Served Litz Wire
General
High frequency litz wire served with natural silk, polyester, or nylon is characterized by increased dimensional stability and mechanical protection. The optimized serving tension ensures high flexibility and splicing- or spring up prevention during the process of cutting the litz wire. This splicing effect can cause handing and contacting of the wire ends more difficult in post processing.
Features and benefits of served litz wires
- Additional protection against mechanical stress
- Excellent dimensional and physical stability
- High flexibility
- Splicing prevention
- Good solderability above temperatures of 410 °C
- Improved impregnation
- Optimization of winding capacity
- Serving material allows optimization of insulation distances
Technical properties of served litz wires
Technical values of serving material
| Serving materials1) | Silk | Nylon | Polyester* | |
|---|---|---|---|---|
| Thermal properties | ||||
| Recommended permanent use temperature | 110 | 120 | 120 | °C |
| Melting temperature | - | 250 - 260 | 250 - 260 | °C |
| Elektrical properties | ||||
| Dielektric constant ℇr | 1.4 | 3.4 | 3.2 | |
| Mechanical properties | ||||
| Elongation at break (dry) | 13 - 25 | 25 - 46 | 20 | % |
| Moisture absorption (65% rel. humidity, 21°C) | 9 | 2.5 - 4 | 0.2 - 0.5 | % |
| Other | ||||
| Color | white, green | white | white | |
Dimensions
| Serving materials1) | Silk | Nylon | Polyester* | |
|---|---|---|---|---|
| Diameter of single wires2) | 0.020 - 0.300 | 0.020 - 0.300 | 0.020 - 0.300 | mm |
| Number of single wires3) | 2 - 25,000 | 2 - 25,000 | 2 - 25,000 | pcs |
| outer diameter of litz wires | 0.071 - 4.0 | 0.071 - 10.0 | 0.071 - 4.0 | mm |
| Number of layers (typ.) | 1 - 2 | 1 - 2 | 1 - 2 |
* Available in Asia only
1) customized solution on demand (thermo adhesive yarns)
2) other diameters on demand
3) depending on number of single wires
Applications
- HF transformers
- HF in-/converters
- HF transceivers
- HF chokes
- Inductive charger