Basic parameters, working principle and purpose:
The DDB-Atwo5A50 pull-out free tripping single-phase circuit breaker product works on the principle of bimetallic electric thermal tripping and has a temperature compensation structure, which can be used in a wide temperature range. The circuit breaker is used for overload or short circuit protection in aircraft AC/DC distribution systems.

Environmental adaptability:
- Surrounding medium temperature: (-55~70) ° C 
- Random vibration: frequency range (152000) Hz, functional test value W0=0.07 g2/Hz 
- Impact: 15g 
- Acceleration: Performance test value 10g; Structural strength test value 13.5g 
- Cannon vibration: broadband values (T1~T3) and narrowband values (P1~P4) are shown in the following table 

Electrical performance:
Extreme action current
- At 20 ° C, 70 ° C, and -55 ° C, the maximum holding current of the product is the rated current 
- At 20 ℃, the minimum tripping current of the product is 140% of the rated current 
- -At 55 ℃, the minimum tripping current of the product is 180% of the rated current 
Overload current and action time
- Under standard atmospheric pressure conditions, the overload current and action time of the product are specified in the following list 


- life 
When the rated current and power factor are cos φ>; Under the condition of 0.5, connect and disconnect 3000 working cycles
- Breaking ability 
DC 3000 A; Exchange 1500 A
External dimensions:

