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Product

High-frequency enamelled Litz winding wire10 kHz – 5 MHz ACØ 0.02 – 0.50 mm StrandsClass 155 / 180 / 200

HF Litz Wire Multi-Strand Enamelled High-Frequency Litz WindingMulti-strand enamelled copper high-frequency Litz wire (10 kHz – 5 MHz) to IEC 60317-11

Precision multi-bundle high-frequency Litz winding wire (HF Litz Wire) constructed from 7 to 10,000+ individually insulated fine enamelled copper strands (0.020 mm / 52 AWG to 0.50 mm / 24 AWG) twisted in concentric planetary stages to suppress AC.

Flame-retardant
Approved
Ozone, UV & moisture
Order designation
LITZ-600X0.071-PU180-ETFE
Target frequency
100–350 kHz
Net Cu area
2.38 mm²
Nominal OD
2.80 mm
Typical R_DC
7.68 mΩ/m
All sizes (12)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Frequency band
10 kHz to 5 MHz
Skin-depth matched strand Ø
Single strand Ø
0.020 – 0.50 mm
52 AWG to 24 AWG Grade 1 / 2
Strand count
7 to 10,000+
Single-twist Type 1 & multi-stage Type 2
Thermal class
Class 155–200°C
Solderable PU, PEI or PEI+PAI
Outer serving
Silk/PA/PI/ETFE
Silk/Nylon yarn, PI/PET tape or ETFE
Profile options
Round & Profiled
Compacted Type 8 up to 72 % fill

Typical values for this cable type, based on IEC 60317-11 / IEC 60317-20 / IEC 60317-51 / NEMA MW 1000 (MW 79-C / MW 80-C) — confirmed in the datasheet and quotation for your order.

Application fit

Is HF Litz Wire right for your machine?

Essential for SiC/GaN resonant LLC converters, EV inductive wireless charging pads (85 kHz SAE J2954), induction heating coils, and medical/industrial HF transformers.

VFD inverter to AC motor screened feeder

Suitable

True planetary bundle transposition equalizes radial/axial H-field exposure so R_AC / R_DC stays near 1.05–1.25 at 20–500 kHz.

Switchgear & control cabinet wiring

Suitable

Available with extruded ETFE/FEP/PFA or triple-taped polyimide outer insulation for reinforced primary-to-secondary safety isolation.

Furnace, kiln & high-temp zone

Suitable

Class 180 (solderable PU/PEI) and Class 200 (PEI+PAI) grades withstand high-power induction heating and SiC planar transformer hotspots.

Fixed installation

Suitable

Thermoplastic self-bonding overcoat (SB-Litz) fuses wound coils via hot air or current pulse without bobbins or impregnating varnish.

Typical machinesSiC & GaN High-Frequency LLC / DAB Power ConvertersEV Static & Dynamic Wireless Power Transfer (85 kHz SAE J2954)Industrial Induction Heating, Brazing & Melting CoilsSolar String Inverters, EV On-Board Chargers (OBC) & DC Fast ChargersUltrasonic Transducers, MRI Gradient Coils & RF Antennas

Construction

Layer by layer

Representative multi-stage Type 2 / Type 8 build: N1 × N2 × N3 planetary-transposed strands of Ø 0.050 mm (44 AWG) to Ø 0.200 mm (32 AWG) Grade 1/2 solderable Polyurethane (Class 155/180) or PEI+PAI (Class 200) enamelled OFHC copper + optional nylon/natural-silk yarn serving, overlapped polyimide/PET film tape, or extruded ETFE/FEP jacket.

123
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Individually enamelled fine OFHC copper strands (Ø 0.020–0.50 mm)High-purity oxygen-free copper drawn to a diameter smaller than twice the AC skin depth δ at the operating frequency, coated with Grade 1 or Grade 2 solderable Polyurethane (IEC 60317-20/-51) or Class 200 PEI+PAIEliminates skin-effect current crowding inside each individual strand and allows direct dip-soldering at +375–390 °C (PU grades)
2Multi-stage planetary Roebel bundle transposition (Type 1 / 2 / 7 / 8)True concentric cabling (e.g. 5 × 5 × 42 = 1,050 strands) where every strand rotates continuously between the centre and outer surface of the conductorCancels internal circulating currents caused by proximity-effect magnetic fields in multi-layer transformer windings
3Outer serving, film-tape wrap or extruded fluoropolymer jacketChoice of Unserved (U), Single/Double Nylon or Natural Silk yarn serving (SN/DN/SS), Self-Bonding thermoplastic overcoat (SB), overlapped Polyimide/PET film tape, or extruded ETFE/FEP/TIW wallProvides mechanical bundle cohesion, high inter-winding breakdown voltage (up to 3–10 kVrms) and bobbin-free coil forming

