EMC Filter Calculator

CISPR Limit Class

Filter Topology

Frequency Range Start

kHz

Frequency Range End

kHz

Measured Emissions

dBuV

Source Impedance

ohm

Load Impedance

ohm

CompliancePASS

Max Required Attenuation40.0 dB

Worst-Case Margin10.3 dB

Emissions vs CISPR Limit

Unfiltered Filtered CISPR Limit

CM Choke1.49 mH

DM Inductor148.7 uH

X Capacitor0.059 uF

Y Capacitor4.7 nF

Y capacitors at safety limit (4.7 nF). Verify leakage current per IEC 60950-1 / IEC 62368-1.