This standard specifies the three-pole temperature compensated circuit breakers with signal contacts, polarized or not, rated from 1 A to 25 A and used in aircraft on-board circuits. It describes specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841‑100.

These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282 (all categories).