DIN EN 3661-005:2008-01

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 15000 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 will continue to function up to the short-circuit current.