6 mm × 1.1 mm, with flat leads optimized for reflow soldering on standard FR4 PCBs. The cathode is marked by a visible bar on the device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSS40050MUTBG and VS-40CPH05-M3/45, the PMEG4005EH delivers the lowest VF in its class within the smallest SMD envelope, making it optimal for thermally sensitive, high-density power management where every millivolt and square millimeter matters.

Availability

PMEG4005EH is available at Aetrix Electronics and suitable for USB power protection, point-of-load DC/DC conversion, and industrial sensor node power path applications requiring stable component supply and consistent parametric performance across production batches.

Supply support for PMEG4005EH 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 and industrial-grade components.

The MEGA Schottky series targets high-efficiency power conversion in consumer, computing, and industrial systems, emphasizing low VF, robust surge tolerance, and manufacturability in automated SMT lines.

FAQ

What is the maximum allowable soldering temperature for PMEG4005EH?

The PMEG4005EH is qualified for standard lead-free reflow profiles per J-STD-020. Peak temperature must not exceed 260 °C for ≤30 seconds, with ramp rates limited to 3 °C/s max. The SOD123F package has been validated for IPC-A-610 Class 2 and Class 3 assembly standards.

Does PMEG4005EH require derating above 55 °C ambient?

Yes - the 0.5 A continuous forward current rating applies only when solder point temperature (T_sp) is ≤55 °C. Above this, current must be linearly derated to zero at 150 °C junction temperature, based on measured R_th(j-sp) = 60 K/W and typical PCB copper area.

Can PMEG4005EH replace a standard PN-junction diode in reverse polarity protection?

Yes - its 40 V reverse rating and <100 µA leakage at 40 V make it suitable for 5 V–24 V systems. Compared to PN diodes (VF ≈ 700 mV), it reduces voltage drop by >250 mV, improving efficiency and reducing heat generation in always-on protection paths.

Is PMEG4005EH automotive-qualified?

No - per Nexperia's revision history (v.3, Oct 2022), this part is explicitly designated as non-automotive. For automotive applications, use the -Q qualified variant PMEG4005EH-Q, which undergoes AEC-Q101 stress testing and includes extended temperature validation.