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 Applications
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 Applications
- Oil-filled transformers
- Motors
- Random wound coils
- Solenoids
Item # |
AWG Size |
Nom. Bare Wire Diameter |
Min. Increase in Diameter Due to Film Coating |
Max. Overall Diameter of Film-Coated Wire |
---|---|---|---|---|
MWRD50SF | AWG Size N/A 50 | Nom. Bare Wire Diameter N/A 0.00099 in0.0251 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0001 in0.003 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.00120 in0.0305 mm |
MWRD41SF | AWG Size N/A 41 | Nom. Bare Wire Diameter N/A 0.0028 in0.071 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0002 in0.005 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0033 in0.084 mm |
MWRD42SF | AWG Size N/A 42 | Nom. Bare Wire Diameter N/A 0.0025 in0.064 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0002 in0.005 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0030 in0.076 mm |
MWRD44SF | AWG Size N/A 44 | Nom. Bare Wire Diameter N/A 0.002 in0.051 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0002 in0.005 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0024 in0.0610 mm |
MWRD45SF | AWG Size N/A 45 | Nom. Bare Wire Diameter N/A 0.00176 in0.0447 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0002 in0.005 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.00220 in0.0559 mm |
MWRD46SF | AWG Size N/A 46 | Nom. Bare Wire Diameter N/A 0.00157 in0.0399 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0002 in0.005 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.00200 in0.0508 mm |
MWRD38SF | AWG Size N/A 38 | Nom. Bare Wire Diameter N/A 0.004 in0.102 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0003 in0.008 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0047 in0.119 mm |
MWRD39SF | AWG Size N/A 39 | Nom. Bare Wire Diameter N/A 0.0035 in0.089 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0003 in0.008 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0041 in0.104 mm |
MWRD40SF | AWG Size N/A 40 | Nom. Bare Wire Diameter N/A 0.0031 in0.079 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0003 in0.008 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0037 in0.094 mm |
MWRD33SF | AWG Size N/A 33 | Nom. Bare Wire Diameter N/A 0.0071 in0.180 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0005 in0.013 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0081 in0.206 mm |
MWRD34SF | AWG Size N/A 34 | Nom. Bare Wire Diameter N/A 0.0063 in0.160 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0005 in0.013 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0072 in0.183 mm |
MWRD31SF | AWG Size N/A 31 | Nom. Bare Wire Diameter N/A 0.0089 in0.226 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0006 in0.015 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0100 in0.254 mm |
MWRD32SF | AWG Size N/A 32 | Nom. Bare Wire Diameter N/A 0.0080 in0.203 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0006 in0.015 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0091 in0.231 mm |
MWRD25SF | AWG Size N/A 25 | Nom. Bare Wire Diameter N/A 0.0179 in0.455 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0009 in0.023 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0194 in0.493 mm |
MWRD26SF | AWG Size N/A 26 | Nom. Bare Wire Diameter N/A 0.0159 in0.404 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0009 in0.023 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0173 in0.439 mm |
MWRD23SF | AWG Size N/A 23 | Nom. Bare Wire Diameter N/A 0.0226 in0.574 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0010 in0.025 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0243 in0.617 mm |
MWRD21SF | AWG Size N/A 21 | Nom. Bare Wire Diameter N/A 0.0285 in0.724 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0011 in0.028 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0303 in0.770 mm |
MWRD195SF | AWG Size N/A 19-1/2 | Nom. Bare Wire Diameter N/A 0.0339 in0.861 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0012 in0.030 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0358 in0.912 mm |
MWRD17SF | AWG Size N/A 17 | Nom. Bare Wire Diameter N/A 0.0453 in1.151 mm | Min. Increase in Diameter Due to Film Coating N/A 0.0014 in0.036 mm | Max. Overall Diameter of Film-Coated Wire N/A 0.0475 in1.207 mm |