The answer to 'types of circuit breaker' is that there are several common types of circuit breakers used in residential and commercial electrical systems. The most common types are thermal-magnetic, electronic, and GFCI (ground fault circuit interrupter) circuit breakers.
Thermal-magnetic circuit breakers use a bimetallic strip that heats up and trips the breaker when too much current flows through the circuit. Electronic circuit breakers use solid-state components to monitor the current and trip the breaker when necessary. GFCI circuit breakers are designed to quickly detect ground faults and shut off power to prevent electrical shocks and fires.