Standard
IEC 61340-5-1:2024
General requirements for an ESD control program protecting electronic devices. Edition 3.0 published in 2024.
What it means for your floor
Edition 3.0 changed the humidity rule
The 2024 edition lets a facility qualify its ESD control items, flooring included, at the lowest relative humidity that facility actually experiences across the year, rather than against a fixed arbitrary low humidity benchmark. For a Texas plant with a dry winter and a wet summer that is a meaningful difference in what the certificate describes.
It also defined two terms formally
Edition 3 added formal definitions of insulator and isolated conductor. Those definitions matter for what has to be controlled in a room, not only for the floor.
The legacy series path
EN and IEC 61340-5-1 still carry the 3.5 x 107 ohm ceiling for a person, footwear and floor measured in series, the approach S20.20 used before 2014. A spec quoting that number is on this path, not out of date.
