JSB-430型半导体时间继电器用于铁路信号控制电路中作为延时元件。该继电器研制前采用JSB-850型半导体时间继电器,因其延时稳定性较差,并且执行继电器JWX-370后接点压力在延时过程中有所降低,为了进一步提高产品质量,西安信号工厂研究所对其进行了改进设计。改进后的电路,增加了小功率可控硅30T(?)KC,CT电容器原来 JSB-430-type semiconductor time relay for the railway signal control circuit as a delay element. The relay used before the development of JSB-850 semiconductor time relay, because of its poor delay stability, and the implementation of relays JWX-370 contact pressure in the delay process has been reduced, in order to further improve product quality, Xi’an Signal Factory Research It has been improved design. Improved circuit, an increase of low-power SCR 30T (?) KC, CT capacitor original