Which of the following components is part of a dual element fuse?

A dual element fuse is designed to provide both overcurrent protection and time delay capabilities. This is particularly useful in applications where brief overloads can occur without causing damage to the connected equipment. The time delay characteristic allows the fuse to withstand a temporary surge of current, such as when motors start, without blowing immediately.

In a dual element fuse, one of the elements is designed to respond quickly to short circuits and the other is a time-delay element that can handle temporary overloads. This dual functionality ensures that the fuse appropriately reacts to different types of electrical faults, thereby protecting both the circuit and the equipment connected to it.

The other options—fuse holder, breaker mechanism, and voltage regulator—are related components found in electrical systems but do not specifically define the unique characteristics of a dual element fuse. The fuse holder provides the necessary support for the fuse itself, the breaker mechanism refers to a different type of protective device that interrupts fault currents, and a voltage regulator is used to maintain a stable voltage output, which is not directly related to the function of a fuse.