Litz wire

Litz wire is a particular type of multistrand wire or cable used in electronics to carry alternating current (AC) at radio frequencies. The wire is designed to reduce losses due to the skin effect and proximity effect at frequencies up to about 1 MHz.^[1]

It consists of many thin wire strands, individually insulated and twisted or woven together, following one of several carefully prescribed patterns^{[2][better source needed]} often involving several levels of bundling (already-twisted wires are twisted together into small bundles, which are then twisted into larger bundles, etc.). The result of these winding patterns is to equalize the proportion of the overall length over which each strand is at the outside of the conductor. This has the effect of distributing the current equally among the wire strands, reducing the impedance.

Litz wire is used in high-Q inductors for radio transmitters and receivers operating at low frequencies, induction heating equipment, and switching power supplies.

The term litz wire originates from Litzendraht (coll. Litze), German for 'braided/stranded wire'^[3] or 'woven wire'.^{[4][better source needed]}