This standard specifies the characteristics of single-pole circuit breakers, temperature compensated with a
rated current from 20 A to 50 A, used in aircraft on-board circuits at a temperature between - 55 °C and
125 °C and at an altitude of 15 000 m max.
These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action
"trip-free" tripping with a polarized signal contact which is open when main contacts are closed, and inversely.
They are connected on supply side by means of bus-bar. They will continue to function up to the short-circuit
current.