FEP 67% overlapping – Litz Wire

#Notice!
For your reference, sPEN(Polyethylene Naphthalat) tape is available instead of below FEP tape.
– Features : transparent, 5kv BDV, 180deg.(H class), flame retardant(UL 510), fusible etc.

litz wire structure with FEP overlapping

FEP litz wire

Inspection Certificate

Inspection date : –
Inspector : YDK QC
Judgement : Passed
Inspection Item : 0.10mm x 210 strands, 1 layer x FEP tape(25μm tape thick + 5μm adhesive), 67% overlapping, F Class. 155℃ MW-79C, Solderability (at 420~440℃), HF Litz Wire

Cu & Litz Wire Inspection DATA
– Diameter of Conductor (bare copper), (0.10 ±0.003mm) : 0.100, 0.100, 0.100, 0.100, 0.100mm
– Diameter of enamel coating Conductor (0.114~0.121mm) : 0.115, 0.115, 0.116, 0.116, 0.116mm
– LITZ OD : 1.72, 1.60, 1.68, 1.65, 1.66mm
– Total OD (1.95~2.25mm) : : 2.04, 1.99, 2.12, 1.98, 2.03mm

Important Matters
– Lay direction : Conductor(‘S’ direction) / FEP tape(‘Z’ direction)
– Breakdown Voltage : more than 1.5kV
– FEP tape thickness : 0.032, 0.030, 0.033, 0.034, 0.032mm
– FEP tape overlapping(%) : 6.9mm overlapping in 10mm width ( approx. 67% overlapping )

FEP film description : Polyimide film is a good H grade insulating material. It is widely used for insulation purpose in electrical appliances which are used in special environment. TO use the polyimide film means reducing volume and weight of the electrical appliances while retaining the same output or increase the capacity without increasing in frame size. It can also prolong the service life of the electrical appliances and increase their reliability.

FEP tape’s Features
– High temperature resistance ( permanent working temperature over 180℃ )
– Excellent dielectric withstanding
– Good mechanism property
– Chemical resist
– Flame retardant
– UL approved
– RoHS/REACH compliant

– Thickness : 1mil, 0.025mm
– Tensile strength, min : MD 10kg/in, 160MPa // TD 8.5kg/in, 135MPa
– Elongation, %, min : 50
– Dielectric strength, min : 4.5kv, 180MV/m
– Shrinkage at 400 , MD and TD, %, max : 3
– Volume resistance at 200+/-5℃, Ohm.m, min : 10 x to the power of ten
– Surface resistance at 200+/-5℃, Ohm.m, min : 10 x to the power of thirteen
– Dielectric constant, 48~62Hz : 3.5+/-0.4
– Dissipation factor, 48~62Hz, max : 0.004
( # The features are tested under room temperature(23℃) unless described. )