DS EN 2794-004:1999 Aerospace Series - Circuit Breakers, Single-Pole, Temperature Compensated, Rated Currents 20 A To 50 A - Part 004: Unc Thread Terminals - Product Standard Provides the required characteristics for single-pole, temperature compensated circuit breakers rated currents from 20 A to 50 A, UNC thread terminals, for use in aircraft electrical systems, at tempe