Heavy armored polythermaleze round magnet wire on spool showing copper winding

Heavy Formvar Round Magnet Wire

Magnet Wire

Formvar is a synthetic enamel composed of polyvinyl acetal and phenolic resins.Formvar's hot oil resistance sets it apart from all other magnet wire insulations. The flexibility, adhesion and abrasion scrape resistance of Formvar film is excellent. Its electrical properties are very good and it is resistant to common solvents. While Formvar has been replaced in many applications, Formvar continues to be the recommended film insulation most commonly used in oil-filled transformers.Typical ApplicationsOil-filled transformersMotorsRandom wound coilsSolenoidsGuitar Pickups For Use in Guitar Pickups Formvar serves as an excellent choice of winding wire for pickup manufacturing companies and is chosen for it's resistance to common solvents (including sweat and other liquids that can find its way into a guitar's pickup). Heavy Formvar is used where top end brightness and note definition are desired, due to fewer windings than with thinner wire with more windings.

Products

Item # AWG Size Nom. Bare Wire Diameter Min. Increase in Diameter Due to Film Coating Max. Overall Diameter of Film-Coated Wire
MWRD4HF 4 0.2043 in 0.0037 in 0.2098 in
MWRD6HF 6 0.1620 in 0.0035 in 0.1671 in
MWRD9HF 9 0.1144 in 0.0032 in 0.1189 in
MWRD11HF 11 0.0907 in 0.0030 in 0.0948 in
MWRD12HF 12 0.0808 in 0.0029 in 0.0847 in
MWRD13HF 13 0.0720 in 0.0028 in 0.0757 in
MWRD14HF 14 0.0641 in 0.0032 in 0.0682 in
MWRD15HF 15 0.0571 in 0.0030 in 0.0609 in
MWRD16HF 16 0.0508 in 0.0029 in 0.0545 in
MWRD17HF 17 0.0453 in 0.0028 in 0.0488 in
MWRD18HF 18 0.0403 in 0.0026 in 0.0437 in
MWRD19HF 19 0.0359 in 0.0025 in 0.0391 in
MWRD20HF 20 0.0320 in 0.0023 in 0.0351 in
MWRD21HF 21 0.0285 in 0.0022 in 0.0314 in
MWRD22HF 22 0.0253 in 0.0021 in 0.0281 in
MWRD23HF 23 0.0226 in 0.0020 in 0.0253 in
MWRD24HF 24 0.0201 in 0.0019 in 0.0227 in
MWRD25HF 25 0.0179 in 0.0018 in 0.0203 in
MWRD26HF 26 0.0159 in 0.0017 in 0.0182 in
MWRD27HF 27 0.0142 in 0.0016 in 0.0164 in
MWRD28HF 28 0.0126 in 0.0016 in 0.0147 in
MWRD29HF 29 0.0113 in 0.0015 in 0.0133 in
MWRD30HF 30 0.0100 in 0.0014 in 0.0119 in
MWRD31HF 31 0.0089 in 0.0013 in 0.0108 in
MWRD32HF 32 0.0080 in 0.0012 in 0.0098 in
MWRD33HF 33 0.0071 in 0.0011 in 0.0088 in
MWRD34HF 34 0.0063 in 0.0010 in 0.0078 in
MWRD35HF 35 0.0056 in 0.0009 in 0.0070 in
MWRD36HF 36 0.0050 in 0.0008 in 0.0063 in
MWRD37HF 37 0.0045 in 0.0008 in 0.0057 in
MWRD38HF 38 0.004 in 0.0007 in 0.0051 in
MWRD39HF 39 0.0035 in 0.0006 in 0.0045 in
MWRD40HF 40 0.0031 in 0.0006 in 0.0040 in
MWRD44HF 44 0.002 in 0.0004 in 0.0027 in
MWRD45HF 45 0.00176 in 0.0004 in 0.0024 in
MWRD46HF 46 0.00157 in 0.0003 in 0.0021 in
MWRD47HF 47 0.00140 in 0.0003 in 0.0019 in
MWRD48HF 48 0.00124 in 0.0002 in 0.00170 in
MWRD50HF 50 0.00099 in 0.0002 in 0.0014 in
MWRD42HF 42 0.0025 in 0.0004 in 0.0032 in
MWRD43HF 43 0.0022 in 0.0004 in 0.0029 in

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