Single-phase AC line filter rated 1A, for adapters, smart meters and small instrumentation. Attenuates conducted noise in both directions, so it also stops the supply polluting the mains.
The one product here that is an assembly rather than a wound part. Characterised and tested as a block, so the attenuation you specify is the attenuation you measure.
CM choke — High impedance to noise on both lines at once; invisible to the load current.
X2 across the lines — Shunts differential noise — the kind a switching supply makes.
Y2 to earth — Returns common-mode noise to earth. Safety-rated, and capacitance-limited by leakage current rules.
Insertion loss
Frequency
Single stage
Dual stage
150 kHz — where conducted-emissions limits begin. A filter that only works above a few MHz will not pass the scan.
Attenuation across the conducted-emissions band
Single-stage topology · add a second stage when one leaves no margin
Specification
Published figures describe the standard build. Every part is wound to order — send your exact requirement and we will confirm the specification on the quotation.
Rated Current
1A
Rated Voltage
250VAC
Type
Single Stage
Common Mode Inductance
10mH - 33mH
Mounting
PCB
Application
Conducted Emissions Compliance
Typical applications
Single-phase AC line filters combining a common mode choke with X and Y capacitors in one assembly, characterised and tested as a block. Rated 1A to 10A, with custom builds designed around the emissions scan that failed.