Nexperia USA Inc. PMEG4005CEJX

Overview

PMEG4005CEJX from Nexperia is a planar Schottky barrier rectifier with integrated guard ring for stress protection, designed for low-voltage, high-efficiency DC-to-DC conversion and reverse polarity protection. It delivers 0.5 A average forward current at 40 V reverse voltage, with typ. 550 mV forward voltage at 500 mA and 1.5 µA reverse leakage at 25 °C - enabling compact power management in space-constrained SMD applications.

For engineers reviewing the PMEG4005CEJX datasheet, PMEG4005CEJX pinout, PMEG4005CEJX application, or PMEG4005CEJX equivalent, this device is selected for low-VF rectification where thermal performance, small footprint (SOD323F), and stable reverse leakage across -40 °C to 125 °C operating range are critical design requirements.

Technical Context

This 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, while the ultra-low IR (1.5 µA @ 25 °C) reflects tight process control of barrier height and surface passivation.

Thermal performance is defined by two mounting configurations: Rth(j-a) = 300 K/W on standard FR4 and 175 K/W with 1 cm² cathode pad - directly supporting derating decisions in thermally constrained layouts. Reverse recovery time is negligible (trr = 1.8 ns), eliminating switching losses in high-frequency SMPS topologies.

Key Specifications

Pinout & Package

Encapsulated in SOD323F (SC-90) package: 1.7 mm × 1.25 mm × 0.7 mm body, flat lead surface-mount plastic case with standardized reflow footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB521S-40T1G and SDM05U40LP-7, PMEG4005CEJX uniquely balances VF, IR, thermal resistance, and footprint - making it optimal for space-constrained, thermally moderate 0.5 A rectification where both efficiency and standby current matter.

Availability

PMEG4005CEJX is available at Aetrix Electronics and suitable for USB Power Delivery input protection, point-of-load DC-DC converter output rectification, and automotive body control module reverse polarity protection requiring stable component supply and consistent parametric performance across production lots.

Supply support for PMEG4005CEJX 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 leading Dutch semiconductor company specializing in high-volume, high-reliability discrete and logic devices, with manufacturing rooted in process excellence and automotive-grade quality systems.

This device belongs to Nexperia's low-VF Schottky rectifier product line, engineered specifically for high-efficiency power conversion in consumer, industrial, and non-automotive automotive applications - emphasizing thermal robustness, parametric consistency, and SMD scalability.

FAQ

Is PMEG4005CEJX qualified for automotive applications?

No. Per Nexperia's revision history, this part was explicitly changed to non-automotive qualification in v.2 (2025). It lacks AEC-Q101 stress testing and automotive-specific failure reporting. For automotive use, select the -Q qualified variant (e.g., PMEG4005CEJX-Q) or consult Nexperia's automotive portfolio.

What is the maximum pulsed forward current rating?

The non-repetitive peak forward current (IFSM) is 8 A for tp = 8 ms square wave at Tj(init) = 25 °C. Repetitive peak current (IFRM) is 2 A for tp ≤ 1 ms and duty cycle ≤ 0.25. These values assume proper PCB thermal design per datasheet mounting conditions.

Can PMEG4005CEJX replace a standard PN junction diode in a 5 V SMPS?

Yes - with measurable improvement. At 500 mA, its 550 mV VF reduces conduction loss by ~450 mW versus a typical 1 V PN diode, lowering temperature rise and improving efficiency by 2–3% in 5 V/1 A buck converters. No circuit changes are needed beyond verifying layout thermal relief.

How does the guard ring affect reliability in real-world PCB environments?

The integrated guard ring mitigates electric field crowding at the die edge, raising the effective breakdown voltage by ~15% under mechanical stress (e.g., board flex or thermal cycling). This extends operational life in handheld devices and industrial controllers subject to vibration or repeated thermal shock.