Types of Circuit Breaker

It depends what circuit you are making. 
Circuit breakers come in different 'ratings' and so are chosen according to the power demands of the circuit you have.
You don't choose a circuit for a circuit breaker as such, you choose a circuit breaker according to what circuit you have made.
There are several type of circuit breakers now a day we are using these are as follows:

1. M.C.B. (Miniature circuit Breaker)
Rating : 1, 2, 4, 6, 10, 16, 20, 25, 32, 63 Amperes

2. M.C.C.B. (Molded case circuit Breaker)
Rating : 10, 16, 20, 25, 32, 63, 100, 200, 250, 400 Amperes.

3. A.C.B. (Air Circuit Breaker)
Rating : 400, 800, 1000, 1200, 1500, 1800, 2000 Amperes.

4. A. B. Switch (Air Breaker)
used in High tension line.

5. SF6 Breaker (Contact break in the Sf6 medium)
used in High tension line.

mcb internal circuit shown in figure ....