Nexperia USA Inc. PMEG4005AEA-QF

Overview

PMEG4005AEA-Q from Nexperia is a planar Maximum Efficiency General Application (MEGA) Schottky barrier rectifier with integrated guard ring for stress protection, housed in an AEC-Q101-qualified SOD323 package. It delivers 40 V reverse voltage rating, 420–470 mV forward voltage at 500 mA, and supports 10 A non-repetitive peak forward current - optimized for low-voltage rectification and inverse polarity protection in automotive power rails.

For engineers reviewing the PMEG4005AEA-Q datasheet, PMEG4005AEA-Q pinout, PMEG4005AEA-Q application, or PMEG4005AEA-Q equivalent, key selection criteria include its ultra-low VF performance, AEC-Q101 qualification, thermal resistance to solder point (90 K/W), and compact 1.7 mm × 1.25 mm footprint for space-constrained DC/DC converter layouts.

Technical Context

This Schottky diode uses a planar MEGA structure with integrated guard ring to suppress edge breakdown and improve surge robustness. Its low-barrier metal-semiconductor junction enables sub-470 mV VF at 500 mA while maintaining <100 µA IR at 40 V - critical for minimizing conduction loss in 3.3 V/5 V rail clamping and reverse-battery protection circuits.

Thermal design is enabled by low Rth(j-sp) = 90 K/W to cathode tab, verified on FR4 PCB with 1 cm² cathode pad. The device operates up to 150 °C junction temperature and sustains 3.5 A repetitive peak forward current under δ ≤ 0.5 duty cycle - supporting high-efficiency synchronous rectifier auxiliary paths.

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 and cathode-marked bar.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB521S-40T2R and SS14-E3/5AT, PMEG4005AEA-Q uniquely combines AEC-Q101 compliance, sub-470 mV VF, and 1.7 mm × 1.25 mm footprint - making it the only option qualified for space- and efficiency-critical automotive subsystems operating at ≤500 mA.

Availability

PMEG4005AEA-Q is available at Aetrix Electronics and suitable for automotive reverse polarity protection, low-voltage DC/DC converter rectification, voltage clamping, and low-power consumption applications requiring stable component supply across production lifecycles.

Supply support for PMEG4005AEA-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 essential semiconductors - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

PMEG4005AEA-Q belongs to Nexperia's MEGA Schottky rectifier product line, engineered specifically for ultra-low forward voltage and AEC-Q101-compliant operation in automotive power management and protection circuits.

FAQ

Is PMEG4005AEA-Q suitable for reverse battery protection in 12 V automotive systems?

Yes. With 40 V reverse voltage rating, 10 A non-repetitive peak forward current, and AEC-Q101 qualification, it reliably blocks reverse current during incorrect battery installation while surviving load-dump transients. Its 420–470 mV VF minimizes voltage drop and heat generation at typical 500 mA system currents.

What is the thermal performance difference between Rth(j-a) and Rth(j-sp) for this diode?

Rth(j-a) is 450 K/W (free air), while Rth(j-sp) is 90 K/W to the cathode solder point on FR4 with 1 cm² copper. This 5× improvement confirms effective heat transfer via the cathode pad - making PCB layout with adequate cathode copper critical for thermal reliability in continuous 500 mA operation.

Does the SOD323 package support automated optical inspection (AOI) after reflow?

Yes. The SOD323 outline (1.7 mm × 1.25 mm) and cathode-marking bar provide clear fiducial contrast for AOI systems. Reflow footprint dimensions (0.6 mm × 0.5 mm lands, 1.5 mm spacing) comply with IPC-7351B Class B standards, enabling reliable solder-joint inspection without shadowing.

How does the integrated guard ring affect long-term reliability under repeated surge stress?

The guard ring redistributes electric field at the die edge, preventing localized avalanche and reducing degradation of reverse leakage over time. Tested per AEC-Q101, it enables stable IR performance (<100 µA) after 1000 cycles of 10 A/8 ms surge - critical for automotive modules exposed to frequent ignition transients.