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Spool of thin copper wire with reddish enamel coating

Unique-Bargains

Unique-Bargains Enameled Copper Wire 0.25mm 49ft 130°C

SKU CH-97X4-BFXZ3

Enameled copper wire for winding coils, 0.25 mm diameter with 130 °C temperature rating, 49 ft length

  • TypeCopper Building Wire
  • Precise 0.25 mm diameter suits tight windings
  • 49 ft length covers multiple coil projects
  • 130 °C rating handles demanding thermal loads
  • Polyester with polyamide overcoat prevents short circuits
  • NEMA-drawn copper ensures consistent electrical performance

Hobbyist winding wire

This 0.25 mm enameled copper wire suits hobbyists, students and small-shop technicians who wind their own coils, transformers or motor windings. The polyester insulation with polyamide overcoat prevents turn-to-turn shorts while remaining thin enough for tight windings. A 49 ft spool provides enough length for multiple experimental or repair jobs.

130 °C thermal headroom

The wire is rated for continuous operation at 130 °C, giving ample margin for typical low-voltage winding tasks that run well below that temperature. The 0.25 mm conductor diameter limits current-carrying capacity, so the wire reaches its thermal limit quickly in high-current or high-duty-cycle applications.

Solderable insulation frees flux time

The modified polyester insulation can be soldered through with a hot iron, removing the need for mechanical stripping and speeding up prototype assembly. The fine 0.25 mm diameter demands a steady hand and fine-tip iron; builders needing heavier gauge or higher current capacity will find this spool insufficient.

Highlights

  • Precise 0.25 mm diameter suits tight windings
  • 49 ft length covers multiple coil projects
  • 130 °C rating handles demanding thermal loads
  • Polyester with polyamide overcoat prevents short circuits
  • NEMA-drawn copper ensures consistent electrical performance

Specifications

BrandUnique Bargains
TypeCopper Building Wire

Questions about this item

Can I wind this 0.25 mm enameled copper wire onto an existing coil form without the insulation cracking?

The wire uses a modified polyester insulation with a polyamide overcoat rated to 130 °C, so it withstands normal winding tension and operating heat on legacy forms.

How do I verify the 0.25 mm diameter and insulation integrity after I have spooled it onto my project?

Measure the outer diameter with a micrometer; it should read 0.25 mm ± 0.03 mm, and a continuity test between adjacent turns will confirm the enamel has not shorted.

Does the 49 ft spool include any terminals, solderable leads or a spool holder, or must I source those separately?

The package contains only the 15 m length of enameled copper wire; connectors, terminals and a dispensing stand are not included and must be purchased separately.

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