First and foremost, it was safe and affordable.Even though it was slightly more expensive than the cheaper EC grade aluminum building wire, which was on the way out anyway,Copper Clad Aluminum Wire still offered considerable savings over expensive solid copper.

Second, it was nearly three times lighter than copper diameter per diameter, making hand-toting heavy coils less of a chore, and pulling wire at the job-site a breeze.  It was flexible, but yet sufficiently strong to pull through studs.

Copper clad aluminum wire is available in diameters from 0.025mm to 0.500mm (AWG 50 - 24) with all insulations and self-bonding enamel types. The percentage of copper available are 10% and 15%, where 10% copper cladding is recommended for diameters above 0.100mm (AWG 38) and 15% for diameters below. For applications which require higher tensile strength HTCCA is recommended. Bare wire is available upon request.

Features:

Low density allows coil weight reduction

Easy soldering due to copper cladding

Higher conductivity compared to aluminum

Applications:

Voice coils (e.g. in Headphone, Headset, ...)

VCM coils for HDD actuator

Optical pickup coils

Loudspeakers

Others