Features of NA Ribbon Wires Excellent Insulation NA ribbon wire has a uniform insulating film even at the corners of the conductor, which could not be achieved by the conventional dip-coat method, providing excellent insulation, and thus high dielectric strength. Various Insulating Films Available NA ribbon wire is available with as many as seven types of paint from UE (120 class) to AI (200 class), enabling you to choose the best insulation film for your requirements. We have commercialized polyamide-imide, with which the corners of the conductor could not be covered by the conventional method. Wide Range of Size Options NA ribbon wire can have an insulating film formed at the corners of the conductor, irrespective of the conductor's size and thickness-to-width ratio. Therefore, it is available in a wide range of dimensions from extra thin (0.025mm in conductor thickness) to thick (0.30mm in conductor thickness). (Consult us if you need a wire with a thickness-to-width ratio exceeding 1:20, which we can provide.) Available for Various Winding Coils NA ribbon wire is available in a wide variety of insulating film thicknesses, making it ideal for producing flatwise- and - winding coils. Due to the flexibility of its film, the NA ribbon wire can also be used successfully for demanding types of winding, such as edgewise winding. Use with Various Bonding Films TOTOKU offers various kinds of bonding film so you can choose the most appropriate one for your needs. Excellent Cost Performance The manufacturing method of NA ribbon wire features TOTOKU's original varnishing and baking technology to achieve lower costs than any of the company's conventional methods. Cross Section of NA Ribbon Wire * The finished dimensions measured with a micrometer. Available Specifications of NA Ribbon Wires Diameter of equivalent round conductor(mm) 0.090 - 0.650 Conductor thickness(mm) Standard 0.030 - 0.300 Special Min0.025 Thickness-to-width ratio Standard 1 : 3 - 1 : 20 Special 1 : 35 Minimum thickness of insulating film(mm) Standard 0.0030 Special 0.0015 Insulating film UE, SF.B, SF.FL, PE, SF.EI, EI, AI Bonding film Same as round wires * Consult us for details of special specifications. Comparative Characteristics of NA Ribbon Wires *The metal cylinder method was used for testing dielectric breakdown voltage . Comparison of Characteristics by Manufacturing Method of Ribbon Wires Manufacturing method NA Ribbon Wire (-NAR) Special Type(-RB) Normal Type(-R) Baked wire rolled Bare wire rolled Thickness-to-width ratio 1:20 or more × up to 1:15 1:20 or more Uniformity of film × (Films cannot be formed at corners) Range of insulating films available × Dielectric strength × (Films cannot be formed at corners) Softness of wire × Applications Product Code Description Noise filters High-class speaker voice coils Small-sized transformers Small-sized sensor coils, solenoids, etc. Other coils, transfers and motors (Available for edgewise winding and -winding coils) Available Sizes of NA Ribbon Wires * Consult us if you need the special range of specifications or thickness-to-width ratios outside the standard range between 1:3 and 1:20. * NA ribbon wire is available as Cu wire and CCAW (Copper-Clad Aluminum Wire).