MWS Wire /
Why use shaped magnet wire over round magnet wire?
Shaped magnet wire lends itself to specific applications where the precise geometry of the coil is critical to its function. In addition to round magnet wire, MWS can produce rectangular magnet wire and as well as square and Microsquare Magnet Wire®.
Rectangular Magnet Wire
MWS Wire Industries is a custom producer of film insulated rectangular magnet wire. MWS has the capability to produce larger transformer wires in sizes up to .400″ in width down to the smaller insulated ribbon with a thickness starting around .001″ and typically found in pancake coils. With a variety of enamels to choose from and low quantity minimums, MWS can meet your custom insulated ribbon wire needs.
Square Magnet Wire
Square magnet wire is useful where space constraints are concerned. When formed into a coil an equivalent amount of square wire put in a coil can be placed in a tighter coil configuration than the same amount of round wire. This enables engineers to create compact coils and small motors that deliver more power in less space.
Shaped Magnet Wire Calculator
General and Rectangular Conversion
Results
Round Eq.
inches
Ampacity
amps
Copper
Resistance
Ω/ft
Resistance
Ω/kft
Aluminium
Resistance
Ω/ft
Resistance
Ω/kft
- The tool provides data for Single, Heavy, Triple, and Quad insulation builds per NEMA MW 1000-2015.
- Values not covered under NEMA 1000-2015 have been derived from MWS Wire Internal Standards.
- Diameters shown do not include those for Quad Build NEMA MW 1000-2015 MW16C.
Shaped Wire
Technical Data
Need more info about Shaped Magnet Wire up to 14 AWG? See the Data Sheet in our Tech Book.
If you do not see exactly what you are looking for, please contact us.
Square Magnet Wire
15 AWG and Finer
For information and technical data on Microsquare Magnet Wire®
Product Spotlight
High Dielectric Constant
FORMVAR (F)
NEMA STANDARD (NW1000): MW18
IEC STANDARD (60317): 60317-17
FEDERAL SPEC.: JW1177/16
An early synthetic insulation composed of modified polyvinyl resins designed for continuous operation at 105C
• Excellent abrasion resistance
• Compatible with most varnishes and impregnating compounds
Applications: Oil filled transformers, motors, solenoids, superconducting coils or other cryogenic applications
Polyesters Non Solderable
Polyesteramideimide-200 (APT)
NEMA STANDARD (NW1000): MW36
IEC STANDARD (60317): 60317-29
FEDERAL SPECIFICATION: JW 1177/13
A dual coat system composed of THEIC modified polyester, combined with a corona resistant shield coat of polyamideimide (A/I) overcoat designed to withstand severe voltage stresses.
Applications: High voltage motors and high temperature applications
High Temperature
Polyimide - ML* (ML)
NEMA STANDARD (NW1000): MW20
IEC STANDARD (60317): 60317-47
FEDERAL SPECIFICATION: JW 1177/ 18
Film composed of aromatic polyimide resin with high cut through, exceptional chemical resistance, and minimal outgassing
• capable of continuous operation at 240°C
• Operation in extremely harsh environments with high and low temperatures
Applications: Cryogenics, high temperature continuous duty coils, hermetically sealed relays, fractional and integral HP motors
* Registered trademark of Industrial Summit Technology
Insulated Large Square Magnet Wire - Copper
| Bare Copper | Heavy Build | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size (AWG) | Dimensions (inches) | Resistance* (ohms per 1000 ft. at 20° C) | Square Mils | Corner Radius | Pounds Per | Dimensions (inches) | ||||||
| MIN | NOM | MAX | MIN | NOM | MAX | NOM | NOM | 1000FT | MIN INCREASE | MIN O.D. | MAX O.D. | |
| 1 | .2864 | .2893 | .2922 | .09627 | .09895 | .1020 | 82,320 | .039 | 317.2 | .003 | .2894 | .2972 |
| 2 | .2550 | .2576 | .2602 | .1217 | .1253 | .1295 | 64,980 | .039 | 250.4 | .003 | .2580 | .2652 |
| 3 | .2271 | .2294 | .2317 | .1539 | .1589 | .1648 | 51,250 | .039 | 197.5 | .003 | .2301 | .2367 |
| 4 | .2023 | .2043 | .2063 | .1949 | .2018 | .2100 | 40,370 | .039 | 155.6 | .003 | .2053 | .2113 |
| 5 | .1801 | .1819 | .1837 | .2470 | .2568 | .2689 | 31,710 | .039 | 122.2 | .003 | .1831 | .1887 |
| 6 | .1604 | .1620 | .1636 | .3101 | .3211 | .3345 | 25,360 | .031 | 97.75 | .003 | .1634 | .1686 |
| 7 | .1429 | .1443 | .1457 | .3929 | .4084 | .4277 | 19,940 | .031 | 76.86 | .003 | .1459 | .1507 |
| 8 | .1272 | .1285 | .1298 | .4981 | .5210 | .5501 | 15,630 | .031 | 60.25 | .003 | .1302 | .1348 |
| 9 | .1133 | .1144 | .1155 | .6267 | .6513 | .6812 | 12,510 | .026 | 48.20 | .003 | .1163 | .1205 |
