Compared with the traditional circuit breaker, abb miniature circuit breaker is an electrical component without mechanical movement and moving parts, but it also has the basic functions of the traditional circuit breaker. Solid state circuit breaker is a contactless switching element composed of all solid-state electronic components. It uses the point, magnetic and optical characteristics of electronic components to complete the reliable isolation of input and output, and uses the switching characteristics of high-power triode, power field effect transistor, single thyristor and bidirectional thyristor to connect and disconnect the controlled circuit without contact and spark

为什么选用固态断路器

Why solid state circuit breaker

（1）寿命长，性能稳定:固态断路器由于没有机械零部件，有固体器件完成触点功能，由于没有运动的零部件，因此能在高冲击，振动的环境下工作，由于组成固态断路器的元器件的固有特性，决定了固态断路器的寿命长，可靠性高。

(1) Long service life and stable performance: the solid-state circuit breaker has no mechanical parts and solid devices to complete the contact function. Because there are no moving parts, it can work in the environment of high impact and vibration. Due to the inherent characteristics of the components constituting the solid-state circuit breaker, the solid-state circuit breaker has long service life and high reliability.

（2）灵敏度高，控制功率小，电磁兼容性好:固态断路器的输入电压范围较宽，驱动功率低，可与大多数逻辑集成电路兼容不需加缓冲器或驱动器。

(2) High sensitivity, low control power and good electromagnetic compatibility: the input voltage range of solid-state circuit breaker is wide and the driving power is low. It can be compatible with most logic integrated circuits without adding buffer or driver.

固态断路器的规格选择

Specification selection of solid state circuit breaker

（1）单相 直流控交流 交流控交流 直流控直流 10A-120A

(1) Single phase DC controlled AC controlled DC 10a-120a

（2）三相 直流控交流 交流控交流 10-120A

(2) Three phase DC controlled AC 10-120a

固态断路器通过大电流时，一般都会发热，然后固态本身的散热没有那么完善，长时间的发热，会导致固态断路器的损坏，所以这个时候散热器就起到了一个很大的作用，散热器的选择也分很多种，一般根据固态断路器的体积不同也选择适应的散热器。

When the solid-state circuit breaker passes through a large current, it will generally generate heat, and then the heat dissipation of the solid-state circuit breaker itself is not so perfect. Long-term heating will lead to the damage of the solid-state circuit breaker. Therefore, at this time, the radiator plays a great role. There are many kinds of radiator choices. Generally, the appropriate radiator is also selected according to the volume of the solid-state circuit breaker.