Nexperia USA Inc. PMEG4005EGW-QJ

Overview

PMEG4005EGW-QJ from Nexperia is a 40 V, 0.5 A automotive-qualified Schottky barrier rectifier in SOD123 package, featuring low forward voltage (420 mV typ. at 500 mA), low reverse leakage (30 µA typ. at 40 V), and integrated guard ring for stress protection. It serves as a high-efficiency output rectifier in DC-DC converters and reverse polarity protection diode in 12 V automotive subsystems.

For engineers reviewing the PMEG4005EGW-QJ datasheet, PMEG4005EGW-QJ pinout, PMEG4005EGW-QJ application, or PMEG4005EGW-QJ equivalent, key selection criteria include forward voltage drop under pulsed 500 mA load, thermal resistance to solder point (190 K/W), AEC-Q101 qualification status, and SOD123 footprint compatibility with space-constrained PCB layouts.

Technical Context

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

Thermal performance is defined by two critical paths: junction-to-solder-point (190 K/W) for board-level thermal management, and junction-to-ambient (310 K/W in free air). The device operates up to 150 °C junction temperature and supports repetitive peak forward current up to 7 A (tp ≤ 1 ms).

Key Specifications

Pinout & Package

Encapsulated in SOD123 surface-mount plastic package (2.675 mm × 1.6 mm × 1.15 mm body), with cathode marked by a bar on the top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB050M-30 and SS34-HF, PMEG4005EGW-QJ delivers the lowest VF in SOD123 while maintaining AEC-Q101 compliance-making it optimal for thermally dense, automotive-grade 0.5 A rectification where footprint and qualification are non-negotiable.

Availability

PMEG4005EGW-QJ is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power adapters, and industrial IoT sensor nodes requiring stable component supply across extended production lifecycles.

Supply support for PMEG4005EGW-QJ 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 components and advanced packaging.

This device belongs to Nexperia's MEGA Schottky rectifier product line, engineered specifically for high-efficiency, low-VF rectification in automotive and industrial power supplies where thermal density and qualification rigor are critical.

FAQ

Is PMEG4005EGW-QJ pin-compatible with standard SOD123 Schottky diodes?

Yes - it uses the industry-standard SOD123 outline with anode (pin 2) and cathode (pin 1) positions matching JEDEC MO-203-AB. The cathode bar marking aligns with IPC-7351B standard orientation, ensuring drop-in replacement in existing SOD123 footprints without layout changes.

What is the maximum allowable PCB copper area for thermal relief at the cathode pad?

The datasheet specifies a 1 cm² tin-plated copper pad for cathode mounting to achieve the rated 0.5 A continuous current and 190 K/W Rth(j-sp). Using less than 0.5 cm² reduces thermal performance and requires current derating per Figure 1's transient impedance curves.

Does the guard ring affect electrical parameters like capacitance or leakage?

No - the guard ring is a structural feature isolated from the active junction. Measured diode capacitance (43 pF) and reverse leakage (30 µA) reflect only the main Schottky junction; guard ring adds no parasitic capacitance or leakage path, as confirmed in Nexperia's characterization reports.

Can PMEG4005EGW-QJ replace a 1N5819 in an existing design?

Yes, with caveats: both are 40 V/1 A Schottkys, but PMEG4005EGW-QJ has lower VF (420 mV vs. 450–600 mV), smaller SOD123 vs. DO-41 package, and AEC-Q101 qualification. Layout adaptation is needed for footprint, and thermal validation is required due to different Rth(j-a) values (310 K/W vs. ~60 K/W for DO-41).