Litz Wire
Multi-strand winding wire for high-frequency coils. Fine enameled strands are twisted or braided into one conductor so the current spreads through the whole bundle instead of crowding at the surface — which keeps AC resistance close to the DC value and keeps the winding cooler.
- Thermal class
- 200 · 220
- Strand diameter
- 0.15 – 0.80 mm
- Strands
- 10 – 130
- Conductor
- Copper · CCA
What Is Litz Wire?
Litz wire is a conductor built from many individually enameled fine strands twisted or braided together. In a solid conductor at high frequency the current is pushed towards the outer skin and towards the zones nearest neighbouring turns, so the usable copper shrinks and AC resistance rises. Splitting the same cross-section into insulated strands and transposing them distributes the current across the whole bundle, reducing resistance and loss at frequency.
Why stranding works
Two effects drive AC loss in a winding. The skin effect pushes current to the outside of the conductor; the proximity effect pushes it towards or away from neighbouring turns. Both leave part of the copper carrying almost nothing. Because each litz strand is enameled and the bundle is transposed along its length, every strand spends a comparable share of the run in each position, so the current divides evenly and the effective resistance stays close to the DC figure.
What you get
- Low AC resistance and reduced loss in high-frequency windings
- Cooler running coils, so more output from the same winding space
- High flexibility — easier to wind on tight bobbins and toroids
- Class 200 and class 220 constructions for demanding thermal duty
- Strand size, strand count and lay built to your winding data
Jingda Litz Wire Options
Choose the conductor first — copper for the lowest resistance, copper-clad aluminum where weight and cost matter more — then the thermal class your winding hot spot requires. Strand diameter and strand count follow from the operating frequency and the current.
| Product | Conductor | Thermal class | Type designation | Strand Ø (mm) | Strands |
|---|---|---|---|---|---|
| Polyester(imide) overcoated polyamide-imide litz wire | Copper | 220 | Q(ZY/XY)LJ-/220 | 0.15 – 0.80 | 10 – 130 |
| Polyester(imide) overcoated polyamide-imide litz wire | Copper | 200 | Q(ZY/XY)LJ-/200 | 0.15 – 0.80 | 10 – 130 |
| Polyester(imide) overcoated polyamide-imide CCA litz wire | Copper-clad aluminum | 220 | Q(ZY/XY)J-/220CCA | 0.15 – 0.80 | 10 – 130 |
| Polyester(imide) overcoated polyamide-imide CCA litz wire | Copper-clad aluminum | 200 | Q(ZY/XY)J-/200CCA | 0.15 – 0.80 | 10 – 130 |
Need a solid round conductor instead of a stranded bundle? See 200-class enameled copper wire or the full enameled wire range.
Litz Wire Specifications
| Parameter | Value |
|---|---|
| Standards | IEC 60317 · NEMA MW 1000 · JIS C3202 |
| Type designation — copper | Q(ZY/XY)LJ-/220 · Q(ZY/XY)LJ-/200 |
| Type designation — CCA | Q(ZY/XY)J-/220CCA · Q(ZY/XY)J-/200CCA |
| Thermal class | 200 °C · 220 °C |
| Strand diameter | 0.15 – 0.80 mm |
| Number of strands | 10 – 130 |
| Conductor | Electrolytic copper · copper-clad aluminum |
| Strand insulation | Polyester(imide) basecoat with polyamide-imide overcoat |
| Construction | Twisted or braided, lay length to customer specification |
| UL | Approved — no ANSI type designation assigned |
Performance and Applications
Jingda litz wire is built for windings that run at frequency: induction heating coils, switching transformers, resonant chokes and audio coils. Because the bundle keeps AC resistance close to the DC value, the winding dissipates less heat at the same current, which protects the insulation system and leaves more margin in the design.
Typical Applications
Quality and Compliance
Every production lot is tested in Jingda’s CNAS-accredited laboratories and the results are held against the lot number, so a delivered spool can be traced back to its test record. Jingda operates an ISO 9001 and IATF 16949 certified quality system.
Technical Data Sheet
Strand diameter, strand count, lay length and insulation build are set per construction. Send your winding data and a Jingda engineer will return a full data sheet with the quotation.
Talk to an EngineerQuality Certificates
Substance Compliance
Tongling Jingda Special Magnet Wire Co., Ltd.
We are one of the world’s leading magnet wire manufacturers, based in Tongling City — one of China’s principal copper production bases. Listed on the Shanghai Stock Exchange since 2002 (600577), the group runs a national-level enterprise technology centre, a national-level postdoctoral research station and the Jingda Magnet Wire Research Institute.
Jingda magnet wire is wound into products across new-energy vehicles, photovoltaics, robotics, aerospace, home appliances, specialty motors, 5G communications and electronics.
Ordering, Packaging and Delivery
| Commercial term | Detail |
|---|---|
| Minimum order quantity | Agreed per construction and strand size. Sample and pilot-order quantities are agreed case by case. |
| Lead time | Normally within 30 days from order confirmation; stock constructions dispatch earlier where available. |
| Incoterms | FOB by default; other Incoterms on request. |
| Quotation response | Within 1 business day. |
Packaging and shipment — litz wire
Litz wire is supplied on spools sized to the strand count and bundle diameter. Single spools for samples or small orders are packed individually in a wooden case or paper drum. Volume shipments use fumigation-free wooden pallets, with cartons or fibreboard collars protecting the spools and stretch film securing the load.
Spool type, wire weight per spool and pallet build are confirmed per order.
Frequently Asked Questions
What is litz wire used for?
How do I specify a litz wire construction?
Copper or copper-clad aluminum litz — which should I choose?
What thermal classes are available?
Can Jingda produce a non-standard stranding, serving or bundle?
Can we become a Jingda distributor or agent?
How does Jingda support customers after the order?
Request a Quote or Sample
Tell us your specification — a Jingda sales engineer will respond within 1 business day with a quotation or technical feedback.
