Diodes Incorporated PD3S140-7

Overview

PD3S140-7 from Diodes Incorporated is a 1.0A, 40V surface-mount Schottky barrier rectifier in PowerDI®323 package, featuring 0.42V typical forward voltage at 0.5A, <4μA reverse leakage at 40V, and 22A non-repetitive surge capability. It serves as a polarity protection or freewheeling diode in automotive power rails and DC-DC converter outputs.

For engineers reviewing the PD3S140-7 datasheet, PD3S140-7 pinout, PD3S140-7 application, or PD3S140-7 equivalent, this page delivers verified electrical parameters, thermal resistance (R_θJS = 15°C/W), package dimensions, AEC-Q101 suitability context, and real-world automotive use cases without generic assumptions.

Technical Context

This Schottky rectifier uses guard ring die construction to suppress transient-induced junction breakdown and supports high-frequency switching with 32pF total capacitance at 10V reverse bias. Its low VF and fast recovery enable efficient operation in 100kHz–1MHz DC-DC converters.

Rated for -65°C to +150°C operation, it achieves 130°C/W R_θJA on polyimide PCBs and 175°C/W on FR-4 - critical for under-hood automotive modules where ambient temperature derating must be modeled per Figure 5.

Key Specifications

Pinout & Package

Package: PowerDI®323 - ultra-small surface-mount plastic case (2.50 × 1.90 × 0.13 mm), cathode-banded, matte tin-plated copper leadframe, moisture sensitivity level 1.

Key Features

Applications

Availability

PD3S140-7 is available at Aetrix Electronics and suitable for automotive ECU power protection, DC-DC converter freewheeling, LED headlamp drivers, and engine control unit input stages requiring stable component supply and AEC-Q101-aligned sourcing.

Supply support for PD3S140-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The PowerDI® rectifier product line targets space-constrained, thermally demanding applications in automotive, industrial, and consumer power systems - emphasizing low VF, high surge tolerance, and AEC-Q101 qualification readiness.

FAQ

Is PD3S140-7 AEC-Q101 qualified?

No - PD3S140-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation, but it is not individually AEC-Q101 stress-tested. Diodes offers AEC-Q101-qualified equivalents like SB140-13-F for certified automotive designs requiring full qualification evidence.

What is the recommended PCB pad layout for thermal performance?

Use the PowerDI323 outline from diodes.com/package-outlines.html: 2 oz. copper, minimum 25 mm² exposed pad area connected to internal ground planes via ≥4 thermal vias (0.3mm diameter, 0.8mm pitch). This achieves the 130°C/W R_θJA rating on polyimide boards.

How does PD3S140-7 compare to standard SOD-123 Schottky diodes?

PD3S140-7 delivers identical electrical specs in a 30% smaller footprint (2.5×1.9 mm vs. 3.7×2.7 mm) and 25% lower R_θJS (15°C/W vs. ~20°C/W) due to its copper leadframe construction - enabling higher power density in compact automotive modules.

Can PD3S140-7 replace SB140 in existing designs?

Yes - PD3S140-7 matches SB140's 40V/1A rating and shares identical electrical characteristics, but uses PowerDI323 instead of DO-214AA. Layout redesign is required for footprint and solder paste stencil; thermal performance improves by ~20% with equivalent copper area.