HF-LITZ-SERVED (Type 1 & Type 2 Nylon / Silk / Self-Bonding)

Unserved, nylon/silk textile-served or hot-air self-bonding round Litz wire for gapped ferrite inductors, wireless charging coils and induction heaters

HF-LITZ-TAPED / EXTRUDED (HV Polyimide-Taped or ETFE/FEP Jacketed)

Overlapped polyimide/PET film-taped or extruded ETFE/FEP insulated Litz wire rated 1.5 kV to 10 kV peak for HV LLC & solid-state transformers

HF-LITZ-RECT (Type 7 & Type 8 Compacted Rectangular Profile)

Roller-compacted rectangular Litz profile achieving 65–72 % copper slot fill factor for high-density EV traction & aerospace generators

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60317-11 / IEC 60317-20 / IEC 60317-51 / NEMA MW 1000 (MW 79-C / MW 80-C). Values for your order are confirmed in the datasheet and quotation.

Electrical

Recommended frequency match
10–50 kHz: Ø 0.20 mm (32 AWG) · 50–100 kHz: Ø 0.10 mm (38 AWG) · 100–350 kHz: Ø 0.071 mm (41 AWG) · 350 kHz–1 MHz: Ø 0.050 mm (44 AWG) · 1–5 MHz: Ø 0.030 mm (48 AWG)
Strand enamel breakdown
Grade 1 or Grade 2 per IEC 60317-0-1
Outer jacket breakdown (taped/extruded)
1.5 kVrms to 10 kVrms (custom HV solid-state transformer grades)

Thermal

Solderable Polyurethane (PU)
Class 155 (IEC 60317-20) & Class 180 (IEC 60317-51), direct dip-solderable at +375–390 °C
High-temp PEI / PEI+PAI
Class 180 / Class 200 (IEC 60317-13 / -26) for high-temp vacuum pressure impregnation

Mechanical

Total copper cross-section
0.05 mm² to 120 mm² (7 to 12,000+ strands)
Compacted rectangular fill
65 % to 72 % copper fill factor (Type 8 profiled Litz)

Resistance

Varnish & oil compatibility
Compatible with epoxy VPI resins, silicone potting & transformer oils
Partial discharge (HV grades)
Corona-resistant polyimide/ETFE outer barriers for SiC dv/dt > 50 V/ns

Reference standards

International standards
IEC 60317-11 · IEC 60317-20 · IEC 60317-51 · NEMA MW 1000 (MW 79-C / 80-C)
RoHS & REACH
2011/65/EU + (EU) 2015/863 compliant

Identification

Reel labelling
Strand count × Ø (mm / AWG), cabling formula, enamel class, outer serving & DC resistance
Customs tariff (HS)
8544.11

Sizes

12 representative HF Litz Wire builds across 10 kHz – 2 MHz power electronics bands

Matched strand diameter vs switching frequency, planetary cabling structure, net copper area, outer diameter and DC resistance.

