An Availability Class is a resilience rating in the European EN 50600 data center standard, from Class 1 (lowest) to Class 4 (highest), expressing how well a facility's design protects against disruption and supports maintenance. Higher classes require greater redundancy and independence in power, cooling, and other systems, giving operators a standardized benchmark comparable to tier ratings.
Category: Resilience & Availability · Subcategory: Tier & Class Systems · Part of the AIDC Technical Terminology reference.