EFOLIT® Taped High Frequency Litz Wires
General
The EFOLIT product family represents a triple insulated taped litz wire design with VDE-certification for reinforced insulation, which is necessary to certify products for high voltage applications. Litz wire diameters up to 5.0 mm with temperature class F/155°C and H/180°C cover a wide range of operating temperatures for various power applications.
According to specification:
DIN EN 60950, annex U
DIN EN 62368, annex J
DIN EN 61558, annex K
DIN EN 60601, annex L
DIN EN 62368, annex J
DIN EN 61558, annex K
DIN EN 60601, annex L
Features and benefits of EFOLIT® - litz wires
Constructions with self adhesive sPET, sPEN tape material allow very high break down voltages as well as high copper filling factor and flexibility. The requested long term high working voltage resistivity requires a very precise taping process assuring very small tolerances within one spool, one lot and different shipments. EFOLIT®-winding wires are optimized for high safety demands of coil constructions without or with reduced intermediate tape insulation, usually used for transformer designs aiming at simplified winding processes and reduction of dimension, weight and material.
Technical properties of EFOLIT® - litz wires
Operating range
Winding wires for reinforced insulation | |
---|---|
Max. rated and peak voltage | 1000 Vrms 1414 Vpeak |
Max. frequency | 500 kHz |
Temperature class | F / 155 °C H / 180 °C |
Technical data of taping material
Self-adhesive tape | sPET | sPEN |
---|---|---|
Description | Polyester | Polyethylene Naphtalate |
Permittivity (JIS C 2318) | 3.2 | 2.9 |
Tape - UL file no. | E 515235 | E 515235 |
Processing | Fusible | Fusible |
Product identification
Validated standards | Code | sPET | sPEN |
---|---|---|---|
IEC/DIN EN 61558, 60950, 62368, 60601 VDE-Reg. no. E078 (nom. test voltage: 6 kV) |
EFOLIT 11F | Class F with enamel type TI = 155°C / 311°F |
- |
EFOLIT 22H | - | Class H with enamel type TI = 180°C / 356°F |
|
IEC/DIN EN 60950, 62368 VDE-Reg. no. E450 (nom. test voltage: 3 kV) |
EFOLIT 13F * | Class F with enamel type TI = 155°C / 311°F |
- |
EFOLIT 24H * | - | Class H with enamel type TI = 180°C / 356°F |
TI = Temperature Index
* Also certified as basic insulation acc. IEC/DIN EN 61558, Annex K
Dimensional range
Diameter single conductor | 0.030 - 0.300 mm 48 - 28 AWG |
Total conductor cross section | 0.100 - 10.600 mm2 |
Outer diameter litz wire (approx.) | 0.500 - 5.000 mm 24 - 4 AWG |
Tape insulation (min.) | 3 layers |
Applications
- EV (Electric Vehicles)
- OBC (Onboard charger)
- DC/DC converter
- Wireless charging
- Charging piles
- SMPS (Switch Mode Power Supplies)
- HF transformers
- HF transducers
- HF chokes