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EN 55032 / CISPR 32 Class A Conducted Emission (CE) Limits

Class A Equipment – AC Mains Power Ports

Quick reference for the EN 55032 / CISPR 32 Class A Conducted Emission (CE) limit requirements for AC mains power ports. Quasi-peak and Average limit tables and charts.

Limit Visualization Curve

Class A (Industrial)

Frequency (MHz) Quasi-peak (dBµV) Average (dBµV)
0.15 - 0.5 79 66
0.5 - 30 73 60

EN 55032 Class A Conducted Emission Overview

EN 55032 (harmonized under the EU EMC Directive and aligned with CISPR 32) details the electromagnetic emission requirements for Multimedia Equipment (MME). Conducted Emission (CE) testing on AC mains ports measures the RF disturbance voltage fed back onto the power grid to ensure the protection of public power distribution systems.

Class A Equipment: Designed for use in commercial, industrial or business environments. Class A limits are less stringent compared to Class B because commercial and industrial electrical environments are expected to tolerate larger ambient electromagnetic noise. Devices passing Class A limits but failing Class B cannot be marketed for residential use and must carry appropriate warnings.