Which of the following are types of overcurrent devices?

Overcurrent devices are specifically designed to protect electrical circuits from excessive current that could cause damage or create a fire hazard. Fuses and circuit breakers are prime examples of such devices.

Fuses operate by melting a metal strip when the current exceeds a predetermined limit, thereby interrupting the flow of electricity and protecting the circuit. Circuit breakers, on the other hand, automatically switch off when they detect an overcurrent condition, allowing for the circuit to be reset after the issue has been resolved.

In contrast, diodes and resistors, mentioned in one of the answer choices, serve different purposes in electrical circuits but are not designed to protect against overcurrent. Transformers and capacitors also do not fulfill this role, as they are used primarily for voltage regulation and energy storage, respectively. Finally, conductors and connectors facilitate the flow of electricity but do not offer protection from overcurrent situations.

Thus, fuses and circuit breakers effectively embody the role of overcurrent protection devices, confirming that this is indeed the correct choice.