Circuit breakers and fuses

The copper nickel chemistry of our Cuprothal® product line is ideal for fuse and circuit breaker applications. Materials come in a range of resistivities to allow adjustment of circuit interruption at the load you require.

Recommended alloys
Kanthal®
CuNi alloys		 Max. continuous operating temp.
ºC (ºF)		 Resistivity at 20ºC (68ºF)
Ω mm2/m (Ω/cmf)
   
Cuprothal® 294 (aka Cuprothal® 49) wire 600 (1110) 0.49 (295)
Cuprothal® 180 (aka Cuprothal® 30) wire 400 (750) 0.30 (180)
Cuprothal® 90 (aka Cuprothal® 15) wire 400 (750) 0.15 (90)
Cuprothal® 60 (aka Cuprothal® 10) wire 300 (570) 0.10 (60)
Cuprothal® 30 (aka Cuprothal® 5) wire 300 (570) 0.05 (30)

See also our complete list of alloys to compare different types of materials.

Connected products

Here you can find the Kanthal product offering

Wire

Wire

Kanthal provides resistance heating and conductive wires in FeCrAl, NiCr, NiFe, and CuNi alloys, designed for high-temperature and resistance applications. Available as round, flat (ribbon), and shaped wire, with various coatings and surface finishes, Kanthal wire ensures durability, efficiency, and long-term performance across industries.

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