Heavy armored polythermaleze round magnet wire on spool showing copper winding

Single 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 coilsSolenoids

Products

Item # AWG Size Nom. Bare Wire Diameter Min. Increase in Diameter Due to Film Coating Max. Overall Diameter of Film-Coated Wire
MWRD17SF 17 0.0453 in 0.0014 in 0.0475 in
MWRD195SF 19-1/2 0.0339 in 0.0012 in 0.0358 in
MWRD21SF 21 0.0285 in 0.0011 in 0.0303 in
MWRD23SF 23 0.0226 in 0.0010 in 0.0243 in
MWRD25SF 25 0.0179 in 0.0009 in 0.0194 in
MWRD26SF 26 0.0159 in 0.0009 in 0.0173 in
MWRD31SF 31 0.0089 in 0.0006 in 0.0100 in
MWRD32SF 32 0.0080 in 0.0006 in 0.0091 in
MWRD33SF 33 0.0071 in 0.0005 in 0.0081 in
MWRD34SF 34 0.0063 in 0.0005 in 0.0072 in
MWRD38SF 38 0.004 in 0.0003 in 0.0047 in
MWRD39SF 39 0.0035 in 0.0003 in 0.0041 in
MWRD40SF 40 0.0031 in 0.0003 in 0.0037 in
MWRD41SF 41 0.0028 in 0.0002 in 0.0033 in
MWRD42SF 42 0.0025 in 0.0002 in 0.0030 in
MWRD44SF 44 0.002 in 0.0002 in 0.0024 in
MWRD45SF 45 0.00176 in 0.0002 in 0.00220 in
MWRD46SF 46 0.00157 in 0.0002 in 0.00200 in
MWRD50SF 50 0.00099 in 0.0001 in 0.00120 in

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