2USTC-F 0.071mmx400 Nylon Serving Litz Wire Copper Stranded Wire For Transformer
"Serving" is an outer protective layer braided or wrapped over a wire or cable. Nylon is a common material for this due to its:
High Abrasion Resistance: Protects against physical wear.
Good Flexibility: Maintains cable bendability.
Decent Heat Resistance: Withstands soldering temperatures.
Smooth, Low-Friction Surface: Eases pulling through conduits or winding.
Moisture and Chemical Resistance: Provides environmental protection.
·IEC 60317-23
·NEMA MW 77-C
·customized according to customer requirements.
| ItemNo. | Outer diameter
of single wire mm |
Conductor diametermm | Overall dimension mm | ResistanceΩ /m | Breakdown voltageV | Pitch |
| Techrequirement | 0.077-0.084 | 0.071±0.003 | Max.2.18 | ≤0.01248 | ≥950 | 40±3 |
| Sample 1 | 0.079 | 0.068 | 1.75 | 0.01132 | 2600 | √ |
| Sample 2 | 0.080 | 0.070 | 1.86 | 0.01130 | 2500 | √ |
High-Frequency Transformers and Inductors (especially in demanding environments):
Switch-mode power supplies (e.g., for servers, telecom equipment).
Induction heating work coils, where the wire is exposed to physical abrasion and high temperatures from the heated workpiece.
RF transformers and baluns in communication equipment.
High-Q Inductors for Resonant Circuits:
Used in radio transmitters, amplifiers, and medical devices (like MRI gradient coils and diathermy machines). The nylon serving protects the fine litz strands during the winding process and in operation.
Wireless Power Transfer Coils:
For consumer electronics (Qi chargers) and higher-power industrial systems. The serving protects the wire from damage during assembly and use, especially in automotive or public installation environments.
Critical Aerospace and Defense Electronics:
Where high-frequency performance must be maintained under extreme vibration, abrasion, and environmental conditions. The nylon serving adds durability and strain relief.
Premium Loudspeaker Voice Coils (High-Frequency Drivers):
Some high-end tweeter designs use litz wire to reduce losses in the audio frequency range. A serving can protect the delicate wire during the coil-winding and loudspeaker assembly process.
5G base station power supply

EV Charging Stations

Industrial Motor

Maglev Trains

Medical Electronics

Wind Turbines

Founded in 2002, Ruiyuan has been in the manufacture of enamelled copper wire for 20 years.We combine the best manufacturing techniques and enamel materials to create a high-quality, best-in-class enameled wire. The enameled copper wire lies at the heart of technology we use every day – appliances, generators, transformers, turbines, coils and much more. Nowadays, Ruiyuan has the global footprint to support our partners in marketplace.
Our Team
Ruiyuan attracts many outstanding technical and management talents, and our founders have built the best team in the industry with our long-term vision. We respects the values of each employee and provides them with a platform to make Ruiyuan a great place to grow a career.














