Common Mode ChokesHigh-µ · Power Line

CMC / High-µ / Power Line

High-µ ferrite common mode choke for power-line EMI filtering. Wound and 100% tested for L and DCR in-house.

Style: High-µ CMC
Core: High-µ ferrite
Mounting: THT
Test: L, DCR, hipot

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2–3 week lead time
Prototype to bulk
Wound to your spec

Part outline

CoreHigh-µ ferrite
MountingThrough-hole
OrientationHorizontal

Construction

High-µ Ferrite Core, Copper Winding

Configuration · High-µ · Power Line

How it works

Blocks the noise, passes the power

A series inductor in the supply line that somehow presents almost no impedance to the load current. The trick is winding direction — and it is easier to see than to describe.

Differential mode

Passes

FLUX CANCELS → low impedance

Load current flows out on one line and back on the other. The two fluxes are equal and opposite, so they cancel in the core — the choke is nearly invisible and your supply current is untouched.

Common mode

Blocks

FLUX ADDS → high impedance

Noise appears on both lines in the same direction at once. Now the fluxes add, the core presents its full impedance, and the noise is choked off before it reaches the mains.

Both windings share one core · current direction decides the outcome

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.

Style: High-µ CMC
Core: High-µ ferrite
Mounting: THT
Test: L, DCR, hipot

Typical applications

Toroidal and UU-core common mode chokes for EMI/RFI suppression. Used to bring switching supplies, drives and chargers into conducted-emissions compliance.

EMC compliance
Chargers
Drives
Appliances
Lighting
Medical

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Need CMC / High-µ / Power Line to a different specification?

Send your inductance, turns ratio, current rating and mechanical envelope — we will come back with a design and a price.

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