Frequency band, strand Ø, count, Cu area & OD
Order designationTarget Freq.
Band		Strands × Ø mm (AWG)Enamel & Outer InsulationNet Cu
mm²		Nom. OD / H×W
mm		Typ. R_DC
mΩ/m		Enquiry
10 kHz – 100 kHz Litz Builds (Induction Heating, 85 kHz EV Wireless & Solar/OBC Inductors)
LITZ-60X0.20-PU180-SN10–50 kHz60 × 0.20 mm (32 AWG)PU 180 + Single Nylon1.882.159.55
LITZ-200X0.20-PU180-DN10–50 kHz5×40 × 0.20 mm (32 AWG)PU 180 + Double Nylon6.284.102.88
LITZ-120X0.10-PU180-SN50–100 kHz3×40 × 0.10 mm (38 AWG)PU 180 + Single Nylon0.941.5219.20
LITZ-420X0.10-PU180-SB50–100 kHz7×60 × 0.10 mm (38 AWG)PU 180 + Self-Bonding3.302.855.52
LITZ-1050X0.10-PU180-ETFE85 kHz EV WPT5×5×42 × 0.10 mm (38 AWG)PU 180 + Extruded ETFE8.255.102.22
LITZ-2500X0.10-PEI200-PI20–85 kHz5×10×50 × 0.10 mm (38 AWG)PEI 200 + 2× Polyimide Tape19.637.650.94
100 kHz – 2 MHz Litz Builds (SiC/GaN LLC Transformers, Medical RF & Compacted Rectangular)
LITZ-180X0.071-PU180-SN100–350 kHz3×60 × 0.071 mm (41 AWG)PU 180 + Single Silk/Nylon0.711.3225.40
LITZ-600X0.071-PU180-ETFE100–350 kHz5×3×40 × 0.071 mm (41 AWG)PU 180 + 3 kV ETFE Jacket2.382.807.68
LITZ-1200X0.071-TYPE8-PI100–300 kHz1200 × 0.071 mm ProfiledPU 180 + Compacted PI Tape4.752.1 × 4.23.86
LITZ-300X0.050-PU180-SN350 kHz–1 MHz5×60 × 0.050 mm (44 AWG)PU 180 + Natural Silk0.591.2230.80
LITZ-1000X0.050-PU180-FEP350 kHz–1 MHz5×4×50 × 0.050 mm (44 AWG)PU 180 + Extruded FEP1.962.559.35
LITZ-450X0.030-PU180-SS1–5 MHz3×3×50 × 0.030 mm (48 AWG)PU 180 + Single Silk0.320.9457.20
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Any strand count (7 to 12,000+), pitch lay length, compacted rectangular dimension (H × W), or triple-insulated (TIW-Litz) jacket can be engineered to your switching frequency.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
DC resistance & broken-strand continuity verificationVerify total DC resistance matches 100 % active strand count after dip-solder or crimp terminationEvery spool
Enamel pinhole & high-voltage outer insulation proof testVerify Grade 1/2 strand enamel continuity and 1.5–10 kV AC dielectric withstand on taped/extruded Litz100 % of length
Sample tests
+380 °C dip-solderability & AC resistance ratio (R_AC / R_DC) auditConfirm clean solder wetting within ≤ 3 s (PU grades) and low high-frequency eddy lossProduction lot

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

IEC 60317-11 / -20 / -51 High-Frequency Litz Wire CompliantNEMA MW 1000 (MW 79-C / MW 80-C) Solderable Litz

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

Spool Label: TEBAOFLEX HF LITZ [STRANDS X DIA] [PU180/PEI200] [SERVING/JACKET]
Delivery form
DIN cylindrical winding spools (DIN 80 to DIN 500) or pre-cut dip-soldered coil leads
Custom engineering
Free strand-diameter vs switching-frequency & proximity-loss calculation support
Lead time
2–3 weeks ex-works

Technical documents

Downloads

PDFHF Litz Wire Multi-Strand Enamelled High-Frequency Litz Winding – technical datasheet12 sizes · construction, technical data, approvalsXLSXHF Litz Wire spec data (Excel)All 12 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

How do I choose the correct individual strand diameter for my converter's switching frequency?
In copper at +100 °C, the AC skin depth is approximately δ ≈ 75 / √f (in mm, with f in Hz). To prevent skin-effect and proximity-effect eddy currents inside each strand, the individual strand diameter d_s should be ≤ 1.0 × δ (and ≤ 0.5 × δ in multi-layer windings with strong gap fringing flux): use Ø 0.20 mm (32 AWG) for 10–50 kHz, Ø 0.10 mm (38 AWG) for 50–100 kHz, Ø 0.071 mm (41 AWG) for 100–350 kHz, and Ø 0.050 mm (44 AWG) for 350 kHz–1 MHz.
Why must high-strand-count Litz wire (> 150 strands) use multi-stage Type 2 planetary cabling instead of a simple single bunch?
In a simple single-twist bunch (Type 1) with hundreds of strands, the strands in the centre stay in the centre along the entire wire length and enclose a different magnetic flux than the outer strands, causing severe circulating currents between strands. A multi-stage Type 2 planetary construction (e.g. 5 × 5 × 40) ensures every single strand migrates periodically through every radial and azimuthal position in the cross-section.
How is solderable Polyurethane (PU Class 155/180) Litz wire terminated without mechanically stripping thousands of hair-thin strands?
Solderable Polyurethane (IEC 60317-20 / -51) decomposes cleanly into fluxing gases when immersed in a molten lead-free solder pot at +375 °C to +395 °C for 2–4 seconds, tinning all 1,000+ strands simultaneously into a solid, low-resistance termination.
When should I choose compacted rectangular Litz (Type 8) or extruded ETFE/FEP Litz?
Choose compacted rectangular Litz (Type 8) when transformer window area is tight—it boosts copper fill factor from ~45 % (round Litz) to 68–72 % while preserving transposition. Choose extruded ETFE/FEP or polyimide-taped Litz when you need 3 kV to 10 kV primary-to-secondary galvanic isolation without heavy bobbin margin tape.

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HF Litz Wire Multi-Strand Enamelled High-Frequency Litz Winding

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