What type of circuit protective device must require manual restoration after tripping?

The correct answer is the manual reset circuit breaker. A manual reset circuit breaker is specifically designed to require a user to physically reset it after it has tripped due to an overload or fault condition. This feature serves as a safety measure, ensuring that the circuit isn't inadvertently re-energized until the underlying issue has been addressed.

In contrast, an automatic reset circuit breaker resets itself after a cooling period without any action needed from the user. A fuse, once it has blown, must be replaced, and while it does provide circuit protection, it does not require a manual reset in the same sense. A current limit switch works on a different principle and is generally used to limit current flow in electrical systems but does not fall under the category of devices that require manual intervention after a trip. Thus, the choice of manual reset circuit breaker is aligned with the requirement of needing manual restoration after a fault condition.