Nexperia USA Inc. PMEG3005AEA-QX

Overview

PMEG3005AEA-Q from Nexperia is a planar Schottky barrier rectifier with integrated guard ring for stress protection, housed in an AEC-Q101-qualified SOD323 (SC-76) package. It delivers 30 V reverse voltage rating, 380–430 mV forward voltage at 500 mA, 10 A non-repetitive peak surge current, and operates up to 150 °C junction temperature - optimized for low-voltage automotive power rail rectification.

For engineers reviewing the PMEG3005AEA-Q datasheet, PMEG3005AEA-Q pinout, PMEG3005AEA-Q application, or PMEG3005AEA-Q equivalent, key selection criteria include ultra-low VF performance under pulsed 500 mA loads, AEC-Q101 qualification for under-hood use, thermal resistance to solder point (90 K/W), and cathode-marked SOD323 footprint compatibility with high-density PCB layouts.

Technical Context

This discrete Schottky diode uses a planar silicon structure with integrated guard ring to suppress edge breakdown and improve robustness against transient overvoltage and thermal stress. Its low barrier height enables sub-430 mV VF at 500 mA while maintaining <150 µA IR at 30 V reverse bias.

The device is characterized under pulsed conditions (tp ≤ 300 µs, δ ≤ 0.02) to reflect real-world DC/DC converter switching behavior. Thermal design relies on Rth(j-sp) = 90 K/W to the cathode solder point - critical for sustained 0.5 A continuous forward current in constrained automotive modules.

Key Specifications

Pinout & Package

Encapsulated in a SOD323 (SC-76) surface-mount plastic package measuring 1.7 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch. Cathode identified by marking bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB521S-30T2R and SS12-AU, PMEG3005AEA-Q uniquely combines AEC-Q101 qualification, sub-430 mV VF, and SOD323 size - making it the only option meeting automotive-grade efficiency and miniaturization requirements simultaneously.

Availability

PMEG3005AEA-Q is available at Aetrix Electronics and suitable for automotive body electronics, USB-C power interface protection, and low-power sensor node rectification requiring stable component supply across multi-year production cycles.

Supply support for PMEG3005AEA-Q 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 part belongs to Nexperia's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for low-loss, high-surge automotive power management in space-constrained modules.

FAQ

Is PMEG3005AEA-Q suitable for continuous 500 mA DC operation?

No - its rated continuous forward current is 0.5 A only under specific thermal conditions. At 0.5 A DC, junction temperature rises rapidly unless Rth(j-a) is reduced below 210 K/W via large copper pours. For sustained 500 mA, use pulsed operation or verify thermal design with Rth(j-sp) = 90 K/W to cathode pad.

What does the 'E4' marking indicate on the device top side?

The 'E4' laser marking identifies the PMEG3005AEA-Q variant per Nexperia's internal coding system. It corresponds to the full type number and confirms AEC-Q101 qualification status; no additional decoding or date code is embedded in this two-character mark.

Can PMEG3005AEA-Q replace a standard 1N5819 in an existing design?

Only with layout and thermal review. While both are Schottky rectifiers, PMEG3005AEA-Q has lower VF (430 mV vs. ~450 mV) and smaller SOD323 package versus DO-41. The footprint change requires PCB redesign, and its 30 V VR is lower than 1N5819's 40 V - verify reverse voltage margin in your application.

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

Yes - the guard ring increases junction area slightly, raising typical diode capacitance to 55–70 pF (vs. ~45 pF for non-guarded equivalents) and contributing to the upper bound of IR (150 µA). These values are fully characterized and included in the datasheet's "Characteristics" table.