82-2-556-5067 82-2-557-1644 info@ydkgroup.com

We’re trusted by more than 280 clients.

Litz Wire & Cable Manufacturing for "Wireless Power" in Korea since 1990
< from fine size(48 AWG, 0.030mm) to Thickest size (more than 100mm OD ) >

We design the construction and provide you solutions.

We, YDK Inc., have built various kinds of Litz Wires from thin size of 0.030mm x 10 to 192,500 stranded(27,500 strands with Teflon x 7 bundles and make a cable extruded by non-flammable PVC 105℃) and of thickest size of 0.100mm x 64,500 stranded with Kapton or XLPE. Also rectangular type is available. As per customers’ requests and exact needs, we provide you Nylon(polyamid yarn) served, Kapton(polyimide film), Nomex(aramide paper), Teflon extrusion, Natural Silk(Mulberry, Silkwarm, Cocoons), Natural Cotton, XLPE, PVC, Mylar and Dacron type using our up-to-date manufacturing facilities. Also, depending on each customer’s needs, our R&D dept. develops new models based on customer’s specification FYR, our litz-wires are being used in many fileds for maximizing efficiency. Its applications are as following : Medical technology, Drive engineering, Automation, Railway Engineering, Power Electronics, Wireless power systems and Gears(non-contact charger, ex. cell-phone charger), Wind power generator, HF(High Frequency) transformer, HF inductor & choke, Reactors, Fluorescent lamp, Electronic ballast, CPS cable chain, Primary coil, Switched power supply, Toroid coil, UPS, LCD & LED TV, Deflection yokes, Hearing aids, Induction heating, Eximer laser, Magnetic loading, Power supply units, Proximity switches, Repeating coils, Ultrasonic generators and so on.

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Story About Our Goals

Know Us Better

Our company operation aiming all dedication and capability will make us the best manufacturers and suppliers which should lead the field of HF(High Frequency) Litz Wire of the whole world. Customer-oriented, Service-oriented and Market-oriented must be the most important goal for us. Would you mind providing us your specification of litz wire & cable? We, YDK Litz mfg., supply with the best solution for high efficiency of your transformers & inductors etc. Please do not hesitate to contact us!

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Advanced Technologies90%
Production Capacity95%
Utilization Rate85%
Customer Satisfaction99%
Square Meter
Happy Clients
1st Exported Year

Other Products Introduction

Select one of them below and Go to the page you find!

from 'No. 1. Application' to 'No. 4. Product range'

1. Application :
– High Frequency Transformer & Inductor, Wireless Power, Non-contact charger, Induction cooker, Electronic ballast, Magnetic Transformer, Wireless Energy Transfer Coil, On-line Electric Vehicle(Wireless Power Charging System), UPS, HF choke, Wind power generation systems, LCD & LED TV, Semi-conductors, Relays, Filters, Electro-magnetics, Cables and Solar power, Reactors, Choke coils, Cell-phone charger, Power supplies, Military equipment, Superconductor cables, Radar, Proximity switches, Earphones, Electronic quick starters, FBT(Fly back transformers), Hearing aids, Identification systems, IFT, Instrument transformers, Induction heating furnaces, Magnetic loading units, Rx and TX Coils for wireless power transmission system, HF Motors, Repeating coils, SMPS(Switching Mode Power Supply) transformer, Linearity & Width coils, Radio communication equipment, TV unit(HD TV, UHD TV), Welding machines, Wireless power transmission(Tram, high speed trains & buses), Wireless charging system (mobile phones, vehicles), Ultrasonic and sonar equipment, Ultrasonic generators, Writing unit for mobile phones, Fluorescent lamp.

#Low currents : Impedance transformer coils Telecommunication, Radio-location coils Telecommunication, Impulse transformer coils Telecommunication, Cathode ray tube deflection coils Television, Electronic ballast coils for fluorescent lamps Lighting

#High currents (Power electronic) :Inverters and converters Computer emergency power, Filtering and smoothing coils Railway material, Induction furnaces Industrial heating, Induction hotplates Public cooking material, Electric network inductance coils Electric power transmission

2. Fabricating : Served, Covered, Wrapping, Extrusion etc. | Single served(USTC), Double served(UDTC), UATC

3. Insulation : Kapton, Teflon® FEP(200℃), PFA(250℃), ETFE(180℃), PTFE(250~260℃), XLPE, PVC, sPEN, FEP(Polyimide), TIW(Triple Insulated Wire), Nylon(N-6, N-66), Nomex, Dacron, Mylar, Natural Silk(Mulberry, Silkwarm, Cocoons), Natural Cotton, Silicone, Polyethylene and Polyester etc.

4. Product range : from 0.030mm x 1150, 2150, 3150, even 192,000 strands to 0.10mm x 64,500 strands, Rectangular, Round & Flat type

※ As per your requests, we are able to provide you the most suitable solution.

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Litz wires are very useful conductors to reduce AC losses in high-frequency winding.

The top priority of litz wire regarding the design is the operating frequency. Operating frequency will be used to determine the size of each strand of litz wire construction, as well as affect the actual construction of the copper magnet wire. Litz construction is indicative of the skin effects, due to the limitations of number of stranding. Higher frequency ranges of litz-wire demand more strands of a thinner size gauge than same cross sectional area but consists of fewer and larger strands. Polyurethane or polyester coated material shields low electrical losses and solderability of ease, because each strand insulation typically used in enamels and polyurethanes. Other insulation in addition are also available such Nomex, Kapton, Dacron, Mylar, Silk, Teflon, PVC etc. In most cases, the litz wire is wrapped by nylon single or double served, of a textile yarn as well as unserved available. The breakdown voltage or the protection of the environment should be satisfied with special requirements, special film coatings on each individual strand are available as well as double and even triple insulation overall to meet the demands of UL and IEC regulations.

Litz Wire has the following advantages :
– High efficiency
– Downed operating temperature
– Reduced footprint of the final product
– Significant weight reduction.
– The avoidance of ” Hot spot ”
– Relief of skin and proximity effects
– Minimum eddy-current losses.

Use of YDK Litz cables
– Litz Cables are used for all electrical coils requiring a low level of losses when alternating currents go through them.
– The range of frequencies for which YDK Litz Cables can be necessary is very infinite : from a few hundred Hertz (Induction Heating Transformers) to many Mega-Hertz (Pulse Transformers).

Magnet wire films are in business in order to meet these different needs, film, fiber, tape wrap, and a wide range of extruded insulation. A round, square and rectangular shape are manufactured to meet the requirements. Litz wire manufacturer, Y D Kim Int’l Inc., has accumulated lots of technologies with very competitive price and reliable quality since 1990 in South Korea.

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What can I do for you? Please do not hesitate to contact to us.


We always try to solve your problem or reply you within 24 hours from the moment to get your request.


YDK believe the customer’s mind is expressed through the Market. We will surely catch it and give it to you for your benefits.

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Please do not hesitate to contact us when you need helps.

Would you mind providing us your specification with order volume per shipment. Sometimes, the picture and drawing are very helpful to us. It makes us quote you much quicker. Anyway, do not hesitate to contact us via ‘Contact form’ or e-mail.

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