Rotating shaft and molded case circuit breaker

The utility model discloses a rotating shaft and a molded case circuit breaker, the rotating shaft comprises at least two moving contact installation parts, each moving contact installation part is provided with a through channel, and one end of each moving contact passes through the through channel to the outer side of the rotating shaft; a width adjusting assembly is detachably mounted on the moving contact mounting part, and when the width adjusting assembly is not mounted, the width of the through channel is maximum so as to adapt to a first type of moving contact; after the width adjusting assembly is installed, the width size of the through channel is reduced so as to adapt to other types of moving contacts. The sizes of other types of moving contacts are smaller than those of the first type of moving contacts; according to the utility model, the universality of the rotating shaft is stronger, and the rotating shaft is suitable for various types of moving contacts. 本实用新型公开了一种转轴以及塑壳断路器，其包括至少两个动触头安装部，动触头安