Litz Wire
Connection Technologies for Litz Wires
Due to the many stranded nature of litz wires, terminating them often poses a challenge. The following table advises the connection technologies which are generally applicable for various insulations. Only the most important factors of influence have been classified. Many others, such as enamel type and insulation thickness of the single strands, heat resistance of the additional insulation, the stranding construction (tight/compact or wide/flexible), have not been addressed.
| Litz wires without additional insulation | Litz wires with additional insulation | ||||||
|---|---|---|---|---|---|---|---|
| overall diameter < 1.0 mm | overall diameter ≥ 1.0 mm | Serving | Extrusion | Taping | |||
| Connection technology | many fine single strands* | few heavy strands** | many fine single strands* | few heavy strands** | |||
| Soldering | dip/flow/hand/wave soldering | dip/flow/hand/wave soldering | dip/flow soldering | dip/flow soldering | dip/flow soldering | dip/flow soldering | dip/flow soldering |
| Mechanical skinning | -- | brushing | -- | brushing | taking off serving, brushing if necessary | stripping off coating, brushing if necessary | off/opening the tape, brushing if necessary |
| Crimping (pre-stripped) | possible | possible | possible | possible | possible | possible | possible |
| - welding - thermocompression - resistance - ultrasonic sound |
thermo-compression, ultrasonic sound | thermo-compression, ultrasonic sound, resistance | thermo-compression | thermo-compression, ultrasonic sound, resistance | Thermocompression (nylon) | thermocompression | mechanical removal of additional insulation recommended |
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* nom. diameter ≤ 0,100 mm
** nom. diameter > 0,100 mm
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