ATX Version 3.0 Multi Rail Desktop Platform Power Supply

Design Guide

ID 336521
Date 01/02/2022
Version 2.0
Document Table of Contents

Separate Current Limit for 12V2 - OPTIONAL

The 12 V rail on the 2x2 power connector should be a separate current limited output to meet the requirements of UL and EN 62368-1. This only applies if the PSU is trying to meet a 240VA Energy Hazard Safety Requirement, most power supplies are not currently designed to meet this requirement.