Description
xWhat Is Magnet Wire?
Magnet wire — also known as enameled copper wire, enamel-coated copper wire, or winding wire — is a solid copper conductor covered with a very thin, tough layer of polymer insulation. Unlike ordinary insulated copper wire with its thick plastic jacket, magnet wire relies on a micrometer-thin enamel film that lets thousands of turns sit tightly side by side in a coil without short-circuiting. It is the fundamental conductor inside every device that converts electrical energy into a magnetic field.
Raw copper is drawn through precision dies to reach the exact AWG size required for each application, then annealed to restore ductility before the enamel is applied and cured. The result is a flexible, high-conductivity copper magnet wire that can be wound into dense, compact coils for transformers, motors, solenoids, instruments, and a wide range of electromagnetic devices.
Polyurethane Insulation — 155°C Rated
The insulation on this enameled copper wire is made from modified polyurethane, a solderable enamel that delivers reliable dielectric performance at a continuous operating temperature of 155°C (311°F). Polyurethane magnet wire can be soldered directly without prior stripping — the film dissolves cleanly into molten solder — making it a preferred choice for fast, efficient coil termination. The enamel coating protects adjacent turns from short-circuiting while adding almost no bulk, maximizing the copper fill factor in every winding.
Manufactured to NEMA Magnet Wire Standards
Every spool of this enameled copper wire is produced to meet the dimensional and performance requirements set by the National Electrical Manufacturers Association (NEMA) for magnet wire. NEMA standards cover conductor resistance, insulation build, dielectric strength, and thermal endurance, ensuring consistent, predictable performance across production runs. Whether you are winding a small relay coil or a large transformer, you can rely on uniform enamel coverage and dependable electrical insulation spool after spool.
Common Applications of Enameled Copper Wire
Because of its compact insulation and excellent electrical properties, this 155°C polyurethane magnet wire is widely used across industries for:
Transformers
Wound coils
Electric motors
Solenoids
Relays
Inductors
Instruments & meters
Generators
Speaker voice coils
Sensors & actuators
From fine-gauge coil winding wire for precision instruments to heavier gauges for motor and transformer windings, enameled copper wire remains the most widely used magnetic wire in electrical manufacturing — valued for its high conductivity, thermal stability, and space-saving enamel insulation.
Shipping & Return
xReturns Policy
You may return items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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