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Homepage>BS Standards>49 AIRCRAFT AND SPACE VEHICLE ENGINEERING>49.060 Aerospace electric equipment and systems>21/30439940 DC BS EN 3774-004. Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A Part 004. UNC thread terminals. Product standard
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21/30439940 DC BS EN 3774-004. Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A Part 004. UNC thread terminals. Product standard

21/30439940 DC

BS EN 3774-004. Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A Part 004. UNC thread terminals. Product standard

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Standard number:21/30439940 DC
Pages:14
Released:2021-07-21
Status:Draft for Comment
DESCRIPTION

21/30439940 DC


This standard 21/30439940 DC BS EN 3774-004. Aerospace series. Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A is classified in these ICS categories:
  • 49.060 Aerospace electric equipment and systems

This document specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits at a temperature between −55 °C and 125 °C for ratings ≤ 15 A and −55 °C to 90 °C for ratings > 15 A and at an altitude of 22 000 m max.

These circuit breakers are operated by a push-pull type single pushbutton (actuator), with delayed action “trip-free” tripping.

They will continue to function up to the short-circuit current.


This product includes: