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.

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.

Our products for Circuit breakers and fuses