Pole component and circuit breaker comprising same

A pole component comprising:

• an upper terminal;
• a lower terminal disposed to be spaced apart from the upper terminal at a predetermined interval;
• a breaker part assembly including a fixed electrode electrically connected to the upper terminal, a movable electrode selectively connected to the fixed electrode, and a current conducting portion fixed to the movable electrode and electrically connected to the lower terminal;
• an outer housing having an open lower surface to accommodate the upper terminal, the lower terminal, and the breaker part assembly;
• and
• an inner housing detachably disposed between the outer housing and breaker part assembly, wherein the inner housing includes:
• a plate-shaped front portion disposed to face an inner surface of the outer housing;
• and
• a pair of side surface portions formed to extend from both sides of the front portion in a direction toward the breaker part assembly.