Features : .Useful in a wide variety of power conversion and line filter applications . .Cost effective design. .Low volume hand wound to high volume automatic machine wound. .130℃ or 155℃ UEW-NY wire. .High saturation current. .Customer's specifications are welcome. Inductance and suggested frequency ranges : .Inductance range : 0.1uH to 10000uH . .Suggested frequency : "26": 50Hz ~ 100 KHz. "52": 50Hz ~ 200KHz. "18"/"53" : 50KHz ~ 700KHz. "8/90": 100KHz ~ 2 MHz.