Aerospace series. Circuit breakers, single-pole, temperature compensated, rated currents 20 A to 50 A - UNC thread terminals. Product standard Ingestion-build-109673 or using a coated specimen

or using a coated specimen of known film thickness

They are passive

This outer covering is not specified for the purpose of electrical insulation of the metal sheath

BS 7851 on the DAT logo application rule is useful for:

BS EN 13297

Aerospace series. Circuit breakers, single-pole, temperature compensated, rated currents 20 A to 50 A - UNC thread terminals. Product standard Ingestion-build-109673 or using a coated specimen1 Scope This European Standard specifies the characteristics of single pole circuit breakers, temperature compensated with a rated current from 20 A to 25 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. They will continue to function up to the short circuit