| 10 | .1009 | .1019 | .1029 | .7951 | .8309 | .8757 | 9,803 | .026 | 37.78 | .003 | .1039 | .1079 |
| 11 | .0897 | .0907 | .0917 | .9914 | 1.033 | 1.085 | 7,883 | .020 | 30.38 | .003 | .0927 | .0967 |
| 12 | .0798 | .0808 | .0818 | 1.254 | 1.317 | 1.397 | 6,185 | .020 | 23.84 | .003 | .0828 | .0868 |
| 13 | .0710 | .0720 | .0730 | 1.565 | 1.641 | 1.734 | 4,964 | .016 | 19.13 | .003 | .0740 | .0780 |
| 14 | .0631 | .0641 | .0651 | 1.980 | 2.094 | 2.239 | 3,889 | .016 | 14.99 | .003 | .0661 | .0701 |
* Based on 100% conductivity IACS
Insulated Large Square Magnet Wire - Aluminum
| Bare Aluminum | Heavy Build | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size (AWG) | Dimensions (inches) | Resistance* (ohms per 1000 ft. at 20° C) | Square Mils | Corner Radius | Pounds Per | Dimensions (inches) | ||||||
| MIN | NOM | MAX | MIN | NOM | MAX | NOM | NOM | 1000FT | MIN INCREASE | MIN O.D. | MAX O.D. | |
| 1 | .2864 | .2893 | .2922 | .1558 | .1601 | .1650 | 8,2320 | .040 | 96.46 | .003 | .2894 | .2972 |
| 2 | .2550 | .2576 | .2602 | .1969 | .2028 | .2096 | 64,980 | .040 | 76.15 | .003 | .2580 | .2652 |
| 3 | .2271 | .2294 | .2317 | .2491 | .2572 | .2666 | 51,250 | .040 | 60.06 | .003 | .2301 | .2367 |
| 4 | .2023 | .2043 | .2063 | .3154 | .3265 | .3399 | 40,370 | .040 | 47.30 | .003 | .2053 | .2113 |
| 5 | .1801 | .1819 | .1837 | 3997 | .4156 | .4351 | 31,710 | .040 | 37.16 | .003 | .1831 | .1887 |
| 6 | .1604 | .1620 | .1636 | .5017 | .5196 | .5412 | 25,360 | .032 | 29.72 | .003 | .1634 | .1686 |
| 7 | .1429 | .1443 | .1457 | .6357 | .6609 | .6920 | 19,940 | .032 | 23.37 | .003 | .1459 | .1507 |
| 8 | .1272 | .1285 | .1298 | .8059 | .8431 | .8902 | 15,630 | .040 | 18.32 | .003 | .1302 | .1348 |
| 9 | .1133 | .1144 | .1155 | 1.014 | 1.054 | 1.102 | 12,510 | .026 | 14.66 | .003 | .1163 | .1205 |
| 10 | .1009 | .1019 | .1029 | 1.286 | 1.344 | 1.417 | 9,803 | .026 | 11.49 | .003 | .1039 | .1079 |
| 11 | .0897 | .0907 | .0917 | 1.604 | 1.672 | 1.755 | 7,883 | .020 | 9.237 | .003 | .0927 | .0967 |
| 12 | .0798 | .0808 | .0818 | 2.028 | 2.131 | 2.260 | 6,185 | .020 | 7.248 | .003 | .0828 | .0868 |
| 13 | .0710 | .0720 | .0730 | 2.532 | 2.655 | 2.806 | 4,964 | .016 | 5.817 | .003 | .0740 | .0780 |
| 14 | .0631 | .0641 | .0651 | 3.203 | 3.389 | 3.623 | 3,889 | .016 | 4.557 | .003 | .0661 | .0701 |
* Based on 61.8% conductivity IACS
Special Processes
Our magnet wire can be customized to your exact need
- Ablated
- Annealed
- Bondable
- Cut to length
- Custom shapes
- Spooling
Ablated | Annealed | Bondable | Cut to length | Custom shapes | Spooling
Ask a sales representative about any special temper or wire finish.
Looking for something specific?
We probably have it in stock. If we don't, we can make it faster than you'd think!
Why Choose MWS?
Quick and Right Answers.
We invest heavily in our customer service and engineering team so that we can give you the right answers and the most effective customized solutions. Our success, as well as our very purpose, is directly linked to the long-term satisfaction of our customers using our wire products.
Unrivaled Availability, Low Minimum Order Quantity, and Quick Delivery.
MWS has one of the largest inventories of stainless-steel wire and other wire products. We provide wire from 1/4lb to 50lb spools. Ninety percent of our stock orders go out within a week. Short production runs and quick turnarounds are our specialty.
Pre-cut Wire Lengths and Other Custom Orders.
We can provide straight wire cuts from one inch to 6-foot lengths holding the tolerances you require for your specific application. Need shaped wire? We have a variety of special shapes including square wire, flat wire, and ribbon wire. Special coatings and finishes are available as well.
Headache Free Compliance Documentation.
Let us help you satisfy your customer's needs for clear and comprehensive compliance documentation including RoHS, REACH, DFARS, MADE IN USA, USMCA, etc. Chemical and physical testing reports are also available upon request.
Let Us Manage Your Inventory for You.
With 40,000 sq. ft. of warehouse space and thousands of products in stock, inventory management is our specialty. It doesn't have to be yours. Whether it's same day shipment from inventory or producing a wire to meet just-in-time schedules, we can get what you need when you need it. Ask about scheduled shipments synchronized to work with your inventory control, JIT, or Kanban system.
