Donau Elektronik koperlakdraad 0,10 mm diameter 100 m spoel (LD10-2)

Winding your own inductors, transformers or motor coils? This 100-metre spool of enamelled copper wire from Donau Elektronik gives you a solid foundation for custom electromagnetic components. The wire has a nominal outer diameter of 0.10 mm including its single-layer enamel insulation, which corresponds to a bare conductor diameter of about 0.08 mm. It is made from electrolytic copper and rated for continuous operation up to 155°C (thermal class F). The enamel insulation is transparent to brownish in colour and is solderable, so you can terminate connections without stripping. The wire is supplied on a spool, ready to feed into your winding jig or by hand.

Key specifications

• Nominal outer diameter (incl. insulation): 0.10 mm
• Approximate conductor diameter (bare): 0.08 mm
• Length: 100 m
• Conductor material: electrolytic copper
• Insulation: single-layer enamel, transparent/brownish
• Thermal class: F (155°C)
• Resistance at 20°C: 3.34 Ω/m
• Solid core, single strand
• Solderable insulation
• Supplied on spool

Why choose it

The 0.10 mm diameter is a practical size for fine windings where space is limited but you still need a manageable wire to handle. The enamel insulation is thin yet robust, and its solderability speeds up prototyping and production. With 100 metres on the spool, you have enough for multiple coils or small batch runs.

Ideal use cases

• Winding small transformers and chokes
• Repairing or building electric motors and generators
• Making inductors for RF circuits or filters
• Constructing relays, solenoids and electromagnets
• Educational projects and hobbyist electronics

Good to know

The wire complies with IEC 60317, the general standard for enamelled round copper winding wires. The insulation is designed to withstand the thermal stresses of normal operation up to 155°C. Because the enamel is transparent to brownish, the copper colour may show through slightly, which is normal for this type of wire.