EN 55032 / CISPR 32 Class B Conducted Emission (CE) Limits
Class B Equipment – AC Mains Power Ports (Identical to legacy EN 55022 / CISPR 22 limits)
Quick reference for Class B Conducted Emission (CE) limits under EN 55032 / CISPR 32 and EN 55022 / CISPR 22 standards for AC mains power ports. The limits are identical between the standards.
Class B (Residential / Commercial)
* In the 0.15 to 0.50 MHz range, the limit decreases linearly with the logarithm of the frequency.
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EN 55032 Class B 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.
Note on EN 55022 / CISPR 22: EN 55032 / CISPR 32 has officially superseded the legacy standards EN 55022 and CISPR 22. However, the conducted emission limit requirements on AC mains power ports remain completely identical between the standards, meaning the limits presented here apply equally for evaluations under EN 55022 / CISPR 22.
Class B Equipment: Designed for use in residential environments. Because sensitive domestic radio, television, and wireless receivers are located closer to electrical networks in residential areas, Class B limits are approximately 10 dB stricter than Class A to avoid unacceptable radio frequency interference.
How to read the EN 55032 Class B conducted-emission reference
User task
Use this Class B page to inspect RF disturbance voltage from a multimedia device at its AC mains port. It explains the EN 55032 / CISPR 32 reference context for residential protection and does not turn a table lookup into a conformity claim.
Choose before comparing
Verify the AC mains port and the conducted measurement method before reading a margin. The displayed range is 0.15–30 MHz in dBµV; the Class B environment, detector, RBW, LISN and wiring conditions must remain separate from the Class A table, and no radiated distance is used.
What the displayed rows mean
- Frequency and unit
- 0.15–30 MHz is a conducted-voltage comparison at the AC mains port, expressed in dBµV.
- Receiver conditions
- Quasi-peak and average values are distinct rows; RBW, LISN and the actual mains-port wiring must match the applicable test method.
- Residential boundary
- Class B is the more protective residential-oriented class. A Class A result cannot be carried over to this table.
Common misread
The tighter Class B rows do not waive the required setup. Do not compare them with radiated field-strength results, substitute a different port, or treat a pre-compliance margin as proof of market access.
Reference boundary
EMCCalc presents a concise engineering reference based on the public IEC Webstore record. The applicable adopted standard and the complete test procedure remain the authority for formal EMC assessment.
Content review date:
Source and verification
- Primary source
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IEC Webstore — CISPR 32:2015+AMD1:2019 CSV Class B, conducted-emission requirements; check the adopted EN edition for market use
- Applicability
- Multimedia equipment in the applicable Class B environment; this lookup is not a product-scope determination.
- Read this limit with
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- AC mains power ports
- 0.15–30 MHz
- Quasi-peak and average detectors
- dBµV
- 0.15–0.50 MHz values follow the frequency-dependent line
- Last source-link and context review
- Verification method
- The source link, edition/section locator, and measurement context were reviewed against the values shown here. This reference is not a formal conformity assessment or certification.
Engineering reading
Choose the correct equipment class, port, detector, frequency range, facility, and distance before comparing a measurement to a limit.