Diodes Incorporated PDS3100Q-7

Overview

PDS3100Q-7 from Diodes Incorporated is a 100V, 3A automotive-grade Schottky barrier rectifier in POWERDI®5 package, featuring 0.76V max forward voltage at 3A/25°C, <100μA reverse leakage at 100V/25°C, and AEC-Q101 qualification-designed for polarity protection and recirculating diode functions in 12V/24V automotive power rails.

For engineers reviewing the PDS3100Q-7 datasheet, PDS3100Q-7 pinout, PDS3100Q-7 application, or PDS3100Q-7 equivalent, key selection criteria include its low VF (0.61V typ @ 3A/100°C), high IFSM (90A), RθJS of 6.0°C/W, and validated thermal performance on FR-4 and polyimide PCBs per AP02001/AP02002 layout guidelines.

Technical Context

This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche failure and sustain repetitive 90A non-repetitive surge current under 8.3ms half-sine conditions. Its low 0.71V typical forward voltage at 3A/25°C directly reduces conduction loss in high-duty-cycle DC/DC output stages.

Thermal design is enabled by dual thermal paths: junction-to-soldering-point resistance is fixed at 6.0°C/W, while junction-to-ambient varies (95/70/50°C/W) depending on PCB copper weight, pad geometry, and substrate material-requiring explicit layout adherence to Diodes' AP02001 recommendations.

Key Specifications

Pinout & Package

POWERDI®5 is a surface-mount, thermally enhanced 2-pin package with exposed cathode pad for PCB heat sinking. Anode and cathode terminals are located on left and right sides respectively; both pins must be electrically connected to PCB copper for mechanical stability and thermal conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB3100-E3/57T and SS310H, PDS3100Q-7 delivers superior thermal performance (6.0°C/W RθJS vs. ≥75°C/W) and lower conduction loss in automotive power rails requiring continuous 3A operation with minimal voltage drop and board area.

Availability

PDS3100Q-7 is available at Aetrix Electronics and suitable for Engine Control Units, Body Control Modules, ADAS camera power supplies, and Electric Power Steering systems requiring stable component supply with AEC-Q101 compliance and PPAP documentation support.

Supply support for PDS3100Q-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 PDS3100Q belongs to Diodes' automotive-qualified Schottky rectifier product line, engineered specifically for high-reliability 12V/24V vehicle subsystems demanding low VF, high surge tolerance, and extended temperature operation.

FAQ

What is the maximum allowable junction temperature for PDS3100Q-7 during continuous operation?

The absolute maximum junction temperature is +150°C per datasheet DS33876 Rev. 1–2. For reliable long-term operation in automotive applications, Diodes recommends maintaining TJ ≤ +125°C using the derating curve in Figure 6, which defines maximum IF versus ambient temperature based on PCB thermal design.

Does PDS3100Q-7 require a heatsink on the PCB?

No discrete heatsink is required. The POWERDI®5 package relies on PCB copper as the thermal interface: the exposed cathode pad must be connected to ≥1 cm² of 2 oz. copper per AP02001 layout guidelines to achieve the specified RθJA of 95°C/W (FR-4) or 50°C/W (polyimide with optimized pads).

How does the guard ring structure improve transient robustness?

The guard ring surrounds the active Schottky junction to distribute electric field gradients and prevent premature edge breakdown during fast-rising transients like load dump (ISO 7637-2 Pulse 5a). This allows the device to sustain rated VRRM without avalanche failure under real-world automotive electrical stress.

Can PDS3100Q-7 be used in non-automotive industrial applications?

Yes-its electrical and thermal specifications are identical to standard-grade equivalents. However, only the Q-suffix version is AEC-Q101 qualified and PPAP-capable; industrial users benefit from the same low VF and high IFSM but should verify qualification requirements with their end-customer if targeting automotive-tier supply chains.