This European Standard specifies the three-poles temperature compensated arc fault circuit breakers
without signal contacts, rated from 3 A to 25 A and used in aircraft on-board circuits. In any operating state
a "trip-free" tripping is ensured. These Items are designed to protect aircraft wiring system from circuit
overload and arc faults. It describes specific environmental, electrical and mechanical characteristics and
the stringency of tests to be applied according to test methods of EN 3841-100.
If the design of the arc fault circuit breakers contains software or complex hardware, as a minimum, the
software and hardware shall be developed in accordance with RTCA DO-178B or C, DAL C and
RTCA DO-254, DAL C, respectively.
These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.