Lays down the required characteristics for single-pole temperature compensated circuit breakers of current ratings from (0.5 to 25)A. Operated by a single push-pull button with trip-free release, delayed tripping and are explosion proof. Their operation is ensured up to short circuit current. Temperature range lies between -55 Degrees C and 125 Degrees C, at an altitude Z = 22000m max. Used in conjunction with EN 2350.